Contacts of the helix formed by residues 646 - 674 (chain C) in PDB entry 3RCW


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 THR 646 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    642C  ASN*     3.5    13.6    -      -       +      +
    643C  ALA*     3.1    30.2    +      -       +      +
    644C  ARG      3.3     0.2    -      -       -      -
    645C  ASP*     1.3    90.5    -      -       -      +
    647C  VAL*     1.3    63.9    +      -       -      +
    648C  PHE*     3.6     6.7    +      -       -      -
    649C  TYR*     3.4    13.9    +      -       -      +
    650C  ARG*     3.3    25.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 647 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    586C  ILE*     5.1     8.3    -      -       +      -
    646C  THR*     1.3    71.2    -      -       -      +
    648C  PHE*     1.3    78.3    +      -       +      +
    650C  ARG*     3.5    23.4    +      -       -      +
    651C  ALA*     3.0    22.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 648 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MB3      3.5    33.2    -      +       -      -
    586C  ILE*     3.8    43.5    -      -       +      -
    595C  GLU*     5.8     4.0    -      -       -      -
    596C  VAL*     5.6     2.9    -      -       +      -
    638C  CYS*     3.7    13.1    -      -       -      -
    642C  ASN*     3.7    28.5    -      -       -      +
    646C  THR*     3.3     5.3    +      -       -      +
    647C  VAL*     1.3    84.6    -      -       +      +
    649C  TYR*     1.3    63.3    +      -       -      +
    651C  ALA*     2.9     7.4    +      -       -      +
    652C  ALA      2.9    19.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 649 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    638C  CYS*     4.2     8.9    -      -       -      -
    639C  MET*     3.4    51.7    -      -       +      +
    642C  ASN*     3.5    21.7    -      -       +      +
    643C  ALA      3.3    20.9    -      -       -      +
    644C  ARG*     3.5    30.8    -      -       +      +
    646C  THR*     3.4     9.9    +      -       -      +
    648C  PHE*     1.3    76.8    -      -       -      +
    650C  ARG*     1.3    60.8    +      -       +      +
    652C  ALA*     3.2     6.7    +      -       -      +
    653C  VAL*     3.0    46.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 650 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    644C  ARG      4.4    11.4    -      -       -      +
    645C  ASP*     2.7    31.4    +      -       -      +
    646C  THR      3.3    17.4    +      -       -      +
    647C  VAL*     3.8    22.6    -      -       -      +
    648C  PHE      3.2     0.6    -      -       -      -
    649C  TYR*     1.3    78.6    -      -       +      +
    651C  ALA*     1.3    64.2    +      -       -      +
    653C  VAL*     3.2     9.6    +      -       +      +
    654C  ARG*     3.1    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 651 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    586C  ILE*     4.1    24.9    -      -       +      -
    587C  PHE*     4.2    12.7    -      -       +      -
    647C  VAL*     3.0    14.4    +      -       +      +
    648C  PHE*     2.9    10.9    +      -       -      +
    650C  ARG*     1.3    75.6    -      -       -      +
    652C  ALA*     1.3    64.4    +      -       -      +
    654C  ARG*     3.3     5.9    +      -       -      +
    655C  LEU*     3.0    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 652 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    587C  PHE*     3.9    11.6    -      -       +      -
    635C  ILE*     3.5    29.6    -      -       +      +
    638C  CYS*     3.8    32.5    -      -       +      -
    639C  MET*     4.0     8.3    -      -       +      -
    648C  PHE      2.9     6.1    +      -       -      -
    649C  TYR      3.5     8.7    -      -       -      +
    651C  ALA*     1.3    75.4    -      -       -      +
    653C  VAL*     1.3    64.2    +      -       -      +
    655C  LEU*     3.3     0.4    +      -       -      -
    656C  ARG*     3.0    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 653 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639C  MET*     4.3    17.9    -      -       +      -
    649C  TYR*     3.0    43.4    +      -       +      +
    650C  ARG*     3.2    10.7    +      -       +      +
    652C  ALA*     1.3    77.9    -      -       -      +
    654C  ARG*     1.3    61.7    +      -       -      +
    656C  ARG*     3.5     9.6    +      -       -      +
    657C  ASP*     3.3    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 654 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    650C  ARG      3.1    15.1    +      -       -      +
    651C  ALA*     4.0     4.9    -      -       -      +
    653C  VAL*     1.3    76.6    -      -       -      +
    655C  LEU*     1.3    60.8    +      -       -      +
    657C  ASP*     3.3     9.2    +      -       -      +
    658C  GLN*     2.9    46.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 655 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    578C  LEU*     3.8    12.1    -      -       -      +
    581C  LYS*     3.6    40.2    -      -       +      +
    582C  ASP*     4.4     2.5    -      -       +      -
    587C  PHE*     3.4    35.0    -      -       +      -
    609C  PHE*     4.0    19.5    -      -       +      -
    631C  PHE*     3.5    17.6    -      -       +      -
