Contacts of the helix formed by residues 1 - 27 (chain A) in PDB entry 5JXL


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 MET 1 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  ARG*     1.3    68.9    +      -       -      +
      3A  SER*     3.4    11.4    +      -       -      +
      4A  LEU*     3.3    25.9    +      -       -      +
      5A  TRP*     3.2    39.2    -      -       +      +
    839A  SER*     5.4     4.8    +      -       -      +
    843A  LEU*     4.8    34.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 2 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     1.3    77.0    -      -       -      +
      3A  SER*     1.3    66.6    +      -       -      +
      5A  TRP*     3.0    24.9    +      -       -      +
      6A  SER*     3.1    12.7    +      -       -      -
     46A  GLN*     3.2    26.8    +      -       -      +
     66A  ILE*     4.4    21.4    -      -       +      +
     68A  LEU*     3.8    35.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 3 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET      4.4     5.7    +      -       -      -
      2A  ARG*     1.3    79.9    -      -       -      +
      4A  LEU*     1.3    57.1    +      -       -      +
      6A  SER*     3.0    11.7    +      -       -      -
      7A  GLY*     2.9    25.6    +      -       -      -
    835A  THR*     3.8    14.0    -      -       -      +
    839A  SER*     2.8    27.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 4 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     3.3    22.3    +      -       -      +
      2A  ARG      3.1     0.4    -      -       -      -
      3A  SER*     1.3    82.8    +      -       -      +
      5A  TRP*     1.3    79.1    +      -       +      +
      7A  GLY*     3.3     1.1    +      -       -      -
      8A  VAL*     2.9    32.0    +      -       +      +
    836A  ILE*     4.4    18.1    -      -       +      +
    839A  SER*     4.1    17.7    -      -       -      -
    840A  ASP*     3.3    26.9    -      -       -      +
    843A  LEU*     4.4    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 5 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     3.2    44.1    +      -       +      +
      2A  ARG*     3.0    15.2    +      -       -      +
      4A  LEU*     1.3    87.1    -      -       +      +
      6A  SER*     1.3    66.4    +      -       -      +
      8A  VAL*     3.1    21.6    -      -       +      +
      9A  SER*     3.0    22.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 6 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  ARG*     3.1    10.5    +      -       -      -
      3A  SER*     3.0    23.4    +      -       -      -
      5A  TRP*     1.3    77.5    -      -       -      +
      7A  GLY*     1.3    56.8    +      -       -      +
      9A  SER*     3.1     9.3    -      -       -      -
     10A  GLY*     3.0    24.3    +      -       -      -
     68A  LEU*     4.5     7.2    -      -       -      -
     69A  GLY*     3.7    28.9    -      -       -      -
     70A  VAL      5.1     0.2    +      -       -      -
    835A  THR*     5.3     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 7 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  SER      2.9    18.6    +      -       -      -
      4A  LEU      3.7     0.9    -      -       -      -
      5A  TRP      3.1     0.4    -      -       -      -
      6A  SER*     1.3    76.0    +      -       -      +
      8A  VAL*     1.3    64.7    +      -       -      +
     10A  GLY      3.5     1.0    +      -       -      -
     11A  LEU*     3.3    19.4    +      -       -      +
    832A  ASN*     3.7    14.3    -      -       -      +
    835A  THR*     4.3    14.1    -      -       -      -
    836A  ILE*     3.9    15.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 8 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  LEU*     2.9    20.6    +      -       +      +
      5A  TRP*     3.1    37.0    -      -       +      +
      7A  GLY*     1.3    74.1    -      -       -      +
      9A  SER*     1.3    66.7    +      -       -      +
     11A  LEU*     3.1    10.3    +      -       +      +
     12A  GLN*     3.0    27.3    +      -       +      +
    836A  ILE*     3.7    18.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 9 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  TRP      3.0    14.3    +      -       -      -
      6A  SER*     3.1    14.4    -      -       -      -
      7A  GLY      3.1     0.2    -      -       -      -
      8A  VAL*     1.3    79.8    -      -       -      +
     10A  GLY*     1.3    63.8    +      -       -      +
     11A  LEU      3.1     0.2    +      -       -      -
     12A  GLN*     3.3    17.3    +      -       -      +
     13A  ALA*     3.0    21.3    +      -       -      +
     43A  MET*     5.1     2.3    -      -       -      +
     69A  GLY*     4.2     3.0    -      -       -      -
     70A  VAL      2.5    38.6    +      -       -      +
     71A  SER*     5.2     0.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 10 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  SER      3.0    10.1    +      -       -      -
      7A  GLY      3.5     1.3    +      -       -      -
      8A  VAL      3.4     0.2    -      -       -      -
      9A  SER*     1.3    80.4    -      -       -      +
