Contacts of the helix formed by residues 157 - 178 (chain B) in PDB entry 3PJF


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 ASN 157 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  TYR*     3.5    20.2    -      -       -      -
     99B  GLN      2.9    26.6    +      -       -      +
    101B  ASP      3.5    15.8    +      -       -      +
    102B  GLY      3.1    24.4    +      -       -      +
    104B  TYR*     3.4    39.7    +      -       +      +
    107B  ALA*     4.1     2.8    -      -       -      +
    108B  VAL*     6.0     0.7    -      -       +      -
    153B  ILE      4.6     0.9    -      -       -      +
    154B  PRO*     4.5     0.5    -      -       -      +
    155B  ASN      3.4    20.3    +      -       -      -
    156B  TYR*     1.3    77.1    -      -       -      +
    158B  VAL*     1.3    60.3    +      -       +      +
    160B  GLY*     2.9    22.3    +      -       -      -
    161B  LEU*     3.8     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  ALA*     4.8     3.1    -      -       +      -
     99B  GLN*     3.7    31.4    -      -       +      +
    100B  LEU*     4.9     1.3    -      -       +      -
    104B  TYR*     3.6     6.5    -      -       +      -
    108B  VAL*     3.9    19.3    -      -       +      -
    112B  GLY      4.4     2.5    -      -       -      +
    113B  PHE*     3.8    38.8    -      -       +      -
    116B  ALA*     3.9    17.5    -      -       +      -
    117B  HIS*     4.0     7.2    -      -       +      +
    156B  TYR      3.3     0.2    +      -       -      -
    157B  ASN*     1.3    76.3    -      -       +      +
    159B  MET*     1.3    66.6    +      -       -      +
    160B  GLY      2.9     2.5    -      -       -      -
    161B  LEU*     3.0    19.4    +      -       +      -
    162B  ALA*     3.0    12.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  VAL*     3.5    23.6    -      -       +      -
     94B  PHE      3.4    17.5    -      -       -      +
     95B  ALA*     3.5    18.6    -      -       +      +
    100B  LEU*     4.0     8.9    -      -       +      +
    116B  ALA*     4.3     3.8    -      -       +      -
    120B  SER*     3.3    29.2    -      -       -      +
    156B  TYR*     3.0    48.6    +      -       +      +
    158B  VAL*     1.3    81.3    -      -       -      +
    160B  GLY*     1.3    56.0    +      -       -      +
    162B  ALA*     3.3     4.9    +      -       -      -
    163B  LYS*     2.8    40.8    +      -       -      +
    504B  TCL      4.2    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168A  ALA*     4.0     1.8    -      -       -      +
    172A  TYR*     3.5    13.0    -      -       -      -
    148B  GLY      3.5    20.9    -      -       -      -
    149B  ALA*     3.4    11.3    -      -       -      -
    156B  TYR*     3.4     8.4    -      -       -      -
    157B  ASN      2.9    12.9    +      -       -      -
    159B  MET*     1.3    80.0    -      -       -      +
    161B  LEU*     1.3    55.8    +      -       -      +
    164B  ALA*     3.0    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  SER*     4.1     0.4    -      -       -      +
    165A  SER*     3.5    20.5    -      -       -      +
    168A  ALA*     3.9     8.1    -      -       -      -
    169A  ASN*     3.5    28.9    -      -       +      +
    172A  TYR*     3.8    17.9    -      -       +      -
    104B  TYR*     3.2    31.2    -      -       +      +
    113B  PHE*     3.7    26.9    -      -       +      -
    117B  HIS*     3.4    15.7    +      -       +      +
    157B  ASN      3.8    15.7    -      -       -      +
    158B  VAL*     3.0     9.9    +      -       +      +
    160B  GLY*     1.3    73.6    -      -       -      +
    162B  ALA*     1.3    60.0    +      -       -      +
    164B  ALA*     3.2     3.6    +      -       -      +
    165B  SER*     2.9    25.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  ALA*     3.7    32.3    -      -       +      +
