Contacts of the helix formed by residues 92 - 113 (chain A) in PDB entry 2FBW


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 ASP 92 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  GLY*     1.3    69.7    -      -       -      -
     93A  GLN*     1.3    60.0    +      -       -      +
     94A  ASP*     3.3    15.7    -      -       -      +
     95A  ALA*     3.1     5.0    +      -       +      +
     96A  ILE*     3.1    26.4    +      -       -      +
    245A  GLN*     4.7     0.2    +      -       -      -
    372A  THR      5.0     0.5    -      -       -      +
    401A  ALA      3.4     7.1    -      -       -      +
    402A  SER*     2.8    37.3    +      -       -      +
    582A  HIS*     2.9    29.8    +      -       -      -
    599A  ARG*     4.3    10.3    +      -       -      -
    600A  PRO      4.8     0.2    -      -       -      +
    601A  VAL*     3.7     1.4    -      -       -      +
    602A  ILE*     3.2    36.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  PHE*     3.6    17.2    -      -       +      -
     84A  VAL*     3.7    25.9    -      -       +      +
     89A  TRP*     4.0     7.9    -      -       -      +
     91A  GLY      3.8    10.4    +      -       -      +
     92A  ASP*     1.3    69.4    -      -       -      +
     94A  ASP*     1.3    58.8    +      -       -      +
     96A  ILE*     3.9     7.4    -      -       +      -
     97A  HIS*     3.0    28.6    +      -       -      +
    602A  ILE      2.8    14.8    +      -       -      +
    603A  ASP*     3.5    31.8    +      -       -      +
    604A  ARG      3.5     5.4    -      -       -      +
    605A  THR*     4.0     3.1    -      -       +      -
    613A  SER*     3.4    12.1    +      -       -      -
    614A  VAL*     3.0    45.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  ASP*     3.4    20.4    -      -       -      +
     93A  GLN*     1.3    73.1    -      -       -      +
     95A  ALA*     1.3    65.6    +      -       -      +
     97A  HIS*     3.4     3.6    +      -       -      +
     98A  TYR*     3.0    22.5    +      -       -      +
    373A  ASN*     6.0     0.2    -      -       -      +
    374A  TYR*     3.7    24.7    +      -       +      +
    401A  ALA      5.3     0.3    -      -       -      +
    602A  ILE*     3.7    27.4    -      -       +      +
    604A  ARG*     3.1    20.9    +      -       +      +
    605A  THR*     4.1     9.0    -      -       -      +
    606A  LEU*     3.5    30.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  ASP*     3.1     7.5    +      -       +      +
     94A  ASP*     1.3    83.3    +      -       -      +
     96A  ILE*     1.3    59.2    +      -       -      +
     98A  TYR*     3.2     5.0    +      -       -      +
     99A  MET*     2.9    30.0    +      -       -      +
    374A  TYR*     3.7    21.8    -      -       +      -
    401A  ALA*     4.0    26.9    -      -       +      +
    402A  SER      4.6     0.9    -      -       -      +
    403A  VAL*     3.7    17.2    -      -       +      +
    420A  PHE*     3.8     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  PHE*     3.6    24.9    -      -       +      +
     83A  THR*     3.7    26.2    -      -       +      +
     84A  VAL*     4.0    25.6    -      -       +      +
     87A  SER*     4.5     0.2    -      -       -      +
     91A  GLY*     4.0    22.0    -      -       -      +
     92A  ASP      3.1    18.3    +      -       -      +
     93A  GLN*     4.1     4.5    -      -       +      +
     95A  ALA*     1.3    72.8    -      -       -      +
     97A  HIS*     1.3    66.6    +      -       -      +
     99A  MET*     4.4     2.2    -      -       +      +
    100A  THR*     2.9    33.4    +      -       +      +
    403A  VAL*     3.5    36.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76A  TRP*     3.5    19.4    -      +       -      -
     80A  PHE*     3.6    16.3    -      -       +      -
     93A  GLN      3.0    20.2    +      -       -      +
