Contacts of the helix formed by residues 108 - 129 (chain B) in PDB entry 4HHM


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 108 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334A  ARG*     2.9    49.5    +      -       -      +
    337A  GLN*     3.7     6.2    -      -       -      +
    365A  ALA      5.7     0.5    -      -       -      +
    368A  ARG*     2.8    29.5    +      -       -      +
    370A  MET*     3.9     9.1    -      -       -      +
    106B  ALA*     3.2     1.8    -      -       +      +
    107B  ASN*     1.3    75.4    -      -       -      +
    109B  ARG*     1.3    64.9    +      -       -      +
    110B  ASP*     3.3    16.6    -      -       -      +
    111B  VAL*     3.1    24.8    +      -       +      +
    112B  ARG*     3.2    15.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337A  GLN*     2.8    23.7    -      -       +      +
    340A  GLU*     4.5    15.5    -      -       -      +
    341A  PRO      3.0    23.5    +      -       -      -
    342A  THR*     3.4    12.7    +      -       -      +
    344A  ALA*     4.5     8.5    -      -       -      +
    345A  ASP*     4.5     6.3    +      -       -      +
    107B  ASN      3.4     2.4    +      -       -      -
    108B  ASP*     1.3    70.8    -      -       -      +
    110B  ASP*     1.3    64.1    +      -       -      +
    112B  ARG*     2.9    38.2    +      -       -      +
    113B  ARG*     3.0    52.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337A  GLN*     4.5     1.6    -      -       -      +
    355A  THR      5.6     1.8    -      -       -      +
    356A  ALA*     5.3     1.9    -      -       -      +
    360A  PHE*     3.2    31.2    -      -       +      -
    365A  ALA*     4.5     0.3    -      -       -      +
    368A  ARG*     3.0    26.9    +      -       -      -
    108B  ASP*     3.3    19.8    -      -       -      +
    109B  ARG*     1.3    77.3    -      -       -      +
    111B  VAL*     1.3    72.9    +      -       -      +
    113B  ARG*     3.5    11.0    +      -       -      +
    114B  TYR*     3.1    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360A  PHE*     4.4     7.2    -      -       +      -
    365A  ALA*     4.6     2.0    -      -       +      +
    368A  ARG*     4.5     6.5    -      -       -      +
     98B  VAL*     3.7    38.1    -      -       +      +
     99B  PHE*     3.9    13.0    -      -       +      -
    102B  GLY      3.8     7.0    -      -       -      +
    103B  ALA      4.4     0.4    -      -       -      +
    106B  ALA*     3.5    22.0    -      -       +      -
    108B  ASP*     3.4    20.6    -      -       +      +
    109B  ARG      3.1     0.4    -      -       -      -
    110B  ASP*     1.3    92.4    +      -       -      +
    112B  ARG*     1.3    66.2    +      -       -      +
    114B  TYR*     3.3     4.6    +      -       -      +
    115B  ALA*     2.9    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 112 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337A  GLN      2.9    15.2    +      -       -      -
    338A  LEU*     3.9     4.9    -      -       -      +
    340A  GLU      2.8    27.1    +      -       -      -
    342A  THR*     2.9    32.3    +      -       +      +
    103B  ALA      3.2    20.4    -      -       -      +
    104B  PHE*     3.1    24.1    -      -       -      +
    105B  THR*     4.3     0.2    -      -       -      +
    106B  ALA      2.8    44.8    +      -       -      +
    107B  ASN      2.9    21.2    +      -       -      -
    108B  ASP      3.6     2.0    -      -       -      +
    109B  ARG*     2.9    33.8    +      -       -      +
    111B  VAL*     1.3    76.6    -      -       -      +
    113B  ARG*     1.3    61.2    +      -       -      +
    115B  ALA*     3.3     5.0    +      -       -      +
    116B  LEU*     3.2    24.1    +      -       -      +
    157B  ARG*     3.5    15.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342A  THR*     2.9    41.5    +      -       +      +
    343A  ALA*     3.5     6.7    -      -       -      +
