Contacts of the helix formed by residues 36 - 59 (chain B) in PDB entry 1RVA


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 ASP 36 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  GLN*     3.7    29.6    -      -       +      +
     34B  GLY*     4.2     1.2    -      -       -      -
     35B  SER*     1.3    81.0    +      -       -      +
     37B  THR*     1.3    57.9    +      -       -      +
     38B  LYS*     3.0    26.7    -      -       -      +
     39B  VAL*     2.8    41.0    +      -       -      +
     40B  LEU*     3.2     9.2    +      -       -      +
    138B  TYR*     4.1     0.4    -      -       -      -
    140B  ARG*     6.1     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 37 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  GLN*     3.2    21.1    +      -       -      +
     36B  ASP*     1.3    69.3    -      -       -      +
     38B  LYS*     1.3    59.5    +      -       -      +
     40B  LEU*     3.7     4.9    -      -       -      +
     41B  SER*     2.8    34.4    +      -       -      -
     93B  THR*     4.0    27.4    -      -       +      +
     95B  TYR*     4.2     0.9    -      -       -      -
    138B  TYR*     2.6    25.4    +      -       +      +
      8D    T      3.5    26.9    -      -       -      +
      9D    C      2.6    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 38 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  LYS*     5.5    14.6    -      -       +      +
     41A  SER*     5.0    11.4    -      -       -      -
     42A  THR*     3.6    11.6    +      -       -      +
     69A  GLN*     4.1     4.6    -      -       -      +
     36B  ASP*     3.1    22.6    -      -       +      +
     37B  THR*     1.3    79.7    -      -       -      +
     39B  VAL*     1.3    59.8    +      -       +      +
     41B  SER*     3.5     7.6    +      -       -      -
     42B  THR*     3.3    18.2    +      -       -      -
      6C    T      5.6     5.6    +      -       +      +
      7C    A      3.3    51.3    +      -       -      -
      8C    T      5.8     1.4    -      -       -      -
      7D    A      5.7     6.4    +      -       +      -
      8D    T      6.5     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 39 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42A  THR*     3.9    16.4    -      -       +      +
     45A  GLU*     5.9     3.4    -      -       +      -
     46A  LEU*     4.1    32.3    -      -       +      -
     33B  LEU*     4.4     7.6    -      -       +      -
     34B  GLY*     3.8    29.8    -      -       -      +
     36B  ASP*     2.8    28.2    +      -       -      +
     38B  LYS*     1.3    78.5    -      -       +      +
     40B  LEU*     1.3    62.9    +      -       +      +
     42B  THR*     3.3     6.9    +      -       -      -
     43B  ILE*     3.1    31.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 40 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  LEU*     4.8     3.1    -      -       +      -
     34B  GLY      4.6     4.0    -      -       -      +
     35B  SER      3.9    13.2    -      -       -      +
     36B  ASP      3.2     7.8    +      -       -      +
     37B  THR      4.3     1.3    -      -       -      +
     39B  VAL*     1.3    79.7    -      -       +      +
     41B  SER*     1.3    65.1    +      -       -      +
     43B  ILE*     3.3    14.6    +      -       +      +
     44B  PHE*     2.9    45.9    +      -       +      -
     93B  THR*     4.6     0.2    -      -       -      -
    138B  TYR*     3.3    49.4    -      -       +      +
    162B  PRO*     4.1    22.7    -      -       +      +
    163B  TYR*     3.9    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 41 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  LYS*     3.9    19.4    +      -       -      -
     37B  THR*     2.8    27.5    +      -       -      +
     38B  LYS*     3.5     8.0    +      -       -      -
     40B  LEU*     1.3    72.8    -      -       -      +
     42B  THR*     1.3    59.2    +      -       -      +
     44B  PHE*     3.9     1.0    -      -       -      +
     45B  GLU*     3.0    35.8    +      -       -      +
     93B  THR*     3.5    26.9    +      -       -      +
