Contacts of the helix formed by residues 159 - 180 (chain B) in PDB entry 4NEF


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with THR 159 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157A  PRO      5.0     5.6    -      -       -      +
    159A  THR*     3.8    16.2    -      -       +      -
    162A  LEU*     5.9     1.6    -      -       +      -
    157B  PRO      2.8    12.5    +      -       -      -
    158B  GLY*     1.4    79.0    -      -       -      +
    160B  PRO*     1.4    58.6    -      -       -      +
    161B  ALA      3.5     1.8    -      -       -      -
    162B  LEU*     4.2    10.5    -      -       +      +
    163B  SER*     2.9    37.7    +      -       -      -
     57C  GLN*     4.1     2.7    +      -       -      -
    161C  ALA*     5.7     1.9    +      -       -      +
    162C  LEU*     3.8    28.2    +      -       +      +
    159D  THR*     3.7    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56B  VAL*     5.6     2.5    -      -       +      -
    148B  SER*     3.7    39.0    -      -       -      +
    149B  THR*     5.1     3.6    -      -       +      -
    157B  PRO*     4.3     8.1    -      -       +      -
    158B  GLY      3.6     9.4    -      -       -      +
    159B  THR*     1.4    87.4    -      -       -      +
    161B  ALA*     1.3    53.8    +      -       -      +
    163B  SER*     3.7     0.3    -      -       -      -
    164B  ILE*     2.8    45.6    +      -       +      +
     57C  GLN*     4.8     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  GLY*     3.3    33.6    -      -       -      +
     56B  VAL*     3.9    15.8    -      -       +      +
     57B  GLN*     3.7    33.2    -      -       +      +
    159B  THR      3.5     0.6    -      -       -      -
    160B  PRO*     1.3    78.5    -      -       -      +
    162B  LEU*     1.3    57.8    +      -       +      +
    164B  ILE*     3.9     1.8    -      -       -      +
    165B  GLY      2.8    25.1    +      -       -      -
    159D  THR*     5.6     1.3    -      -       -      +
    163D  SER*     5.0     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  LEU*     5.7     0.2    -      -       +      -
     50B  LEU*     6.0     1.3    -      -       +      -
     53B  GLY*     5.2     6.1    -      -       -      +
    159B  THR*     3.6     9.2    +      -       +      -
    160B  PRO      3.4     0.4    -      -       -      -
    161B  ALA*     1.3    78.2    -      -       +      +
    163B  SER*     1.4    53.0    +      -       -      +
    165B  GLY*     3.3     1.5    +      -       -      -
    166B  PHE*     2.8    47.7    +      -       +      -
    162C  LEU*     3.7    25.4    -      -       +      -
    159D  THR*     3.8    27.6    -      -       +      +
    162D  LEU*     3.9    30.1    -      -       +      -
    163D  SER*     4.2    17.0    -      -       -      +
    166D  PHE*     3.7    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  CYS*     3.8     6.6    -      -       -      -
    148B  SER*     4.0     2.7    -      -       -      -
    159B  THR*     2.9    30.1    +      -       -      -
    160B  PRO      3.7     2.5    -      -       -      -
    162B  LEU*     1.4    75.4    -      -       -      +
    164B  ILE*     1.4    57.4    +      -       -      +
    166B  PHE*     3.3     3.9    +      -       -      +
    167B  SER*     3.0    28.1    +      -       -      -
     53C  GLY      5.4     0.6    +      -       -      -
     54C  THR*     4.6     3.8    +      -       -      +
     57C  GLN*     3.0    40.3    +      -       -      +
    161C  ALA*     5.0     2.4    -      -       -      +
    162C  LEU*     4.2    15.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52B  ILE*     3.7    21.8    -      -       +      -
     56B  VAL*     4.3    22.0    -      -       +      -
    141B  LEU*     4.0     3.3    -      -       +      +
    144B  CYS*     4.3     1.6    -      -       -      -
    145B  ILE*     3.7    54.3    -      -       +      +
    148B  SER*     4.0    17.7    -      -       -      +
    149B  THR*     4.2    15.5    -      -       +      -
    160B  PRO*     2.8    27.2    +      -       +      +
