Contacts of the helix formed by residues 92 - 117 (chain B) in PDB entry 2AXT


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 SER 92 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  VAL*     3.5     5.6    -      -       -      -
     73B  GLY      3.4    15.9    -      -       -      -
     75B  TRP*     3.0    38.7    +      -       -      -
     88B  PRO*     3.7    15.0    -      -       -      -
     90B  PHE      2.5     7.5    +      -       -      -
     91B  TRP*     1.3    73.2    -      -       -      +
     93B  PHE*     1.3    65.4    +      -       -      +
     94B  GLU*     3.1    13.8    +      -       -      -
     95B  GLY      2.9     8.8    +      -       -      -
     96B  VAL*     2.9    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  ALA*     4.9     0.5    -      -       -      +
     42B  LEU*     3.6    25.2    -      -       +      +
     55B  MET*     5.2     0.7    -      -       +      -
     63B  LEU*     3.6    33.0    -      -       +      -
     66B  MET*     3.7    30.4    -      -       +      +
     67B  ALA*     5.2     1.1    -      -       -      -
     71B  VAL*     3.3    33.1    -      -       +      +
     72B  THR*     3.8     7.9    -      -       -      -
     73B  GLY      3.1    35.9    +      -       -      -
     74B  SER*     4.4     0.7    -      -       -      -
     78B  TRP*     3.8    32.5    -      +       -      -
     80B  ILE*     4.3    13.5    -      -       +      -
     92B  SER*     1.3    74.6    -      -       -      +
     94B  GLU*     1.3    64.6    +      -       -      +
     96B  VAL*     3.5     3.9    +      -       -      +
     97B  ALA*     3.1    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  LEU*     5.1     2.7    -      -       +      +
     42B  LEU*     3.6    29.9    -      -       +      +
     74B  SER*     2.7    24.2    +      -       -      -
     75B  TRP*     2.6    62.0    +      -       +      +
     76B  SER*     4.8     2.7    +      -       -      -
     78B  TRP*     5.1     0.2    -      -       -      -
     92B  SER*     3.0     9.1    +      -       -      -
     93B  PHE*     1.3    76.9    -      -       -      +
     95B  GLY*     1.3    59.3    +      -       -      +
     97B  ALA*     3.4     4.3    +      -       -      +
     98B  LEU*     2.9    29.2    +      -       -      +
   5568a  LMT      4.4    29.5    -      -       +      +
   5489c  UNK      5.8     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75B  TRP*     3.9     5.3    -      -       -      -
     90B  PHE*     3.5    42.8    -      -       -      -
     91B  TRP*     4.3     0.7    -      -       -      -
     92B  SER*     2.9    11.9    +      -       -      -
     94B  GLU*     1.3    77.7    -      -       -      +
     96B  VAL*     1.3    60.3    +      -       -      +
     98B  LEU*     3.0     3.8    +      -       -      +
     99B  ALA*     2.8    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  MET*     3.8    18.4    -      -       -      -
     71B  VAL*     3.7    32.5    -      -       +      -
     91B  TRP*     4.3    12.0    -      -       +      -
     92B  SER      2.9    23.9    +      -       -      +
     93B  PHE      3.8     3.8    -      -       -      +
     95B  GLY*     1.3    70.4    -      -       -      +
     97B  ALA*     1.3    64.6    +      -       -      +
     99B  ALA*     3.4     1.6    +      -       -      +
    100B  HIS*     3.0    41.7    +      -       +      +
    515B  CLA      3.7    29.2    -      -       +      -
    516B  CLA      3.8    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 97 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  GLY*     3.8    14.4    -      -       -      +
     38B  ALA*     3.6    24.6    -      -       +      +
     39B  LEU*     3.6    27.4    -      -       +      -
     42B  LEU*     4.9     0.2    -      -       +      -
     93B  PHE      3.1    16.0    +      -       -      +
     94B  GLU      3.6     1.8    -      -       -      +
     96B  VAL*     1.3    81.3    -      -       -      +
     98B  LEU*     1.3    63.6    +      -       -      +
    100B  HIS*     3.4     2.9    +      -       -      +
    101B  ILE*     3.0    27.9    +      -       -      +
    515B  CLA      5.8     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  LEU*     5.4     0.6    -      -       -      +
     75B  TRP*     4.4     4.0    -      -       +      -
     90B  PHE*     3.5    28.9    -      -       +      -
     94B  GLU      2.9    14.5    +      -       -      +