      8D    T      3.9    21.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 42 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  LYS*     3.4    21.6    +      -       -      +
     39A  VAL*     4.0    30.5    -      -       +      +
     42A  THR*     3.1    37.1    +      -       +      -
     43A  ILE*     4.8     1.8    -      -       +      -
     38B  LYS      3.3     6.1    +      -       -      -
     39B  VAL      3.3     9.8    +      -       -      -
     40B  LEU      3.2     0.2    -      -       -      -
     41B  SER*     1.3    81.0    +      -       -      +
     43B  ILE*     1.3    68.3    +      -       +      +
     45B  GLU*     3.3     7.6    +      -       -      +
     46B  LEU*     3.1    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 43 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  ILE*     3.7    26.2    -      -       +      +
     42A  THR*     4.7     6.1    -      -       +      -
     43A  ILE*     5.2     1.3    -      -       +      -
     46A  LEU*     5.0     2.5    -      -       +      -
     20B  VAL*     3.9    34.3    -      -       +      -
     23B  ILE*     5.1     1.1    -      -       +      -
     33B  LEU*     4.0    29.6    -      -       +      -
     39B  VAL*     3.1    25.8    +      -       +      +
     40B  LEU*     3.3    15.0    +      -       +      +
     42B  THR*     1.3    87.3    -      -       +      +
     44B  PHE*     1.3    76.0    +      -       +      +
     46B  LEU*     3.4     2.3    +      -       +      -
     47B  PHE*     2.9    27.4    +      -       -      +
    163B  TYR*     5.6     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 44 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15B  ASN*     5.2     2.5    -      -       -      -
     20B  VAL*     5.9     2.2    -      -       +      -
     40B  LEU*     2.9    38.3    +      -       +      +
     41B  SER      4.1     2.5    -      -       -      +
     43B  ILE*     1.3    83.9    -      -       +      +
     45B  GLU*     1.3    61.1    +      -       -      +
     47B  PHE*     3.7    12.1    -      +       +      +
     48B  SER*     2.7    33.3    +      -       -      -
     91B  ILE*     4.3     3.3    -      -       +      +
     93B  THR*     3.8    21.1    -      -       +      +
    136B  TYR*     3.8    41.3    -      +       +      -
    138B  TYR*     4.0    27.8    -      +       +      -
    163B  TYR*     4.8     8.7    -      +       -      -
    166B  VAL*     3.9    35.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 45 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  LYS*     3.7    20.8    +      -       +      +
     39A  VAL*     5.7     5.2    -      -       +      -
     41B  SER*     3.0    28.8    +      -       -      +
     42B  THR*     3.5     7.6    -      -       -      +
     44B  PHE*     1.3    76.3    -      -       -      +
     46B  LEU*     1.3    64.2    +      -       +      +
     48B  SER*     3.2    12.0    +      -       -      -
     49B  ARG*     3.2    21.4    +      -       +      +
     74B  ASP*     2.9    38.6    -      -       -      +
     75B  PHE*     4.5     2.9    -      -       -      -
     91B  ILE*     3.2    38.2    -      -       +      +
      7D    A      5.4     2.4    -      -       -      +
      8D    T      5.5     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 46 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  ILE*     4.1    24.7    -      -       +      -
     31A  TYR*     4.1     8.0    -      -       +      +
     32A  PRO*     3.7    15.8    -      -       -      +
     33A  LEU*     3.9    26.0    -      -       +      -
     34A  GLY*     3.5    27.8    -      -       -      +
     39A  VAL*     4.2    20.2    -      -       +      -
     43A  ILE*     4.9     1.8    -      -       +      -
     42B  THR*     3.1    25.8    +      -       +      +
     43B  ILE      3.8     3.6    -      -       -      +
     45B  GLU*     1.3    82.1    -      -       +      +
     47B  PHE*     1.3    61.2    +      -       -      +
     49B  ARG*     3.5    19.9    +      -       -      +
     50B  PRO*     3.2    20.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  ILE*     4.3     1.1    -      -       -      +