    117B  HIS*     3.4    16.5    +      -       +      +
    120B  SER*     4.1     4.9    -      -       -      -
    121B  SER*     3.6     5.0    -      -       -      -
    158B  VAL      3.0    11.5    +      -       -      +
    159B  MET*     3.3    20.8    +      -       -      +
    161B  LEU*     1.3    78.2    -      -       -      +
    163B  LYS*     1.3    58.0    +      -       -      +
    165B  SER*     3.2     4.5    +      -       -      -
    166B  LEU*     2.8    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  ILE      4.8     2.8    +      -       -      -
     93B  VAL*     4.1    17.4    -      -       -      +
    120B  SER*     5.1     4.3    +      -       -      -
    144B  LEU      2.8    23.6    +      -       -      -
    145B  SER*     3.8    13.9    -      -       -      +
    146B  TYR      4.6     2.2    -      -       -      +
    149B  ALA*     3.5    21.1    -      -       +      +
    156B  TYR*     3.5    29.2    -      -       +      +
    159B  MET*     2.8    26.6    +      -       +      +
    160B  GLY      3.9     1.1    -      -       -      +
    162B  ALA*     1.3    73.5    -      -       -      +
    164B  ALA*     1.3    62.2    +      -       -      +
    166B  LEU*     3.2    20.3    +      -       +      +
    167B  GLU*     2.9    33.1    +      -       -      +
    503B  NAD      2.9    32.0    +      -       -      -
    504B  TCL      4.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164A  ALA*     3.5    34.8    -      -       +      +
    168A  ALA*     3.6    12.6    -      -       +      -
    171A  ARG*     4.7     1.6    -      -       -      +
    149B  ALA*     3.5    17.2    -      -       -      +
    160B  GLY      3.0    16.0    +      -       -      +
    161B  LEU      3.4     8.5    -      -       -      +
    163B  LYS*     1.3    77.1    -      -       -      +
    165B  SER*     1.3    62.3    +      -       -      +
    167B  GLU*     3.4     5.4    +      -       -      +
    168B  ALA      3.1    17.5    +      -       -      -
    171B  ARG*     4.8     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113A  PHE*     3.8     0.5    -      -       -      -
    117A  HIS*     2.9    31.9    +      -       -      -
    161A  LEU*     3.5    23.8    -      -       -      +
    164A  ALA*     4.4     1.3    -      -       -      +
    165A  SER*     4.3     1.3    -      -       -      +
    117B  HIS*     3.8    11.2    -      -       -      -
    121B  SER*     2.9    15.0    +      -       -      -
    161B  LEU      2.9    12.6    +      -       -      -
    162B  ALA      3.2     9.9    -      -       -      -
    164B  ALA*     1.3    77.6    -      -       -      +
    166B  LEU*     1.3    57.0    +      -       -      -
    168B  ALA*     3.2     1.4    +      -       -      +
    169B  ASN*     2.9    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  HIS*     4.5     1.3    -      -       +      +
    120B  SER      3.6    26.5    -      -       -      +
    121B  SER*     3.3    10.7    +      -       -      +
    124B  PHE*     3.8    29.4    -      -       +      -
    143B  THR*     3.5    29.8    -      -       +      +
    144B  LEU      3.4    26.7    -      -       -      +
    145B  SER*     4.7     3.8    -      -       -      -
    162B  ALA      2.8    14.5    +      -       -      +
    163B  LYS*     3.2    24.0    +      -       +      +
    165B  SER*     1.3    77.0    -      -       -      +
    167B  GLU*     1.3    58.6    +      -       +      +
    169B  ASN*     3.0     6.9    +      -       +      +
    170B  VAL*     3.0    26.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  SER*     2.5    34.9    +      -       -      +
    146B  TYR      3.9     3.8    -      -       -      +
    149B  ALA*     3.4    18.4    -      -       -      +
    150B  GLU*     4.1    20.1    -      -       -      +
    163B  LYS      2.9    16.4    +      -       -      +
    164B  ALA*     3.9     5.2    -      -       -      +
    166B  LEU*     1.3    75.7    -      -       +      +
