Contacts of the helix formed by residues 84 - 106 (chain D) in PDB entry 1SHZ


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 PHE 84 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66D  LYS*     3.6    29.2    -      -       -      -
     69D  ARG*     6.0     0.2    -      -       -      -
     76D  PHE*     4.3    19.1    -      +       -      -
     80D  ALA      4.1    12.8    -      -       -      -
     81D  ARG      3.2     9.8    +      -       -      +
     82D  GLU      3.0     1.4    -      -       -      -
     83D  GLU*     1.3    90.5    -      -       +      +
     85D  ARG*     1.3    66.5    +      -       -      +
     86D  PRO*     3.2     3.1    -      -       -      -
     87D  THR*     2.9    10.6    +      -       -      +
     88D  ILE*     2.8    38.1    +      -       +      +
    191D  PRO*     4.4     1.6    -      -       +      -
    196D  ILE*     3.7    36.3    -      -       +      -
    199D  ALA*     4.0    19.5    -      -       +      -
    201D  ARG*     3.8    22.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 85 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82D  GLU*     3.1    51.5    +      -       -      +
     84D  PHE*     1.3    79.1    -      -       -      +
     86D  PRO*     1.3    70.6    -      -       +      +
     88D  ILE*     3.3     4.6    +      -       -      +
     89D  TYR*     3.1    51.5    +      -       +      +
    139D  THR*     3.4    27.3    +      -       -      +
    188D  ASP*     5.0     6.4    -      -       -      +
    189D  TYR*     2.9    34.0    +      -       +      +
    191D  PRO*     3.7    17.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 86 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82D  GLU      3.4    10.5    -      -       -      +
     83D  GLU*     3.5    13.9    -      -       -      +
     84D  PHE      3.4     1.3    -      -       -      -
     85D  ARG*     1.3   100.1    -      -       +      +
     87D  THR*     1.3    60.7    +      -       +      +
     89D  TYR*     3.8     0.7    +      -       +      +
     90D  SER*     3.2    16.8    +      -       -      -
    131D  MET*     6.1     2.2    -      -       +      -
    136D  MET*     3.5    23.0    -      -       +      -
    137D  VAL      3.1    44.0    +      -       -      +
    138D  GLU*     5.5     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 87 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83D  GLU      3.7    18.2    -      -       -      +
     84D  PHE*     2.9    15.8    +      -       +      +
     86D  PRO*     1.3    77.9    -      -       +      +
     88D  ILE*     1.3    62.0    +      -       -      +
     89D  TYR      3.2     0.2    -      -       -      -
     90D  SER*     3.4     2.2    +      -       -      -
     91D  ASN*     2.8    39.2    +      -       -      -
    135D  GLY      3.6    17.0    -      -       -      +
    136D  MET*     5.4     3.4    -      -       +      -
    199D  ALA*     4.2    11.4    -      -       -      +
    200D  ARG      4.3     7.0    +      -       -      -
    201D  ARG*     4.0    31.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 88 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84D  PHE*     2.8    20.9    +      -       +      +
     85D  ARG*     3.7     4.3    -      -       -      +
     87D  THR*     1.3    74.2    -      -       -      +
     89D  TYR*     1.3    66.7    +      -       +      +
     91D  ASN*     3.1    12.4    -      -       -      +
     92D  VAL*     3.0    21.9    +      -       -      +
    177D  PHE*     3.4    39.0    -      -       +      -
    184D  LEU*     4.2    14.6    -      -       +      -
    189D  TYR*     3.7    23.1    -      -       +      +
    191D  PRO*     3.7    28.5    -      -       +      -
    195D  ASP*     4.1    15.5    -      -       +      +
    199D  ALA*     4.2    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 89 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85D  ARG*     3.1    43.5    +      -       +      +
     86D  PRO      3.8     4.7    -      -       -      +
     88D  ILE*     1.3    78.1    -      -       +      +
     90D  SER*     1.3    63.5    +      -       -      +
     92D  VAL*     3.0    13.8    +      -       -      +
     93D  ILE*     3.0    17.6    +      -       -      +