     31A  TYR*     3.2    47.9    -      +       -      -
     11B  LEU      5.7     0.2    -      -       -      -
     14B  GLU*     3.6    38.4    -      -       +      -
     15B  ASN*     4.1    22.7    -      -       +      -
     18B  TYR*     3.9    21.3    -      -       +      -
     20B  VAL*     3.7    25.6    -      -       +      -
     43B  ILE      2.9    17.6    +      -       -      +
     44B  PHE*     3.7    13.5    -      +       +      +
     46B  LEU*     1.3    76.2    -      -       -      +
     48B  SER*     1.3    59.9    +      -       -      +
     50B  PRO*     3.5     9.2    -      -       -      +
     51B  ILE*     3.6    17.2    -      -       +      +
    136B  TYR*     3.9    20.9    -      +       -      -
----------------------------------------------------------
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Residues in contact with SER 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11B  LEU*     4.9     4.9    -      -       -      +
     44B  PHE      2.7    16.2    +      -       -      -
     45B  GLU      3.6     0.4    -      -       -      -
     46B  LEU      3.2     0.2    -      -       -      -
     47B  PHE*     1.3    78.4    -      -       -      +
     49B  ARG*     1.3    64.6    +      -       -      +
     50B  PRO      3.4     0.2    -      -       -      -
     51B  ILE*     3.2    13.1    +      -       -      +
     52B  ILE*     3.0    33.3    +      -       -      +
     91B  ILE*     3.4    26.4    -      -       -      +
    134B  ILE*     5.3     1.3    -      -       -      -
    136B  TYR*     2.7    32.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  PRO*     4.1    16.2    +      -       -      +
     33A  LEU      4.1     6.7    +      -       -      -
     34A  GLY*     4.4    16.9    -      -       -      -
    143A  THR*     3.8    17.6    +      -       -      +
    147A  SER*     3.2    24.9    +      -       -      -
    148A  LEU*     3.5    25.1    -      -       +      +
     45B  GLU*     3.2    15.1    +      -       +      +
     46B  LEU*     4.0    22.1    +      -       -      +
     48B  SER*     1.3    74.7    -      -       -      +
     50B  PRO*     1.3    71.2    -      -       +      +
     52B  ILE*     3.8     2.0    -      -       -      +
     53B  ASN*     3.0    24.9    +      -       -      +
     65B  GLU*     2.9    36.8    +      -       -      -
     75B  PHE*     3.3    31.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 50 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31A  TYR*     3.7    20.2    -      -       +      -
     32A  PRO*     4.6     8.5    -      -       +      -
    147A  SER      5.3     0.4    -      -       -      +
    148A  LEU*     3.5    25.1    -      -       -      +
    149A  LYS*     4.4     7.6    -      -       -      +
    150A  THR*     3.9    25.4    -      -       +      +
     14B  GLU*     6.0     0.2    -      -       -      +
     46B  LEU      3.2    15.3    -      -       -      +
     47B  PHE      3.5     9.6    -      -       -      +
     49B  ARG*     1.3    93.5    -      -       +      +
     51B  ILE*     1.3    61.8    +      -       +      +
     53B  ASN*     3.9     1.6    -      -       -      +
     54B  LYS*     3.0    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  LEU*     4.4     4.3    -      -       +      -
     10B  ALA*     3.6    35.7    -      -       +      +
     11B  LEU*     4.0    26.9    -      -       +      +
     14B  GLU*     3.5    42.0    -      -       +      +
     47B  PHE*     3.6    28.7    -      -       +      +
     48B  SER*     3.2     8.9    +      -       -      +
     50B  PRO*     1.3    76.2    -      -       +      +
     52B  ILE*     1.3    63.9    +      -       -      +
     54B  LYS*     3.2     8.2    +      -       +      +
     55B  ILE*     3.1    24.7    +      -       -      +
    136B  TYR*     4.8     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  LEU*     4.1    24.4    -      -       +      +
     11B  LEU*     5.4     1.1    -      -       +      -
     48B  SER*     3.0    23.0    +      -       -      +
     49B  ARG*     3.8     4.0    -      -       -      +