    168B  ALA*     1.3    61.8    +      -       -      +
    170B  VAL*     3.2    19.3    +      -       -      +
    171B  ARG*     3.3    28.4    +      -       -      +
    186B  ALA*     5.3     2.2    -      -       +      -
    188B  SER*     4.6     2.6    +      -       -      -
    244B  VAL*     3.9    36.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  ALA      4.2     2.9    -      -       -      +
    160A  GLY      4.1     3.6    -      -       -      +
    161A  LEU*     3.8    16.4    -      -       +      +
    164A  ALA*     3.6    28.9    -      -       +      -
    164B  ALA      3.1     5.3    +      -       -      -
    165B  SER      3.5     8.3    -      -       -      +
    167B  GLU*     1.3    74.4    -      -       -      +
    169B  ASN*     1.3    66.4    +      -       -      +
    171B  ARG*     3.1    21.2    +      -       -      +
    172B  TYR*     3.0    32.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  TYR*     2.8    22.7    +      -       -      -
    161A  LEU*     3.4    20.1    -      -       +      +
    121B  SER*     2.9    32.5    +      -       -      -
    122B  TYR*     4.4     0.4    -      -       -      +
    124B  PHE*     4.2     2.4    -      -       +      +
    125B  VAL*     3.6    19.5    -      -       -      +
    165B  SER      2.9    13.5    +      -       -      +
    166B  LEU*     3.0    17.5    -      -       +      +
    168B  ALA*     1.3    76.9    -      -       -      +
    170B  VAL*     1.3    54.5    +      -       -      +
    172B  TYR*     4.7     0.2    -      -       -      -
    173B  MET*     2.8    54.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124B  PHE*     3.9     9.0    -      -       +      -
    143B  THR*     3.6    29.4    -      -       +      -
    166B  LEU      3.0    18.1    +      -       -      +
    167B  GLU*     3.3    12.6    -      -       -      +
    168B  ALA      3.2     0.2    -      -       -      -
    169B  ASN*     1.3    77.1    -      -       -      +
    171B  ARG*     1.3    56.6    +      -       -      +
    173B  MET*     3.8     1.2    -      -       -      +
    174B  ALA*     2.9    31.0    +      -       -      +
    184B  VAL*     3.6    28.5    -      -       -      +
    185B  ASN*     3.7    15.0    -      -       -      +
    186B  ALA*     3.7    13.2    -      -       +      +
    242B  GLY*     3.9    15.3    -      -       -      +
    243B  GLU      4.2     2.7    -      -       -      +
    244B  VAL*     5.2     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  ALA      3.2    22.8    +      -       -      -
    150A  GLU*     3.0    31.3    +      -       -      +
    151A  ARG*     4.3     4.8    -      -       -      +
    152A  ALA*     3.4    16.3    -      -       +      +
    164A  ALA*     4.9     1.6    -      -       -      +
    164B  ALA      4.8     2.0    +      -       -      -
    167B  GLU*     3.4    28.0    +      -       -      +
    168B  ALA*     3.1    24.5    +      -       -      +
    170B  VAL*     1.3    75.4    -      -       +      +
    172B  TYR*     1.3    61.8    +      -       +      +
    174B  ALA*     3.4     6.2    +      -       -      +
    175B  ASN*     2.9    29.8    +      -       -      +
    242B  GLY*     3.6    20.8    +      -       -      +
    244B  VAL*     4.4    10.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  TYR*     3.6    29.2    -      +       +      +
    148A  GLY*     2.6    39.1    +      -       -      -
    149A  ALA      5.6     0.2    -      -       -      -
    151A  ARG      3.1    16.2    +      -       -      -
    152A  ALA*     3.9     9.9    -      -       +      -
    153A  ILE      3.4    30.0    +      -       -      -
    156A  TYR*     3.6     5.7    -      -       -      +
    157A  ASN*     3.6    30.5    -      -       -      -
    160A  GLY*     3.5    16.5    -      -       -      -
    161A  LEU*     3.7    13.5    -      -       +      -
    168B  ALA*     3.0    30.5    +      -       +      +