    634C  ILE*     5.1     0.7    -      -       +      -
    635C  ILE*     4.1    11.0    -      -       +      -
    651C  ALA      3.0    17.3    +      -       -      +
    652C  ALA*     3.3     4.2    +      -       -      +
    654C  ARG*     1.3    73.8    -      -       -      +
    656C  ARG*     1.3    57.7    +      -       -      +
    658C  GLN*     4.4     2.9    -      -       -      +
    659C  GLY*     2.7    34.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 656 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    631C  PHE*     4.4     7.8    -      -       +      -
    632C  ASP*     4.7    13.8    +      -       -      +
    635C  ILE*     3.4    35.2    -      -       +      +
    636C  ASP*     2.7    35.6    +      -       -      -
    639C  MET*     4.2    18.7    -      -       -      +
    652C  ALA      3.0    13.1    +      -       -      +
    653C  VAL*     3.6    12.3    -      -       -      +
    654C  ARG      3.3     0.2    -      -       -      -
    655C  LEU*     1.3    76.7    -      -       -      +
    657C  ASP*     1.3    62.2    +      -       -      +
    660C  GLY*     3.0    25.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 657 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    653C  VAL*     3.3    21.6    +      -       -      +
    654C  ARG*     3.3    11.7    +      -       -      +
    655C  LEU      3.2     0.4    -      -       -      -
    656C  ARG*     1.3    82.6    -      -       -      +
    658C  GLN*     1.3    66.2    +      -       +      +
    659C  GLY      3.4     0.5    +      -       -      -
    660C  GLY*     3.4     8.0    +      -       -      -
    661C  VAL*     3.5    16.7    +      -       -      +
    664C  ARG*     4.5     3.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 658 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    581C  LYS*     3.7    47.1    +      -       +      +
    654C  ARG*     2.9    37.2    +      -       -      +
    655C  LEU*     4.4     1.7    -      -       -      +
    657C  ASP*     1.3    74.2    -      -       +      +
    659C  GLY*     1.3    62.0    +      -       -      +
    661C  VAL*     3.5    21.4    +      -       +      +
    662C  VAL*     3.7    12.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 659 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    578C  LEU*     3.8    21.0    -      -       -      +
    581C  LYS*     5.2     1.1    -      -       -      -
    631C  PHE*     4.2     7.2    -      -       -      -
    655C  LEU*     2.7    22.4    +      -       -      +
    658C  GLN*     1.3    77.2    -      -       -      +
    660C  GLY*     1.3    58.2    +      -       -      +
    662C  VAL*     2.9     7.2    +      -       -      +
    663C  LEU*     2.9    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 660 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    631C  PHE*     4.8     1.6    -      -       -      -
    656C  ARG      3.0    20.5    +      -       -      -
    657C  ASP      3.8     2.2    -      -       -      -
    658C  GLN      3.4     0.2    -      -       -      -
    659C  GLY*     1.3    75.5    -      -       -      +
    661C  VAL*     1.3    54.9    +      -       -      +
    663C  LEU*     3.9     9.5    -      -       -      +
    664C  ARG*     2.9    54.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 661 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    657C  ASP      3.5    16.5    +      -       -      +
    658C  GLN*     3.6    11.4    -      -       -      +
    659C  GLY      3.2     0.8    -      -       -      -
    660C  GLY*     1.3    75.8    -      -       -      +
    662C  VAL*     1.3    60.8    +      -       +      +
    664C  ARG*     3.5    19.7    +      -       -      +
    665C  GLN*     3.0    28.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 662 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    574C  VAL*     4.0    18.6    -      -       +      +
    577C  GLN*     3.5    33.4    -      -       +      +
    578C  LEU*     4.0    21.3    -      -       +      -
    581C  LYS*     4.4    23.1    -      -       +      +
    658C  GLN      3.7    14.1    -      -       -      +
    659C  GLY*     2.9     8.0    +      -       -      +
    661C  VAL*     1.3    76.7    -      -       +      +
    663C  LEU*     1.3    60.1    +      -       -      +
    665C  GLN*     3.3     6.5    +      -       -      +
    666C  ALA*     2.8    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 663 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    574C  VAL*     3.7    26.9    -      -       +      -
    578C  LEU*     4.5     7.6    -      -       +      -
    624C  LEU*     4.3     7.5    -      -       +      +
    627C  PHE*     4.2    17.0    -      -       +      -
    628C  GLU*     3.7    37.5    -      -       +      +
    631C  PHE*     3.7    30.3    -      -       +      -
    632C  ASP*     5.2     2.7    -      -       -      +
    659C  GLY      2.9    19.5    +      -       -      +
    660C  GLY*     3.9     7.0    -      -       -      +
    662C  VAL*     1.3    71.6    -      -       -      +
    664C  ARG*     1.3    67.0    +      -       -      +
    666C  ALA*     2.9     6.8    +      -       -      +
    667C  ARG*     2.9    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 664 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    657C  ASP      4.5     3.0    +      -       -      -
    660C  GLY*     2.9    31.0    +      -       -      +
