Contacts of the helix formed by residues 87 - 116 (chain D) in PDB entry 1NF6


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ALA 87 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40D  MET*     6.0     0.9    -      -       -      -
     85D  GLY      3.4     3.7    +      -       -      -
     86D  GLN*     1.3    75.6    -      -       -      +
     88D  VAL*     1.3    61.2    +      -       -      +
     89D  PRO*     3.4    13.0    -      -       +      -
     90D  VAL*     3.1    16.5    +      -       +      +
     91D  ILE*     3.0    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 88 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37D  LEU*     4.1    11.0    -      -       +      -
     40D  MET*     3.5    39.4    -      -       +      +
     42D  TYR*     4.7     8.5    -      -       +      -
     45D  LEU*     5.3     0.7    -      -       +      -
     87D  ALA*     1.3    67.8    -      -       -      +
     89D  PRO*     1.3    74.1    -      -       +      +
     90D  VAL      3.2     0.3    +      -       -      -
     91D  ILE*     3.5     9.8    +      -       -      -
     92D  TYR*     3.3    27.7    -      -       +      -
    146D  ILE*     3.6    30.9    -      -       +      +
    154D  LEU*     4.7    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 89 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  ALA*     3.5    13.5    -      -       +      -
     88D  VAL*     1.3    96.1    -      -       +      +
     90D  VAL*     1.3    63.9    +      -       +      +
     92D  TYR*     3.9     2.1    +      -       -      +
     93D  GLU*     3.4    21.1    +      -       -      +
    143D  GLY*     6.0     0.5    -      -       -      -
    146D  ILE*     4.2    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 90 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  GLN*     4.1    20.6    -      -       +      +
     87D  ALA*     3.1    24.6    +      -       +      +
     89D  PRO*     1.3    83.8    -      -       +      +
     91D  ILE*     1.3    60.1    +      -       -      +
     93D  GLU*     3.1     8.6    +      -       +      +
     94D  SER*     2.4    44.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 91 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33D  GLN*     3.6    31.0    -      -       +      +
     36D  SER*     5.0     1.3    -      -       -      -
     37D  LEU*     4.0    27.4    -      -       +      -
     40D  MET*     4.4     5.4    -      -       +      -
     49D  MET*     3.7    15.0    -      -       +      -
     86D  GLN*     3.8    20.8    -      -       +      +
     87D  ALA      3.0    16.5    +      -       -      +
     88D  VAL*     3.6    24.0    -      -       +      +
     90D  VAL*     1.3    76.8    -      -       -      +
     92D  TYR*     1.3    67.7    +      -       +      +
     94D  SER*     3.4     3.4    +      -       -      -
     95D  ASP*     3.0    48.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 92 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37D  LEU*     3.3    17.6    -      -       +      +
     45D  LEU*     3.3    34.2    +      -       +      +
     49D  MET*     4.0    14.4    -      -       +      +
     88D  VAL*     3.3    28.3    +      -       +      +
     89D  PRO      4.6     2.2    -      -       -      +
     90D  VAL      3.3     0.4    -      -       -      -
     91D  ILE*     1.3    87.1    -      -       +      +
     93D  GLU*     1.3    65.8    +      -       -      +
     95D  ASP*     4.1     3.4    -      -       -      +
     96D  ALA*     3.6    20.1    +      -       -      +
    138D  TYR*     4.5     4.8    +      +       -      -
    139D  TYR*     3.7    28.1    -      +       -      +
    142D  ILE*     3.5    39.3    -      -       +      -
    143D  GLY*     3.8    24.3    -      -       -      +
    146D  ILE*     3.6    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 93 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89D  PRO      3.4    18.0    +      -       -      +
     90D  VAL*     3.1    11.3    +      -       +      +
     92D  TYR*     1.3    80.5    -      -       -      +
     94D  SER*     1.3    61.9    +      -       -      +
     96D  ALA*     3.6     2.6    +      -       -      +
     97D  ASP*     3.2    35.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 94 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  GLN*     6.2     0.9    -      -       -      -
     86D  GLN*     3.4    22.3    +      -       -      -
