Contacts of the helix formed by residues 87 - 114 (chain A) in PDB entry 4QYD


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 THR 87 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  ASN*     3.5     9.6    -      -       +      +
     84A  ALA*     2.7    41.9    +      -       +      +
     85A  LYS      3.3     0.6    -      -       -      -
     86A  ASP*     1.3    83.7    -      -       -      +
     88A  ILE*     1.3    64.9    +      -       -      +
     89A  PHE*     3.6    15.4    +      -       +      -
     90A  TYR*     3.1    17.0    +      -       -      +
     91A  ARG*     3.2    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  ILE*     4.0    11.7    -      -       +      +
     87A  THR*     1.3    73.1    -      -       -      +
     89A  PHE*     1.3    93.0    +      -       +      +
     91A  ARG*     3.6    24.9    -      -       -      +
     92A  ALA*     3.0    30.7    +      -       -      +
     95A  ARG*     5.1     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  ILE*     3.8    22.9    -      -       +      -
     79A  CYS*     3.2    16.5    -      -       -      -
     83A  ASN*     3.6    32.8    -      -       -      +
     87A  THR*     3.1    13.2    -      -       +      +
     88A  ILE*     1.3   100.8    -      -       +      +
     90A  TYR*     1.3    65.2    +      -       -      +
     92A  ALA*     3.3     7.0    +      -       -      +
     93A  ALA      3.0    18.2    +      -       -      -
     12B  ALY      3.5    41.1    -      -       +      -
     13B  GLY      3.8    26.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  CYS*     4.5     6.7    -      -       -      -
     80A  LEU*     3.7    30.4    -      -       +      +
     83A  ASN*     3.5    21.4    -      -       +      +
     84A  ALA      3.2    17.3    -      -       -      +
     85A  LYS*     3.3    38.3    -      -       +      +
     87A  THR*     3.1     7.5    +      -       -      +
     89A  PHE*     1.3    78.2    -      -       -      +
     91A  ARG*     1.3    66.3    -      -       +      +
     93A  ALA*     3.1     5.4    +      -       -      +
     94A  VAL*     3.0    43.4    +      -       +      +
      8B  LYS*     3.8    16.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  LYS      4.3     9.2    -      -       -      +
     86A  ASP*     3.0    34.6    +      -       -      +
     87A  THR      3.2    12.7    +      -       -      +
     88A  ILE*     3.6    34.7    -      -       -      +
     90A  TYR*     1.3    82.9    -      -       +      +
     92A  ALA*     1.3    61.7    +      -       -      +
     94A  VAL*     3.3     8.1    +      -       -      +
     95A  ARG*     3.1    39.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  ASP*     5.5     1.3    -      -       -      +
     27A  ILE*     3.5    23.8    -      -       +      -
     28A  PHE*     4.1    14.2    -      -       +      -
     88A  ILE      3.0    19.3    +      -       -      +
     89A  PHE      3.5     4.3    -      -       -      +
     91A  ARG*     1.3    77.9    -      -       -      +
     93A  ALA*     1.3    57.8    +      -       -      +
     95A  ARG*     3.3    24.6    +      -       -      +
     96A  LEU*     2.8    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  PHE*     3.8     9.3    -      -       +      -
     76A  VAL*     3.6    15.3    -      -       +      +
     79A  CYS*     3.8    25.1    -      -       +      -
     80A  LEU*     3.7    17.0    -      -       +      -
     89A  PHE      3.0    13.5    +      -       -      +
     90A  TYR      3.1     8.0    +      -       -      +
     92A  ALA*     1.3    73.0    -      -       -      +
     94A  VAL*     1.3    62.3    +      -       -      +
     96A  LEU*     3.9     3.5    -      -       -      -
     97A  ARG*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  LEU*     3.7    18.4    -      -       +      -
     90A  TYR*     3.0    38.1    +      -       +      +
     91A  ARG*     3.3     9.6    +      -       -      +
     93A  ALA*     1.3    79.0    -      -       -      +
     95A  ARG*     1.3    64.9    +      -       +      +
     97A  ARG*     3.4     7.5    +      -       -      +
     98A  GLU*     3.4    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24A  THR*     5.1     9.3    +      -       -      -
     27A  ILE*     5.6     1.2    -      -       -      +
     88A  ILE      5.1     0.8    +      -       -      -
     91A  ARG*     3.1    31.4    +      -       -      +
     92A  ALA*     3.6    29.1    -      -       -      +
     94A  VAL*     1.3    80.3    -      -       +      +
     96A  LEU*     1.3    57.7    +      -       -      +
     98A  GLU*     3.1     7.0    +      -       -      +
     99A  GLN*     2.9    47.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  LEU      3.9    10.8    -      -       -      +
     22A  LYS*     3.8    29.6    -      -       +      +
     23A  ASP*     4.5     7.4    -      -       +      +