    661C  VAL*     3.5    33.0    -      -       -      +
    663C  LEU*     1.3    74.6    -      -       -      +
    665C  GLN*     1.3    63.8    +      -       -      +
    667C  ARG*     3.1    22.5    +      -       -      +
    668C  ARG*     3.2    25.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 665 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    661C  VAL*     3.0    20.5    +      -       +      +
    662C  VAL*     3.6     7.0    -      -       -      +
    663C  LEU      3.2     0.2    -      -       -      -
    664C  ARG*     1.3    75.0    -      -       -      +
    666C  ALA*     1.3    64.2    +      -       -      +
    668C  ARG*     2.9    52.8    +      -       -      +
    669C  GLU*     3.2    32.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 666 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    570C  LEU*     4.3     8.1    -      -       +      +
    571C  LEU*     6.1     0.2    -      -       +      -
    574C  VAL*     3.6    27.8    -      -       +      -
    624C  LEU*     4.3    17.7    -      -       +      -
    662C  VAL      2.8    14.8    +      -       -      +
    663C  LEU*     2.9    13.0    +      -       -      +
    665C  GLN*     1.3    74.6    -      -       -      +
    667C  ARG*     1.3    63.9    +      -       -      +
    669C  GLU*     2.9    13.3    +      -       -      +
    670C  VAL*     2.9    24.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 667 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    623C  ASN*     6.4     0.2    -      -       -      +
    624C  LEU*     3.7    38.4    -      -       +      +
    625C  HIS*     4.4    13.3    -      -       -      +
    628C  GLU*     4.0    10.8    +      -       -      +
    663C  LEU      2.9    11.0    +      -       -      +
    664C  ARG*     3.2    17.7    -      -       -      +
    666C  ALA*     1.3    75.7    -      -       -      +
    668C  ARG*     1.3    56.2    +      -       +      +
    670C  VAL*     3.4    28.0    +      -       -      +
    671C  ASP*     2.9    49.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 668 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    664C  ARG*     3.5    22.9    +      -       -      +
    665C  GLN*     2.9    47.4    +      -       -      +
    667C  ARG*     1.3    76.9    -      -       +      +
    669C  GLU*     1.3    66.2    +      -       -      +
    671C  ASP*     3.4    14.0    -      -       -      +
    672C  SER*     3.2    21.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 669 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    570C  LEU*     4.2    21.1    -      -       +      -
    665C  GLN*     3.6    30.3    +      -       +      +
    666C  ALA*     2.9    10.0    +      -       -      +
    668C  ARG*     1.3    75.6    -      -       -      +
    670C  VAL*     1.3    59.9    +      -       -      +
    672C  SER*     2.9    15.9    +      -       -      -
    673C  ILE*     2.8    39.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 670 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    567C  LEU*     5.2     9.2    -      -       +      -
    570C  LEU*     3.7    19.9    -      -       +      +
    624C  LEU*     4.7    19.1    -      -       +      -
    666C  ALA      2.9    17.2    +      -       -      +
    667C  ARG*     3.6    31.2    -      -       -      +
    669C  GLU*     1.3    74.5    -      -       -      +
    671C  ASP*     1.3    65.9    +      -       -      +
    673C  ILE*     4.0     6.9    -      -       +      +
    674C  GLY*     2.8    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 671 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    667C  ARG*     2.9    42.7    +      -       -      +
    668C  ARG*     3.4    17.5    -      -       -      +
    669C  GLU      3.2     0.2    -      -       -      -
    670C  VAL*     1.3    78.3    -      -       -      +
    672C  SER*     1.3    62.5    +      -       -      +
    674C  GLY*     3.7     2.0    +      -       -      -
    675C  LEU*     3.6    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 672 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    668C  ARG      3.2     9.5    +      -       -      -
    669C  GLU*     2.9    22.7    +      -       -      -
    671C  ASP*     1.3    77.8    -      -       -      +
    673C  ILE*     1.3    73.4    +      -       -      +
    675C  LEU*     3.1    23.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 673 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    566C  PRO*     4.7    30.3    -      -       +      +
    570C  LEU*     4.3    20.2    -      -       +      -
    669C  GLU*     2.8    31.4    +      -       +      +
    670C  VAL*     4.0     5.4    -      -       +      +
    672C  SER*     1.3    82.3    +      -       -      +
    674C  GLY*     1.3    58.8    +      -       -      +
    675C  LEU*     3.2     7.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 674 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    670C  VAL*     2.8    18.6    +      -       -      -
    671C  ASP      4.1     2.9    -      -       -      -
    672C  SER      3.2     0.2    -      -       -      -
    673C  ILE*     1.3    76.4    -      -       -      +
    675C  LEU*     1.3    62.9    +      -       -      +
----------------------------------------------------------
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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