Contacts of the helix formed by residues 30 - 53 (chain B) in PDB entry 3W7F


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with PRO 30 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  LEU      4.5     1.3    -      -       -      +
     29B  LEU*     1.3    97.9    -      -       +      +
     31B  GLU*     1.3    65.6    +      -       -      +
     32B  ASP*     3.4     3.6    -      -       +      +
     33B  GLN*     3.1    32.2    +      -       -      +
     34B  ARG*     3.0    17.3    +      -       -      +
    236B  GLU*     3.8    30.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 31 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  LEU      3.6     0.8    +      -       -      -
     30B  PRO*     1.3    72.6    -      -       -      +
     32B  ASP*     1.3    66.5    +      -       -      +
     34B  ARG*     3.1    40.2    +      -       -      +
     35B  LYS*     3.2    52.2    +      -       +      +
     38B  TRP*     4.8     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 32 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  PRO*     3.4     2.3    -      -       +      +
     31B  GLU*     1.3    82.2    -      -       -      +
     33B  GLN*     1.3    63.6    +      -       +      +
     35B  LYS*     3.8    12.1    +      -       -      +
     36B  ALA*     3.5    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 33 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  LEU*     4.1    18.6    -      -       +      +
     30B  PRO*     3.1    36.8    +      -       -      +
     32B  ASP*     1.3    79.4    -      -       +      +
     34B  ARG*     1.3    64.5    +      -       -      +
     36B  ALA*     3.3     4.5    +      -       -      +
     37B  VAL*     3.1    24.8    +      -       -      +
    144B  ILE*     3.6    34.0    +      -       +      +
    145B  LEU*     4.6     1.1    -      -       +      +
    234B  SER*     3.4    26.5    +      -       -      -
    236B  GLU*     4.6     7.0    +      -       -      +
    237B  ALA*     4.2    12.3    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     12B  HIS*     5.2     4.2    -      -       -      -
     26B  PHE      3.5    18.6    -      -       -      +
     27B  ASP*     3.7    24.6    +      -       -      +
     29B  LEU*     3.4    27.8    +      -       +      +
     30B  PRO      3.0    10.4    +      -       -      +
     31B  GLU*     3.1    35.7    +      -       -      +
     33B  GLN*     1.3    74.4    -      -       -      +
     35B  LYS*     1.3    68.7    +      -       -      +
     37B  VAL*     3.2     3.4    +      -       -      +
     38B  TRP*     3.0    63.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 35 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5B  ASP*     4.8    13.9    -      -       -      +
      8B  PHE*     3.3    56.3    -      -       +      -
     31B  GLU*     3.2    44.7    +      -       +      +
     32B  ASP*     3.9    11.9    +      -       -      +
     34B  ARG*     1.3    77.8    -      -       -      +
     36B  ALA*     1.3    62.5    +      -       -      +
     38B  TRP*     3.3    32.5    +      -       +      +
     39B  ALA      3.1    17.3    +      -       -      -
     92B  HIS*     4.8     6.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 36 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  PHE*     4.4     0.4    -      -       -      -
     32B  ASP      3.5    10.9    +      -       -      +
     33B  GLN      3.3     7.9    +      -       -      +
     34B  ARG      3.3     0.4    -      -       -      -
     35B  LYS*     1.3    78.3    -      -       -      +
     37B  VAL*     1.3    58.3    +      -       -      +
     39B  ALA*     3.4     2.6    +      -       -      +
     40B  ILE*     3.0    34.0    +      -       -      +
     93B  VAL*     3.8    36.3    -      -       +      +
     97B  LYS*     5.6     1.1    -      -       +      -
    144B  ILE*     3.8    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 37 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15B  MET*     4.2    14.8    -      -       +      -
     26B  PHE*     4.0    31.0    -      -       +      -