    137D  VAL*     3.5    26.5    -      -       +      +
    139D  THR*     3.6    22.8    +      -       +      +
    142D  PHE*     3.4    55.1    -      +       +      -
    184D  LEU*     3.0    34.8    +      -       +      -
    186D  VAL      4.5     2.6    +      -       -      -
    189D  TYR*     3.4    25.0    -      +       -      +
----------------------------------------------------------
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Residues in contact with SER 90 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  PRO      3.2    16.2    +      -       -      -
     87D  THR      3.6     6.1    -      -       -      -
     89D  TYR*     1.3    78.5    -      -       -      +
     91D  ASN*     1.3    63.6    +      -       -      +
     93D  ILE*     4.7     2.0    -      -       -      +
     94D  LYS*     3.0    57.4    +      -       -      +
    135D  GLY*     3.6    23.6    -      -       -      -
    136D  MET      4.0     2.0    +      -       -      -
    137D  VAL*     4.0    16.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 91 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  THR*     2.8    23.5    +      -       -      -
     88D  ILE*     3.1    16.9    -      -       -      +
     90D  SER*     1.3    77.1    +      -       -      +
     92D  VAL*     1.3    61.4    +      -       -      +
     94D  LYS*     4.6     1.4    -      -       -      +
     95D  GLY*     3.2    15.2    +      -       -      -
    174D  VAL*     3.6    21.3    -      -       +      +
    177D  PHE*     4.4    13.2    -      -       +      -
    199D  ALA*     3.7    10.9    -      -       -      +
    200D  ARG*     3.3    49.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 92 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88D  ILE      3.4    14.4    -      -       -      +
     89D  TYR*     3.0     6.8    +      -       -      +
     91D  ASN*     1.3    74.5    -      -       -      +
     93D  ILE*     1.3    61.6    +      -       -      +
     95D  GLY*     3.0     3.0    +      -       -      -
     96D  MET*     2.8    28.1    +      -       -      +
    142D  PHE*     4.5     8.1    -      -       +      -
    149D  ILE*     4.2    18.2    -      -       +      -
    174D  VAL*     5.0     7.0    -      -       -      +
    177D  PHE*     3.5    33.0    -      -       +      -
    178D  LEU*     3.5    29.1    -      -       +      +
    181D  LEU*     4.3     8.7    -      -       +      -
    184D  LEU*     4.5    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 93 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89D  TYR      3.0    12.7    +      -       -      +
     90D  SER*     4.2     3.4    -      -       -      +
     92D  VAL*     1.3    71.1    -      -       -      +
     94D  LYS*     1.3    69.1    +      -       +      +
     95D  GLY      2.9     0.9    -      -       -      -
     96D  MET*     3.2     6.5    +      -       -      +
     97D  ARG*     2.9    32.9    +      -       +      +
    122D  LEU*     4.4    10.0    -      -       +      +
    125D  PHE*     3.7    41.3    -      -       +      -
    137D  VAL*     3.8    26.7    -      -       +      -
    141D  VAL      5.1     1.6    -      -       -      +
    142D  PHE*     3.6    31.6    -      -       +      -
    145D  TYR*     5.0     8.3    -      -       +      -
    149D  ILE*     4.1    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 94 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90D  SER*     3.0    38.5    +      -       -      +
     91D  ASN*     4.6     1.6    -      -       -      +
     93D  ILE*     1.3    80.5    -      -       +      +
     95D  GLY*     1.3    61.8    +      -       -      +
     97D  ARG*     3.5    11.3    +      -       -      +
     98D  VAL*     3.1    29.1    +      -       -      +
    125D  PHE*     4.4    15.0    -      -       +      -
    127D  THR*     3.5    21.9    +      -       -      +
    132D  ALA*     2.9    28.5    +      -       -      +
    133D  ALA      5.8     0.4    -      -       -      -
    135D  GLY*     4.4     6.3    -      -       -      -
    137D  VAL*     5.7     1.2    -      -       -      +
     26F  ALA*     3.8    29.2    -      -       +      -
     27F  GLU      5.5     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 95 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91D  ASN      3.2    14.6    +      -       -      -
