Contacts of the helix formed by residues 296 - 319 (chain C) in PDB entry 5COX


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 PRO 296 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295C  VAL*     1.3    83.2    -      -       -      +
    297C  GLY*     1.3    56.7    +      -       -      +
    298C  LEU      3.3     0.2    -      -       -      -
    299C  MET*     4.1    10.4    -      -       +      +
    300C  MET*     3.1    28.4    +      -       -      +
    407C  PHE*     3.3    39.7    -      -       +      +
    410C  ASN      2.9    33.4    -      -       -      +
    411C  ASN*     4.4     4.7    -      -       -      +
    413C  ILE*     4.6     2.9    -      -       +      -
    414C  LEU*     4.4     9.5    -      -       +      +
    422C  PHE*     3.9    27.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 297 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200C  PHE*     3.6    44.1    -      -       -      +
    295C  VAL*     2.6    14.3    +      -       -      +
    296C  PRO*     1.3    74.2    -      -       -      +
    298C  LEU*     1.3    63.7    +      -       -      +
    300C  MET*     3.5    22.1    -      -       -      +
    301C  TYR*     3.8     6.6    -      -       -      -
    407C  PHE*     4.3     2.0    -      -       -      -
    426C  PHE*     4.4     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 298 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200C  PHE      4.2     2.5    -      -       -      +
    203C  GLN*     3.4    52.5    -      -       +      +
    204C  HIS*     3.7    26.7    +      -       +      +
    207C  HIS*     5.9     1.1    -      -       +      -
    291C  VAL*     5.3     3.8    -      -       +      +
    292C  PHE*     3.8    42.6    -      -       +      +
    294C  LEU*     5.4     0.7    -      -       +      -
    295C  VAL*     2.8    26.6    +      -       +      +
    297C  GLY*     1.3    74.3    -      -       -      +
    299C  MET*     1.3    60.4    +      -       -      +
    300C  MET      2.8     8.8    +      -       -      -
    301C  TYR*     2.9     8.1    +      -       -      +
    302C  ALA*     2.8    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 299 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263C  PRO*     4.0     4.9    -      -       -      -
    275C  TYR*     3.5    23.8    -      -       -      +
    285C  PHE*     3.3    41.5    -      -       +      +
    287C  VAL*     3.4    27.4    -      -       +      -
    292C  PHE*     3.0    33.2    +      -       +      +
    293C  GLY*     3.7     5.8    -      -       -      -
    295C  VAL      3.5     7.8    +      -       -      +
    296C  PRO*     4.4     8.7    -      -       +      +
    298C  LEU*     1.3    78.8    -      -       -      +
    300C  MET*     1.3    59.2    +      -       -      +
    302C  ALA*     3.7     6.2    -      -       -      -
    303C  THR*     2.7    32.8    +      -       -      +
    411C  ASN*     6.1     2.9    -      -       +      -
    414C  LEU*     3.9    14.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 300 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197C  MET*     3.5    34.3    -      -       +      -
    200C  PHE*     4.7     1.8    -      -       +      -
    296C  PRO      3.1    17.9    +      -       -      +
    297C  GLY*     3.5    17.7    -      -       -      +
    298C  LEU      2.8     2.8    +      -       -      -
    299C  MET*     1.3    73.3    -      -       -      +
    301C  TYR*     1.3    70.5    +      -       +      +
    303C  THR*     3.1     6.4    +      -       -      -
    304C  ILE*     3.0    45.9    +      -       +      +
    414C  LEU*     4.4    10.1    -      -       +      +
    419C  LEU*     3.7    17.4    -      -       +      +
    422C  PHE*     4.1    23.8    -      -       +      +
    423C  VAL*     4.1     9.9    -      -       -      -
    426C  PHE*     4.0    17.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 301 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197C  MET*     2.8    41.0    +      -       +      +
    200C  PHE*     3.6     8.5    -      -       +      -
    201C  PHE*     3.0    61.4    -      +       -      +
    204C  HIS*     3.8    24.2    -      +       +      -
    297C  GLY      3.8    14.3    +      -       -      -
    298C  LEU      2.9     6.8    +      -       -      +
    300C  MET*     1.3    82.7    -      -       +      +
    302C  ALA*     1.3    56.9    +      -       -      +
    303C  THR      2.9     4.9    -      -       -      -