    169B  ASN      4.0     0.7    -      -       -      +
    171B  ARG*     1.3    75.3    -      -       +      +
    173B  MET*     1.3    61.5    +      -       -      +
    175B  ASN*     3.4     4.0    +      -       +      +
    176B  ALA*     3.0    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  TYR*     3.9    12.6    -      -       +      -
    105A  VAL*     4.3     7.9    -      -       +      -
    124B  PHE*     3.5    46.2    -      -       +      +
    125B  VAL*     3.8    12.3    -      -       +      -
    128B  ALA*     3.7    28.9    -      -       +      -
    141B  LEU*     3.8    16.2    -      -       +      -
    169B  ASN*     2.8    43.1    +      -       -      +
    170B  VAL      3.8     2.9    -      -       -      +
    172B  TYR*     1.3    75.2    -      -       -      +
    174B  ALA*     1.3    60.1    +      -       -      +
    176B  ALA      3.2     0.7    +      -       -      -
    177B  MET*     2.8    37.5    +      -       -      +
    184B  VAL*     3.9    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170B  VAL      2.9    18.8    +      -       -      +
    171B  ARG      3.7     3.8    -      -       -      +
    173B  MET*     1.3    76.4    -      -       -      +
    175B  ASN*     1.3    58.2    +      -       -      +
    177B  MET      4.8     0.2    -      -       -      +
    178B  GLY*     3.0    29.4    +      -       -      +
    182B  VAL      4.5     0.8    -      -       -      +
    184B  VAL*     3.8    13.6    -      -       -      +
    241B  SER*     3.5    19.0    +      -       -      +
    242B  GLY*     3.4    26.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  ALA*     3.6    30.3    +      -       +      +
    153A  ILE      5.2     0.4    -      -       -      -
    154A  PRO*     4.6    19.4    -      -       -      +
    171B  ARG      2.9    18.7    +      -       -      +
    172B  TYR*     3.8     4.6    -      -       +      +
    173B  MET      3.2     0.2    -      -       -      -
    174B  ALA*     1.3    78.1    -      -       -      +
    176B  ALA*     1.3    60.6    +      -       -      +
    179B  PRO*     3.6    16.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  ASP*     3.5    28.6    -      -       -      +
    104A  TYR*     4.2    11.4    -      -       +      +
    105A  VAL*     4.2    14.6    -      -       +      +
    132B  ARG*     3.4    12.5    +      -       -      -
    172B  TYR      3.0    17.1    +      -       -      +
    173B  MET      3.2     1.8    +      -       -      +
    175B  ASN*     1.3    79.5    -      -       -      +
    177B  MET*     1.3    61.2    +      -       -      +
    178B  GLY      3.5     0.2    -      -       -      -
    179B  PRO*     3.5    11.4    -      -       -      +
    180B  GLU*     3.9     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  VAL*     3.9    24.5    -      -       +      -
    128B  ALA*     4.2    19.3    -      -       +      +
    132B  ARG*     4.0    30.1    -      -       +      +
    135B  LEU*     3.8    28.5    -      -       +      -
    141B  LEU*     4.1    18.2    -      -       +      -
    173B  MET*     2.8    23.6    +      -       -      +
    176B  ALA*     1.3    72.6    -      -       -      +
    178B  GLY*     1.3    65.0    +      -       -      +
    179B  PRO*     3.3     2.9    -      -       -      -
    180B  GLU*     3.0    32.3    +      -       -      +
    182B  VAL*     3.3    26.8    +      -       +      +
    184B  VAL*     4.4     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  ALA      3.0    17.5    +      -       -      -
    177B  MET*     1.3    77.1    -      -       -      +
    179B  PRO*     1.3    57.3    -      -       -      +
    181B  GLY*     2.8    26.2    +      -       -      -
    182B  VAL      3.3    14.0    +      -       -      -
    241B  SER*     5.8     0.9    -      -       -      -
----------------------------------------------------------
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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