     95B  GLY*     3.0     9.4    +      -       -      +
     97B  ALA*     1.3    73.3    -      -       -      +
     99B  ALA*     1.3    70.2    +      -       -      +
    101B  ILE*     2.8    25.0    +      -       +      +
    102B  VAL*     3.0    27.5    +      -       +      +
   5568a  LMT      3.6    46.4    -      -       +      -
   5486c  UNK      4.9    15.9    -      -       +      -
   5488c  UNK      5.2     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  PHE*     4.8     3.3    -      -       +      -
     91B  TRP*     3.8    13.5    -      -       +      -
     95B  GLY      2.8    18.4    +      -       -      +
     96B  VAL      3.6     4.9    -      -       -      +
     98B  LEU*     1.3    74.9    -      -       -      +
    100B  HIS*     1.3    63.8    +      -       -      +
    102B  VAL*     3.1    10.3    +      -       -      +
    103B  LEU*     2.9    21.7    +      -       -      +
    516B  CLA      3.7    42.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 100 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  ALA*     4.0    14.9    -      -       +      +
     34B  ALA*     3.3    25.7    -      -       +      +
     35B  GLY*     3.8    15.9    -      -       -      +
     96B  VAL*     3.0    36.3    +      -       +      +
     97B  ALA      3.6     7.9    -      -       -      +
     98B  LEU      2.9     1.4    +      -       -      -
     99B  ALA*     1.3    78.4    -      -       -      +
    101B  ILE*     1.3    62.9    +      -       -      +
    103B  LEU*     3.1     8.5    +      -       +      +
    104B  SER*     2.9    25.6    +      -       -      -
    515B  CLA      2.5    60.2    +      +       +      -
    516B  CLA      3.5    20.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 101 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  GLY*     4.2     9.2    -      -       -      +
     35B  GLY*     4.3     1.3    -      -       -      -
     36B  SER*     4.1    28.3    -      -       -      +
     39B  LEU*     4.6    16.6    -      -       +      -
     97B  ALA      3.0    17.3    +      -       -      +
     98B  LEU*     2.8    20.0    +      -       +      +
    100B  HIS*     1.3    72.3    -      -       -      +
    102B  VAL*     1.3    59.9    +      -       +      +
    104B  SER*     3.0    17.7    +      -       -      -
    105B  GLY      3.4     4.5    +      -       -      -
    528B  BCR      3.7    52.3    -      -       +      +
   5217t  LMT      5.0     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 102 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  LEU*     3.0    34.2    +      -       +      +
     99B  ALA*     3.3     7.6    -      -       -      +
    101B  ILE*     1.3    76.4    -      -       +      +
    103B  LEU*     1.3    57.9    +      -       -      +
    105B  GLY*     2.7    21.0    +      -       -      -
    106B  LEU*     3.0    21.7    +      -       +      +
    516B  CLA      3.8    19.7    -      -       +      -
    528B  BCR      3.3    24.6    -      -       +      +
   5486c  UNK      5.7     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  ALA*     4.7     5.8    -      -       +      -
     99B  ALA      2.9    12.2    +      -       -      +
    100B  HIS*     3.5     8.3    -      -       +      +
    102B  VAL*     1.3    74.0    -      -       -      +
    104B  SER*     1.3    60.1    +      -       -      +
    105B  GLY      3.0     0.2    +      -       -      -
    106B  LEU*     3.2     3.2    +      -       -      +
    107B  LEU*     2.8    44.3    +      -       +      +
    515B  CLA      3.8    42.0    -      -       +      -
    516B  CLA      3.4    37.8    -      -       +      +
    525B  CLA      4.6    11.9    -      -       +      -
    529B  BCR      3.8    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  ALA*     2.9    35.5    -      -       -      +
     31B  ALA*     3.6     7.4    -      -       -      +
     32B  GLY*     3.4    23.0    -      -       -      -
    100B  HIS      2.9     9.0    +      -       -      -
    101B  ILE      3.0    15.6    +      -       -      -
    103B  LEU*     1.3    77.5    -      -       -      +
    105B  GLY*     1.3    59.6    +      -       -      +
    108B  PHE*     3.2    14.8    +      -       -      +
    528B  BCR      3.8    11.6    -      -       -      +
    213t  SQD      3.2    18.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  ILE      3.4     0.8    +      -       -      -
    102B  VAL      2.7    13.5    +      -       -      -