     90D  VAL*     2.4    34.3    +      -       -      +
     91D  ILE*     3.4     5.4    +      -       -      -
     93D  GLU*     1.3    78.1    -      -       -      +
     95D  ASP*     1.3    60.7    +      -       -      +
     97D  ASP*     3.4     9.7    +      -       -      +
     98D  GLN*     2.9    32.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 95 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  GLN*     4.5     0.9    -      -       -      +
     30D  TYR*     3.0    23.6    +      -       +      -
     33D  GLN*     2.3    44.9    +      -       -      +
     49D  MET*     3.3    17.2    -      -       -      +
     91D  ILE*     3.0    22.7    +      -       -      +
     92D  TYR*     4.6     0.4    -      -       -      -
     93D  GLU      3.4     0.2    -      -       -      -
     94D  SER*     1.3    77.7    +      -       -      +
     96D  ALA*     1.3    58.6    +      -       -      +
     98D  GLN*     3.5     4.3    +      -       -      +
     99D  GLU*     2.9    32.9    +      -       -      +
    139D  TYR*     3.6    27.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 96 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92D  TYR      3.6    18.2    +      -       -      +
     93D  GLU      3.9     3.4    -      -       -      +
     94D  SER      3.2     0.4    -      -       -      -
     95D  ASP*     1.3    77.1    -      -       -      +
     97D  ASP*     1.3    69.4    +      -       -      +
     99D  GLU      3.1     1.0    +      -       -      -
    100D  ASP*     2.9    24.9    +      -       -      +
    136D  LEU*     3.6    19.1    -      -       +      +
    139D  TYR*     3.8    19.0    -      -       +      +
    140D  GLU*     4.4    14.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 97 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  GLU*     3.2    28.5    +      -       -      +
     94D  SER*     3.4    10.8    +      -       -      +
     96D  ALA*     1.3    78.6    -      -       -      +
     98D  GLN*     1.3    57.7    +      -       -      +
    100D  ASP*     3.5     8.3    +      -       -      +
    101D  ALA*     3.1    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 98 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22D  MET      4.9     1.4    +      -       -      -
     25D  HIS*     3.3    32.2    +      -       -      -
     26D  ALA*     3.7    25.5    -      -       -      +
     29D  GLN*     3.9    18.6    +      -       -      +
     30D  TYR*     3.8    16.4    +      -       -      +
     94D  SER*     2.9    18.4    +      -       -      +
     95D  ASP*     3.6     6.6    -      -       -      +
     97D  ASP*     1.3    75.5    -      -       -      +
     99D  GLU*     1.3    61.3    +      -       -      +
    101D  ALA*     3.1     6.0    +      -       -      +
    102D  THR*     2.9    39.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 99 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26D  ALA*     5.3     0.7    -      -       -      +
     30D  TYR*     2.5    31.9    +      -       -      -
     56D  GLU*     3.3     1.8    -      -       -      +
     95D  ASP      2.9    21.2    +      -       -      +
     96D  ALA      3.1     3.3    +      -       -      +
     98D  GLN*     1.3    75.7    -      -       -      +
    100D  ASP*     1.3    58.1    +      -       -      +
    102D  THR*     3.4     6.1    +      -       -      +
    103D  ILE*     3.0    35.2    +      -       -      +
    132D  GLU*     3.1    16.1    -      -       -      +
    135D  HIS*     3.2    17.9    -      -       +      +
    136D  LEU*     4.0    19.7    -      -       +      +
    139D  TYR*     3.7    17.5    -      -       +      -
    200D   FE      2.2    30.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 100 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  ALA      2.9    16.5    +      -       -      +
     97D  ASP*     3.6     8.8    -      -       -      +
     99D  GLU*     1.3    79.7    -      -       -      +
    101D  ALA*     1.3    57.9    +      -       -      +
    103D  ILE*     3.7     5.9    +      -       -      +
    104D  GLU*     3.2    34.5    +      -       -      +
    136D  LEU*     4.3    23.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 101 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22D  MET*     4.3     4.2    -      -       +      +
     97D  ASP      3.1    16.4    +      -       -      +
     98D  GLN*     3.1     6.5    +      -       -      +