     94A  ASP      3.5     5.8    -      -       -      +
     96A  ILE*     1.3    75.6    -      -       -      +
     98A  TYR*     1.3    64.1    +      -       -      +
    100A  THR*     3.6     1.3    +      -       -      -
    101A  GLU*     3.0    45.9    +      -       -      +
    605A  THR*     3.4     7.7    -      -       -      -
    606A  LEU*     3.0    31.7    +      -       +      +
    607A  ASN*     3.5    28.0    -      -       +      -
    610A  ASP*     4.7     3.4    +      -       -      -
    611A  CYS*     3.8    18.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  ASP      3.0    13.8    +      -       -      +
     95A  ALA*     3.2     9.6    +      -       -      +
     97A  HIS*     1.3    77.3    -      -       -      +
     99A  MET*     1.3    60.9    +      -       -      +
    101A  GLU*     4.1     2.4    -      -       -      -
    102A  GLN*     2.9    59.9    +      -       +      +
    374A  TYR*     4.5    18.4    -      +       +      -
    419A  VAL*     3.5    29.7    +      -       +      -
    420A  PHE*     4.1    12.8    -      +       +      -
    422A  ARG*     4.6     4.5    +      -       -      +
    423A  ALA*     4.0    22.8    -      -       +      +
    426A  LEU*     4.1    21.1    -      -       -      +
    606A  LEU*     3.8    19.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  THR*     4.4     6.1    -      -       +      -
     95A  ALA      2.9    17.2    +      -       -      +
     96A  ILE*     3.2     3.1    +      -       -      +
     98A  TYR*     1.3    77.3    -      -       -      +
    100A  THR*     1.3    76.3    +      -       +      +
    102A  GLN*     3.4     2.8    +      -       -      +
    103A  ALA*     3.2    21.7    +      -       -      +
    403A  VAL*     4.0    26.5    -      -       +      -
    404A  HIS*     4.9     0.2    -      -       +      -
    412A  ASN*     3.9    33.2    -      -       +      +
    415A  LEU*     3.8    20.3    -      -       +      +
    416A  ASP*     3.8    31.9    -      -       -      -
    419A  VAL*     4.1    17.3    -      -       +      +
    420A  PHE*     3.9    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  ALA      5.7     0.2    +      -       -      -
     76A  TRP*     3.6    22.2    -      -       -      +
     79A  HIS*     3.6    38.0    +      -       +      +
     80A  PHE*     3.4    40.0    -      -       -      +
     83A  THR*     3.8     9.0    -      -       -      +
     96A  ILE*     2.9    24.1    +      -       +      +
     97A  HIS      3.6     1.0    +      -       -      -
     99A  MET*     1.3    84.1    -      -       +      +
    101A  GLU*     1.3    65.8    +      -       -      +
    103A  ALA*     3.3    15.8    +      -       -      +
    104A  PRO*     3.7     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76A  TRP*     3.3    50.4    +      -       +      +
     77A  ARG*     5.5     0.2    +      -       -      -
     97A  HIS*     3.0    36.9    +      -       -      +
     98A  TYR*     4.1     2.7    -      -       -      +
    100A  THR*     1.3    80.5    +      -       -      +
    102A  GLN*     1.3    74.5    +      -       -      +
    103A  ALA      3.5     0.5    +      -       -      -
    104A  PRO*     3.6     9.5    -      -       -      +
    105A  ALA*     5.3     0.7    +      -       -      +
    606A  LEU*     5.5     1.9    -      -       -      +
    610A  ASP*     3.7     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  TYR*     2.9    61.3    +      -       +      +
     99A  MET      4.1     3.1    -      -       -      +
    101A  GLU*     1.3    93.5    +      -       -      +
    103A  ALA*     1.3    64.2    +      -       -      +
    104A  PRO*     3.5     1.1    -      -       -      -
    105A  ALA*     3.3    15.9    +      -       -      +
    106A  ALA*     3.0    21.4    +      -       +      +
    419A  VAL*     4.3    15.0    -      -       +      -