    304C  ILE*     2.8    40.7    +      -       +      +
    305C  TRP*     2.9    25.5    +      -       +      -
    564C  ILE*     3.9    11.2    -      -       +      +
    567C  LEU*     5.1     1.6    -      -       +      -
    568C  ILE*     4.5     5.6    -      -       +      -
    580C  PHE*     3.6     4.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 302 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204C  HIS*     3.8    19.6    -      -       +      -
    232C  HIS      6.0     0.7    -      -       -      +
    233C  ILE*     5.7     3.1    -      -       -      +
    263C  PRO*     4.6     4.1    -      -       -      +
    287C  VAL*     4.0    27.7    -      -       +      +
    292C  PHE*     4.3     7.9    -      -       +      -
    298C  LEU      2.8    15.7    +      -       -      +
    299C  MET*     3.8    12.3    -      -       -      +
    301C  TYR*     1.3    76.6    -      -       -      +
    303C  THR*     1.3    57.7    +      -       -      +
    305C  TRP*     4.2     3.2    -      -       -      +
    306C  LEU*     3.5    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 303 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261C  VAL*     3.4    26.9    -      -       +      +
    262C  TYR*     3.9    10.6    -      -       +      -
    263C  PRO*     3.2    32.2    -      -       +      +
    299C  MET*     2.7    25.6    +      -       -      +
    300C  MET      3.6     4.7    -      -       -      -
    301C  TYR      2.9     0.6    -      -       -      -
    302C  ALA*     1.3    76.1    -      -       -      +
    304C  ILE*     1.3    60.0    +      -       -      +
    305C  TRP      3.3     0.4    -      -       -      -
    306C  LEU*     3.6     4.4    -      -       +      +
    307C  ARG*     2.9    50.0    +      -       +      +
    414C  LEU*     4.7     1.7    -      -       -      +
    419C  LEU*     4.2     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 304 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300C  MET*     3.0    33.1    +      -       +      +
    301C  TYR*     2.8    29.4    +      -       +      +
    303C  THR*     1.3    78.4    -      -       -      +
    305C  TRP*     1.3    56.1    +      -       -      +
    307C  ARG*     3.4    10.9    -      -       -      +
    308C  GLU*     2.9    25.1    +      -       -      +
    419C  LEU*     4.0    12.8    -      -       +      -
    423C  VAL*     4.4     2.7    -      -       +      -
    567C  LEU*     3.9    41.1    -      -       +      +
    568C  ILE*     3.9    23.6    -      -       +      -
    571C  ASN*     3.7     7.2    -      -       +      -
    572C  VAL*     4.3    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 305 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201C  PHE*     4.8    17.0    -      +       -      -
    204C  HIS*     3.4    34.6    +      +       -      +
    232C  HIS*     5.7     1.5    +      -       -      -
    233C  ILE*     3.5    32.9    -      -       +      +
    301C  TYR*     2.9    21.7    +      +       +      +
    302C  ALA*     4.8     2.7    -      -       -      +
    304C  ILE*     1.3    72.1    -      -       -      +
    306C  LEU*     1.3    68.0    +      -       -      +
    307C  ARG      3.1     1.1    -      -       -      -
    308C  GLU*     2.8    13.8    +      -       +      +
    309C  HIS*     2.8    23.9    +      -       -      +
    336C  LEU*     4.1    30.8    -      -       +      +
    339C  GLU*     4.2     9.4    -      -       +      -
    340C  THR*     3.3    40.8    -      -       +      -
    343C  ILE*     4.6     6.5    -      -       +      -
    567C  LEU*     3.5    46.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 306 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233C  ILE*     4.9     8.8    -      -       +      +
    252C  LEU*     4.8     9.2    -      -       +      -
    253C  LYS      3.9    16.8    -      -       -      +
    254C  TYR*     4.0     9.9    -      -       +      -
    261C  VAL*     3.7    26.9    -      -       +      -
    263C  PRO*     3.5    41.7    -      -       +      -
    264C  PRO*     4.3     1.6    -      -       +      -
    287C  VAL*     6.0     2.7    -      -       -      -
    302C  ALA      3.5    17.0    +      -       -      +
    303C  THR*     3.4     5.7    +      -       +      +
    305C  TRP*     1.3    77.7    -      -       -      +
    307C  ARG*     1.3    68.6    +      -       +      +
    309C  HIS*     3.1    19.3    +      -       -      +