     29B  LEU*     3.8    19.5    -      -       +      -
     33B  GLN      3.1    19.3    +      -       -      +
     34B  ARG*     3.2    10.0    +      -       -      +
     36B  ALA*     1.3    75.0    -      -       -      +
     38B  TRP*     1.3    61.0    +      -       +      +
     40B  ILE*     3.2     7.1    +      -       -      +
     41B  TYR*     2.8    28.8    +      -       -      +
    141B  LEU*     4.2    22.2    -      -       +      -
    144B  ILE*     4.4     9.4    -      -       +      -
    145B  LEU*     4.4     5.6    -      -       +      -
    301B  FPS      4.8     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 38 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  PHE*     3.3    30.5    -      -       +      -
      9B  LYS*     4.9     4.9    -      -       -      -
     11B  CYS*     3.6     8.0    -      -       +      +
     12B  HIS*     3.3    60.2    -      +       +      +
     15B  MET*     4.0    17.5    -      -       -      -
     26B  PHE*     5.4     1.3    +      -       +      -
     27B  ASP*     3.0    22.8    +      -       -      -
     31B  GLU*     4.8     3.8    -      -       -      -
     34B  ARG*     3.0    62.6    +      -       +      +
     35B  LYS*     3.3    33.4    +      -       +      +
     37B  VAL*     1.3    77.0    -      -       +      +
     39B  ALA*     1.3    58.5    +      -       -      +
     41B  TYR*     3.3     6.3    +      -       -      +
     42B  ALA*     2.9    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 39 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  PHE*     3.9    18.4    -      -       +      -
     11B  CYS*     3.9    12.5    -      -       -      +
     35B  LYS      3.1     9.8    +      -       -      +
     36B  ALA      3.6     8.5    -      -       -      +
     38B  TRP*     1.3    79.5    -      -       -      +
     40B  ILE*     1.3    63.3    +      -       -      +
     42B  ALA*     3.3     1.6    +      -       -      +
     43B  VAL*     3.0    29.3    +      -       -      +
     86B  ILE*     4.3     0.4    -      -       -      +
     89B  ALA*     3.9    17.3    -      -       +      -
     90B  LEU*     4.2     7.9    -      -       +      +
     93B  VAL*     4.1    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 40 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36B  ALA*     3.0    27.4    +      -       +      +
     37B  VAL*     3.2     4.0    +      -       -      +
     39B  ALA*     1.3    77.1    -      -       +      +
     41B  TYR*     1.3    63.4    +      -       -      +
     43B  VAL*     3.4     6.6    +      -       -      +
     44B  CYS*     3.0    29.8    +      -       -      -
     90B  LEU*     4.6    10.3    -      -       +      -
     93B  VAL*     5.0     4.9    -      -       +      -
     99B  ILE*     5.7     4.3    -      -       +      -
    104B  PHE*     4.4    14.4    -      -       +      -
    140B  VAL*     3.6    36.1    -      -       +      +
    141B  LEU*     4.0    14.8    -      -       +      -
    144B  ILE*     3.7    29.8    -      -       +      -
    301B  FPS      4.0    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 41 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14B  ILE      4.1     2.7    -      -       -      -
     15B  MET*     3.6    50.7    -      -       +      -
     18B  HIS*     3.5     0.9    -      -       -      +
     19B  SER*     3.2    26.0    +      -       -      -
     22B  PHE*     5.9     0.2    -      +       -      -
     37B  VAL      2.8    17.1    +      -       -      +
     38B  TRP      3.5     3.6    -      -       -      +
     40B  ILE*     1.3    78.1    -      -       -      +
     42B  ALA*     1.3    61.0    +      -       -      +
     44B  CYS*     3.0     3.6    +      -       -      +
     45B  ARG*     2.8    66.5    +      -       +      +
    301B  FPS      3.5    53.5    -      -       +      +
    302B  FPS      2.4    30.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 42 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11B  CYS*     3.7    32.3    -      -       +      +