     28A  PHE*     3.5    35.2    -      -       +      -
     50A  PHE*     4.2     8.3    -      -       +      -
     72A  PHE*     3.7    30.9    -      -       +      -
     75A  ILE*     4.5     2.5    -      -       +      -
     76A  VAL*     4.0    10.5    -      -       +      -
     92A  ALA      2.8    18.3    +      -       -      +
     93A  ALA*     3.9     5.6    -      -       -      +
     95A  ARG*     1.3    73.2    -      -       -      +
     97A  ARG*     1.3    59.3    +      -       -      +
     99A  GLN*     4.8     3.1    -      -       -      -
    100A  GLY*     2.7    36.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  PHE*     5.2     2.9    -      -       -      -
     73A  ASN*     5.2     1.4    +      -       -      +
     76A  VAL*     3.7    24.5    -      -       +      +
     77A  SER*     4.2    17.2    -      -       -      +
     80A  LEU*     3.4    32.5    -      -       +      +
     93A  ALA      2.9    19.0    +      -       -      +
     94A  VAL*     3.6     7.2    -      -       -      +
     96A  LEU*     1.3    74.8    -      -       -      +
     98A  GLU*     1.3    59.5    +      -       -      +
    101A  GLY*     3.0    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  VAL*     3.4    10.7    +      -       -      +
     95A  ARG*     3.1     9.9    +      -       -      +
     97A  ARG*     1.3    83.7    -      -       +      +
     99A  GLN*     1.3    63.5    +      -       +      +
    101A  GLY*     3.9     0.5    -      -       -      -
    102A  ALA*     3.3    19.9    +      -       -      +
    105A  ARG*     5.4     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  LYS*     3.9    49.8    -      -       +      +
     95A  ARG*     2.9    33.3    +      -       +      +
     96A  LEU*     4.5     1.4    +      -       -      +
     98A  GLU*     1.3    75.7    -      -       +      +
    100A  GLY*     1.3    66.0    +      -       -      +
    102A  ALA*     3.3     8.8    +      -       -      +
    103A  VAL*     3.3    23.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  LEU*     3.6    21.3    -      -       -      +
     22A  LYS*     5.1     1.1    -      -       -      -
     72A  PHE*     4.0    10.8    -      -       -      -
     96A  LEU*     2.7    28.5    +      -       -      +
     99A  GLN*     1.3    71.0    -      -       -      +
    101A  GLY*     1.3    57.9    +      -       -      +
    103A  VAL*     3.1     5.5    +      -       -      +
    104A  LEU*     2.9    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  PHE*     4.7     1.9    -      -       -      -
     97A  ARG*     3.0    21.9    +      -       -      +
     98A  GLU*     3.9     1.8    -      -       -      -
     99A  GLN      3.2     0.2    -      -       -      -
    100A  GLY*     1.3    76.3    -      -       -      +
    102A  ALA*     1.3    55.6    +      -       -      +
    104A  LEU*     3.4     8.8    +      -       -      +
    105A  ARG*     3.0    39.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  GLU      3.3    10.6    +      -       -      +
     99A  GLN*     3.3    11.3    +      -       -      +
    100A  GLY      3.3     0.2    -      -       -      -
    101A  GLY*     1.3    72.4    -      -       -      +
    103A  VAL*     1.3    66.0    +      -       +      +
    105A  ARG*     3.4    30.5    +      -       -      +
    106A  GLN*     3.2    23.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  THR*     3.9    24.9    -      -       +      +
     18A  GLN*     3.9    30.7    -      -       +      +
     19A  LEU*     3.8    23.1    -      -       +      -
     22A  LYS*     4.1    21.5    -      -       +      -
     99A  GLN      3.3    13.2    +      -       -      +
    100A  GLY*     3.1     8.7    +      -       -      +
    102A  ALA*     1.3    78.4    -      -       +      +
    104A  LEU*     1.3    57.5    +      -       -      +
    106A  GLN*     3.2    10.0    +      -       -      +
    107A  ALA*     2.9    26.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  THR*     4.1     8.1    -      -       +      -
     19A  LEU*     4.3     7.2    -      -       +      -
     65A  PHE*     3.8    23.2    -      -       +      -
     68A  PHE*     3.9    22.4    -      -       +      -
     69A  GLU*     3.8    31.3    -      -       +      +
     72A  PHE*     3.4    36.6    -      -       +      -
     73A  ASN*     4.4     9.0    -      -       -      +
    100A  GLY      2.9    15.9    +      -       -      +
    101A  GLY*     3.9     6.7    -      -       -      +
    102A  ALA      3.3     0.2    -      -       -      -
    103A  VAL*     1.3    73.2    -      -       -      +
    105A  ARG*     1.3    60.0    +      -       -      +
    107A  ALA*     4.3     1.8    -      -       -      -
    108A  ARG*     2.8    32.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  GLU      5.4     1.4    +      -       -      -