    104B  SER*     1.3    80.7    +      -       -      +
    106B  LEU*     1.3    62.0    +      -       -      -
    108B  PHE*     3.2     6.1    +      -       -      +
    109B  LEU*     3.1    25.3    +      -       -      +
    528B  BCR      3.9    41.5    -      -       -      +
    213t  SQD      5.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102B  VAL*     3.0    18.9    +      -       +      +
    103B  LEU      3.7     4.5    -      -       -      +
    105B  GLY*     1.3    72.6    -      -       -      +
    107B  LEU*     1.3    62.4    +      -       -      +
    109B  LEU*     3.0    16.7    +      -       +      +
    110B  ALA*     2.8    31.4    +      -       -      +
    516B  CLA      4.1    33.0    -      -       +      -
    528B  BCR      4.7     7.4    -      -       +      +
    529B  BCR      3.7    57.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  LEU*     3.2    32.3    -      -       +      +
     27B  THR*     3.3    35.7    -      -       +      +
     28B  ALA*     3.5    25.4    -      -       +      +
    103B  LEU*     2.8    42.1    +      -       +      +
    104B  SER*     4.6     0.2    -      -       -      -
    106B  LEU*     1.3    75.9    -      -       -      +
    108B  PHE*     1.3    57.0    +      -       -      +
    110B  ALA*     3.8     3.9    -      -       -      +
    111B  ALA*     2.8    30.8    +      -       -      +
    515B  CLA      4.6     4.0    -      -       +      -
    525B  CLA      4.7     9.6    -      -       +      -
    526B  CLA      4.1    16.2    -      -       +      -
    529B  BCR      4.6     4.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  MET*     3.5    32.5    -      -       +      -
     28B  ALA*     3.8     5.3    -      -       -      +
    104B  SER      3.2    13.7    +      -       -      +
    105B  GLY*     3.2    11.3    +      -       -      +
    106B  LEU      3.1     0.6    -      -       -      -
    107B  LEU*     1.3    79.5    -      -       -      +
    109B  LEU*     1.3    75.2    +      -       +      +
    111B  ALA*     3.0    19.8    +      -       -      +
    112B  CYS*     3.3    16.8    +      -       -      -
    527B  BCR      4.5     9.9    -      -       +      -
    528B  BCR      4.9     0.9    -      -       +      -
    104t  BCR      4.3    28.7    -      -       +      -
    213t  SQD      3.8    37.2    -      -       +      -
   5015t  ALA*     6.5     0.4    -      -       +      -
   5018t  PHE*     3.9    37.5    -      +       -      -
   5019t  PHE*     4.8     4.7    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  GLY      3.5    14.1    -      -       -      +
    106B  LEU*     3.0    15.3    +      -       +      +
    108B  PHE*     1.3    85.3    -      -       +      +
    110B  ALA*     1.3    58.2    +      -       -      +
    112B  CYS*     2.7    27.2    +      -       -      +
    113B  TRP      3.2     9.4    +      -       -      -
    528B  BCR      4.0    23.8    -      -       +      -
    529B  BCR      3.9    43.5    -      -       +      +
    212a  SQD      5.0     9.9    -      -       +      +
    104t  BCR      3.7    26.9    -      -       +      -
   5018t  PHE*     4.6     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  LEU*     3.4    11.5    -      -       +      +
    106B  LEU      2.8    18.2    +      -       -      +
    107B  LEU      3.8     3.8    -      -       -      +
    109B  LEU*     1.3    73.9    -      -       -      +
    111B  ALA*     1.3    62.1    +      -       -      +
    112B  CYS      3.2     0.9    +      -       -      -
    113B  TRP*     3.4     6.8    +      -       -      +
    114B  HIS*     3.2    20.8    +      -       -      +
    526B  CLA      3.5    44.4    -      -       +      -
    529B  BCR      3.9    17.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21B  ALA*     3.8    16.1    -      -       -      +
     24B  LEU*     3.3    28.9    -      -       +      +
     25B  MET*     4.1    18.8    -      -       +      +
    107B  LEU      2.8    16.3    +      -       -      +
    108B  PHE*     3.1    15.0    -      -       -      +
    109B  LEU      3.0     0.4    -      -       -      -
    110B  ALA*     1.3    78.7    -      -       -      +
    112B  CYS*     1.3    58.7    +      -       -      +
    114B  HIS      4.2     0.7    -      -       -      -
    115B  TRP*     3.6    18.5    +      -       -      +
    527B  BCR      3.9     5.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 112 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  PHE*     3.3    23.0    +      -       -      -