    310C  GLN*     3.6    17.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 307 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  GLU*     3.3    32.7    +      -       -      +
    261C  VAL*     2.4    59.7    +      -       +      +
    303C  THR*     2.9    39.1    +      -       +      +
    304C  ILE*     3.4    10.1    -      -       -      +
    306C  LEU*     1.3    81.4    -      -       +      +
    308C  GLU*     1.3    60.6    +      -       -      +
    310C  GLN*     3.9     5.8    +      -       -      +
    311C  ARG*     3.4    17.3    +      -       -      +
    419C  LEU*     4.3    23.3    -      -       -      +
    571C  ASN*     3.1    41.7    +      -       +      +
    572C  VAL*     5.2     0.6    -      -       -      +
    573C  LYS      5.0     4.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 308 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304C  ILE      2.9    15.0    +      -       -      +
    305C  TRP*     2.8    29.2    +      -       +      +
    307C  ARG*     1.3    74.8    -      -       -      +
    309C  HIS*     1.3    68.8    +      -       -      +
    311C  ARG*     2.6    49.1    +      -       -      +
    312C  VAL*     3.2    15.9    +      -       -      +
    336C  LEU*     4.1     4.9    -      -       +      +
    339C  GLU*     2.7    34.8    -      -       -      +
    567C  LEU*     4.1     9.1    -      -       +      -
    570C  ASN*     5.3     1.0    +      -       -      -
    571C  ASN*     3.3    16.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 309 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233C  ILE*     5.7     1.1    -      -       +      -
    234C  TYR*     2.5    45.5    +      +       -      +
    250C  GLY      3.1    25.9    +      -       -      -
    252C  LEU*     3.3    20.8    -      -       +      +
    305C  TRP      2.8    14.0    +      -       -      +
    306C  LEU*     3.1    11.4    +      -       -      +
    308C  GLU*     1.3    71.0    -      -       -      +
    310C  GLN*     1.3    71.6    +      -       -      +
    311C  ARG      2.7     0.9    +      -       -      -
    312C  VAL*     2.7    31.4    +      -       -      +
    313C  CYS*     3.0    18.4    +      -       -      +
    329C  PHE*     3.9     9.8    -      +       -      -
    332C  SER*     3.5    19.3    +      -       -      -
    333C  LYS      4.0     2.9    -      -       -      -
    336C  LEU*     3.7    12.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 310 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251C  LYS*     3.3    31.6    -      -       +      +
    252C  LEU*     2.4    54.4    +      -       -      +
    254C  TYR*     3.2    24.3    -      -       +      -
    306C  LEU*     3.6    14.5    +      -       -      +
    307C  ARG*     4.1     7.4    -      -       -      +
    309C  HIS*     1.3    81.3    -      -       -      +
    311C  ARG*     1.3    56.6    +      -       -      +
    313C  CYS*     3.2    10.1    -      -       -      +
    314C  ASP*     2.8    34.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 311 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307C  ARG      3.4    12.0    +      -       -      +
    308C  GLU*     2.6    51.7    +      -       -      +
    309C  HIS      2.7     4.9    +      -       -      -
    310C  GLN*     1.3    74.0    -      -       -      +
    312C  VAL*     1.3    69.5    +      -       -      +
    313C  CYS      3.3     0.2    +      -       -      -
    314C  ASP*     3.3     6.8    +      -       -      +
    315C  ILE*     3.0    50.6    +      -       +      +
    339C  GLU*     4.8     2.2    +      -       -      -
    558C  ILE*     4.8    11.3    -      -       -      +
    570C  ASN*     3.7    45.3    +      -       -      +
    571C  ASN*     4.1     5.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 312 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308C  GLU*     3.2    12.7    +      -       -      +
    309C  HIS      2.7    12.8    +      -       -      +
    311C  ARG*     1.3    74.3    -      -       -      +
    313C  CYS*     1.3    64.6    +      -       -      +
    315C  ILE*     2.9     9.3    +      -       -      +
    316C  LEU*     2.8    35.3    +      -       +      +
    332C  SER*     3.3    24.2    -      -       -      +
    335C  ILE*     3.8    17.7    -      -       +      -
    336C  LEU*     3.8    22.0    -      -       +      -
    558C  ILE*     3.8    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 313 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  ASP      3.3    26.5    -      -       -      +
