Contacts of the helix formed by residues 25 - 51 (chain G) in PDB entry 2Q9Q


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 ASN 25 (chain G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8G  GLU*     3.9    23.1    +      -       -      +
      9G  LEU*     3.6    17.8    -      -       +      +
     12G  GLU*     3.2    27.5    +      -       -      +
     23G  ALA      3.1     2.8    +      -       -      +
     24G  PHE*     1.3    71.7    -      -       -      +
     26G  GLU*     1.3    61.2    +      -       -      +
     27G  ASP*     3.6     7.6    +      -       -      +
     28G  GLY*     2.8    29.1    +      -       -      +
     29G  LEU*     3.1    20.1    +      -       -      +
     79G  TYR*     2.8    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 26 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82A  GLU*     5.4     7.4    -      -       -      +
     24G  PHE*     3.1    33.6    +      -       +      +
     25G  ASN*     1.3    73.2    -      -       -      +
     27G  ASP*     1.3    64.0    +      -       -      +
     29G  LEU*     3.4     5.4    +      -       +      +
     30G  ARG*     2.9    28.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 27 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  HIS*     4.3     7.6    +      -       -      -
     81A  GLU*     2.8    38.5    +      -       -      +
      5G  LYS*     5.6     1.8    -      -       -      +
     25G  ASN*     3.3     6.2    +      -       -      +
     26G  GLU*     1.3    78.3    -      -       -      +
     28G  GLY*     1.3    57.9    +      -       -      +
     30G  ARG*     3.0    27.6    +      -       -      +
     31G  GLN*     2.9    45.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 28 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5G  LYS*     3.6    24.4    -      -       -      +
      8G  GLU*     5.7     0.2    -      -       -      -
      9G  LEU*     4.3    10.1    -      -       -      -
     25G  ASN*     2.8    26.4    +      -       -      -
     27G  ASP*     1.3    74.2    -      -       -      +
     29G  LEU*     1.3    56.8    +      -       -      +
     31G  GLN*     3.4     1.2    +      -       -      +
     32G  VAL*     3.0    36.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 29 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144F  VAL*     3.9    22.9    -      -       +      +
    145F  ALA*     4.5     4.5    -      -       +      -
      9G  LEU*     4.2    14.2    -      -       +      +
     24G  PHE*     3.7    30.7    -      -       +      -
     25G  ASN      3.1    18.1    +      -       -      +
     26G  GLU*     3.8     6.5    -      -       +      +
     28G  GLY*     1.3    75.2    -      -       -      +
     30G  ARG*     1.3    62.1    +      -       -      +
     32G  VAL*     3.9     2.8    -      -       +      +
     33G  LEU*     3.1    46.0    +      -       +      +
     76G  THR*     3.8    31.4    -      -       +      +
     79G  TYR*     5.6     3.6    -      -       +      -
     80G  LEU*     4.7     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 30 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26G  GLU*     2.9    20.2    +      -       +      +
     27G  ASP*     3.0    33.2    +      -       -      +
     29G  LEU*     1.3    76.0    -      -       -      +
     31G  GLN*     1.3    86.3    +      -       -      +
     33G  LEU*     3.3    10.2    +      -       +      +
     34G  GLU*     2.9    62.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 31 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5G  LYS*     3.4    45.6    +      -       +      +
     27G  ASP*     2.9    29.9    +      -       -      +
     28G  GLY      3.8     3.8    -      -       -      +
     30G  ARG*     1.3    92.3    -      -       -      +
     32G  VAL*     1.3    60.4    +      -       -      +
     34G  GLU*     3.2    12.7    +      -       -      +
     35G  GLU*     2.9    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 32 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5G  LYS*     4.0     9.0    -      -       +      -
      6G  ALA*     3.6    35.0    -      -       +      +
      9G  LEU*     4.3     7.9    -      -       +      -
     28G  GLY      3.0    22.5    +      -       -      +
     29G  LEU*     3.9     5.8    -      -       -      +
     30G  ARG      3.3     0.2    -      -       -      -
     31G  GLN*     1.3    74.4    -      -       -      +
     33G  LEU*     1.3    59.7    +      -       +      +
     35G  GLU*     3.1    10.9    +      -       -      +
     36G  MET*     2.9    30.2    +      -       -      +
     72G  ASN*     3.7    28.4    -      -       +      +
     76G  THR*     3.6    23.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 33 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144F  VAL      4.9     2.5    -      -       -      +
    145F  ALA*     4.3    12.8    -      -       +      +
    148F  HIS*     4.0    35.9    -      -       +      +
    149F  MET*     3.9    33.4    -      -       +      -
    150F  PRO*     5.7     0.3    -      -       -      +
     29G  LEU*     3.1    40.1    +      -       +      +
     30G  ARG*     3.6     8.5    -      -       +      +
     32G  VAL*     1.3    78.3    -      -       +      +
     34G  GLU*     1.3    61.7    +      -       +      +
     36G  MET*     3.3    12.7    +      -       -      +
     37G  LYS*     3.1    22.2    +      -       -      +
