Contacts of the helix formed by residues 153 - 176 (chain B) in PDB entry 3RKR


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 GLY 153 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  TRP*     4.0     8.5    -      -       -      -
     96B  PHE*     3.9    21.5    -      -       -      -
    150B  VAL*     2.9    15.8    +      -       -      +
    151B  ALA      3.1     0.6    -      -       -      -
    152B  ASP*     1.3    78.4    -      -       -      +
    154B  ALA*     1.3    52.6    +      -       -      +
    155B  ALA      3.4     2.0    -      -       -      -
    156B  TYR*     3.3     5.3    +      -       -      +
    157B  THR*     2.8    40.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 154 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  TRP*     6.0     2.0    -      -       -      -
    100B  LEU*     3.9    26.2    -      -       +      -
    152B  ASP      3.8     1.2    -      -       -      -
    153B  GLY*     1.3    76.6    -      -       -      +
    155B  ALA*     1.3    58.9    +      -       -      +
    157B  THR*     3.2     3.3    +      -       -      -
    158B  ALA*     2.9    28.9    +      -       -      +
    166C  LEU*     3.7    19.1    -      -       +      +
    169C  SER*     3.5    26.7    -      -       -      -
    170C  ALA      4.3     1.3    -      -       -      +
    173C  GLU*     3.8    13.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 155 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  TRP*     5.9     1.7    -      -       +      -
    100B  LEU*     4.4     2.3    -      -       +      +
    103B  MET*     3.5    39.0    -      -       +      -
    108B  TRP*     3.7    21.8    -      -       +      -
    111B  LEU*     3.6    14.8    -      -       +      +
    112B  ILE*     4.5     2.6    -      -       +      +
    154B  ALA*     1.3    78.3    -      -       -      +
    156B  TYR*     1.3    57.4    +      -       -      +
    158B  ALA*     3.2     3.0    +      -       -      +
    159B  SER*     2.9    24.9    +      -       -      -
    166C  LEU*     4.0    10.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  GLY      6.1     0.2    -      -       -      -
     93B  VAL      3.4    27.4    -      -       -      -
     94B  GLY*     3.9    10.5    -      -       -      -
     95B  TRP      4.3     5.1    +      -       -      +
     96B  PHE*     3.8    32.1    -      +       +      -
    111B  LEU*     3.9    13.0    -      -       +      +
    115B  ASN*     3.8     5.2    -      -       -      -
    143B  SER*     2.3    37.8    +      -       -      -
    144B  LEU*     3.8    20.9    -      -       +      -
    150B  VAL*     5.2     3.8    -      -       +      -
    153B  GLY      3.5    12.1    -      -       -      +
    155B  ALA*     1.3    79.3    -      -       -      +
    157B  THR*     1.3    63.8    +      -       -      +
    159B  SER*     2.7    22.1    +      -       -      -
    160B  LYS*     3.0    31.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  LEU*     3.9    11.4    -      -       +      -
    149B  PRO*     4.0    10.1    -      -       +      -
    150B  VAL*     3.3    27.9    +      -       -      +
    153B  GLY      2.8    26.3    +      -       -      -
    154B  ALA      3.6     2.0    -      -       -      -
    156B  TYR*     1.3    71.3    -      -       -      +
    158B  ALA*     1.3    64.6    +      -       -      +
    160B  LYS*     3.1     2.4    +      -       -      -
    161B  TRP*     2.9    61.5    +      -       +      +
    165C  GLY*     3.7    15.9    -      -       -      +
    169C  SER*     3.4    11.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  TRP*     5.0     2.9    -      -       +      -
    112B  ILE*     5.3     1.3    -      -       +      -
    116B  LEU*     5.1     1.7    -      -       -      +
    154B  ALA      2.9    13.7    +      -       -      +
    155B  ALA*     3.2     8.9    +      -       -      +
    157B  THR*     1.3    76.2    -      -       -      +
    159B  SER*     1.3    56.9    +      -       -      +
    162B  GLY*     2.8    29.6    +      -       -      -