    250C  GLY*     3.5    24.7    -      -       -      -
    251C  LYS*     3.7     6.1    -      -       +      -
    309C  HIS*     3.0    22.4    +      -       -      -
    310C  GLN*     3.2    11.7    -      -       -      +
    312C  VAL*     1.3    74.8    -      -       -      +
    314C  ASP*     1.3    59.1    +      -       -      +
    316C  LEU*     2.7    24.8    +      -       -      +
    317C  LYS*     2.7    17.7    +      -       -      +
    328C  LEU*     4.4     6.0    -      -       -      +
    332C  SER*     3.4    21.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 314 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  ASP*     4.9     0.2    -      -       -      +
    251C  LYS*     2.9    42.4    +      -       -      -
    310C  GLN*     2.8    16.0    +      -       -      +
    311C  ARG*     3.8     6.9    -      -       -      +
    313C  CYS*     1.3    73.9    -      -       -      +
    315C  ILE*     1.3    60.1    +      -       +      +
    317C  LYS*     4.1    19.4    +      -       -      +
    318C  GLN*     3.3    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 315 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    311C  ARG*     3.0    50.5    -      -       +      +
    312C  VAL*     2.9     8.7    +      -       -      +
    313C  CYS      2.8     2.0    +      -       -      -
    314C  ASP*     1.3    74.9    -      -       +      +
    316C  LEU*     1.3    68.8    +      -       +      +
    318C  GLN*     3.2     7.1    +      -       -      +
    319C  GLU*     3.1    23.9    +      -       +      +
    554C  VAL*     3.8    29.8    -      -       +      -
    558C  ILE*     3.8    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 316 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312C  VAL*     2.8    29.5    +      -       +      +
    313C  CYS*     2.7    12.6    +      -       -      +
    315C  ILE*     1.3    77.3    -      -       +      +
    317C  LYS*     1.3    50.7    +      -       -      +
    319C  GLU*     2.9    11.9    +      -       +      +
    320C  HIS*     2.6    37.9    +      -       -      +
    323C  TRP*     4.0    13.9    -      -       +      -
    328C  LEU*     3.5    17.5    -      -       +      +
    331C  THR*     3.7    31.4    -      -       +      -
    332C  SER*     3.9     9.0    -      -       -      +
    335C  ILE*     4.0    11.2    -      -       +      -
    550C  PHE      4.2    13.2    -      -       -      +
    551C  GLY*     4.8     8.5    -      -       -      +
    554C  VAL*     5.0     2.7    -      -       +      -
    555C  GLY*     4.6    11.2    -      -       -      +
    558C  ILE*     5.5     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 317 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  ASP*     2.8    39.1    +      -       +      +
    251C  LYS*     6.0     0.2    -      -       -      +
    313C  CYS      2.7    21.3    +      -       -      +
    314C  ASP*     4.3    15.1    +      -       -      +
    316C  LEU*     1.3    69.2    -      -       -      +
    318C  GLN*     1.3    66.7    +      -       -      +
    320C  HIS      3.6    16.5    -      -       -      +
    321C  PRO*     3.7     6.9    -      -       +      +
    328C  LEU*     3.4    26.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 318 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    314C  ASP      3.3    13.5    +      -       -      +
    315C  ILE*     3.2    11.4    +      -       -      +
    316C  LEU      3.0     0.6    -      -       -      -
    317C  LYS*     1.3    81.3    -      -       -      +
    319C  GLU*     1.3    85.3    +      -       +      +
    320C  HIS      3.0     2.1    +      -       -      -
    321C  PRO*     3.5    16.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 319 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315C  ILE*     3.1    11.6    +      -       +      +
    316C  LEU*     2.9    13.2    +      -       +      +
    318C  GLN*     1.3    98.1    +      -       +      +
    320C  HIS*     1.3    78.6    +      -       +      +
    321C  PRO*     3.4     7.7    -      -       -      +
    551C  GLY      5.4     1.6    -      -       -      +
    554C  VAL*     4.0    36.0    -      -       +      +
     50D  THR*     5.1     4.9    -      -       -      +
----------------------------------------------------------
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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