     76G  THR*     5.4     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 34 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30G  ARG*     2.9    56.1    +      -       +      +
     31G  GLN*     3.2    11.9    +      -       -      +
     33G  LEU*     1.3    77.9    -      -       +      +
     35G  GLU*     1.3    58.2    +      -       -      +
     37G  LYS*     3.5    13.6    +      -       +      +
     38G  ALA*     3.1    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 35 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1G  MET      5.3     0.7    -      -       -      +
      2G  PHE*     3.2    24.7    -      -       +      +
      3G  CYS*     2.8    30.2    +      -       -      -
      4G  GLU      5.0     0.7    +      -       -      -
      5G  LYS*     4.6    16.3    -      -       -      +
     31G  GLN      2.9    12.7    +      -       -      +
     32G  VAL*     3.5     9.4    -      -       -      +
     34G  GLU*     1.3    75.8    -      -       -      +
     36G  MET*     1.3    59.9    +      -       -      +
     37G  LYS      3.2     0.2    -      -       -      -
     38G  ALA*     3.8     6.5    -      -       +      +
     39G  LEU*     2.9    39.0    +      -       +      +
     72G  ASN*     3.5    17.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 36 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149F  MET*     3.5    42.6    -      -       +      +
    150F  PRO*     3.5    18.5    -      -       +      +
    153F  LEU*     4.5     7.9    -      -       +      -
     32G  VAL*     2.9    19.2    +      -       -      +
     33G  LEU*     3.7    20.4    -      -       +      +
     34G  GLU      3.3     0.2    -      -       -      -
     35G  GLU*     1.3    76.3    -      -       -      +
     37G  LYS*     1.3    56.1    +      -       -      +
     39G  LEU*     4.4     1.1    -      -       -      -
     40G  TYR*     2.9    27.2    +      -       -      +
     69G  LEU*     3.2    40.7    -      -       +      +
     72G  ASN*     3.5    29.8    -      -       +      +
     73G  ARG*     4.0    10.5    -      -       +      -
     76G  THR*     5.0     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 37 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150F  PRO*     4.5     6.0    -      -       +      +
     33G  LEU      3.1    14.1    +      -       -      +
     34G  GLU*     3.6    14.6    -      -       +      +
     35G  GLU      3.2     0.2    -      -       -      -
     36G  MET*     1.3    75.1    -      -       -      +
     38G  ALA*     1.3    66.7    +      -       -      +
     40G  TYR*     3.1    11.0    +      -       +      +
     41G  GLU*     2.9    54.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 38 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34G  GLU      3.1    14.6    +      -       -      +
     35G  GLU*     3.8     7.6    -      -       +      +
     37G  LYS*     1.3    79.1    -      -       -      +
     39G  LEU*     1.3    57.5    +      -       +      +
     41G  GLU*     3.3    16.5    -      -       -      +
     42G  GLN*     3.0    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 39 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2G  PHE*     3.5    38.1    -      -       +      -
     35G  GLU*     2.9    37.4    +      -       +      +
     38G  ALA*     1.3    78.0    -      -       +      +
     40G  TYR*     1.3    56.8    +      -       -      +
     42G  GLN*     3.8     5.6    -      -       -      +
     43G  ASN*     3.0    30.3    +      -       -      +
     65G  ARG*     3.6    28.5    -      -       +      +
     68G  SER*     3.9    17.0    -      -       -      -
     69G  LEU*     3.6    24.6    -      -       +      +
     72G  ASN*     3.7    25.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 40 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150F  PRO*     3.5    16.8    -      -       +      -
    151F  PRO*     3.5    36.7    -      -       +      +
    152F  ASN*     3.4    34.1    -      -       -      -
     36G  MET      2.9    18.8    +      -       -      +
     37G  LYS*     3.1     9.4    +      -       +      +
     39G  LEU*     1.3    77.9    -      -       -      +
     41G  GLU*     1.3    62.5    +      -       +      +
     43G  ASN*     3.4     4.0    +      -       +      +
     44G  GLN*     3.0    71.8    +      -       +      +
     69G  LEU*     4.2    12.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 41 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37G  LYS*     2.9    48.1    +      -       -      +
     38G  ALA*     3.3    19.1    -      -       -      +
     40G  TYR*     1.3    78.1    -      -       +      +
     42G  GLN*     1.3    63.8    +      -       -      +
     43G  ASN      3.1     0.7    -      -       -      -
     44G  GLN*     3.3    10.4    +      -       -      +
     45G  SER*     3.1    24.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 42 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2G  PHE*     4.4    14.2    -      -       -      -
     38G  ALA*     3.0    21.6    +      -       -      +
     39G  LEU*     3.8     6.7    -      -       -      +
     41G  GLU*     1.3    77.7    -      -       +      +
     43G  ASN*     1.3    60.9    +      -       -      +
     45G  SER*     3.8     6.4    +      -       -      -
     46G  ASP*     3.5    15.8    +      -       -      +
     65G  ARG*     3.3    46.6    +      -       -      +
     42H  ARG*     5.7     6.6    +      -       -      +