    161B  ALA*     3.9     3.8    -      -       -      +
    163B  SER*     1.4    70.4    -      -       -      +
    165B  GLY*     1.3    60.8    +      -       -      +
    167B  SER*     3.3     9.3    +      -       -      -
    168B  VAL*     3.2    23.1    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     49B  GLY*     3.2    34.0    -      -       -      -
     50B  LEU*     5.6     0.4    -      -       -      -
     52B  ILE*     4.6     2.9    -      -       -      -
     53B  GLY*     3.8    10.7    -      -       -      -
    161B  ALA      2.8    17.7    +      -       -      -
    162B  LEU*     3.6     1.8    -      -       -      -
    164B  ILE*     1.3    76.7    -      -       -      +
    166B  PHE*     1.4    56.2    +      -       -      +
    168B  VAL*     3.2     3.6    +      -       -      +
    169B  ALA      3.1    21.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  MET*     3.8    27.1    -      -       +      -
     49B  GLY      6.2     0.7    -      -       -      -
     50B  LEU*     4.3    12.1    -      -       +      -
    162B  LEU*     2.8    37.1    +      -       +      +
    163B  SER*     4.0     3.6    -      -       -      +
    165B  GLY*     1.4    69.5    -      -       -      +
    167B  SER*     1.3    57.9    +      -       -      +
    169B  ALA*     3.6     8.2    -      -       +      +
    170B  LEU*     2.9    27.7    +      -       -      +
     46C  MET*     5.1     1.3    -      -       +      -
     50C  LEU*     3.7    40.8    -      -       +      +
     54C  THR*     4.2     5.6    -      -       -      +
    162C  LEU*     3.6    37.0    -      -       +      -
    166C  PHE*     4.3    17.5    -      +       -      -
    166D  PHE*     4.1    30.3    -      +       -      -
----------------------------------------------------------
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Residues in contact with SER 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  GLN*     2.9    31.8    +      -       -      -
    141B  LEU*     3.3    24.2    -      -       -      +
    144B  CYS*     3.8     8.2    -      -       -      +
    163B  SER      3.0    12.5    +      -       -      -
    164B  ILE      3.3    11.0    -      -       -      -
    165B  GLY      3.2     0.4    -      -       -      -
    166B  PHE*     1.3    73.4    -      -       -      +
    168B  VAL*     1.3    60.2    +      -       -      +
    170B  LEU*     3.3     2.6    +      -       -      +
    171B  GLY      3.0    23.2    +      -       -      -
     54C  THR*     3.7    22.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23B  PHE*     5.0     3.1    -      -       +      -
     48B  PHE*     3.7    24.5    -      -       +      +
     49B  GLY*     4.1     1.6    -      -       -      -
     52B  ILE*     3.8    29.6    -      -       +      -
    141B  LEU*     3.6    24.7    -      -       +      -
    164B  ILE      3.2    14.0    +      -       -      +
    165B  GLY      3.2     8.0    +      -       -      +
    167B  SER*     1.3    75.8    -      -       -      +
    169B  ALA*     1.4    59.7    +      -       -      +
    171B  GLY*     3.3     2.9    +      -       -      -
    172B  HIS*     2.9    48.7    +      -       +      +
    183B  MET*     4.0    10.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  ALA*     3.4    38.9    -      -       +      +
     46B  MET*     4.6     7.2    -      -       -      +
     49B  GLY*     3.9     4.0    -      -       -      -
    165B  GLY      3.1    13.3    +      -       -      +
    166B  PHE*     3.6    14.8    -      -       +      +
    167B  SER      3.3     0.2    -      -       -      -
    168B  VAL*     1.4    76.3    -      -       -      +
    170B  LEU*     1.4    56.8    +      -       -      +
    172B  HIS      3.2     1.9    +      -       -      -
    173B  LEU*     3.0    28.6    +      -       +      +
     50C  LEU*     3.9    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  GLN*     3.5    23.8    -      -       +      +
    166B  PHE      2.9    18.5    +      -       -      +
    167B  SER      3.5     4.0    -      -       -      +
    168B  VAL      3.3     0.2    -      -       -      -
    169B  ALA*     1.4    70.6    -      -       -      +