    345A  ASP*     3.0    31.9    +      -       -      -
    350A  LEU*     3.5    39.2    -      -       +      +
    353A  ASP*     3.0    28.4    +      -       -      +
    355A  THR*     5.6     0.6    +      -       -      -
    356A  ALA*     4.2    12.2    -      -       +      +
    109B  ARG*     3.0    54.8    +      -       -      +
    110B  ASP*     3.9     9.6    -      -       -      +
    112B  ARG*     1.3    75.9    -      -       -      +
    114B  TYR*     1.3    63.2    +      -       -      +
    116B  LEU*     3.2    14.3    +      -       -      +
    117B  ARG*     3.2    17.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356A  ALA      3.2    24.0    +      -       -      +
    357A  TYR*     3.9    32.8    -      +       -      -
    360A  PHE*     3.5    30.1    -      +       +      -
    362A  VAL*     3.9    20.4    -      -       +      +
     61B  PHE*     3.2    31.0    -      +       -      -
     98B  VAL*     4.4     5.8    -      -       +      -
     99B  PHE*     3.4    37.9    -      +       -      -
    110B  ASP      3.1    18.2    +      -       -      +
    111B  VAL      3.6     3.1    -      -       -      +
    113B  ARG*     1.3    76.1    -      -       -      +
    115B  ALA*     1.3    62.8    +      -       -      +
    117B  ARG*     3.1     4.3    +      -       -      +
    118B  LYS*     3.0    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  LEU*     4.0    12.8    -      -       +      +
     99B  PHE*     4.2     5.6    -      -       +      -
    103B  ALA*     3.8    35.2    -      -       +      +
    104B  PHE*     3.9    10.5    -      -       +      -
    111B  VAL      2.9    14.1    +      -       -      +
    112B  ARG      3.3    10.8    -      -       -      +
    114B  TYR*     1.3    77.1    -      -       -      +
    116B  LEU*     1.3    62.2    +      -       -      +
    118B  LYS*     3.5     2.5    +      -       -      +
    119B  THR*     3.1    27.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342A  THR*     3.8    24.0    -      -       +      -
    350A  LEU*     3.9    17.3    -      -       +      -
    104B  PHE*     3.6    25.1    -      -       +      -
    112B  ARG      3.2     6.3    +      -       -      +
    113B  ARG*     3.2     7.9    +      -       -      +
    115B  ALA*     1.3    78.3    -      -       -      +
    117B  ARG*     1.3    57.6    +      -       -      +
    119B  THR*     3.3     2.1    +      -       -      -
    120B  ILE*     2.8    40.7    +      -       +      +
    161B  ALA*     3.7    31.0    -      -       +      +
    164B  LEU*     3.4    31.4    -      -       +      -
    165B  LEU*     4.2    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350A  LEU*     3.3    30.9    +      -       +      -
    351A  LEU*     3.2    40.9    +      -       -      +
    353A  ASP      3.1    26.5    +      -       -      -
    356A  ALA*     3.7    14.4    -      -       +      +
    357A  TYR*     3.4    45.6    -      -       +      +
    358A  GLU*     4.0    10.9    +      -       -      -
    113B  ARG      3.2    11.6    +      -       -      +
    114B  TYR      3.1     5.9    +      -       -      +
    116B  LEU*     1.3    77.1    -      -       -      +
    118B  LYS*     1.3    57.7    +      -       -      +
    120B  ILE*     3.5     6.1    +      -       -      +
    121B  ARG*     3.0    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357A  TYR*     4.3    12.9    -      -       +      +
     55B  ASP*     2.7    32.9    +      -       -      +
     56B  ASP*     3.3    17.1    +      -       -      -
     61B  PHE*     3.9    28.9    -      -       -      -
     91B  THR*     4.3     2.2    -      -       +      -
     92B  ASN      3.1    24.1    +      -       -      +
     93B  LEU*     3.8    16.2    -      -       +      -
     96B  HIS*     6.1     0.2    -      -       -      -
     99B  PHE*     4.1     6.7    -      -       +      -
    114B  TYR*     3.0    38.9    +      -       +      +
    115B  ALA      3.7     5.4    -      -       -      +