    422A  ARG*     4.8    10.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  ASN      3.6    22.2    -      -       -      +
     66A  ALA*     3.7     8.5    -      -       -      -
     67A  ALA      4.8     0.2    -      -       -      +
     79A  HIS*     4.5     2.7    -      -       -      +
     99A  MET      3.2     7.8    +      -       -      +
    100A  THR*     3.3    11.4    +      -       -      +
    102A  GLN*     1.3    77.6    -      -       -      +
    104A  PRO*     1.3    72.2    -      -       +      +
    106A  ALA*     3.1     2.3    +      -       -      +
    107A  VAL*     3.1    27.0    +      -       -      +
    415A  LEU*     3.6    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  ALA*     3.8     2.9    -      -       +      -
     67A  ALA*     4.1    28.5    -      -       +      +
     68A  LEU*     3.8    23.2    -      -       +      +
     76A  TRP*     5.0     7.9    -      -       +      -
    100A  THR      3.7     5.8    -      -       -      +
    101A  GLU      3.6    13.7    -      -       -      +
    102A  GLN      3.6     0.4    -      -       -      -
    103A  ALA*     1.3    95.6    -      -       +      +
    105A  ALA*     1.3    63.2    +      -       -      +
    107A  VAL*     3.2     1.9    +      -       -      +
    108A  ILE*     3.0    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  GLU      5.3     0.6    +      -       -      +
    102A  GLN*     3.3    19.1    +      -       -      +
    104A  PRO*     1.3    78.9    -      -       -      +
    106A  ALA*     1.3    63.5    +      -       -      +
    108A  ILE*     3.5     9.6    +      -       -      +
    109A  GLU*     3.0    22.9    +      -       -      +
    138B  GLY*     4.6     9.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102A  GLN*     3.0    17.6    +      -       +      +
    103A  ALA*     3.1     6.3    +      -       -      +
    105A  ALA*     1.3    77.9    -      -       -      +
    107A  VAL*     1.3    62.8    +      -       +      +
    109A  GLU*     3.3    13.5    -      -       -      +
    110A  LEU*     3.2    25.6    +      -       -      +
    415A  LEU*     4.5     2.7    -      -       +      -
    418A  VAL*     4.0    18.8    -      -       +      +
    419A  VAL*     4.0    23.3    -      -       +      +
    422A  ARG*     6.6     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64A  ILE*     4.2    29.6    -      -       +      -
     65A  ASN      4.3     1.1    -      -       -      +
     66A  ALA*     3.5    19.7    -      -       +      -
     68A  LEU*     4.3     3.6    -      -       +      -
    103A  ALA      3.1    15.4    +      -       -      +
    104A  PRO      4.0     2.5    -      -       -      +
    106A  ALA*     1.3    74.6    -      -       +      +
    108A  ILE*     1.3    67.7    +      -       -      +
    110A  LEU*     3.1     8.4    +      -       -      +
    111A  GLU*     2.9    21.5    +      -       -      +
    117A  PHE*     3.7    27.1    -      -       +      -
    125A  ILE*     4.2    10.5    -      -       +      -
    147A  CYS*     3.9    19.7    -      -       +      -
    415A  LEU*     5.2     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  LEU*     4.1    20.4    -      -       +      -
    104A  PRO*     3.0    23.3    +      -       +      +
    105A  ALA*     3.8     6.5    -      -       -      +
    107A  VAL*     1.3    76.0    -      -       -      +
    109A  GLU*     1.3    56.9    +      -       -      +
    111A  GLU*     3.2     6.3    +      -       -      -
    112A  ASN*     2.8    31.1    +      -       -      +
    125A  ILE*     5.3     1.6    -      -       +      -
    138B  GLY*     3.5    25.1    -      -       -      +
    139B  LYS      4.1    13.9    -      -       -      +
    140B  GLU*     3.6    32.5    -      -       -      +
    141B  GLN*     3.9    16.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  ARG*     2.8    39.9    +      -       -      -
    105A  ALA      3.0    15.0    +      -       -      +