    116C  LEU*     4.3    12.7    -      -       +      +
    162C  GLY*     3.3    34.2    -      -       -      +
    165C  GLY*     4.5     1.3    -      -       -      -
    166C  LEU*     3.8    20.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111B  LEU*     3.6     9.3    -      -       -      +
    112B  ILE*     4.1    13.2    -      -       -      +
    115B  ASN*     3.1    43.8    +      -       -      +
    116B  LEU*     3.9    13.8    -      -       -      +
    155B  ALA      2.9    13.9    +      -       -      -
    156B  TYR      2.7    17.7    +      -       -      -
    158B  ALA*     1.3    77.1    -      -       -      +
    160B  LYS*     1.3    60.8    +      -       -      +
    162B  GLY      3.8     0.2    -      -       -      -
    163B  LEU*     2.9    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  ASN      5.9     0.2    +      -       -      -
     91B  ALA      5.2     1.8    +      -       -      -
     92B  GLY*     4.6    10.5    -      -       -      -
    115B  ASN*     3.8    30.6    +      -       -      +
    141B  ILE      4.6    10.5    +      -       -      -
    142B  SER*     4.0     8.9    +      -       -      +
    143B  SER*     3.8    25.2    -      -       -      +
    144B  LEU*     3.9    21.8    -      -       +      -
    156B  TYR*     3.0    49.8    +      -       +      +
    157B  THR      3.8     2.9    -      -       -      +
    159B  SER*     1.3    77.6    +      -       -      +
    161B  TRP*     1.3    67.3    +      -       -      +
    162B  GLY      3.2     0.9    -      -       -      -
    163B  LEU*     3.3    11.6    +      -       +      +
    164B  ASN*     3.0    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  LEU*     4.3    14.1    -      -       +      +
    146B  GLY*     3.3    47.5    -      -       -      +
    147B  LYS      3.6    25.1    -      -       -      +
    148B  ASN      3.7     3.7    +      -       -      -
    149B  PRO*     3.8    20.0    -      -       +      -
    157B  THR*     2.9    39.7    +      -       +      +
    158B  ALA      4.2     1.1    -      -       -      +
    160B  LYS*     1.3    73.7    -      -       -      +
    162B  GLY*     1.3    62.8    +      -       -      +
    164B  ASN*     3.3    10.6    +      -       -      +
    165B  GLY      3.1    17.7    +      -       -      -
    242B  SO4      4.5     1.8    +      -       -      -
    146C  GLY*     6.5     1.1    -      -       -      -
    161C  TRP*     3.5    33.8    -      -       +      +
    162C  GLY*     4.5     0.4    -      -       -      -
    164C  ASN*     3.9    15.0    -      -       +      -
    165C  GLY*     3.3    31.4    -      -       -      -
    168C  THR*     4.3     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     3.6    13.2    -      -       -      -
    158B  ALA      2.8    18.8    +      -       -      -
    159B  SER      3.9     1.1    -      -       -      -
    161B  TRP*     1.3    78.6    -      -       -      +
    163B  LEU*     1.3    50.7    +      -       -      +
    165B  GLY*     3.0     2.1    +      -       -      -
    166B  LEU*     2.8    35.7    +      -       -      +
    158C  ALA*     3.4    28.4    -      -       -      +
    162C  GLY*     4.0     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  ASN*     5.6     2.9    -      -       +      +
    115B  ASN      4.3     9.2    -      -       -      +
    116B  LEU*     3.5     6.9    -      -       +      +
    119B  PRO*     3.8    35.4    -      -       +      -
    140B  ASN*     4.3    11.9    -      -       +      +
    141B  ILE      3.9    23.1    -      -       -      +
    142B  SER*     4.3    16.8    -      -       -      +
    159B  SER      2.9    20.9    +      -       -      +
    160B  LYS*     3.3    16.5    +      -       +      +
    162B  GLY*     1.3    72.8    -      -       -      +
    164B  ASN*     1.4    64.8    +      -       -      +
    166B  LEU*     3.2     6.5    +      -       +      +
    167B  MET*     3.0    41.8    +      -       +      +