    117B  ARG*     1.3    74.4    -      -       -      +
    119B  THR*     1.3    66.5    +      -       -      +
    121B  ARG*     3.4    11.0    +      -       -      +
    122B  ASN*     3.4    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  THR*     3.4    22.8    +      -       -      +
     93B  LEU*     3.3    24.0    -      -       +      +
    104B  PHE*     3.8     7.5    -      -       +      -
    115B  ALA      3.1    18.4    +      -       -      -
    116B  LEU      3.7     3.8    -      -       -      -
    118B  LYS*     1.3    76.3    -      -       -      +
    120B  ILE*     1.3    63.1    +      -       -      +
    122B  ASN      3.1    11.4    +      -       -      -
    123B  ILE*     3.1    14.0    +      -       +      +
    134B  TYR*     3.6    16.9    +      -       +      -
    165B  LEU*     3.9    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347A  LEU*     4.2    19.1    -      -       +      -
    350A  LEU*     5.2     2.7    -      -       +      -
    351A  LEU*     4.0    26.0    -      -       +      -
    116B  LEU*     2.8    33.4    +      -       +      +
    117B  ARG*     3.8     8.1    -      -       -      +
    119B  THR*     1.3    74.7    -      -       -      +
    121B  ARG*     1.3    61.9    +      -       -      +
    123B  ILE*     3.3    20.4    +      -       -      +
    124B  ASP*     3.5    11.1    +      -       -      +
    164B  LEU*     5.4     2.9    -      -       +      +
    165B  LEU*     3.5    22.7    -      -       +      -
    168B  TYR*     3.5    39.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357A  TYR*     3.3    41.7    +      -       +      +
     63B  ALA      4.7     7.9    +      -       -      -
     64B  SER*     5.8     0.2    -      -       -      +
     65B  ASP*     3.8    30.5    +      -       -      +
     68B  ARG*     3.3    59.4    +      -       -      +
    117B  ARG      3.0    18.2    +      -       -      +
    118B  LYS      3.9     4.5    -      -       -      +
    119B  THR      3.2     0.8    -      -       -      -
    120B  ILE*     1.3    79.1    -      -       -      +
    122B  ASN*     1.3    60.9    +      -       -      +
    123B  ILE      3.6     0.3    +      -       -      -
    124B  ASP*     3.7    12.9    +      -       +      +
    125B  LEU      3.6     9.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  PHE*     3.7     9.8    -      -       -      -
     55B  ASP*     3.4    31.0    -      -       +      +
     59B  ILE*     5.4     0.2    -      -       -      +
     68B  ARG*     4.6     3.5    +      -       -      +
     89B  ALA*     4.4     4.6    -      -       -      +
     90B  THR      2.9    23.2    +      -       -      +
    118B  LYS      3.4     8.5    +      -       -      +
    119B  THR      3.1     4.2    +      -       -      +
    121B  ARG*     1.3    76.6    -      -       -      +
    123B  ILE*     1.3    60.4    +      -       -      +
    124B  ASP      3.3     0.4    -      -       -      -
    125B  LEU*     3.6    24.7    -      -       -      +
    126B  ALA*     2.8    26.9    +      -       -      +
    134B  TYR*     2.8    31.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  THR*     3.1    16.8    +      -       +      +
    120B  ILE*     3.5    11.4    -      -       -      +
    121B  ARG      3.2     0.2    -      -       -      -
    122B  ASN*     1.3    77.5    -      -       -      +
    124B  ASP*     1.3    65.6    +      -       -      +
    126B  ALA*     3.2     7.5    +      -       -      +
    127B  VAL*     3.0    27.2    +      -       +      +
    134B  TYR*     4.0    18.6    -      -       +      -
    165B  LEU*     4.0    20.9    -      -       +      -
    168B  TYR*     4.4     7.9    -      -       +      -
    169B  VAL*     4.2    13.7    -      -       +      -
    174B  TYR*     4.1    23.3    -      -       +      -
    176B  ILE*     4.8     8.1    -      -       +      -
    178B  PHE*     3.7    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 124 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120B  ILE*     3.5    11.1    +      -       -      +