     11A  LEU*     1.3    55.2    +      -       -      +
     13A  ALA*     3.4     6.3    -      -       -      +
     14A  HIS*     2.5    41.1    +      -       -      -
     70A  VAL*     4.8    11.6    -      -       -      +
    832A  ASN*     3.2    20.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 11 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  GLY      3.3    12.6    +      -       -      +
      8A  VAL*     3.2    16.6    -      -       +      +
      9A  SER      3.0     0.4    -      -       -      -
     10A  GLY*     1.3    80.5    -      -       -      +
     12A  GLN*     1.3    63.8    +      -       -      +
     14A  HIS*     3.3     4.2    +      -       -      +
     15A  GLN*     3.0    19.8    +      -       -      +
    829A  TYR*     3.3    63.3    -      -       +      +
    832A  ASN*     3.6     4.9    -      -       +      +
    833A  SER*     4.4    13.2    -      -       -      +
    836A  ILE*     3.7    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 12 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  VAL*     3.0    18.7    +      -       +      +
      9A  SER*     3.3    18.7    +      -       -      +
     11A  LEU*     1.3    77.0    -      -       -      +
     13A  ALA*     1.3    66.2    +      -       +      +
     15A  GLN*     3.1    11.1    +      -       +      +
     16A  VAL*     3.0    30.1    +      -       +      +
     70A  VAL      5.8     0.6    +      -       -      -
     71A  SER*     6.1     2.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 13 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  SER      3.0    13.7    +      -       -      +
     10A  GLY*     3.4    13.0    -      -       -      +
     11A  LEU      3.2     0.2    -      -       -      -
     12A  GLN*     1.3    79.2    -      -       +      +
     14A  HIS*     1.3    65.1    +      -       +      +
     16A  VAL*     3.0    15.3    +      -       -      +
     17A  ALA      3.0     9.9    +      -       -      -
     40A  PHE*     3.7    26.9    -      -       +      -
     70A  VAL*     4.4    15.9    -      -       +      +
     71A  SER*     4.8     4.7    -      -       -      -
     72A  VAL*     4.5    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 14 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  GLY*     2.5    35.1    +      -       -      +
     11A  LEU      3.8     3.6    -      -       -      +
     13A  ALA*     1.3    76.5    -      -       +      +
     15A  GLN*     1.3    62.4    +      -       -      +
     17A  ALA*     3.7     5.3    -      -       -      +
     18A  MET*     2.9    19.1    +      -       -      +
     40A  PHE*     4.5    20.8    -      +       -      -
     70A  VAL*     6.3     2.0    -      -       +      -
    824A  ILE*     5.2     1.6    -      -       +      -
    825A  ILE*     3.4    43.1    -      -       +      +
    828A  GLY*     4.1    12.6    -      -       -      -
    829A  TYR*     4.2    23.3    -      -       +      -
    832A  ASN*     3.3    24.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 15 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  LEU      3.0    14.0    +      -       -      +
     12A  GLN*     3.2    16.4    -      -       +      +
     13A  ALA      3.1     0.2    -      -       -      -
     14A  HIS*     1.3    77.4    -      -       -      +
     16A  VAL*     1.3    64.4    +      -       +      +
     18A  MET*     3.0    21.9    +      -       -      +
     19A  ASP*     3.0    34.0    +      -       -      +
    829A  TYR*     4.5    22.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 16 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  GLN*     3.0    24.0    +      -       +      +
     13A  ALA*     3.0     7.2    +      -       -      +
     15A  GLN*     1.3    77.0    -      -       +      +
     17A  ALA*     1.3    62.6    +      -       -      +
     19A  ASP*     3.3    19.0    +      -       +      +
     20A  VAL*     3.5    21.0    +      -       +      +
     38A  ALA*     5.4     2.9    -      -       +      -
     72A  VAL*     4.1    27.4    -      -       +      -
     75A  THR*     6.0     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 17 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13A  ALA      3.0     5.5    +      -       -      -
     14A  HIS*     3.7     7.2    -      -       -      +
     15A  GLN      3.2     0.2    -      -       -      -
     16A  VAL*     1.3    77.2    -      -       -      +
     18A  MET*     1.3    64.7    +      -       -      +
     20A  VAL*     3.3     3.9    +      -       -      +
     21A  GLU*     3.0    23.1    +      -       -      +
     38A  ALA*     4.0    20.3    -      -       +      +
     40A  PHE*     3.9    24.4    -      -       +      -
    825A  ILE*     3.7    23.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 18 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  HIS      2.9    13.7    +      -       -      +
     15A  GLN*     3.0    20.6    +      -       -      +
     17A  ALA*     1.3    78.6    -      -       -      +
     19A  ASP*     1.3    58.4    -      -       -      +
     21A  GLU*     3.4     3.7    +      -       -      +
     22A  GLY*     2.9    27.3    +      -       -      -
    822A  LEU*     3.7    37.2    -      -       +      +
    825A  ILE*     3.6    29.6    -      -       +      +