    100D  ASP*     1.3    76.5    +      -       -      +
    102D  THR*     1.3    62.2    +      -       -      +
    104D  GLU*     3.3     7.7    +      -       -      +
    105D  ALA*     2.8    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 102 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22D  MET*     3.4    22.4    -      -       -      +
     23D  GLU*     5.6     0.2    -      -       -      -
     98D  GLN*     2.9    25.6    +      -       -      +
     99D  GLU*     3.6     4.8    +      -       -      -
    101D  ALA*     1.3    77.4    -      -       -      +
    103D  ILE*     1.3    52.9    +      -       -      +
    105D  ALA      3.2     0.2    +      -       -      -
    106D  TYR*     2.7    75.0    +      -       +      +
    132D  GLU*     2.8    31.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  GLU      3.0    21.6    +      -       -      +
    100D  ASP*     3.9     7.4    -      -       -      +
    102D  THR*     1.3    76.3    -      -       -      +
    104D  GLU*     1.3    61.1    +      -       -      +
    106D  TYR*     4.0     5.0    -      -       -      +
    107D  SER*     2.5    46.6    +      -       -      +
    129D  ILE*     4.2    18.1    -      -       +      +
    132D  GLU*     3.6    20.2    -      -       +      +
    133D  GLN*     3.7    44.9    -      -       +      +
    136D  LEU*     3.9    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 104 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  ASP*     3.2    25.3    +      -       -      +
    101D  ALA*     3.5    11.2    -      -       -      +
    102D  THR      3.3     0.2    -      -       -      -
    103D  ILE*     1.3    86.5    -      -       -      +
    105D  ALA*     1.3    60.1    +      -       -      +
    107D  SER*     3.5     8.9    +      -       -      -
    108D  GLN*     3.2    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22D  MET*     3.7    24.2    -      -       +      -
    101D  ALA      2.8    19.9    +      -       -      +
    104D  GLU*     1.3    72.7    -      -       -      +
    106D  TYR*     1.3    59.9    +      -       -      +
    108D  GLN*     3.1     7.1    +      -       -      +
    109D  PHE*     2.9    50.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19D  ALA*     3.4    31.0    +      -       +      -
     22D  MET*     4.1    14.9    -      -       -      +
     23D  GLU*     2.8    35.5    +      -       -      +
     63D  PHE*     3.7     4.4    -      +       -      -
    102D  THR*     2.7    47.2    +      -       +      +
    103D  ILE*     4.0     1.3    -      -       -      +
    105D  ALA*     1.3    73.0    -      -       +      +
    107D  SER*     1.3    57.9    +      -       -      +
    109D  PHE*     3.4    17.2    -      +       -      +
    110D  LEU*     2.8    29.5    +      -       -      +
    125D  PHE*     4.0    12.5    -      +       +      -
    128D  ILE*     3.6    33.0    -      -       +      -
    129D  ILE*     3.5    25.6    -      -       +      +
    132D  GLU*     4.2     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 107 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103D  ILE*     2.5    32.0    +      -       -      +
    104D  GLU*     3.7    12.0    +      -       -      -
    106D  TYR*     1.3    78.5    -      -       -      +
    108D  GLN*     1.3    63.0    +      -       -      +
    110D  LEU*     3.8     6.2    -      -       -      +
    111D  LYS*     3.6    21.1    +      -       -      +
    114D  LYS*     5.7     0.9    +      -       -      -
    129D  ILE*     4.1    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 108 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104D  GLU*     3.2    21.5    +      -       -      +
    105D  ALA*     3.1    11.0    +      -       -      +
    107D  SER*     1.3    79.2    -      -       -      +
    109D  PHE*     1.3    70.0    +      -       +      +
    111D  LYS*     3.0    52.1    +      -       -      +
    112D  VAL*     3.4    11.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 109 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15D  VAL*     4.0    21.1    -      -       +      +
     18D  LYS*     3.6    39.5    -      -       +      -
     19D  ALA*     3.9    17.9    -      -       +      -
     22D  MET*     4.2     7.4    -      -       -      -
    105D  ALA*     2.9    36.3    +      -       +      +
    106D  TYR*     3.4    29.8    -      +       -      +
    108D  GLN*     1.3    79.8    -      -       +      +
