Contacts of the helix formed by residues 34 - 57 (chain B) in PDB entry 4TZM


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 34 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  ILE*     4.3     4.0    -      -       -      +
     33B  SER*     1.3    85.9    +      -       -      +
     35B  PRO*     1.4    74.4    -      -       +      +
     36B  ASP*     3.0    14.4    +      -       -      +
     37B  ARG*     3.0    46.4    +      -       -      +
     38B  SER*     3.0    20.6    +      -       -      -
    239B  HIS*     3.4     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 35 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34B  ASP*     1.4    88.1    -      -       +      +
     36B  ASP*     1.3    61.4    +      -       -      +
     38B  SER*     3.9     2.0    -      -       -      -
     39B  SER*     2.8    27.5    +      -       -      -
    134B  ASN      5.4     2.2    -      -       -      +
    239B  HIS*     3.1    39.0    -      -       +      +
    240B  HIS*     3.8     6.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 36 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  GLN*     2.9    34.7    +      -       -      +
     34B  ASP*     3.0     8.9    +      -       -      +
     35B  PRO*     1.3    80.9    -      -       -      +
     37B  ARG*     1.3    66.3    +      -       +      +
     39B  SER*     3.2     4.9    +      -       -      -
     40B  ASN*     3.1    34.3    +      -       -      +
    101B  LYS*     3.8    17.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 37 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  PRO*     4.1     8.3    -      -       +      +
     31B  ILE*     3.1    60.8    -      -       -      +
     32B  VAL*     4.0     2.0    -      -       -      +
     34B  ASP*     3.0    36.8    +      -       -      +
     36B  ASP*     1.3    78.9    -      -       -      +
     38B  SER*     1.3    57.2    +      -       -      +
     40B  ASN*     3.3    13.6    +      -       -      +
     41B  PHE*     2.8    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 38 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  VAL*     3.6    18.3    +      -       -      +
     34B  ASP      3.0    17.2    +      -       -      -
     35B  PRO*     3.8     5.6    -      -       -      -
     37B  ARG*     1.3    79.1    -      -       -      +
     39B  SER*     1.3    60.0    +      -       -      +
     41B  PHE*     3.5     3.9    +      -       -      +
     42B  MET*     3.3    24.6    +      -       -      +
    237B  PRO*     3.4    15.9    -      -       -      +
    239B  HIS      2.9    21.8    +      -       -      -
    240B  HIS*     2.7    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 39 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  PRO      2.8    14.0    +      -       -      -
     36B  ASP*     3.2    10.0    +      -       -      -
     38B  SER*     1.3    76.1    -      -       -      +
     40B  ASN*     1.3    65.0    +      -       -      +
     42B  MET*     3.2     7.8    +      -       -      +
     43B  ILE*     3.0    29.5    +      -       -      +
    100B  THR*     4.2     1.9    +      -       -      -
    101B  LYS*     3.3    43.2    -      -       -      +
    240B  HIS*     3.5    22.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 40 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  PRO*     4.5    10.7    -      -       +      +
     36B  ASP*     3.1    23.0    +      -       -      +
     37B  ARG*     3.3    15.2    +      -       -      +
     39B  SER*     1.3    78.3    +      -       -      +
     41B  PHE*     1.3    62.2    +      -       -      +
     43B  ILE*     3.2    11.0    +      -       -      +
     44B  ARG*     3.0    29.3    +      -       +      +
    101B  LYS*     2.2    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 41 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  TRP*     3.7    21.5    -      +       -      -
     28B  PHE*     3.6    28.7    -      +       -      -
     29B  PRO*     3.9    14.3    -      -       +      +