     51B  ILE*     1.3    78.7    -      -       +      +
     53B  ASN*     1.3    60.0    +      -       -      +
     55B  ILE*     3.4     1.6    +      -       -      +
     56B  ALA*     2.9    30.8    +      -       -      +
     63B  VAL*     4.5     4.0    -      -       +      -
     75B  PHE*     3.6    45.5    -      -       +      -
     77B  LEU*     4.2    28.3    -      -       +      +
     89B  ILE*     4.3     9.2    -      -       +      -
     91B  ILE*     4.4     0.4    -      -       +      -
    134B  ILE*     4.0    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  LYS*     5.6     3.8    +      -       -      +
    148A  LEU*     3.7    46.9    +      -       +      +
     49B  ARG      3.0    18.1    +      -       -      +
     50B  PRO      3.9     3.1    -      -       -      +
     52B  ILE*     1.3    77.7    -      -       -      +
     54B  LYS*     1.3    65.0    +      -       -      +
     56B  ALA*     3.8     0.3    -      -       -      +
     57B  GLU*     3.0    45.3    +      -       -      +
     63B  VAL*     3.8    28.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  PRO      3.0    18.1    +      -       -      +
     51B  ILE*     3.6     7.6    -      -       +      +
     53B  ASN*     1.3    79.1    -      -       -      +
     55B  ILE*     1.3    74.7    +      -       +      +
     57B  GLU*     3.4     6.4    +      -       -      +
     58B  LYS*     3.2    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3B  LEU*     3.9    17.3    -      -       +      +
      6B  ASP*     3.8    33.2    -      -       +      +
      7B  LEU*     3.8    20.6    -      -       +      +
     10B  ALA*     3.9    29.8    -      -       +      -
     51B  ILE*     3.1    16.4    +      -       +      +
     52B  ILE      4.0     2.2    -      -       -      +
     54B  LYS*     1.3    88.5    -      -       +      +
     56B  ALA*     1.3    62.6    +      -       -      +
     58B  LYS*     3.3    18.2    +      -       +      +
     59B  HIS*     3.1    27.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3B  LEU*     4.1    10.5    -      -       -      +
     52B  ILE      2.9    18.6    +      -       -      +
     53B  ASN      3.8     0.7    -      -       -      +
     55B  ILE*     1.3    74.2    -      -       -      +
     57B  GLU*     1.3    65.8    +      -       -      +
     59B  HIS*     3.0     8.0    +      -       -      -
     61B  TYR*     2.9    31.7    +      -       +      +
     63B  VAL*     3.4    29.6    -      -       +      -
     77B  LEU*     3.9    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  LYS*     3.7    27.7    +      -       -      +
     53B  ASN*     3.0    39.3    +      -       -      +
     54B  LYS*     3.7     6.5    -      -       -      +
     56B  ALA*     1.3    76.5    -      -       +      +
     58B  LYS*     1.3    64.7    +      -       -      +
     59B  HIS      2.9     1.7    +      -       -      -
     60B  GLY*     3.0    13.7    +      -       -      +
     61B  TYR      4.1     8.3    +      -       -      +
     63B  VAL*     6.2     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  ASP*     2.9    34.5    +      -       -      +
     54B  LYS*     3.2    10.5    +      -       +      +
     55B  ILE*     3.4    21.0    -      -       +      +
     56B  ALA      3.2     0.4    -      -       -      -
     57B  GLU*     1.3    77.6    -      -       -      +
     59B  HIS*     1.3    68.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  SER*     3.6    22.4    -      -       -      -
      3B  LEU*     3.7    21.6    +      -       +      +
      6B  ASP*     2.7    32.1    +      -       -      +
     55B  ILE*     3.1    26.9    +      -       +      +
     56B  ALA      3.0     3.8    +      -       -      +
     57B  GLU      3.0     1.0    -      -       -      -
     58B  LYS*     1.3    92.2    +      -       +      +
     60B  GLY*     1.3    61.3    +      -       -      +
     61B  TYR*     3.3    27.3    -      -       +      -
     79B  LYS*     3.6    14.2    +      -       -      -
----------------------------------------------------------
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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