    826A  GLN*     4.6     9.2    -      -       +      +
    829A  TYR*     6.6     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 19 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  GLN*     3.0    36.3    +      -       -      +
     16A  VAL*     3.7    12.7    -      -       +      +
     17A  ALA      3.2     0.4    -      -       -      -
     18A  MET*     1.3    78.9    -      -       -      +
     20A  VAL*     1.3    64.6    +      -       +      +
     22A  GLY*     3.1     2.7    +      -       -      -
     23A  ASN*     3.0    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 20 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16A  VAL*     3.6    17.9    -      -       +      +
     17A  ALA*     3.3     7.3    +      -       -      +
     19A  ASP*     1.3    77.4    -      -       +      +
     21A  GLU*     1.3    63.2    +      -       -      +
     23A  ASN*     3.1     9.8    +      -       +      +
     24A  ASN*     3.0    23.4    +      -       -      +
     36A  SER*     4.0    37.5    -      -       -      +
     37A  ARG*     4.4     7.4    -      -       -      +
     38A  ALA*     4.7     9.0    -      -       +      +
     75A  THR*     4.5    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 21 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  ALA      3.0    16.8    +      -       -      +
     18A  MET*     3.8     8.1    -      -       -      +
     20A  VAL*     1.3    79.7    -      -       -      +
     22A  GLY*     1.3    61.0    +      -       -      +
     24A  ASN*     3.3    14.7    +      -       -      +
     25A  ILE*     3.0    27.8    +      -       +      +
     36A  SER      5.4     0.2    -      -       -      +
    818A  SER*     2.8    46.4    -      -       -      +
    821A  GLU*     2.8    32.2    -      -       +      +
    822A  LEU*     3.8    24.5    -      -       +      +
    825A  ILE*     5.5     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 22 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  MET*     2.9    17.6    +      -       -      -
     19A  ASP*     3.1     5.1    +      -       -      -
     21A  GLU*     1.3    76.9    -      -       -      +
     23A  ASN*     1.3    57.3    +      -       -      +
     25A  ILE*     3.6     5.6    +      -       -      +
     26A  SER*     2.9    30.1    +      -       -      -
    822A  LEU*     5.6     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 23 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  ASP      3.0    13.4    +      -       -      +
     20A  VAL*     3.4    11.6    -      -       +      +
     22A  GLY*     1.3    74.8    -      -       -      +
     24A  ASN*     1.3    62.5    +      -       -      +
     26A  SER*     2.9    17.2    +      -       -      -
     27A  ASN*     2.7    38.1    +      -       -      +
     33A  PHE*     4.6    15.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 24 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  VAL*     3.0    18.9    +      -       -      +
     21A  GLU*     3.3    23.6    +      -       -      +
     23A  ASN*     1.3    81.5    +      -       -      +
     25A  ILE*     1.3    64.6    +      -       +      +
     27A  ASN*     3.5    12.7    +      -       -      +
     28A  VAL*     3.8    10.7    +      -       -      +
     33A  PHE*     3.4    12.5    -      -       -      -
     35A  TYR*     3.3    30.2    -      -       +      +
     36A  SER*     2.7    37.3    +      -       -      +
    813A  VAL*     4.1    14.9    -      -       +      +
    818A  SER*     5.7     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 25 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  GLU*     3.0    29.1    +      -       +      +
     22A  GLY*     4.1     4.5    -      -       -      +
     24A  ASN*     1.3    74.3    -      -       -      +
     26A  SER*     1.3    65.4    +      -       -      +
     27A  ASN      3.2     0.5    +      -       -      -
     28A  VAL*     3.4    20.3    +      -       +      +
    813A  VAL*     5.5     0.7    -      -       -      -
    815A  LEU*     4.8    11.2    -      -       +      -
    818A  SER*     3.6    29.6    -      -       -      +
    819A  LEU*     4.3     7.6    -      -       +      -
    822A  LEU*     3.5    34.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 26 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  GLY      2.9    19.7    +      -       -      -
     23A  ASN*     2.9    14.6    +      -       -      -
     25A  ILE*     1.3    79.1    -      -       -      +
     27A  ASN*     1.3    60.1    +      -       -      +
     28A  VAL      3.8     2.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 27 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  ASN*     2.7    35.4    +      -       -      +
     24A  ASN      3.5     4.4    -      -       -      +
     25A  ILE      3.2     0.2    -      -       -      -
     26A  SER*     1.3    79.6    -      -       -      +
     28A  VAL*     1.3    62.6    +      -       -      +
     29A  ASN      4.0     0.3    +      -       -      -
     30A  THR*     3.1    28.5    -      -       +      +
     33A  PHE*     3.2    52.0    -      -       -      +
    811A  SER*     4.6     0.3    +      -       -      -
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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