Contacts of the helix formed by residues 11 - 34 (chain B) in PDB entry 3ABD


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 PHE 11 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  GLN*     3.1    46.7    -      -       +      +
    122A  LEU*     4.7     7.6    -      -       +      -
    124A  ALA*     5.2     3.6    -      -       +      -
    125A  ALA*     4.3    20.6    -      -       +      -
    128A  LEU*     4.9     7.6    -      -       +      -
     10B  ASN*     1.3    82.7    +      -       -      +
     12B  GLY*     1.3    56.7    +      -       -      +
     14B  VAL*     3.2    16.2    +      -       +      -
     15B  VAL*     2.9    31.2    +      -       +      +
    104B  GLN*     5.5     0.4    -      -       -      -
    107B  LEU*     2.6    40.1    -      -       +      +
    110B  ILE*     4.2    16.4    -      -       +      -
    196B  ILE*     4.2    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 12 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  GLN*     3.3     1.0    +      -       -      -
     10B  ASN*     2.9    17.4    +      -       -      -
     11B  PHE*     1.3    75.1    -      -       -      +
     13B  GLN*     1.3    59.7    +      -       -      +
     15B  VAL*     4.1     0.4    -      -       -      +
     16B  ALA*     2.9    32.2    +      -       -      +
     75B  LEU      4.6     0.5    -      -       -      +
     76B  GLU*     3.7    25.5    -      -       -      -
    104B  GLN*     4.4    13.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 13 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113A  ASP      5.5     0.2    -      -       -      +
    114A  SER*     4.1    22.6    -      -       -      +
    117A  SER*     3.4    27.5    +      -       -      +
    118A  HIS*     3.9    13.5    -      -       -      +
    121A  GLN*     3.0    17.0    +      -       -      +
     12B  GLY*     1.3    75.2    -      -       -      +
     14B  VAL*     1.3    63.7    +      -       -      +
     16B  ALA*     4.6     3.0    -      -       -      +
     17B  ASP*     2.9    65.4    +      -       -      +
     72B  LYS*     4.5    11.3    -      -       -      +
     76B  GLU*     3.8    21.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 14 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  HIS*     3.8    37.2    -      -       +      +
    121A  GLN*     3.6    18.6    -      -       +      +
    122A  LEU*     4.0    17.3    -      -       +      -
     11B  PHE*     3.2    16.9    +      -       +      +
     13B  GLN*     1.3    77.1    -      -       -      +
     15B  VAL*     1.3    64.7    +      -       -      +
     17B  ASP*     3.3     2.1    +      -       -      +
     18B  VAL*     2.9    28.4    +      -       +      +
    116B  LEU*     3.7    29.8    -      -       +      -
    196B  ILE*     4.6    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 15 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11B  PHE      2.9    23.9    +      -       -      +
     12B  GLY      4.1     0.9    -      -       -      +
     14B  VAL*     1.3    73.4    -      -       -      +
     16B  ALA*     1.3    57.9    +      -       -      +
     18B  VAL*     3.2     5.8    +      -       +      +
     19B  LEU*     2.8    53.0    +      -       +      +
    104B  GLN*     3.7    36.1    -      -       +      +
    196B  ILE*     3.5    47.1    -      -       +      +
    197B  LEU*     4.3    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 16 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  GLY      2.9    22.7    +      -       -      +
     13B  GLN*     3.9     4.3    -      -       -      +
     15B  VAL*     1.3    73.2    -      -       -      +
     17B  ASP*     1.3    58.3    +      -       -      +
     19B  LEU*     4.1     0.2    -      -       -      +
     20B  CYS*     2.9    36.7    +      -       -      -
     72B  LYS*     3.7    32.8    -      -       +      +
     75B  LEU*     3.8    14.7    +      -       +      +
     76B  GLU*     3.8    15.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 17 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113A  ASP      4.4     8.5    +      -       -      -
    114A  SER      4.6     2.4    -      -       -      +
    115A  LEU*     5.6     0.3    -      -       -      +
    118A  HIS*     2.7    41.9    +      -       +      +
