Contacts of the helix formed by residues 34 - 57 (chain A) 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 A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31A  ILE*     4.0     5.0    -      -       -      +
     33A  SER*     1.3    81.0    +      -       -      +
     35A  PRO*     1.3    65.5    -      -       +      +
     36A  ASP*     3.5     9.9    +      -       -      +
     37A  ARG*     2.6    69.0    +      -       -      +
     38A  SER*     2.8    32.7    +      -       -      -
    239A  HIS*     3.5     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 35 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  ASP*     1.3    88.4    -      -       +      +
     36A  ASP*     1.3    66.9    +      -       -      +
     38A  SER*     3.6     0.4    +      -       -      -
     39A  SER*     3.2    23.6    +      -       -      -
    239A  HIS*     3.3    39.7    -      -       +      +
    240A  HIS*     3.6     7.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 36 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  ASP*     3.4     8.5    +      -       -      +
     35A  PRO*     1.3    83.1    -      -       -      +
     37A  ARG*     1.3    59.9    +      -       +      +
     39A  SER*     3.2     7.5    +      -       -      -
     40A  ASN*     2.8    38.8    +      -       -      +
    101A  LYS*     4.7    11.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 37 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  PRO*     3.9    15.3    -      -       +      +
     31A  ILE*     3.2    58.6    -      -       -      +
     32A  VAL*     4.1     4.2    -      -       -      -
     34A  ASP*     2.6    42.1    +      -       -      +
     36A  ASP*     1.3    76.4    -      -       +      +
     38A  SER*     1.3    60.3    +      -       -      +
     39A  SER      3.2     0.7    -      -       -      -
     40A  ASN*     3.8    15.8    -      -       -      +
     41A  PHE*     3.0    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 38 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  VAL*     3.4    20.1    +      -       -      +
     34A  ASP      2.8    20.2    +      -       -      -
     35A  PRO      3.7     3.4    -      -       -      -
     37A  ARG*     1.3    76.5    -      -       -      +
     39A  SER*     1.3    60.3    +      -       -      +
     41A  PHE*     3.5     5.0    +      -       -      +
     42A  MET*     3.4    23.4    +      -       -      +
    237A  PRO*     3.5    12.8    -      -       -      +
    238A  GLY      3.8     0.4    -      -       -      -
    239A  HIS*     2.9    22.2    +      -       -      -
    240A  HIS*     2.7    29.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 39 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35A  PRO      3.2    17.1    +      -       -      -
     36A  ASP*     3.4     6.5    -      -       -      -
     37A  ARG      3.2     0.2    -      -       -      -
     38A  SER*     1.3    75.5    +      -       -      +
     40A  ASN*     1.3    64.5    +      -       -      +
     41A  PHE      3.1     1.3    -      -       -      -
     42A  MET*     3.2    12.2    +      -       -      +
     43A  ILE*     3.2    21.0    +      -       -      +
    100A  THR*     3.1    17.6    +      -       -      -
    101A  LYS*     3.0    37.4    +      -       -      +
    240A  HIS*     3.7    14.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 40 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  PRO*     4.4     9.6    -      -       +      -
     36A  ASP*     2.8    28.9    +      -       -      +
     37A  ARG*     3.8    17.9    -      -       +      +
     38A  SER      3.5     0.2    -      -       -      -
     39A  SER*     1.3    75.6    -      -       -      +
     41A  PHE*     1.3    62.9    +      -       -      +
     43A  ILE*     3.5    10.0    +      -       -      +
     44A  ARG*     3.2    28.4    +      -       +      +
    101A  LYS*     3.0    31.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 41 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24A  TRP*     3.7    19.3    -      +       -      -
     28A  PHE*     3.6    27.1    -      +       -      -
     29A  PRO*     3.9    13.0    -      -       +      +
     32A  VAL*     3.8    23.6    -      -       +      -