     14B  ILE*     4.2    13.2    -      -       +      -
     38B  TRP      2.9    17.7    +      -       -      +
     39B  ALA      3.6     4.5    -      -       -      +
     41B  TYR*     1.3    75.2    -      -       -      +
     43B  VAL*     1.3    58.2    +      -       -      +
     45B  ARG*     3.5     5.6    -      -       -      +
     46B  LYS*     3.0    35.3    +      -       -      +
     86B  ILE*     3.9    17.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 43 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  ALA      3.0    17.7    +      -       -      +
     40B  ILE      3.7     5.8    -      -       -      +
     42B  ALA*     1.3    77.0    -      -       -      +
     44B  CYS*     1.3    60.9    +      -       -      +
     46B  LYS*     3.7     4.7    +      -       -      +
     47B  ILE*     3.2    37.9    +      -       +      +
     63B  ILE*     4.5     0.8    -      -       +      +
     67B  ILE*     4.1    15.5    -      -       +      -
     86B  ILE*     3.2    26.0    -      -       +      -
     87B  MET*     4.4    12.6    -      -       +      -
     90B  LEU*     4.1    28.9    -      -       +      -
    104B  PHE*     4.0    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 44 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  ILE*     3.0    27.6    +      -       -      -
     41B  TYR      3.6     5.4    -      -       -      +
     43B  VAL*     1.3    75.0    -      -       -      +
     45B  ARG*     1.3    57.8    +      -       -      +
     47B  ILE*     3.3    10.4    +      -       -      +
     48B  ASP*     2.9    32.6    +      -       -      +
    104B  PHE*     4.0    16.8    -      -       -      -
    107B  LEU*     3.8    19.1    -      -       +      +
    137B  VAL*     4.0    16.8    -      -       -      -
    140B  VAL*     5.0     1.8    -      -       -      -
    301B  FPS      3.5    30.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 45 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14B  ILE*     3.8    18.4    -      -       +      -
     18B  HIS*     3.4    36.8    +      -       +      +
     41B  TYR*     2.8    46.6    +      -       +      +
     42B  ALA*     3.5     7.4    -      -       -      +
     44B  CYS*     1.3    74.8    -      -       -      +
     46B  LYS*     1.3    69.3    +      -       +      +
     48B  ASP*     3.0    18.2    +      -       -      +
     49B  ASP*     2.9    50.0    +      -       -      +
    301B  FPS      2.8    65.0    +      -       +      +
    302B  FPS      3.6     7.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 46 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  VAL      4.2     5.3    +      -       -      -
     54A  TYR*     4.1    19.8    +      -       -      +
     10B  TYR*     3.9     9.1    +      -       -      -
     14B  ILE*     3.7    26.0    -      -       +      +
     42B  ALA      3.0    20.4    +      -       -      +
     43B  VAL*     3.9     5.6    -      -       -      +
     45B  ARG*     1.3    79.5    -      -       +      +
     47B  ILE*     1.3    53.2    +      -       -      +
     49B  ASP*     3.4     3.5    +      -       +      +
     50B  SER*     2.8    35.3    +      -       -      -
     54B  TYR*     3.4    30.5    +      -       +      +
     59B  PHE*     4.3    11.1    -      -       +      -
     63B  ILE*     3.9    15.8    -      -       +      +
     83B  ASP*     3.8    15.4    +      -       +      +
     86B  ILE*     3.3    20.4    -      -       +      -
     87B  MET*     6.3     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  VAL*     3.2    33.5    +      -       +      +
     44B  CYS*     3.5    11.7    -      -       -      +
     45B  ARG      3.2     0.6    -      -       -      -
     46B  LYS*     1.3    76.9    -      -       -      +
     48B  ASP*     1.3    66.5    +      -       -      +
     50B  SER*     3.1    16.9    +      -       -      -
     60B  LEU*     3.7    15.3    -      -       +      -
     63B  ILE*     3.7    27.8    -      -       +      -
     67B  ILE*     4.4     2.9    -      -       +      -
    104B  PHE*     4.4     6.3    -      -       +      -
