Contacts of the helix formed by residues 165 - 191 (chain B) in PDB entry 1BRR


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 PRO 165 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  MET      4.7     1.1    -      -       -      +
    164B  ARG*     1.3    87.4    -      -       +      +
    166B  GLU*     1.3    65.5    +      -       +      +
    168B  ALA*     4.1     6.0    -      -       +      +
    169B  SER*     2.9    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164B  ARG*     3.4    34.2    +      -       +      +
    165B  PRO*     1.3    80.0    -      -       +      +
    167B  VAL*     1.3    59.4    +      -       -      +
    169B  SER*     2.7     8.5    +      -       -      -
    170B  THR*     2.7    42.2    +      -       -      +
    227B  ARG*     3.5    37.0    -      -       +      +
    229B  ILE*     5.7     0.2    -      -       -      -
    230B  PHE      5.3     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100B  LEU*     3.3    36.2    -      -       +      +
    101B  VAL*     5.0     1.6    -      -       -      -
    160B  ALA*     4.7     1.8    -      -       -      +
    163B  MET*     3.6    24.2    -      -       +      -
    164B  ARG*     3.0    28.0    +      -       +      +
    166B  GLU*     1.3    79.6    -      -       +      +
    168B  ALA*     1.3    58.3    +      -       -      +
    170B  THR*     3.1     3.8    +      -       -      -
    171B  PHE*     2.8    35.1    +      -       +      +
    227B  ARG      5.0     2.2    -      -       -      +
    229B  ILE*     4.0    33.7    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    160B  ALA*     3.1    35.2    +      -       -      +
    161B  GLU*     4.0    14.1    -      -       +      -
    164B  ARG      2.9    13.9    +      -       -      +
    165B  PRO*     4.2     5.4    -      -       +      +
    167B  VAL*     1.3    76.7    -      -       -      +
    169B  SER*     1.3    60.8    +      -       -      +
    171B  PHE*     4.4     0.7    -      -       -      +
    172B  LYS*     3.3    34.5    +      -       -      +
----------------------------------------------------------
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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  PRO      2.9    17.3    +      -       -      -
    166B  GLU*     2.7    22.5    +      -       -      -
    168B  ALA*     1.3    77.6    -      -       -      +
    170B  THR*     1.3    62.7    +      -       -      +
    172B  LYS*     3.7     6.9    +      -       -      +
    173B  VAL*     3.4    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100B  LEU*     4.3    11.9    -      -       +      -
    166B  GLU*     2.7    29.6    +      -       -      +
    167B  VAL*     3.9     4.3    -      -       -      -
    169B  SER*     1.3    74.2    +      -       -      +
    171B  PHE*     1.3    66.2    +      -       -      +
    173B  VAL*     3.2     7.9    +      -       -      +
    174B  LEU*     3.2    37.7    +      -       +      +
    222B  ILE*     4.5    10.3    -      -       +      +
    223B  LEU*     4.4     4.7    -      -       +      -
    226B  SER*     3.4    35.5    +      -       -      +
    227B  ARG      4.9     4.1    +      -       -      -
    228B  ALA*     6.5     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97B  LEU*     4.4    20.9    -      -       +      -
    100B  LEU*     4.0    18.0    -      -       +      +
    101B  VAL*     3.4    22.7    -      -       +      -
    152B  LEU*     3.1    26.7    -      -       +      -
    156B  PHE*     3.2    35.7    -      +       +      -
    157B  THR*     3.6    13.7    -      -       -      -
    160B  ALA*     3.6    20.4    -      -       +      -
    167B  VAL*     2.8    21.6    +      -       +      +
    168B  ALA      4.4     0.9    -      -       -      +
    170B  THR*     1.3    73.0    -      -       -      +
    172B  LYS*     1.3    59.0    +      -       +      +
    174B  LEU*     3.4     3.9    +      -       -      +
    175B  ARG*     2.6    59.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157B  THR*     4.1     9.9    -      -       -      -