     37A  ARG      3.0    17.9    +      -       -      +
     38A  SER*     3.6     6.1    -      -       -      +
     39A  SER      3.1     0.4    -      -       -      -
     40A  ASN*     1.3    78.7    -      -       -      +
     42A  MET*     1.3    67.7    +      -       -      +
     44A  ARG*     3.2     2.9    +      -       -      +
     45A  ALA*     2.8    24.5    +      -       +      -
    167A  VAL*     3.4    24.5    -      -       +      -
    171A  MET*     3.5    24.2    -      -       +      -
    235A  LEU*     4.0    28.5    -      -       +      -
    237A  PRO*     4.1    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 42 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  SER      3.4    13.4    +      -       -      +
     39A  SER*     3.2     8.6    +      -       -      +
     41A  PHE*     1.3    83.8    -      -       -      +
     43A  ILE*     1.3    56.9    +      -       -      +
     45A  ALA*     3.5     4.0    -      -       -      +
     46A  ILE*     2.9    37.3    +      -       -      +
    100A  THR*     4.3    12.3    -      -       +      +
    127A  MET*     6.2     0.2    -      -       -      +
    129A  PHE*     4.3    18.3    -      -       +      -
    235A  LEU*     4.2    11.4    -      -       +      +
    237A  PRO*     3.6    21.8    -      -       +      -
    240A  HIS*     3.5    28.9    -      -       +      -
    241A  ALA      3.5    35.0    -      -       -      +
    242A  ALA*     3.6    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 43 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  SER      3.2    13.0    +      -       -      +
     40A  ASN*     3.6    12.1    -      -       -      +
     42A  MET*     1.3    77.6    -      -       -      +
     44A  ARG*     1.3    70.7    +      -       +      +
     46A  ILE*     3.5     3.7    +      -       -      +
     47A  TYR*     3.2    21.9    +      -       +      +
     93A  LEU      5.1     1.9    -      -       -      +
     94A  ARG*     3.6    35.0    -      -       -      +
     97A  GLY*     3.2    37.2    -      -       -      +
     98A  ASP*     3.4    23.1    -      -       -      +
    101A  LYS*     3.7    27.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 44 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  LYS      5.0     1.4    +      -       -      -
     27A  LEU*     3.0    53.3    +      -       -      +
     28A  PHE*     3.7    12.3    -      -       +      -
     29A  PRO*     4.2    12.6    -      -       +      -
     40A  ASN*     3.2    16.4    -      -       +      +
     41A  PHE      3.2     6.8    +      -       -      +
     43A  ILE*     1.3    83.1    +      -       -      +
     45A  ALA*     1.3    58.2    +      -       -      +
     47A  TYR*     3.3    40.1    +      -       -      +
     48A  VAL*     3.0    34.6    +      -       +      +
     81A  PHE*     5.9     4.9    -      -       -      -
     94A  ARG*     6.3     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 45 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  PHE*     4.0     2.4    -      -       -      -
     41A  PHE*     2.8    19.0    +      -       +      +
     42A  MET*     3.2    10.3    +      -       -      +
     44A  ARG*     1.3    74.7    -      -       -      +
     46A  ILE*     1.3    66.3    +      -       +      +
     48A  VAL*     4.7     0.7    -      -       -      -
     49A  VAL*     2.9    32.6    +      -       +      +
    127A  MET*     4.9     4.0    -      -       -      -
    171A  MET*     3.6    30.1    -      -       +      -
    235A  LEU*     3.6    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 46 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42A  MET      2.9    22.2    +      -       -      +
     43A  ILE      3.7     4.3    -      -       -      +
     45A  ALA*     1.3    75.8    -      -       -      +
     47A  TYR*     1.3    63.7    +      -       -      +
     50A  PHE*     3.1    48.9    +      -       +      +
     93A  LEU*     4.1    25.8    -      -       +      +
     96A  ALA      4.4     3.1    -      -       -      -
     97A  GLY*     3.7    31.6    -      -       -      +
    100A  THR*     4.7     1.8    -      -       +      -
    105A  LEU*     4.6     1.8    -      -       +      -