    110D  LEU*     1.3    65.9    +      -       -      +
    112D  VAL*     3.2    17.8    +      -       +      +
    113D  CYS*     3.3    15.9    +      -       -      -
    125D  PHE*     3.5    27.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 110 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  TYR      2.8    13.7    +      -       -      +
    107D  SER*     3.8     9.4    -      -       -      +
    109D  PHE*     1.3    76.5    -      -       -      +
    111D  LYS*     1.3    62.1    +      -       -      +
    113D  CYS*     3.1     7.5    +      -       -      +
    114D  LYS*     3.1    62.1    +      -       +      +
    122D  ALA*     4.0    14.6    -      -       +      +
    125D  PHE*     3.8    11.6    -      -       +      -
    126D  GLU*     3.5    44.2    -      -       +      +
    129D  ILE*     3.4    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 111 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  SER      3.6     9.4    +      -       -      +
    108D  GLN*     3.0    52.8    +      -       -      +
    109D  PHE      3.1     0.2    -      -       -      -
    110D  LEU*     1.3    79.5    -      -       -      +
    112D  VAL*     1.3    59.0    +      -       +      +
    114D  LYS*     3.1    22.9    +      -       +      +
    115D  GLU*     2.8    47.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 112 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11D  LYS*     3.7    25.4    -      -       +      +
     12D  VAL*     5.1     0.9    -      -       +      +
     15D  VAL*     4.0    22.0    -      -       +      -
    108D  GLN      3.5    15.3    -      -       -      +
    109D  PHE*     3.2     9.2    +      -       +      +
    111D  LYS*     1.3    77.6    -      -       +      +
    113D  CYS*     1.3    53.0    +      -       -      +
    115D  GLU*     3.0    17.6    +      -       -      +
    116D  GLN*     2.7    56.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 113 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12D  VAL*     4.3    18.4    -      -       -      -
     15D  VAL*     4.6     3.8    -      -       -      -
    109D  PHE      3.6    12.8    -      -       -      -
    110D  LEU      3.1     8.0    +      -       -      +
    112D  VAL*     1.3    77.8    -      -       -      +
    114D  LYS*     1.3    62.2    +      -       -      +
    116D  GLN      3.1     1.9    +      -       -      -
    117D  GLY      3.0     4.2    +      -       -      -
    118D  ASP*     2.8    42.7    +      -       +      +
    121D  THR*     3.5    32.8    -      -       -      -
    122D  ALA*     3.9     9.9    -      -       -      +
    125D  PHE*     3.8    17.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 114 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  SER      5.7     0.6    +      -       -      -
    110D  LEU*     3.1    45.0    +      -       +      +
    111D  LYS*     3.1    22.5    +      -       +      +
    113D  CYS*     1.3    76.3    -      -       -      +
    115D  GLU*     1.3    57.0    +      -       +      +
    117D  GLY*     2.6    28.2    +      -       -      -
    118D  ASP      4.8     1.1    -      -       -      +
    119D  ILE*     5.6     7.2    -      -       +      -
    122D  ALA*     4.8     8.2    -      -       +      +
    126D  GLU*     5.0     3.1    -      -       -      -
    114E  LYS*     5.5     7.6    -      -       -      +
   1404E  SO4      4.1    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 115 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111D  LYS*     2.8    36.5    +      -       +      +
    112D  VAL*     3.0    23.6    +      -       -      +
    114D  LYS*     1.3    77.4    -      -       +      +
    116D  GLN*     1.3    71.4    +      -       -      +
    117D  GLY      3.4     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 116 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3D  GLY*     4.8     5.9    +      -       -      -
      8D  ARG*     2.8    58.6    +      -       +      +
     11D  LYS*     3.5    48.1    +      -       +      +
     12D  VAL*     3.9    17.9    -      -       +      -
    112D  VAL*     2.7    34.6    +      -       +      +
    113D  CYS      3.9     3.4    -      -       -      +
    114D  LYS      3.0     0.2    -      -       -      -
    115D  GLU*     1.3    84.0    +      -       -      +
    117D  GLY*     1.3    63.1    +      -       -      +
    118D  ASP*     3.3     3.2    +      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il