    171B  GLY*     1.3    66.2    +      -       -      +
    173B  LEU*     3.3    19.9    +      -       +      +
    174B  LEU*     3.7     6.4    +      -       -      +
     26C  PHE*     3.8    32.2    -      -       +      +
     30C  SER*     5.0     1.0    +      -       -      +
     47C  ALA*     3.3    32.3    -      -       +      +
     50C  LEU*     4.1     7.8    -      -       +      +
     51C  GLY*     3.7    26.2    -      -       -      +
     54C  THR*     3.8    15.5    -      -       +      +
     55C  LEU*     5.9     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  LEU*     3.5     9.3    -      -       -      +
    140B  GLN*     4.3     1.5    -      -       -      +
    167B  SER      3.0    12.5    +      -       -      -
    168B  VAL      3.3     4.2    +      -       -      -
    170B  LEU*     1.3    75.2    -      -       -      +
    172B  HIS*     1.3    49.9    -      -       -      +
    174B  LEU      3.4     0.5    +      -       -      -
    175B  GLY*     2.8    34.0    +      -       -      -
    181B  CYS*     3.7     8.3    -      -       -      -
    183B  MET*     3.7    17.9    -      -       -      -
     26C  PHE*     3.9    14.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23B  PHE*     5.5     1.2    -      -       -      -
     44B  ILE*     4.7     0.2    -      -       -      +
     45B  ALA*     3.6    20.2    -      -       -      -
     48B  PHE*     3.4    49.8    -      +       +      +
    168B  VAL*     2.9    41.5    +      -       +      +
    169B  ALA*     3.2     8.0    +      -       -      +
    171B  GLY*     1.3    72.1    -      -       -      +
    173B  LEU*     1.4    62.2    +      -       -      +
    174B  LEU      3.1     2.2    -      -       -      -
    176B  ILE*     3.1    44.4    +      -       +      +
    180B  GLY      4.3     1.7    +      -       -      -
    181B  CYS*     3.5    42.0    -      -       +      +
    182B  SER      4.8     4.5    +      -       -      -
    183B  MET*     4.3     3.7    -      -       -      -
    187B  ARG*     5.0     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  VAL*     4.0    11.5    -      -       +      +
     42B  LEU*     3.9    23.8    -      -       +      -
     45B  ALA*     4.0     7.4    -      -       +      -
    169B  ALA      3.0    16.9    +      -       -      +
    170B  LEU*     3.3    12.0    +      -       +      +
    172B  HIS*     1.4    74.6    -      -       -      +
    174B  LEU*     1.4    56.4    +      -       -      +
    177B  HIS*     3.5    21.7    +      -       -      -
     30C  SER*     3.3    21.7    +      -       -      +
     43C  GLN*     3.6    34.9    -      -       +      +
     46C  MET*     3.9    11.4    -      -       +      +
     47C  ALA*     3.5    37.2    -      -       +      +
     50C  LEU*     4.6     9.6    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    133B  VAL*     4.3     4.5    -      -       +      -
    137B  LEU*     3.8    12.3    -      -       +      -
    170B  LEU      3.7     1.0    +      -       -      -
    171B  GLY      3.4     5.5    +      -       -      +
    172B  HIS      3.1     0.2    -      -       -      -
    173B  LEU*     1.4    77.3    -      -       -      +
    175B  GLY*     1.3    63.8    +      -       -      +
    176B  ILE      3.3     3.1    +      -       -      -
    177B  HIS*     3.5    13.6    +      -       -      -
    178B  TYR*     3.3    42.2    -      -       +      +
     25C  PHE*     3.7    35.9    -      -       +      +
     26C  PHE*     3.7    31.0    -      -       +      +
     29C  GLY*     3.5    36.6    -      -       -      +
     30C  SER*     3.8     8.5    -      -       -      +
    104C  LEU*     4.4     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  VAL*     4.6     2.0    -      -       -      -
    137B  LEU*     3.6    23.7    -      -       -      +
    171B  GLY      2.8    20.7    +      -       -      -
    174B  LEU*     1.3    71.3    -      -       -      +
    176B  ILE*     1.4    63.2    +      -       -      +
    178B  TYR*     3.2     7.5    +      -       -      +
    179B  THR*     3.0    24.4    +      -       -      -