    108A  ILE*     4.5    12.6    -      -       +      -
    127A  MET*     4.0    20.9    -      -       -      -
    129A  PHE*     3.8    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 47 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  LEU*     4.8     3.6    -      -       +      -
     43A  ILE*     3.2    11.2    +      -       +      +
     44A  ARG*     3.5    38.8    -      -       -      +
     45A  ALA      3.2     0.2    -      -       -      -
     46A  ILE*     1.3    79.9    -      -       -      +
     48A  VAL*     1.3    67.2    +      -       +      +
     51A  SER*     2.6    42.2    +      -       -      -
     78A  THR*     3.4    31.9    +      -       +      -
     79A  LEU*     2.6    30.6    +      -       +      -
     81A  PHE*     3.5    31.6    -      +       -      -
     90A  ALA*     4.0    21.5    -      -       +      -
     93A  LEU*     4.2    19.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 48 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  LEU*     4.6    11.9    -      -       +      -
     28A  PHE*     3.6    31.0    -      -       +      -
     44A  ARG*     3.0    22.9    +      -       +      +
     45A  ALA*     4.0     2.5    -      -       -      +
     47A  TYR*     1.3    89.8    -      -       +      +
     49A  VAL*     1.3    65.8    +      -       +      +
     51A  SER*     3.4     5.4    +      -       -      -
     52A  ALA*     3.0    21.7    +      -       +      +
     70A  ILE*     4.6     2.2    -      -       +      -
     76A  CYS*     4.2    24.3    -      -       +      -
     77A  MET      4.9     0.7    -      -       -      +
     78A  THR*     4.5    10.2    -      -       +      +
    171A  MET*     4.8     1.6    -      -       -      -
    175A  VAL*     4.4    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 49 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  ALA*     2.9    23.3    +      -       +      +
     48A  VAL*     1.3    75.9    -      -       -      +
     50A  PHE*     1.3    58.3    +      -       -      +
     52A  ALA*     3.1     8.0    +      -       -      +
     53A  VAL*     2.9    26.7    +      -       +      +
    127A  MET*     4.1    11.7    -      -       +      -
    171A  MET*     4.4    17.5    -      -       +      -
    174A  ILE*     3.7    35.2    -      -       +      -
    175A  VAL*     4.9     4.5    -      -       +      -
    178A  VAL*     4.3     9.9    -      -       +      -
    235A  LEU*     5.5     0.9    -      -       +      -
    244A  MET*     3.7    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 50 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  ILE*     3.1    37.7    +      -       +      +
     49A  VAL*     1.3    74.6    -      -       -      +
     51A  SER*     1.3    60.1    +      -       -      +
     53A  VAL*     3.8     5.4    -      -       +      +
     54A  LEU*     3.0    35.5    +      -       -      +
     93A  LEU*     4.1    19.7    -      -       +      -
    108A  ILE*     3.5    45.8    -      -       +      -
    110A  LEU*     3.8    21.3    -      -       +      -
    125A  PHE*     3.5    21.3    -      -       +      -
    127A  MET*     3.6    28.9    -      -       +      -
    197A  PHE*     3.9    18.2    -      +       +      -
    244A  MET*     4.3    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 51 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  TYR*     2.6    28.3    +      -       -      -
     48A  VAL*     3.5     4.9    -      -       -      -
     50A  PHE*     1.3    75.6    -      -       -      +
     52A  ALA*     1.3    65.3    +      -       -      +
     54A  LEU*     3.4     1.6    +      -       -      -
     55A  ARG*     3.0    21.1    +      -       -      +
     65A  PHE*     3.3    14.5    -      -       -      -
     77A  MET      3.4    18.2    -      -       -      -
     78A  THR*     3.7     9.5    -      -       -      -
     79A  LEU*     3.2    33.8    +      -       -      +
     93A  LEU*     4.9     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 52 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  VAL*     3.0    14.1    +      -       +      +
     49A  VAL*     3.1    11.9    +      -       -      +
     51A  SER*     1.3    77.1    -      -       -      +