     13B  GLN*     2.9    41.5    +      -       -      +
     14B  VAL      3.7     1.3    -      -       -      +
     16B  ALA*     1.3    75.2    -      -       -      +
     18B  VAL*     1.3    62.3    +      -       -      +
     20B  CYS*     3.5     1.4    +      -       -      +
     21B  GLU*     3.1    25.8    +      -       -      +
     72B  LYS*     3.0    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 18 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  HIS*     5.0     6.3    -      -       +      -
     14B  VAL*     2.9    31.2    +      -       +      +
     15B  VAL*     3.7     5.8    -      -       +      +
     17B  ASP*     1.3    74.5    -      -       -      +
     19B  LEU*     1.3    66.3    +      -       +      +
     21B  GLU*     3.3    10.2    +      -       -      +
     22B  PHE*     3.0    26.5    +      -       -      +
     48B  TYR*     4.2     2.1    +      -       -      +
    116B  LEU*     4.5    19.3    -      -       +      -
    119B  VAL*     4.0    16.6    -      -       +      -
    120B  GLU*     5.4    10.1    -      -       +      +
    123B  LEU*     4.0    22.9    -      -       +      -
    196B  ILE*     6.1     3.8    -      -       +      -
    197B  LEU*     5.4     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 19 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15B  VAL*     2.8    30.9    +      -       +      +
     16B  ALA      4.1     2.0    -      -       -      +
     18B  VAL*     1.3    76.3    -      -       +      +
     20B  CYS*     1.3    56.6    +      -       -      +
     22B  PHE*     3.6    10.4    -      -       +      +
     23B  LEU*     2.8    40.2    +      -       +      +
     75B  LEU*     4.1    20.0    -      -       +      -
    102B  ILE*     4.1    25.4    -      -       +      -
    104B  GLN*     5.1     0.2    -      -       -      +
    123B  LEU*     5.2     2.0    -      -       +      -
    197B  LEU*     3.8    44.2    -      -       +      -
    199B  MET*     3.9    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 20 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  ALA      2.9    22.5    +      -       -      +
     17B  ASP      4.1     1.8    -      -       -      +
     19B  LEU*     1.3    72.9    -      -       -      +
     21B  GLU*     1.3    66.9    +      -       -      +
     23B  LEU*     4.5     4.0    -      -       -      +
     24B  GLU*     3.1    24.1    +      -       -      +
     68B  LEU*     3.7    42.0    -      -       +      +
     71B  VAL*     5.0     0.7    -      -       -      -
     72B  LYS*     3.8    28.3    -      -       -      -
     75B  LEU*     3.7    20.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 21 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  ASP      3.1    19.0    +      -       -      +
     18B  VAL*     3.6     9.5    -      -       -      +
     20B  CYS*     1.3    81.5    -      -       -      +
     22B  PHE*     1.2    63.0    +      -       -      +
     24B  GLU*     3.4    10.1    +      -       -      +
     25B  VAL*     3.4    25.9    +      -       +      +
     47B  LYS*     5.7     5.8    +      -       +      +
     48B  TYR*     3.7    15.1    -      -       +      +
    120B  GLU*     4.9     8.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 22 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  VAL      3.0    15.6    +      -       -      +
     19B  LEU*     3.6     9.0    -      -       +      +
     21B  GLU*     1.2    79.9    -      -       -      +
     23B  LEU*     1.3    67.7    +      -       +      +
     25B  VAL*     3.2     2.6    +      -       -      +
     26B  ALA*     2.8    32.9    +      -       +      +
     48B  TYR*     3.1    27.5    +      +       -      +
    100B  PHE*     3.7    28.7    -      +       -      -
    123B  LEU*     3.7    39.3    -      -       +      -
    126B  PHE*     3.7    20.6    -      +       +      -
    127B  ILE*     3.7    21.5    -      -       +      -
    130B  ILE*     5.5     0.2    -      -       +      -
    199B  MET*     3.6    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 23 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  LEU*     2.8    35.4    +      -       +      +
     20B  CYS*     4.2     0.9    -      -       -      +
     22B  PHE*     1.3    81.8    -      -       +      +
     24B  GLU*     1.3    57.3    +      -       -      +