    160B  ALA*     6.0     0.7    -      -       +      -
    161B  GLU*     3.0    39.9    +      -       -      +
    168B  ALA*     3.3    22.9    +      -       -      +
    169B  SER*     3.9     7.4    -      -       -      +
    170B  THR      3.2     0.6    -      -       -      -
    171B  PHE*     1.3    82.2    -      -       +      +
    173B  VAL*     1.3    65.4    +      -       +      +
    175B  ARG*     3.2    28.9    -      -       -      +
    176B  ASN*     2.9    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169B  SER      3.4    13.2    +      -       -      +
    170B  THR*     3.2     9.8    +      -       -      +
    172B  LYS*     1.3    76.6    -      -       +      +
    174B  LEU*     1.3    58.8    +      -       -      +
    176B  ASN*     3.1    11.8    +      -       -      +
    177B  VAL*     2.9    30.2    +      -       +      +
    222B  ILE*     3.6    35.2    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
     97B  LEU*     4.1    16.2    -      -       +      -
    100B  LEU*     3.9    13.9    -      -       +      -
    170B  THR*     3.2    18.1    +      -       +      +
    171B  PHE*     3.5     6.3    -      -       -      +
    173B  VAL*     1.3    74.6    -      -       -      +
    175B  ARG*     1.3    58.0    +      -       -      +
    177B  VAL*     2.8     7.5    +      -       -      +
    178B  THR*     2.8    37.0    +      -       -      +
    219B  PHE*     3.6    39.0    -      -       +      +
    222B  ILE*     3.6    34.3    -      -       +      -
    223B  LEU*     3.6    31.0    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     97B  LEU*     5.6     2.2    -      -       -      +
    152B  LEU*     3.7    14.8    -      -       +      +
    153B  PHE*     3.1    44.0    -      -       +      +
    157B  THR*     3.1    31.3    +      -       -      +
    171B  PHE*     2.6    45.5    +      -       +      +
    172B  LYS*     3.2    37.8    +      -       -      +
    173B  VAL      3.4     0.2    -      -       -      -
    174B  LEU*     1.3    72.2    -      -       -      +
    176B  ASN*     1.3    88.3    +      -       -      +
    178B  THR*     3.2     8.6    +      -       -      -
    179B  VAL*     3.1    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153B  PHE*     5.0     1.1    -      -       -      -
    172B  LYS*     2.9    23.9    +      -       -      +
    173B  VAL*     3.3    10.0    -      -       -      +
    175B  ARG*     1.3   109.0    +      -       -      +
    177B  VAL*     1.3    64.5    +      -       +      +
    179B  VAL*     4.1     2.1    -      -       -      +
    180B  VAL*     3.1    33.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  VAL*     2.9    18.4    +      -       +      +
    174B  LEU*     2.8    13.2    +      -       +      +
    176B  ASN*     1.3    73.3    -      -       +      +
    178B  THR*     1.3    58.4    +      -       +      +
    180B  VAL*     4.2     2.6    -      -       -      +
    181B  LEU*     3.0    48.9    +      -       +      +
    214B  SER      4.5     7.9    -      -       -      +
    215B  ALA*     5.4     0.9    -      -       -      -
    219B  PHE*     5.1    10.8    -      -       +      +
    222B  ILE*     3.7    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  LEU*     6.2     1.8    -      -       +      -
     97B  LEU*     4.4    10.3    -      -       +      +
    149B  LEU*     4.1     1.6    -      -       -      +
    152B  LEU*     4.2    17.4    -      -       -      +
    174B  LEU      2.8    21.1    +      -       -      +
    175B  ARG*     3.2    14.7    +      -       -      -
    177B  VAL*     1.3    73.3    -      -       +      +
    179B  VAL*     1.3    63.5    +      -       -      +
    180B  VAL      3.2     1.8    -      -       -      -
    181B  LEU*     4.8     0.2    -      -       -      -
    182B  TRP*     3.0    56.4    +      -       +      +
    215B  ALA*     5.9     0.9    -      -       +      +
    219B  PHE*     3.5    35.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  LEU*     3.8    43.8    -      -       +      +