    183B  LEU*     4.8     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142B  SER*     2.9    23.4    +      -       -      -
    144B  LEU      2.9    22.2    +      -       -      -
    145B  ALA*     3.6    19.6    +      -       -      +
    146B  GLY*     3.7     7.1    -      -       -      +
    160B  LYS      3.0    10.8    +      -       -      +
    161B  TRP*     3.5     8.7    -      -       -      +
    163B  LEU*     1.4    76.1    -      -       -      +
    165B  GLY*     1.3    61.1    +      -       -      +
    168B  THR*     2.8    34.2    +      -       +      +
    183B  LEU*     3.4    31.4    -      -       +      +
    230B  GLU*     5.7     0.6    +      -       -      -
    161C  TRP*     3.9    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161B  TRP      3.1     7.7    +      -       -      -
    162B  GLY      3.0     5.6    +      -       -      -
    164B  ASN*     1.3    74.0    -      -       -      +
    166B  LEU*     1.3    64.9    +      -       -      +
    168B  THR*     3.8     1.8    +      -       -      -
    169B  SER*     2.8    32.1    +      -       -      -
    157C  THR*     3.7    13.5    -      -       -      +
    158C  ALA*     4.4     2.2    -      -       -      -
    161C  TRP*     3.3    27.9    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    116B  LEU*     3.8    27.6    -      -       +      +
    120B  TYR*     3.9    14.6    -      -       +      +
    162B  GLY      2.8    20.0    +      -       -      +
    163B  LEU*     3.5     9.9    -      -       +      +
    165B  GLY*     1.3    73.2    -      -       -      +
    167B  MET*     1.3    77.0    +      -       +      +
    170B  ALA*     2.9    28.1    +      -       -      +
    100C  LEU*     3.6    27.8    -      -       +      -
    108C  TRP*     3.7    24.2    -      -       +      -
    154C  ALA*     3.7    27.6    -      -       -      +
    155C  ALA*     4.0     0.7    -      -       -      +
    158C  ALA*     3.8     7.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  ASN*     4.0     3.6    -      -       -      +
    119B  PRO*     3.5    39.7    -      -       +      +
    120B  TYR*     4.6     0.9    -      -       -      -
    123B  LEU*     3.9    28.9    -      -       +      -
    138B  ILE*     4.7     1.1    -      -       +      -
    140B  ASN*     3.4    45.3    -      -       +      +
    163B  LEU*     3.0    25.2    +      -       +      +
    166B  LEU*     1.3    86.5    -      -       +      +
    168B  THR*     1.3    61.8    +      -       -      +
    170B  ALA*     4.2     2.7    -      -       -      -
    171B  ALA*     2.7    30.0    +      -       -      +
    181B  VAL*     3.4    12.7    -      -       +      +
    182B  SER      5.3     0.7    -      -       -      +
    183B  LEU*     4.4    11.2    -      -       +      -
    100C  LEU*     5.0     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164B  ASN*     2.8    23.7    +      -       +      +
    165B  GLY      3.8     1.0    +      -       -      -
    167B  MET*     1.3    73.2    -      -       -      +
    169B  SER*     1.3    65.9    +      -       -      +
    171B  ALA*     3.6    16.9    -      -       -      +
    172B  GLU*     3.7     6.8    +      -       -      +
    183B  LEU*     4.1    25.8    -      -       +      -
    229B  SER*     4.9    12.1    -      -       -      +
    230B  GLU*     4.8     9.2    -      -       +      +
    149C  PRO*     3.5    29.0    -      -       -      +
    161C  TRP*     3.9    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165B  GLY      2.8    24.3    +      -       -      -
    168B  THR*     1.3    73.9    -      -       -      +
    170B  ALA*     1.3    65.0    +      -       -      +
    172B  GLU*     3.0    17.2    +      -       -      +
    173B  GLU*     3.4    14.3    +      -       -      +
    149C  PRO*     3.4     8.9    -      -       -      +
    150C  VAL      3.2    28.3    +      -       -      -
    151C  ALA*     4.3     1.8    -      -       -      +
    154C  ALA*     3.5    16.6    -      -       -      -
    157C  THR*     3.3    22.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  LEU*     3.8    28.7    -      -       +      -