    181B  CYS*     3.2    13.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  VAL*     3.7    47.8    -      -       +      +
     44B  ILE*     3.7    35.9    -      -       +      -
     45B  ALA      4.1     0.2    -      -       -      +
    122B  SER*     4.4     6.1    +      -       -      -
    172B  HIS*     3.1    38.3    +      -       +      +
    174B  LEU      3.3     0.2    -      -       -      -
    175B  GLY*     1.4    73.5    -      -       -      +
    177B  HIS*     1.3    62.8    +      -       +      +
    178B  TYR      4.4     0.2    -      -       -      -
    180B  GLY*     3.1    43.0    +      -       -      +
    181B  CYS*     3.6     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  VAL*     3.6    33.9    -      -       +      +
    122B  SER*     3.4    14.2    -      -       -      +
    123B  ASN*     2.8    27.1    +      -       -      +
    125B  THR*     4.5     0.7    +      -       -      -
    173B  LEU      3.5    25.5    +      -       -      -
    174B  LEU*     3.6    12.8    -      -       -      +
    175B  GLY      3.3     0.8    -      -       -      -
    176B  ILE*     1.3    75.3    -      -       -      +
    178B  TYR*     1.3    59.5    +      -       +      +
     29C  GLY      4.5     3.1    -      -       -      -
     30C  SER*     4.8     5.4    +      -       -      -
     33C  ASN*     3.4    59.6    +      -       +      +
     35C  PRO*     4.4    10.9    -      -       -      +
     37C  ALA*     4.3     8.2    -      -       +      +
     39C  PRO*     5.2     0.4    -      -       +      -
     43C  GLN*     4.5     7.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  LEU*     3.6     4.7    -      -       -      +
    122B  SER*     2.8    29.8    +      -       -      +
    125B  THR*     3.8    35.2    -      -       +      +
    130B  ALA*     5.2     0.7    -      -       -      -
    133B  VAL*     3.9    31.2    -      -       +      -
    174B  LEU*     3.3    40.2    -      -       +      -
    175B  GLY*     3.2     4.5    +      -       -      +
    177B  HIS*     1.3    79.2    -      -       -      +
    179B  THR*     1.3    63.9    +      -       +      +
    180B  GLY      3.8     0.2    -      -       -      -
     33C  ASN*     3.1    29.8    +      -       -      -
    104C  LEU*     3.4    14.2    -      -       -      +
    107C  ILE*     3.6    28.0    -      -       +      -
    108C  THR*     2.7    28.3    +      -       -      -
    109C  PRO*     4.5     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  ASN*     3.3    11.6    -      -       -      +
    120B  ALA      3.1    35.4    +      -       -      -
    121B  LEU*     4.4     3.6    -      -       +      -
    130B  ALA*     3.6    30.5    -      -       +      +
    133B  VAL*     5.7     1.7    -      -       +      +
    134B  GLU*     2.6    30.7    +      -       +      +
    137B  LEU*     5.0     0.5    -      -       -      +
    175B  GLY*     3.0     6.8    +      -       -      -
    178B  TYR*     1.3    80.7    -      -       +      +
    180B  GLY*     1.3    58.3    +      -       -      +
    181B  CYS      3.1     7.0    +      -       -      -
    182B  SER      5.0     0.4    -      -       -      -
    203B  VAL*     4.4     3.4    -      -       +      -
    204B  PHE*     3.6    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  ILE*     5.6     1.7    -      -       -      +
     48B  PHE*     5.7     0.9    -      -       -      -
    118B  VAL      5.7     1.3    -      -       -      -
    119B  ASN*     3.8     4.2    -      -       -      +
    120B  ALA      4.0     2.2    +      -       -      -
    122B  SER*     5.1     1.0    -      -       -      -
    172B  HIS*     4.3     3.3    +      -       -      -
    176B  ILE*     3.1    39.3    +      -       -      +
    178B  TYR      3.8     0.2    -      -       -      -
    179B  THR*     1.3    76.6    -      -       -      +
    181B  CYS*     1.4    68.8    +      -       -      +
    187B  ARG*     4.6     7.4    +      -       -      -
----------------------------------------------------------
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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