     26B  ALA*     3.9     2.2    -      -       -      +
     27B  VAL*     2.8    40.0    +      -       +      +
     68B  LEU*     4.0    27.6    -      -       +      -
     71B  VAL*     5.6     0.7    -      -       +      -
     75B  LEU*     5.0     7.9    -      -       +      -
     83B  VAL*     4.2    30.7    -      -       +      -
    100B  PHE*     3.9    47.1    -      -       +      -
    102B  ILE*     5.1     6.5    -      -       +      -
    199B  MET*     5.7     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 24 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  CYS      3.1    19.6    +      -       -      +
     21B  GLU*     3.6    10.7    -      -       -      +
     22B  PHE      3.1     0.2    -      -       -      -
     23B  LEU*     1.3    77.8    -      -       -      +
     25B  VAL*     1.3    65.3    +      -       +      +
     27B  VAL*     3.8     1.2    -      -       -      +
     28B  HIS*     3.1    47.5    +      -       +      +
     54B  MET*     4.4    12.5    -      -       +      +
     61B  ASN*     4.9     3.6    -      -       -      +
     64B  ILE*     4.3     9.7    -      -       +      +
     65B  GLN*     4.5    25.2    +      -       -      +
     68B  LEU*     3.5    15.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 25 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21B  GLU*     3.5    17.3    -      -       +      +
     22B  PHE      3.2     6.8    +      -       -      +
     24B  GLU*     1.3    76.8    -      -       +      +
     26B  ALA*     1.3    58.5    +      -       -      +
     28B  HIS*     3.3     3.3    +      -       -      +
     29B  LEU*     2.9    27.7    +      -       +      +
     47B  LYS*     4.0    35.4    -      -       +      -
     48B  TYR*     4.4    10.8    -      -       +      +
     52B  VAL*     3.9    32.1    -      -       +      -
     53B  GLN      4.9     0.3    -      -       -      +
     54B  MET*     4.1    18.0    -      -       +      +
    127B  ILE*     4.0    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 26 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22B  PHE*     2.8    20.9    +      -       +      +
     23B  LEU*     3.9     6.5    -      -       +      +
     25B  VAL*     1.3    76.3    -      -       -      +
     27B  VAL*     1.3    56.4    +      -       -      +
     29B  LEU*     3.3     3.3    +      -       -      +
     30B  ILE*     2.8    36.8    +      -       -      +
    100B  PHE*     4.0    22.2    -      -       +      -
    127B  ILE*     4.3    13.4    -      -       +      +
    130B  ILE*     3.9    21.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 27 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23B  LEU*     2.8    32.3    +      -       +      +
     24B  GLU      3.8     2.9    -      -       -      +
     26B  ALA*     1.3    68.9    -      -       +      +
     28B  HIS*     1.3    68.6    +      -       -      +
     30B  ILE*     3.2     8.8    +      -       -      +
     31B  LEU*     2.9    46.4    +      -       +      +
     64B  ILE*     4.0    26.9    -      -       +      -
     68B  LEU*     5.3     6.1    -      -       +      -
     83B  VAL*     6.3     1.8    -      -       +      -
     85B  VAL*     3.9    24.9    -      -       +      -
    100B  PHE*     6.1     0.7    -      -       +      -
    146B  PHE*     4.4    11.9    -      -       +      -
    148B  VAL*     5.0     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 28 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  GLU*     3.1    37.9    +      -       +      +
     25B  VAL      3.5     8.3    -      -       -      +
     27B  VAL*     1.3    77.1    -      -       -      +
     29B  LEU*     1.3    63.9    +      -       -      +
     31B  LEU*     3.3     6.5    +      -       +      +
     32B  TYR*     3.1    18.2    +      -       -      +
     42B  PHE*     3.5    11.3    -      +       -      -
     53B  GLN      3.7    12.1    -      -       -      +
     54B  MET*     3.5    28.0    -      -       +      +
     55B  SER*     2.8    38.2    +      -       -      -
     61B  ASN*     3.2    29.5    +      -       +      -
     64B  ILE*     3.7    26.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 29 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  VAL      2.9    17.6    +      -       -      +
     26B  ALA*     3.7     5.6    -      -       -      +