    106A  ALA*     3.3    16.4    -      -       -      +
    108A  ILE*     1.3    76.7    -      -       -      +
    110A  LEU*     1.3    64.5    +      -       -      +
    112A  ASN*     3.2     3.1    +      -       -      +
    113A  TYR*     2.9    58.8    +      -       +      +
    418A  VAL*     5.4     4.5    -      -       -      +
    422A  ARG*     3.9    14.5    +      -       -      -
    137B  GLN*     5.9     2.9    -      -       -      +
    138B  GLY*     4.5    16.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  ARG*     6.3     0.2    -      -       -      -
     64A  ILE*     4.1    17.9    -      -       +      -
    106A  ALA      3.2    13.4    +      -       -      +
    107A  VAL*     3.1    11.5    +      -       -      +
    109A  GLU*     1.3    80.5    -      -       +      +
    111A  GLU*     1.3    63.1    +      -       -      +
    113A  TYR*     3.1    21.8    +      -       +      +
    115A  MET*     3.2    37.7    +      -       +      +
    117A  PHE*     4.4     4.9    -      -       +      -
    157A  LEU*     3.7    32.1    -      -       +      +
    160A  THR*     4.1     3.8    -      -       +      +
    161A  LEU*     3.9    33.7    -      -       +      -
    418A  VAL*     4.4    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  VAL      2.9    14.4    +      -       -      +
    108A  ILE*     3.8     3.4    -      -       -      +
    110A  LEU*     1.3    76.5    -      -       -      +
    112A  ASN*     1.3    85.4    +      -       -      +
    114A  GLY*     2.7    21.7    +      -       -      -
    115A  MET      4.2     2.9    -      -       -      -
    117A  PHE*     3.7    27.1    -      -       +      -
    119A  ARG*     2.9    32.8    +      -       -      +
    125A  ILE*     4.0    17.3    -      -       +      -
    129B  LEU*     4.3     2.3    -      -       -      +
    141B  GLN*     3.7     3.0    -      -       -      -
    142B  TYR*     3.0    23.8    +      -       -      +
    195B  ARG*     3.0    23.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 112 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  ILE*     2.8    23.8    +      -       -      +
    109A  GLU*     3.6     4.3    -      -       -      +
    111A  GLU*     1.3    92.7    +      -       -      +
    113A  TYR*     1.3    62.1    +      -       +      +
    114A  GLY      3.2     0.4    -      -       -      -
    164A  ARG*     5.1     3.1    +      -       -      -
    129B  LEU*     3.3    16.2    -      -       -      +
    136B  LYS      4.0     1.0    -      -       -      +
    137B  GLN*     3.5    12.9    -      -       +      +
    138B  GLY*     2.8    30.5    +      -       -      +
    139B  LYS      4.0     1.4    +      -       -      -
    140B  GLU      3.1    25.5    +      -       -      +
    141B  GLN*     4.2     0.2    -      -       -      +
    142B  TYR*     3.5    34.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 113 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  ARG*     3.8     2.9    +      -       -      -
     35A  PHE*     3.4    36.2    -      +       -      -
     39A  GLU*     4.8     2.9    +      -       -      -
    109A  GLU*     2.9    56.4    +      -       +      -
    110A  LEU*     3.2    20.0    -      -       +      +
    111A  GLU      3.1     0.4    -      -       -      -
    112A  ASN*     1.3    77.8    -      -       +      +
    114A  GLY*     1.3    58.1    +      -       -      +
    160A  THR*     3.4    20.2    -      -       +      +
    161A  LEU*     3.9    20.0    -      -       +      -
    164A  ARG*     3.4    53.2    +      -       +      +
    128B  TYR*     5.0     2.6    -      -       -      +
    129B  LEU*     3.4    21.1    +      -       -      +
    137B  GLN*     4.8     8.0    +      -       +      -
    190B  TRP*     4.2     2.9    -      -       -      -
----------------------------------------------------------
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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