    121B  ARG*     3.7    13.8    +      -       +      +
    123B  ILE*     1.3    78.4    -      -       -      +
    125B  LEU*     1.3    55.8    +      -       -      +
    127B  VAL*     3.4     2.6    +      -       -      +
    128B  GLU*     2.9    29.7    +      -       -      +
    168B  TYR*     2.6    31.0    +      -       -      -
    174B  TYR*     2.9    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 125 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  PHE*     4.4    11.4    -      -       +      -
     58B  LEU*     4.8     2.2    -      -       +      -
     59B  ILE*     3.4    33.0    -      -       +      -
     68B  ARG*     4.0    18.8    -      -       -      +
     72B  VAL*     3.8    24.0    -      -       +      -
    121B  ARG      3.6     2.0    +      -       -      -
    122B  ASN*     3.5    25.3    +      -       -      +
    123B  ILE      3.2     0.4    -      -       -      -
    124B  ASP*     1.3    78.3    -      -       -      +
    126B  ALA*     1.3    67.2    +      -       -      +
    128B  GLU*     3.0    27.4    +      -       -      +
    129B  LEU*     2.8    42.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 126 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  PHE*     5.2     2.7    -      -       -      -
     89B  ALA*     3.8    25.6    -      -       +      -
    122B  ASN*     2.8    18.9    +      -       -      +
    123B  ILE*     3.3     7.0    -      -       -      +
    125B  LEU*     1.3    77.3    -      -       -      +
    127B  VAL*     1.3    57.2    +      -       -      +
    129B  LEU*     3.2     4.4    +      -       -      +
    130B  GLY      3.1     7.8    +      -       -      -
    131B  ALA*     2.9    34.4    +      -       +      +
    134B  TYR*     3.9    14.1    -      -       +      -
    176B  ILE*     4.1    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 127 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  ILE      3.0    13.8    +      -       -      +
    124B  ASP      3.7     6.5    -      -       -      +
    126B  ALA*     1.3    73.2    -      -       -      +
    128B  GLU*     1.3    67.2    +      -       -      +
    130B  GLY*     2.9    14.6    +      -       -      +
    131B  ALA      4.1     6.5    -      -       -      +
    174B  TYR*     3.8    50.5    -      -       +      -
    175B  ASP      5.5     3.6    -      -       -      +
    176B  ILE*     4.2    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 128 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  ARG*     5.7     1.6    +      -       -      -
     69B  GLU*     4.3    14.6    -      -       -      +
     72B  VAL*     4.5     5.5    -      -       -      +
     76B  ARG*     2.7    47.4    +      -       -      +
    124B  ASP      2.9    14.8    +      -       -      +
    125B  LEU*     3.0    30.7    +      -       +      +
    127B  VAL*     1.3    78.8    -      -       -      +
    129B  LEU*     1.3    59.0    +      -       -      +
    130B  GLY      3.6     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 129 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  PHE*     3.7    35.4    -      -       +      -
     58B  LEU*     4.3    12.1    -      -       +      -
     72B  VAL*     5.2     5.4    -      -       +      +
     75B  PHE*     4.6    10.5    -      -       +      -
     76B  ARG*     4.0    38.8    -      -       +      +
     79B  LEU*     4.8    12.8    -      -       +      +
     86B  VAL*     4.3    23.8    +      -       +      +
    125B  LEU*     2.8    34.6    +      -       +      +
    126B  ALA*     3.7     4.5    -      -       -      +
    128B  GLU*     1.3    76.0    -      -       -      +
    130B  GLY*     1.3    59.5    +      -       -      +
    131B  ALA      3.5     0.7    +      -       -      -
----------------------------------------------------------
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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