     27B  VAL      3.2     0.2    -      -       -      -
     28B  HIS*     1.3    73.6    -      -       -      +
     30B  ILE*     1.3    60.2    +      -       -      +
     32B  TYR*     3.4     4.7    +      -       +      +
     33B  VAL*     2.8    42.8    +      -       +      +
     51B  PRO      5.5     0.2    -      -       -      +
     52B  VAL*     4.6     7.6    -      -       +      -
     53B  GLN*     3.9    34.5    +      -       +      +
    127B  ILE*     3.7    34.3    -      -       +      +
    130B  ILE*     3.7    17.9    -      -       +      -
    131B  SER*     3.3    25.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 30 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  ALA      2.8    28.4    +      -       -      +
     27B  VAL*     3.6     4.3    -      -       -      +
     29B  LEU*     1.3    71.5    -      -       -      +
     31B  LEU*     1.3    66.6    +      -       +      +
     33B  VAL*     4.2     6.5    -      -       -      -
     34B  ARG*     3.0    29.3    +      -       +      +
     85B  VAL*     4.0    30.7    -      -       +      -
     87B  ILE*     4.2     6.5    -      -       +      -
     98B  PHE*     3.7    57.7    -      -       +      -
    100B  PHE*     4.2    13.0    -      -       +      -
    130B  ILE*     3.9    18.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 31 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  VAL*     2.9    35.1    +      -       +      +
     28B  HIS*     3.7     6.5    -      -       +      +
     30B  ILE*     1.3    82.7    -      -       +      +
     32B  TYR*     1.3    60.0    +      -       -      +
     35B  GLU*     3.4     1.7    +      -       -      -
     36B  VAL*     2.9    47.6    +      -       +      +
     37B  TYR*     3.9    18.3    +      -       +      -
     42B  PHE*     4.0    11.9    -      -       +      -
     60B  LEU*     4.5     5.2    -      -       +      -
     64B  ILE*     4.0    14.8    -      -       +      -
     85B  VAL*     5.1     2.5    -      -       +      -
     87B  ILE*     5.6     0.2    -      -       +      -
    146B  PHE*     3.5    51.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 32 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  HIS      3.1    12.5    +      -       -      +
     29B  LEU*     3.5     9.4    -      -       +      +
     31B  LEU*     1.3    75.2    -      -       -      +
     33B  VAL*     1.3    77.8    +      -       +      +
     35B  GLU*     3.0    22.2    +      -       -      +
     37B  TYR      5.1     1.0    -      -       -      +
     39B  VAL*     4.1    29.9    -      -       +      +
     42B  PHE*     3.6    41.6    -      +       +      -
     53B  GLN*     3.5    44.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 33 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  LEU*     2.8    36.1    +      -       +      +
     30B  ILE*     4.0     3.6    -      -       -      +
     32B  TYR*     1.3    93.5    -      -       +      +
     34B  ARG*     1.3    89.4    +      -       +      +
     35B  GLU*     3.2     1.5    +      -       -      +
     98B  PHE*     5.6     0.2    -      -       +      -
    130B  ILE*     3.6    26.2    -      -       +      +
    131B  SER*     4.0    20.9    -      -       -      +
    133B  CYS*     3.9     8.3    -      -       -      -
    134B  ASP*     4.3    15.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 34 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  ILE*     3.0    21.4    +      -       +      +
     33B  VAL*     1.3   103.8    +      -       +      +
     35B  GLU*     1.3    67.5    +      -       -      +
     36B  VAL*     3.4     5.2    +      -       +      +
     87B  ILE*     3.6    23.8    -      -       +      -
     96B  GLU*     2.8    39.9    +      -       -      +
     98B  PHE*     3.8    19.3    -      -       +      -
    133B  CYS*     4.3     1.1    -      -       -      -
    134B  ASP*     3.8    23.2    -      -       -      +
    137B  LEU*     3.5    18.4    +      -       -      +
    138B  ASP      2.9    23.6    +      -       -      -
    139B  HIS*     4.3     5.7    +      -       -      +
    140B  ASN*     3.6    30.4    +      -       -      +
    144B  CYS*     6.0     0.7    -      -       -      +
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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