    101A  GLY*     3.0    30.7    +      -       -      +
    102A  ALA*     3.5    30.2    +      -       -      +
    104A  LEU*     1.3    76.0    -      -       -      +
    106A  GLN*     1.3    62.4    +      -       -      +
    108A  ARG*     3.6     5.2    +      -       -      +
    109A  ARG*     3.2    32.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  GLN*     4.8    11.2    +      -       -      +
    102A  ALA      3.2    10.9    +      -       -      +
    103A  VAL*     3.6    10.7    -      -       -      +
    105A  ARG*     1.3    79.8    -      -       -      +
    107A  ALA*     1.3    63.3    +      -       -      +
    109A  ARG*     3.2    12.2    +      -       +      +
    110A  GLN*     3.1    28.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  LEU*     3.8     7.7    -      -       +      +
     15A  THR*     3.3    31.9    -      -       +      +
     65A  PHE*     3.6    20.4    -      -       +      -
    103A  VAL*     2.9    17.2    +      -       +      +
    104A  LEU*     3.9     0.9    -      -       -      +
    105A  ARG      3.3     0.2    -      -       -      -
    106A  GLN*     1.3    74.9    -      -       -      +
    108A  ARG*     1.3    59.4    +      -       -      +
    110A  GLN*     3.0    10.6    +      -       -      +
    111A  ALA*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  PHE*     3.6    27.3    -      -       +      +
     66A  ASP*     3.0    32.5    +      -       -      -
     69A  GLU*     2.8    37.5    +      -       -      +
    104A  LEU      2.8    18.3    +      -       -      +
    105A  ARG*     3.8     7.0    -      -       -      +
    106A  GLN      3.3     0.2    -      -       -      -
    107A  ALA*     1.3    76.3    -      -       -      +
    109A  ARG*     1.3    57.1    +      -       +      +
    111A  ALA*     3.2     3.8    +      -       -      +
    112A  GLU*     2.9    47.4    +      -       +      +
    116A  ILE*     4.6    13.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  ARG*     3.2    19.0    +      -       +      +
    106A  GLN*     3.5    13.2    -      -       +      +
    107A  ALA      3.2     0.4    -      -       -      -
    108A  ARG*     1.3    78.7    -      -       +      +
    110A  GLN*     1.3    63.8    +      -       -      +
    112A  GLU*     3.5    20.2    +      -       -      +
    113A  LYS*     3.4    25.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  LEU*     3.9    24.2    -      -       +      +
    106A  GLN*     3.1    22.9    +      -       +      +
    107A  ALA*     3.0    11.0    +      -       -      +
    109A  ARG*     1.3    76.3    -      -       -      +
    111A  ALA*     1.3    60.9    +      -       -      +
    113A  LYS*     3.0    30.6    +      -       -      +
    114A  MET*     3.3    23.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  PHE*     4.3     2.7    -      -       +      -
     11A  LEU*     3.6    17.6    -      -       +      +
     65A  PHE*     4.1    16.6    -      -       +      -
    107A  ALA      2.9    12.1    +      -       -      +
    108A  ARG      3.2     8.5    +      -       -      +
    110A  GLN*     1.3    76.0    -      -       -      +
    112A  GLU*     1.3    63.0    +      -       -      +
    114A  MET*     3.1    20.3    +      -       -      +
    116A  ILE*     3.3    41.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 112 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  ARG*     2.9    39.8    +      -       +      +
    109A  ARG*     3.6    21.9    -      -       -      +
    110A  GLN      3.2     0.2    -      -       -      -
    111A  ALA*     1.3    79.0    -      -       -      +
    113A  LYS*     1.3    63.6    +      -       +      +
    114A  MET      3.3     6.8    +      -       -      +
    116A  ILE*     3.9    23.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 113 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  ARG*     3.4    13.9    +      -       -      +
    110A  GLN*     3.0    22.4    +      -       -      +
    112A  GLU*     1.3    80.6    -      -       +      +
    114A  MET*     1.3    62.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 114 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  GLN      5.2     7.2    -      -       -      +
      7A  PRO*     3.6    39.7    -      -       +      +
      8A  PHE*     3.9    19.5    -      -       +      -
     11A  LEU*     3.7    33.4    -      -       +      -
    110A  GLN*     3.5    20.2    -      -       +      +
    111A  ALA*     3.1     8.7    +      -       -      +
    112A  GLU      3.1     6.4    -      -       -      +
    113A  LYS*     1.3    84.0    -      -       +      +
    115A  GLY*     1.3    62.0    +      -       -      +
    116A  ILE*     3.8     2.5    -      -       +      +
----------------------------------------------------------
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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