    152B  LEU*     5.1     3.1    -      -       +      -
    153B  PHE*     4.7    17.3    -      -       +      -
    175B  ARG*     3.1    31.1    +      -       +      +
    176B  ASN*     4.2     3.1    -      -       -      +
    178B  THR*     1.3    79.6    +      -       -      +
    180B  VAL*     1.3    56.8    +      -       +      +
    183B  SER*     2.7    35.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  ASN*     3.1    20.6    +      -       +      +
    177B  VAL*     4.2     3.6    -      -       -      +
    178B  THR      3.2     0.2    -      -       -      -
    179B  VAL*     1.3    82.1    -      -       +      +
    181B  LEU*     1.3    71.7    +      -       +      +
    183B  SER*     2.9    18.8    +      -       -      -
    184B  ALA*     3.5    10.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177B  VAL*     3.0    33.8    +      -       +      +
    178B  THR*     4.8     0.2    -      -       -      -
    180B  VAL*     1.3    83.2    -      -       +      +
    182B  TRP*     1.3    62.4    +      -       +      +
    184B  ALA*     3.4    13.8    +      -       +      +
    185B  TYR*     3.0    23.7    -      -       +      -
    211B  LEU*     4.1    21.6    -      -       +      +
    214B  SER*     3.3    36.3    -      -       -      +
    215B  ALA*     3.5    34.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  THR*     3.9    22.2    -      -       +      -
     93B  LEU*     4.3    11.3    -      -       +      +
     94B  LEU*     3.2    35.4    -      -       +      -
    115B  ASP*     3.6    22.0    -      -       -      -
    118B  MET*     4.2     9.0    -      -       +      -
    145B  MET*     3.2    21.5    -      -       +      +
    148B  ILE*     4.0    15.0    -      -       +      -
    149B  LEU*     4.2    20.4    -      -       +      -
    152B  LEU*     5.5     1.1    -      -       +      -
    178B  THR*     3.0    45.5    +      -       +      +
    181B  LEU*     1.3    79.5    -      -       +      +
    183B  SER*     1.3    64.6    +      -       -      +
    185B  TYR*     3.3    15.1    +      +       -      +
    186B  PRO*     3.3     9.0    -      -       -      +
    215B  ALA*     4.9     6.8    +      -       +      +
    999B  RET      3.4    43.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  MET*     3.8    15.4    -      -       -      +
    149B  LEU*     4.3     9.4    -      -       -      +
    179B  VAL*     2.7    25.5    +      -       -      -
    180B  VAL*     2.9    14.3    +      -       -      -
    182B  TRP*     1.3    79.3    -      -       -      +
    184B  ALA*     1.3    57.1    -      -       -      +
    186B  PRO*     3.1    15.6    -      -       -      +
    187B  VAL*     3.8    12.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180B  VAL      3.5     7.5    +      -       -      +
    181B  LEU*     3.4     8.2    +      -       +      +
    182B  TRP      3.2     0.8    -      -       -      -
    183B  SER*     1.3    79.9    +      -       -      +
    185B  TYR*     1.3    65.1    -      -       -      +
    187B  VAL*     3.0    12.9    +      -       +      +
    188B  VAL*     3.0    27.4    +      -       +      +
    211B  LEU*     3.6    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86B  TRP*     3.7    10.5    -      +       -      -
    181B  LEU*     3.0    33.7    -      -       +      -
    182B  TRP*     3.5    11.4    -      +       -      +
    184B  ALA*     1.3    77.3    -      -       -      +
    186B  PRO*     1.3    67.8    -      -       +      +
    188B  VAL*     3.3     2.1    +      -       -      +
    189B  TRP*     3.0    25.8    +      -       -      +
    208B  PHE*     3.3    38.9    -      +       -      -
    211B  LEU*     3.4    36.8    +      -       +      -
    212B  ASP*     2.6    26.7    +      -       -      -
    215B  ALA*     4.2     1.6    -      -       +      +
    999B  RET      3.4    61.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 186 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138B  TRP*     2.9    44.0    +      -       +      +
    142B  THR*     4.1     7.4    -      -       +      +