     92D  VAL      3.0     7.1    +      -       -      -
     93D  ILE      2.9     1.0    -      -       -      -
     94D  LYS*     1.3    75.4    -      -       -      +
     96D  MET*     1.3    65.7    +      -       -      +
     98D  VAL*     3.1     6.5    +      -       -      +
     99D  LEU*     3.0    23.4    +      -       -      +
    170D  LEU*     3.7    13.9    -      -       -      +
    174D  VAL*     4.1    17.5    -      -       -      -
    178D  LEU*     6.1     0.4    -      -       -      -
     26F  ALA*     5.9     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 96 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92D  VAL      2.8    17.7    +      -       -      +
     93D  ILE*     3.2     4.7    +      -       -      +
     95D  GLY*     1.3    72.4    -      -       -      +
     97D  ARG*     1.3    52.0    +      -       -      +
     99D  LEU*     2.9    18.9    +      -       +      +
    100D  VAL*     2.8    39.0    +      -       +      +
    122D  LEU*     3.4    29.8    -      -       +      -
    149D  ILE*     3.8    28.9    -      -       +      +
    152D  LEU*     3.8    20.0    -      -       +      -
    153D  TRP*     3.9    16.6    -      -       +      +
    158D  ILE*     4.1     8.3    -      -       -      -
    178D  LEU*     3.6    38.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 97 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  ILE*     2.9    29.0    +      -       +      +
     94D  LYS*     3.6    11.1    -      -       -      +
     96D  MET*     1.3    74.1    -      -       -      +
     98D  VAL*     1.3    64.6    -      -       +      +
    100D  VAL*     3.3    11.4    -      -       -      +
    101D  ASP*     3.1    24.8    +      -       -      +
    122D  LEU*     3.1    32.1    -      -       +      +
    123D  MET*     3.0    43.0    +      -       -      +
    125D  PHE*     3.6    26.3    +      -       -      -
    127D  THR*     4.1    24.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 98 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  LYS      3.1    16.9    +      -       -      +
     95D  GLY*     3.5     7.2    -      -       -      +
     97D  ARG*     1.3    76.9    -      -       +      +
     99D  LEU*     1.3    58.2    +      -       -      +
    101D  ASP*     3.9     2.7    -      -       -      +
    102D  ALA*     3.0    26.3    +      -       -      +
    168D  PHE*     3.8    29.8    -      -       +      -
    169D  GLN      3.8    13.5    -      -       -      +
    170D  LEU*     4.0    10.3    -      -       +      -
     23F  ILE*     4.5     3.1    -      -       +      +
     24F  ILE      3.9    14.1    -      -       -      +
     25F  GLY*     3.4    27.4    -      -       -      -
     26F  ALA*     3.4    11.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 99 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95D  GLY      3.0    14.5    +      -       -      +
     96D  MET*     2.9    27.8    +      -       -      +
     98D  VAL*     1.3    76.3    -      -       -      +
    100D  VAL*     1.3    62.8    +      -       -      +
    102D  ALA*     3.3     3.2    +      -       -      +
    103D  ARG*     3.1    21.0    +      -       -      +
    153D  TRP*     4.2    15.7    -      -       +      -
    158D  ILE*     3.6    27.4    -      -       +      +
    161D  ALA*     4.1     6.5    -      -       +      +
    162D  TYR*     4.1    24.7    -      -       +      +
    168D  PHE*     4.1    11.9    -      -       +      -
    170D  LEU*     3.7    30.5    -      -       +      -
    174D  VAL*     5.2     1.3    -      -       +      -
    178D  LEU*     4.4     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 100 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  MET*     2.8    28.0    +      -       +      +
     97D  ARG*     3.3     5.4    -      -       -      +
     99D  LEU*     1.3    71.8    -      -       -      +
    101D  ASP*     1.3    68.7    +      -       -      +
    103D  ARG*     3.1    14.8    +      -       -      +
    104D  GLU*     3.1    20.5    +      -       -      +
    110D  TRP*     5.5     5.6    -      -       +      -
    119D  GLY*     4.1    14.4    -      -       -      +