    109B  LEU*     2.7    17.4    +      -       -      +
    111B  ALA*     1.3    70.0    -      -       -      +
    113B  TRP*     1.3    69.1    +      -       -      +
    114B  HIS      3.1     1.1    -      -       -      -
    115B  TRP*     2.6    18.8    +      -       -      +
    116B  VAL*     3.0    16.0    +      -       -      +
    527B  BCR      3.8    26.7    -      -       +      -
    529B  BCR      3.6    23.3    -      -       +      -
   5018t  PHE*     4.0    26.0    -      -       -      -
   5023t  PHE*     4.6     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  LEU      3.2     3.0    +      -       -      -
    110B  ALA*     3.8     7.9    -      -       -      +
    112B  CYS*     1.3    81.6    -      -       -      +
    114B  HIS*     1.3    95.7    +      +       -      +
    116B  VAL*     3.3     0.5    +      -       -      -
    117B  TYR*     3.0    56.6    +      +       +      +
    120B  LEU*     4.0    23.3    -      -       +      -
    526B  CLA      3.4    69.7    -      +       +      +
    529B  BCR      4.1    31.0    -      -       +      +
      3H  ARG*     5.8     3.6    -      -       -      -
      5H  THR*     5.4     3.4    -      -       +      -
    212a  SQD      2.8    42.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  GLY*     3.5    28.6    +      -       -      +
     20B  ILE*     3.9    14.1    -      -       +      +
     21B  ALA*     4.0     6.7    -      -       +      -
     24B  LEU*     3.6    28.3    -      -       +      -
    110B  ALA      3.2    12.2    +      -       -      +
    112B  CYS      3.1     1.0    -      -       -      -
    113B  TRP*     1.3    98.7    -      +       -      +
    115B  TRP*     1.3    59.6    +      -       -      +
    117B  TYR      3.7    11.6    +      -       -      +
    118B  TRP*     3.9     1.9    -      -       -      -
    120B  LEU*     4.4     8.9    -      -       +      +
    123B  PHE*     5.4     3.6    -      +       -      -
    526B  CLA      2.9    76.2    +      +       +      -
----------------------------------------------------------
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Residues in contact with TRP 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  ARG*     2.6    94.9    +      -       +      +
     21B  ALA*     3.6    16.2    -      -       +      -
     22B  ALA      5.2     0.7    -      -       -      -
    111B  ALA      3.6    12.9    +      -       -      +
    112B  CYS      2.6    17.9    +      -       -      +
    114B  HIS*     1.3    71.4    -      -       -      +
    116B  VAL*     1.3    72.9    +      -       +      +
    118B  TRP*     3.6     2.6    -      -       -      +
    524B  CLA      3.6    37.7    -      +       +      -
    527B  BCR      3.6    40.6    -      -       +      -
      7L  ARG*     3.6    22.0    -      -       -      -
    213t  SQD      4.0    31.8    +      -       -      -
   5023t  PHE*     5.6     2.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with VAL 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  ARG*     5.5     0.7    -      -       -      +
    112B  CYS*     3.0    10.3    +      -       -      +
    113B  TRP      3.9     3.8    -      -       -      +
    115B  TRP*     1.3    83.3    -      -       +      +
    117B  TYR*     1.3    77.5    +      -       +      +
    118B  TRP*     3.0    22.4    +      -       -      -
    529B  BCR      3.5    38.1    -      -       +      -
      1L  MET*     3.3    38.9    -      -       +      +
    213t  SQD      5.6     1.5    +      -       -      -
   5023t  PHE*     5.3     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  GLY*     5.5     0.2    -      -       -      -
    113B  TRP*     3.0    61.4    +      +       +      +
    114B  HIS*     3.7    12.2    +      -       -      +
    116B  VAL*     1.3    87.8    -      -       +      +
    118B  TRP*     1.3    59.0    +      -       -      +
    119B  ASP      3.5     2.7    -      -       -      +
    120B  LEU*     3.5    26.4    -      -       +      +
    123B  PHE*     5.4     0.2    -      -       -      -
    529B  BCR      3.6    14.0    -      -       +      +
      3H  ARG*     4.3    35.2    +      -       -      +
      1L  MET*     4.5    15.7    -      -       +      -
    212a  SQD      3.0    31.2    +      -       -      -
----------------------------------------------------------
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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