     32B  VAL*     3.7    24.2    -      -       +      -
     37B  ARG      2.8    19.6    +      -       -      +
     38B  SER      3.7     3.8    -      -       -      +
     39B  SER      3.3     0.2    -      -       -      -
     40B  ASN*     1.3    72.5    -      -       -      +
     42B  MET*     1.3    57.9    +      -       -      +
     44B  ARG*     3.2     3.3    +      -       -      +
     45B  ALA*     2.7    33.1    +      -       +      +
    167B  VAL*     3.5    28.3    -      -       +      -
    171B  MET*     3.7    24.0    -      -       +      -
    235B  LEU*     3.9    28.5    -      -       +      -
    237B  PRO*     4.2    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 42 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  SER      3.3    13.9    +      -       -      +
     39B  SER      3.2     8.9    +      -       -      +
     41B  PHE*     1.3    89.8    -      -       -      +
     43B  ILE*     1.3    59.2    +      -       -      +
     45B  ALA*     3.5     3.3    -      -       -      +
     46B  ILE*     2.8    37.5    +      -       +      +
    100B  THR*     4.2    12.8    -      -       -      +
    127B  MET*     6.0     0.9    -      -       -      +
    129B  PHE*     4.3    15.9    -      -       +      -
    235B  LEU*     4.3    11.7    -      -       +      +
    237B  PRO*     3.6    16.2    -      -       +      -
    240B  HIS*     3.6    27.8    -      -       +      -
    241B  ALA      3.6    31.9    -      -       -      +
    242B  ALA*     3.6    19.3    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     39B  SER      3.0    16.0    +      -       -      +
     40B  ASN*     3.5    21.5    -      -       -      +
     42B  MET*     1.3    77.3    -      -       -      +
     44B  ARG*     1.3    67.3    +      -       -      +
     46B  ILE*     3.5     3.3    +      -       -      +
     47B  TYR*     3.3    21.2    +      -       +      +
     93B  LEU      5.2     2.1    -      -       -      +
     94B  ARG*     3.9    32.7    -      -       -      +
     97B  GLY*     3.3    40.4    -      -       -      +
     98B  ASP*     3.7    18.4    -      -       -      +
    100B  THR*     4.3     0.2    -      -       -      +
    101B  LYS*     4.4    15.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 44 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  LYS      5.3     0.8    +      -       -      -
     27B  LEU*     3.0    39.9    +      -       -      +
     28B  PHE*     3.7    19.3    -      -       +      -
     29B  PRO*     4.1    12.6    -      -       +      -
     40B  ASN*     3.0    15.7    +      -       +      +
     41B  PHE      3.6     6.5    -      -       -      +
     43B  ILE*     1.3    82.6    -      -       -      +
     45B  ALA*     1.3    57.4    +      -       -      +
     47B  TYR*     3.4    41.3    +      -       -      +
     48B  VAL*     3.0    35.8    +      -       -      +
     81B  PHE*     6.0     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 45 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  PHE*     3.9     8.5    -      -       -      -
     41B  PHE*     2.7    23.6    +      -       +      +
     42B  MET*     3.2     9.8    +      -       -      +
     44B  ARG*     1.3    70.9    -      -       -      +
     46B  ILE*     1.3    61.0    +      -       -      +
     49B  VAL*     2.8    38.8    +      -       +      +
    127B  MET*     5.0     2.9    -      -       -      -
    171B  MET*     3.6    24.2    -      -       +      -
    235B  LEU*     3.7    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 46 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  MET      2.8    22.1    +      -       -      +
     43B  ILE      3.7     4.3    -      -       -      +
     45B  ALA*     1.3    73.9    -      -       -      +
     47B  TYR*     1.3    63.5    +      -       -      +
     50B  PHE*     3.2    44.6    +      -       +      +
     93B  LEU*     3.9    30.1    -      -       +      +
     96B  ALA      4.5     2.0    -      -       -      -