    122D  LEU*     4.9     3.1    -      -       +      -
    123D  MET*     3.1    43.1    -      -       +      +
    152D  LEU*     3.8    28.7    -      -       +      -
    158D  ILE*     5.0     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 101 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97D  ARG      3.1     9.0    +      -       -      +
     98D  VAL*     3.9     5.4    -      -       -      +
    100D  VAL*     1.3    83.2    -      -       -      +
    102D  ALA*     1.3    56.8    +      -       -      +
    104D  GLU*     3.4     9.3    +      -       -      +
    105D  LYS*     2.9    64.1    +      -       -      +
    123D  MET*     3.2    27.9    -      -       +      +
     23F  ILE*     4.1    13.5    -      -       +      +
     24F  ILE*     4.3    14.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 102 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98D  VAL      3.0    19.6    +      -       -      +
     99D  LEU      3.7     4.7    -      -       -      +
    100D  VAL      3.2     0.2    -      -       -      -
    101D  ASP*     1.3    76.7    -      -       -      +
    103D  ARG*     1.3    58.8    +      -       -      +
    105D  LYS*     4.4     2.7    -      -       -      -
    106D  LEU*     2.9    40.4    +      -       +      +
    161D  ALA*     4.7     2.9    -      -       +      -
    168D  PHE*     3.6    42.2    -      -       +      -
     23F  ILE*     4.1    12.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152C  ARG*     5.8     1.0    -      -       -      +
    155C  GLU*     3.3    26.1    +      -       -      +
     99D  LEU      3.1    13.4    +      -       -      +
    100D  VAL*     3.3    15.9    +      -       -      +
    102D  ALA*     1.3    80.6    -      -       -      +
    104D  GLU*     1.3    97.1    +      -       -      +
    107D  HIS*     3.3     1.5    +      -       -      +
    108D  ILE*     3.0    60.7    +      -       +      +
    109D  PRO*     5.6     0.2    -      -       -      +
    110D  TRP*     3.1    64.7    -      -       -      +
    116D  GLN*     4.4     0.6    +      -       -      -
    157D  GLY      4.0    24.0    -      -       -      +
    158D  ILE*     4.4    12.1    -      -       +      +
    161D  ALA*     4.5     7.1    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     47C  GLN*     5.3     0.3    +      -       -      -
    155C  GLU*     3.7    28.5    -      -       -      +
    158C  ARG*     3.2    52.9    +      -       -      +
    159C  SER*     4.4     8.0    +      -       -      +
    162C  LEU*     5.8     3.5    -      -       +      +
    100D  VAL      3.1     6.7    +      -       -      +
    101D  ASP*     3.8    11.8    -      -       -      +
    103D  ARG*     1.3    99.9    +      -       -      +
    105D  LYS*     1.3    70.2    +      -       +      +
    107D  HIS*     2.9    28.9    +      -       -      -
    123D  MET*     5.8     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270A  LYS*     4.5    11.1    +      -       -      -
    162C  LEU*     3.5    33.4    -      -       +      +
    101D  ASP*     2.9    55.7    +      -       -      +
    102D  ALA      4.1     1.6    -      -       -      +
    104D  GLU*     1.3    89.7    +      -       -      +
    106D  LEU*     1.3    60.2    +      -       -      +
    107D  HIS*     3.3    12.2    +      -       -      -
     22F  SER*     3.9    18.8    -      -       -      +
     23F  ILE*     3.8    26.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266A  HIS*     5.5     2.7    -      -       +      -
    270A  LYS*     4.8     7.5    -      -       -      +
    102D  ALA*     2.9    34.0    +      -       +      +
    105D  LYS*     1.3    71.0    -      -       -      +
    107D  HIS*     1.3    71.3    +      -       -      +
    108D  ILE*     3.5    28.2    +      -       +      +
    161D  ALA*     5.0     1.8    -      -       -      -
    164D  ARG*     4.0    38.6    +      -       +      +
    167D  GLU*     4.6    14.4    -      -       +      +
    168D  PHE*     4.1    23.8    -      -       +      -
     23F  ILE*     4.2    19.1    -      -       +      -
----------------------------------------------------------
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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