     53A  VAL*     1.3    57.0    +      -       -      +
     55A  ARG*     4.0     2.0    -      -       -      +
     56A  GLN*     2.8    42.9    +      -       -      +
     76A  CYS*     5.0     8.3    -      -       +      -
     77A  MET      3.8     8.9    +      -       -      +
    175A  VAL*     5.0    15.9    -      -       +      -
    178A  VAL*     4.1    17.0    -      -       +      -
    179A  GLN*     5.4     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 53 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  VAL*     2.9    25.4    +      -       +      +
     50A  PHE*     3.8     8.5    -      -       +      +
     52A  ALA*     1.3    76.2    -      -       -      +
     54A  LEU*     1.3    64.2    +      -       -      +
     56A  GLN*     4.8     1.1    -      -       -      -
     57A  ARG*     3.0    28.6    +      -       +      +
     59A  ILE*     5.2     0.7    -      -       +      -
    110A  LEU*     3.7    17.3    -      -       +      -
    125A  PHE*     3.5    54.3    -      -       +      -
    178A  VAL*     4.1    17.5    -      -       +      -
    182A  CYS*     4.9     1.1    -      -       -      -
    244A  MET*     4.2    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 54 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  PHE*     3.0    22.4    +      -       +      +
     51A  SER      3.7     4.0    -      -       -      +
     53A  VAL*     1.3    77.8    -      -       -      +
     55A  ARG*     1.3    61.0    +      -       -      +
     58A  ASN      3.4     0.2    +      -       -      -
     59A  ILE*     2.9    55.1    +      -       +      -
     60A  LEU*     3.3    16.8    +      -       +      -
     65A  PHE*     3.8    10.1    -      -       +      -
     79A  LEU*     4.1    26.9    -      -       +      -
     89A  ILE*     4.1    15.0    -      -       +      -
     93A  LEU*     5.5     0.2    -      -       +      -
    110A  LEU*     3.7    29.4    -      -       +      -
    197A  PHE*     4.3    11.0    -      -       +      -
    496C  ILE*     4.3    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 55 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51A  SER      3.0    16.6    +      -       -      +
     52A  ALA*     4.0     2.2    -      -       -      +
     54A  LEU*     1.3    75.4    -      -       -      +
     56A  GLN*     1.3    66.9    +      -       -      +
     58A  ASN*     2.8    46.8    +      -       -      +
     60A  LEU      3.0    19.4    +      -       -      -
     61A  GLU*     4.1     0.2    -      -       -      +
     62A  LYS*     3.9    30.6    -      -       -      +
     65A  PHE*     3.5    34.7    -      -       +      -
     77A  MET*     3.7    32.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 56 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  ALA*     2.8    26.6    +      -       -      +
     55A  ARG*     1.3    83.2    -      -       -      +
     57A  ARG*     1.3    58.4    +      -       -      +
     58A  ASN*     3.1     2.3    +      -       -      +
     77A  MET*     5.4     5.5    +      -       -      +
    178A  VAL*     4.8     1.6    -      -       +      -
    179A  GLN*     3.9    40.3    +      -       +      +
    182A  CYS*     3.6    39.4    -      -       +      +
    183A  THR*     3.7    18.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 57 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  VAL*     3.0    19.8    +      -       +      +
     56A  GLN*     1.3    74.6    -      -       -      +
     58A  ASN*     1.3    70.3    +      -       -      +
     59A  ILE*     3.1    20.0    +      -       +      +
    123A  GLU*     2.9    40.2    +      -       -      +
    125A  PHE*     4.2     9.2    -      -       +      -
    182A  CYS*     3.5    41.3    +      -       -      -
    186A  LEU*     3.5    20.2    +      -       -      +
    187A  GLU      2.7    33.3    +      -       -      -
    188A  PRO*     4.0     6.1    -      -       -      +
    189A  LEU*     3.4    41.9    +      -       +      +
    250A  SER*     3.4     6.5    +      -       -      -
----------------------------------------------------------
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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