    145B  MET*     3.7    17.5    -      -       +      -
    182B  TRP      3.3    10.8    -      -       -      +
    183B  SER      3.1    21.1    -      -       -      +
    185B  TYR*     1.3    87.4    -      -       +      +
    187B  VAL*     1.3    57.2    +      -       +      +
    189B  TRP*     4.4     0.9    -      -       +      -
    190B  LEU*     3.1    18.0    +      -       -      +
    999B  RET      3.5    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 187 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138B  TRP*     5.6     0.9    -      -       +      -
    183B  SER      3.8    16.4    -      -       -      +
    184B  ALA*     3.0    11.1    +      -       -      +
    186B  PRO*     1.3    78.4    -      -       +      +
    188B  VAL*     1.3    67.1    +      -       +      +
    190B  LEU*     3.4     7.4    +      -       +      +
    191B  ILE*     3.1    39.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 188 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184B  ALA*     3.0    17.9    +      -       +      +
    185B  TYR      3.3     3.3    +      -       -      +
    187B  VAL*     1.3    73.6    -      -       +      +
    189B  TRP*     1.3    66.4    +      -       -      +
    191B  ILE*     3.2    10.8    +      -       +      +
    192B  GLY*     2.9    23.4    +      -       -      -
    204B  GLU*     3.9    20.7    -      -       +      +
    207B  LEU*     3.8    45.1    -      -       +      -
    208B  PHE*     4.1    16.2    -      -       +      -
    211B  LEU*     4.2    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 189 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  TYR*     2.9    16.9    +      -       -      -
     86B  TRP*     5.6     0.4    -      +       -      -
    122B  GLY*     4.6     3.3    +      -       -      -
    125B  GLY*     4.0     2.9    -      -       -      -
    126B  ALA*     3.9    24.1    -      -       -      +
    134B  ARG*     3.8    28.0    -      -       +      -
    135B  PHE*     4.6     9.6    -      +       -      -
    138B  TRP*     3.2    36.6    -      +       +      -
    185B  TYR      3.0    17.0    +      -       -      +
    186B  PRO      3.9     3.8    -      -       -      +
    188B  VAL*     1.3    77.9    -      -       -      +
    190B  LEU*     1.3    65.9    +      -       -      +
    192B  GLY*     3.3     8.8    +      -       -      +
    194B  GLU*     2.9    54.9    +      -       +      -
    195B  GLY*     3.7    17.5    +      -       -      -
    204B  GLU*     4.4     5.2    -      -       -      -
    208B  PHE*     4.1    11.6    -      +       +      -
    999B  RET      3.9    33.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 190 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135B  PHE*     3.5    34.3    -      -       +      -
    138B  TRP*     3.8    34.8    -      -       +      +
    186B  PRO      3.1    15.2    +      -       -      +
    187B  VAL*     3.6     7.4    -      -       +      +
    188B  VAL      3.2     0.2    -      -       -      -
    189B  TRP*     1.3    86.7    -      -       +      +
    191B  ILE*     1.3    63.3    +      -       +      +
    192B  GLY      3.3     0.4    -      -       -      -
    195B  GLY*     4.9     0.7    -      -       -      -
    196B  ALA*     3.1    30.6    +      -       +      +
    198B  ILE*     5.1     0.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 191 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187B  VAL*     3.1    33.0    +      -       +      +
    188B  VAL*     3.2    13.0    +      -       +      +
    190B  LEU*     1.3    83.0    -      -       +      +
    192B  GLY*     1.3    60.7    +      -       -      +
    196B  ALA      3.4     8.3    -      -       -      +
    198B  ILE*     3.4    32.6    +      -       +      -
    199B  VAL*     2.8    52.5    +      -       +      -
    207B  LEU*     4.9    11.4    -      -       +      -
----------------------------------------------------------
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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