    166B  LEU      2.9    17.8    +      -       -      +
    167B  MET*     3.7     7.6    -      -       -      +
    169B  SER*     1.3    75.5    -      -       -      +
    171B  ALA*     1.3    62.8    +      -       -      +
    173B  GLU*     3.1    20.1    +      -       -      +
    174B  LEU*     3.0    26.3    +      -       +      +
    181B  VAL*     4.3     2.9    -      -       +      -
    100C  LEU*     4.0    14.4    -      -       +      -
    154C  ALA*     4.2     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  MET      2.7    21.1    +      -       -      +
    168B  THR*     3.6    12.3    -      -       -      +
    169B  SER      3.1     0.2    -      -       -      -
    170B  ALA*     1.3    73.2    -      -       -      +
    172B  GLU*     1.3    60.8    +      -       -      +
    174B  LEU*     4.1     0.3    -      -       -      +
    175B  ARG*     3.2    26.7    +      -       -      +
    179B  VAL      4.8     0.5    -      -       -      +
    181B  VAL*     3.6    34.1    -      -       +      +
    227B  PHE*     4.2    16.1    -      -       +      -
    229B  SER*     5.1     7.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168B  THR      3.7     6.0    +      -       -      +
    169B  SER*     3.0    11.2    +      -       -      +
    171B  ALA*     1.3    78.9    -      -       -      +
    173B  GLU*     1.3    64.1    +      -       -      +
    174B  LEU      3.5     0.2    +      -       -      -
    175B  ARG*     2.9    50.7    +      -       -      +
    176B  GLN*     4.5     3.8    +      -       -      +
    149C  PRO*     6.2     1.8    -      -       +      -
    151C  ALA*     3.7    23.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169B  SER      3.7     5.5    -      -       -      +
    170B  ALA*     3.1    24.6    +      -       -      +
    172B  GLU*     1.3    77.9    -      -       -      +
    174B  LEU*     1.3    61.9    +      -       +      +
    176B  GLN*     3.4    32.1    +      -       -      +
    177B  HIS*     4.1     3.8    -      -       -      -
     99C  PRO*     3.3    19.5    -      -       +      +
    100C  LEU*     2.7    34.2    +      -       -      +
    101C  HIS*     5.3     0.5    +      -       -      -
    151C  ALA*     4.0     5.2    -      -       +      -
    152C  ASP*     3.0    43.2    +      -       -      +
    154C  ALA*     3.6    16.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  LEU*     3.9    25.4    -      -       +      -
    127B  ALA*     4.4     6.1    -      -       +      -
    131B  ILE*     3.8    35.2    -      -       +      -
    138B  ILE*     4.3     5.6    -      -       +      -
    170B  ALA*     3.0    14.7    +      -       +      +
    171B  ALA      4.4     0.2    -      -       -      +
    173B  GLU*     1.3    79.7    -      -       +      +
    175B  ARG*     1.3    57.8    +      -       -      +
    176B  GLN      3.2     2.5    -      -       -      -
    177B  HIS*     2.8    27.6    +      -       +      +
    179B  VAL*     3.2    41.2    +      -       +      +
    181B  VAL*     3.5    26.7    -      -       +      -
    101C  HIS*     3.8    17.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171B  ALA      3.2    16.2    +      -       -      +
    172B  GLU*     2.9    44.1    +      -       -      +
    174B  LEU*     1.3    75.7    -      -       -      +
    176B  GLN*     1.3    57.3    +      -       -      +
    178B  GLN*     3.0    24.2    +      -       -      +
    179B  VAL      3.5     9.3    +      -       -      -
    180B  ARG*     6.2     0.4    -      -       -      -
    227B  PHE*     3.6    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172B  GLU      4.5     2.6    +      -       -      +
    173B  GLU*     3.4    24.6    +      -       -      +
    175B  ARG*     1.3    79.1    -      -       -      +
    177B  HIS*     1.3    86.4    +      -       +      +
    178B  GLN*     3.4    11.0    +      -       -      +
     99C  PRO*     5.5     8.1    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il