    107B  LEU*     4.3    14.1    -      -       +      -
    108B  ILE*     3.8    31.0    -      -       +      -
    111B  VAL*     3.4    27.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  CYS      2.9    14.6    +      -       -      +
     45B  ARG*     3.0    19.6    +      -       -      +
     47B  ILE*     1.3    78.3    -      -       -      +
     49B  ASP*     1.3    62.2    +      -       -      +
     50B  SER      3.4     0.2    +      -       -      -
     51B  ILE*     3.5     2.1    +      -       -      +
     52B  ASP*     2.9    43.5    +      -       -      +
    111B  VAL*     4.3    15.7    -      -       -      +
    301B  FPS      2.8    36.1    +      -       +      +
    305B   MG      2.2    31.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  HIS*     3.7    25.3    +      -       -      -
     45B  ARG*     2.9    45.2    +      -       -      +
     46B  LYS*     3.9     2.1    -      -       -      +
     48B  ASP*     1.3    78.0    -      -       -      +
     50B  SER*     1.3    59.3    +      -       -      +
     51B  ILE      3.0     3.1    -      -       -      -
     52B  ASP*     4.0     1.5    -      -       -      +
     53B  VAL*     3.0    27.5    +      -       +      +
     54B  TYR*     2.8    58.7    +      -       +      +
    301B  FPS      4.6     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 50 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  LYS      2.8    20.0    +      -       -      -
     47B  ILE      3.1    15.5    +      -       -      -
     48B  ASP      3.3     0.4    -      -       -      -
     49B  ASP*     1.3    73.6    -      -       -      +
     51B  ILE*     1.3    58.8    +      -       -      +
     54B  TYR*     3.6     4.0    -      -       -      +
     55B  GLY      3.3     4.3    +      -       -      -
     56B  ASP*     2.9    29.6    +      -       -      +
     59B  PHE*     3.5    29.2    -      -       -      -
     60B  LEU*     3.1    39.4    -      -       -      +
     63B  ILE*     4.5     1.6    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     48B  ASP      3.5     1.0    +      -       -      -
     49B  ASP      3.0     0.2    -      -       -      -
     50B  SER*     1.3    79.6    +      -       -      +
     52B  ASP*     1.3    61.2    +      -       -      +
     53B  VAL*     2.8    15.3    +      -       -      -
     55B  GLY*     3.3    18.6    +      -       -      +
     56B  ASP      4.2     0.7    -      -       -      +
     57B  ILE*     3.7    42.2    -      -       +      +
     60B  LEU*     3.7    19.1    -      -       +      -
    111B  VAL*     3.7    39.9    -      -       +      +
    112B  TYR*     4.6     3.4    -      -       +      -
    114B  ASP*     5.2     2.2    -      -       +      +
    115B  GLN*     3.6    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13A  LYS*     4.5    14.9    +      -       -      -
     48B  ASP*     2.9    31.2    +      -       -      +
     49B  ASP*     4.0     2.9    -      -       -      +
     51B  ILE*     1.3    85.6    -      -       -      +
     53B  VAL*     1.3    68.6    +      -       +      +
    111B  VAL*     5.0     4.0    -      -       -      +
    114B  ASP*     5.4     8.3    -      -       -      +
    301B  FPS      3.9     1.1    +      -       -      +
    305B   MG      2.2    32.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  TYR*     4.3    15.1    +      -       -      -
     46A  LYS*     4.0    21.5    +      -       -      +
     54A  TYR*     4.5     9.2    -      -       +      +
     83A  ASP*     4.9     2.1    -      -       -      +
     85A  ARG*     5.8     1.2    +      -       -      -
     49B  ASP*     3.0    31.4    +      -       +      +
     51B  ILE      2.8     5.4    +      -       -      -
     52B  ASP*     1.3    85.5    -      -       +      +
     54B  TYR*     1.3    80.7    +      -       +      +
     55B  GLY      3.3     4.5    +      -       -      -
----------------------------------------------------------
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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