     43H  LEU*     5.8     0.3    -      -       -      +
     47H  PHE*     6.1     3.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 43 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39G  LEU      3.0    15.8    +      -       -      +
     40G  TYR*     3.7     7.6    -      -       +      +
     41G  GLU      3.1     0.2    -      -       -      -
     42G  GLN*     1.3    76.9    -      -       -      +
     44G  GLN*     1.3    54.0    +      -       -      +
     45G  SER      3.2     0.2    -      -       -      -
     46G  ASP*     3.0     2.9    +      -       -      +
     47G  VAL*     2.8    43.4    +      -       +      +
     62G  ILE*     3.1    44.2    +      -       -      +
     65G  ARG*     2.6    41.1    +      -       -      +
     66G  HIS*     4.0    15.2    +      -       -      +
     69G  LEU*     4.9     5.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 44 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40G  TYR*     3.0    63.5    +      -       +      +
     41G  GLU*     3.5    10.1    -      -       -      +
     43G  ASN*     1.3    75.5    -      -       -      +
     45G  SER*     1.3    62.3    +      -       -      +
     47G  VAL*     3.3    21.6    +      -       -      +
     48G  ASN*     3.3    15.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 45 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41G  GLU      3.1    16.0    +      -       -      -
     42G  GLN*     3.8     9.4    -      -       -      -
     43G  ASN      3.2     0.2    -      -       -      -
     44G  GLN*     1.3    78.0    -      -       -      +
     46G  ASP*     1.3    64.4    +      -       -      +
     48G  ASN*     4.1     4.7    +      -       -      +
     49G  GLU*     3.7    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 46 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42G  GLN*     3.5     6.9    +      -       -      +
     43G  ASN      3.0     4.9    +      -       -      +
     45G  SER*     1.3    82.0    +      -       -      +
     47G  VAL*     1.3    61.8    +      -       -      +
     48G  ASN      3.2     1.8    -      -       -      -
     49G  GLU*     3.8     3.3    -      -       -      +
     50G  ALA*     3.0    31.7    +      -       -      +
     58G  LEU*     3.8    16.4    -      -       +      +
     61G  THR*     4.3     0.9    -      -       -      +
     62G  ILE*     4.2    10.5    -      -       +      -
     65G  ARG*     2.5    37.5    +      -       -      +
     42H  ARG*     2.5    44.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 47 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43G  ASN*     2.8    31.4    +      -       +      +
     44G  GLN*     3.3    14.8    +      -       -      +
     46G  ASP*     1.3    77.6    -      -       -      +
     48G  ASN*     1.3    56.9    +      -       -      +
     50G  ALA*     4.5     0.2    -      -       -      -
     51G  LYS*     2.9    54.3    +      -       +      +
     52G  SER*     4.8     0.2    +      -       -      -
     62G  ILE*     3.9    32.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 48 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44G  GLN      3.3    12.2    +      -       -      +
     45G  SER*     4.4     5.6    +      -       -      +
     46G  ASP      3.2     0.2    -      -       -      -
     47G  VAL*     1.3    77.7    -      -       -      +
     49G  GLU*     1.3    58.5    +      -       -      +
     50G  ALA      3.1     4.7    -      -       -      -
     52G  SER*     2.9    55.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 49 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45G  SER*     3.7    17.9    +      -       -      +
     46G  ASP*     3.4     6.3    +      -       -      +
     48G  ASN*     1.3    82.2    -      -       -      +
     50G  ALA*     1.3    56.9    +      -       -      +
     52G  SER      4.6     2.2    -      -       -      -
     53G  GLY      3.0    32.2    -      -       -      +
     54G  GLY*     3.4     3.5    +      -       -      -
     58G  LEU*     3.3    15.7    -      -       +      +
     42H  ARG*     2.9    32.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 50 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46G  ASP      3.0    18.0    +      -       -      +
     47G  VAL      4.0     1.6    -      -       -      +
     49G  GLU*     1.3    76.6    -      -       -      +
     51G  LYS*     1.3    63.2    +      -       +      +
     52G  SER      2.8    10.1    +      -       -      -
     53G  GLY      3.6     0.3    +      -       -      -
     54G  GLY*     3.5    25.9    +      -       -      +
     56G  SER*     4.7    19.7    +      -       -      +
     58G  LEU*     4.1    21.5    -      -       +      -
     59G  ILE*     5.4     2.9    -      -       +      +
     62G  ILE*     4.2    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 51 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47G  VAL*     2.9    37.7    +      -       +      +
     50G  ALA*     1.3    78.5    -      -       +      +
     52G  SER*     1.3    66.1    +      -       -      +
     56G  SER*     6.0     0.4    -      -       -      -
     59G  ILE*     5.4    14.8    -      -       +      +
     62G  ILE*     5.6     7.9    -      -       +      -
----------------------------------------------------------
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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