     97B  GLY*     3.7    28.0    -      -       -      +
    100B  THR*     4.1     8.5    -      -       +      -
    105B  LEU*     4.6     3.1    -      -       +      -
    108B  ILE*     4.5     9.9    -      -       +      -
    127B  MET*     4.0    11.2    -      -       -      -
    129B  PHE*     3.7    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  LEU*     5.3     1.6    -      -       +      -
     43B  ILE*     3.3    11.2    +      -       +      +
     44B  ARG*     3.6    43.1    -      -       -      +
     45B  ALA      3.2     0.6    -      -       -      -
     46B  ILE*     1.3    80.2    -      -       -      +
     48B  VAL*     1.3    67.4    +      -       +      +
     51B  SER*     2.9    40.3    +      -       -      -
     78B  THR*     3.4    31.0    +      -       +      -
     79B  LEU*     2.5    28.8    +      -       +      -
     81B  PHE*     3.4    27.8    -      +       -      -
     90B  ALA*     4.0    22.9    -      -       +      -
     93B  LEU*     4.2    19.6    -      -       +      +
     94B  ARG*     6.1     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  LEU*     4.4    12.6    -      -       +      +
     28B  PHE*     3.6    32.1    -      -       +      -
     44B  ARG*     3.0    24.4    +      -       -      +
     45B  ALA      4.1     1.3    -      -       -      +
     47B  TYR*     1.3    86.8    -      -       +      +
     49B  VAL*     1.3    66.8    +      -       +      +
     51B  SER*     3.6     2.3    +      -       -      -
     52B  ALA*     3.2    21.5    +      -       -      +
     70B  ILE*     4.7     2.0    -      -       +      -
     76B  CYS*     4.2    23.9    -      -       +      +
     77B  MET      5.0     0.5    -      -       -      +
     78B  THR*     4.3    13.3    -      -       +      +
    171B  MET*     4.9     1.1    -      -       -      -
    175B  VAL*     4.4    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  ALA*     2.8    27.4    +      -       +      +
     48B  VAL*     1.3    73.9    -      -       -      +
     50B  PHE*     1.3    58.9    +      -       +      +
     52B  ALA*     3.1     9.4    +      -       -      +
     53B  VAL*     3.0    28.2    +      -       +      +
    127B  MET*     4.0    19.7    -      -       +      -
    171B  MET*     4.2    19.5    -      -       +      -
    174B  ILE*     3.9    28.5    -      -       +      -
    175B  VAL*     5.0     4.7    -      -       +      -
    178B  VAL*     4.7     4.5    -      -       +      -
    235B  LEU*     5.2     2.2    -      -       +      -
    244B  MET*     3.7    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 50 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  ILE*     3.2    33.7    +      -       +      +
     49B  VAL*     1.3    76.9    -      -       +      +
     51B  SER*     1.3    60.6    +      -       -      +
     53B  VAL*     3.7     9.1    -      -       +      +
     54B  LEU*     2.9    35.7    +      -       -      +
     93B  LEU*     4.1    17.7    -      -       +      -
    108B  ILE*     3.6    40.4    -      -       +      -
    110B  LEU*     3.7    23.1    -      -       +      -
    125B  PHE*     3.5    26.2    -      -       +      -
    127B  MET*     3.6    32.3    -      -       +      -
    197B  PHE*     3.7    20.0    -      +       +      -
    244B  MET*     4.5     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  TYR*     2.9    26.3    +      -       -      -
     48B  VAL*     3.7     5.2    -      -       -      -
     50B  PHE*     1.3    76.0    -      -       -      +
     52B  ALA*     1.3    63.9    +      -       -      +
     54B  LEU*     3.1     6.2    +      -       -      -
     55B  ARG*     3.0    20.3    +      -       -      +
     65B  PHE*     3.3    15.0    -      -       -      -
     77B  MET      3.3    18.2    -      -       -      -
     78B  THR*     3.7     8.7    -      -       -      -
     79B  LEU*     3.1    32.5    +      -       -      +
     93B  LEU*     4.8     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  VAL      3.2     9.2    +      -       -      +
     49B  VAL*     3.1    12.8    +      -       -      +
     51B  SER*     1.3    77.4    -      -       -      +
     53B  VAL*     1.3    53.4    +      -       -      +
     55B  ARG*     3.3     2.5    +      -       -      -
     56B  GLN*     2.8    47.9    +      -       -      +
     76B  CYS*     5.1     8.3    -      -       +      -
     77B  MET      3.7     9.3    +      -       -      +
    175B  VAL*     4.8    18.4    -      -       +      -
    178B  VAL*     4.2    15.3    -      -       +      -
    179B  GLN*     5.4     3.1    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     49B  VAL      3.0    16.1    +      -       -      +
     50B  PHE*     3.7    10.3    -      -       +      +
     52B  ALA*     1.3    75.8    -      -       -      +
     54B  LEU*     1.3    62.1    +      -       -      +
     56B  GLN*     4.6     1.3    -      -       -      -
     57B  ARG*     3.0    27.5    +      -       +      +
     59B  ILE*     4.5     0.2    -      -       -      +
    110B  LEU*     3.7    17.5    -      -       +      -
    125B  PHE*     3.5    44.2    -      -       +      -
    178B  VAL*     3.8    21.8    -      -       +      -
    182B  CYS*     4.9     1.3    -      -       -      -
    244B  MET*     4.1    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  PHE      2.9    22.9    +      -       -      +
     51B  SER*     3.4     4.5    -      -       -      +
     53B  VAL*     1.3    77.8    -      -       -      +
     55B  ARG*     1.3    57.9    +      -       -      +
     58B  ASN      3.4     0.2    +      -       -      -
     59B  ILE*     2.9    59.2    +      -       +      -
     60B  LEU*     3.4    13.6    +      -       +      -
     65B  PHE*     3.7    12.6    -      -       +      -
     79B  LEU*     4.2    15.9    -      -       +      -
     89B  ILE*     4.0    26.9    -      -       +      -
     93B  LEU*     5.4     0.7    -      -       +      -
    110B  LEU*     4.0    24.2    -      -       +      -
    197B  PHE*     4.2    10.8    -      -       +      -
    496D  ILE*     4.2    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  SER      3.0    15.0    +      -       -      +
     52B  ALA      3.9     2.7    -      -       -      +
     54B  LEU*     1.3    77.6    -      -       -      +
     56B  GLN*     1.3    65.9    +      -       -      +
     58B  ASN*     3.1    35.8    +      -       -      +
     60B  LEU      2.8    25.7    +      -       -      -
     62B  LYS*     3.7    32.6    -      -       -      +
     65B  PHE*     3.5    36.8    -      -       +      -
     77B  MET*     3.8    30.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52B  ALA*     2.8    27.6    +      -       -      +
     55B  ARG*     1.3    80.4    -      -       -      +
     57B  ARG*     1.3    60.3    +      -       -      +
     58B  ASN*     3.1     6.4    +      -       -      +
     77B  MET*     5.4     5.9    +      -       -      +
    178B  VAL*     4.7     1.3    -      -       +      +
    179B  GLN*     3.9    43.9    +      -       +      +
    182B  CYS*     3.6    44.3    -      -       +      +
    183B  THR*     5.0    10.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  VAL*     3.0    20.4    +      -       +      +
     56B  GLN*     1.3    75.3    +      -       -      +
     58B  ASN*     1.3    71.1    +      -       -      +
     59B  ILE*     3.1    18.2    +      -       +      -
    123B  GLU*     2.8    42.8    +      -       -      +
    125B  PHE*     4.0    10.1    -      -       +      -
    182B  CYS*     3.4    46.9    +      -       -      -
    186B  LEU*     3.5    16.2    +      -       -      +
    187B  GLU      2.7    31.9    +      -       -      -
    188B  PRO*     4.2     6.5    -      -       -      +
    189B  LEU*     3.7    38.1    +      -       +      +
    250B  SER*     3.7     7.3    +      -       -      -
----------------------------------------------------------
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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