Contacts of the helix formed by residues 272 - 295 (chain C) in PDB entry 1D7W


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASP 272 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193C  GLN*     3.3    21.3    -      -       -      +
    270C  ARG      3.4     5.4    +      -       -      +
    271C  TRP*     1.3    75.5    -      -       -      +
    273C  GLY*     1.4    59.1    +      -       -      +
    274C  GLU*     3.9    10.6    -      -       -      +
    275C  ARG*     2.9    37.4    +      -       -      +
    276C  LEU*     2.9    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 273 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188C  ARG*     4.2     5.6    -      -       -      -
    192C  ASN      5.3     0.7    -      -       -      -
    193C  GLN*     2.7    45.3    +      -       -      -
    195C  GLY*     3.3    15.6    -      -       -      -
    272C  ASP*     1.4    66.3    -      -       -      +
    274C  GLU*     1.3    54.0    +      -       -      +
    276C  LEU*     3.2     1.9    +      -       -      -
    277C  TYR*     2.8    33.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 274 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188C  ARG*     2.7    38.0    +      -       -      +
    193C  GLN*     4.5     1.2    +      -       -      -
    272C  ASP*     3.5    11.5    +      -       -      +
    273C  GLY*     1.3    72.9    -      -       -      +
    275C  ARG*     1.3    58.8    +      -       -      +
    277C  TYR*     3.8     0.3    -      -       -      +
    278C  GLN*     2.8    67.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 275 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  LYS*     3.1    27.7    -      -       -      +
      7A  TYR*     3.5    21.0    +      -       -      -
    271C  TRP*     3.6    45.7    -      -       +      +
    272C  ASP*     2.9    28.4    +      -       -      +
    274C  GLU*     1.3    77.8    -      -       -      +
    276C  LEU*     1.3    56.2    +      -       -      +
    278C  GLN*     3.4     3.2    +      -       -      +
    279C  GLU*     2.9    38.0    +      -       +      +
    577C  GLU*     3.4    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 276 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193C  GLN      3.6    21.1    -      -       -      +
    194C  LEU*     3.8    20.6    -      -       -      +
    195C  GLY      4.5     2.0    -      -       -      -
    261C  ALA*     3.6    10.9    -      -       +      +
    264C  LEU*     3.7    15.0    -      -       +      +
    265C  LYS*     3.5    47.1    -      -       +      +
    271C  TRP*     3.6    30.3    -      -       +      +
    272C  ASP      2.9    20.3    +      -       -      +
    273C  GLY      3.2     3.8    +      -       -      +
    275C  ARG*     1.3    72.8    -      -       -      +
    277C  TYR*     1.3    66.0    +      -       -      +
    279C  GLU*     3.9     3.6    -      -       -      +
    280C  ALA*     3.0    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 277 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  ILE*     3.6    24.5    -      -       +      +
    177C  TYR*     3.6    33.9    +      +       -      +
    184C  ALA*     4.8     2.4    +      -       -      +
    188C  ARG*     3.4    65.3    -      -       +      +
    195C  GLY*     3.6    17.8    +      -       -      +
    196C  LEU      5.0     0.7    -      -       -      -
    197C  LEU*     4.1     4.7    -      -       +      -
    257C  HIS*     3.6    18.1    -      +       -      -
    273C  GLY      2.8    20.7    +      -       -      +
    274C  GLU      3.8     0.9    -      -       -      +
    276C  LEU*     1.3    73.9    -      -       -      +
    278C  GLN*     1.4    86.1    +      -       +      +
    281C  ARG*     2.8    43.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 278 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  TYR*     3.5    50.1    -      -       +      +
      8A  ARG      5.1     1.4    +      -       -      -
     10A  ILE*     6.0     2.4    -      -       -      +
    188C  ARG*     4.8     0.8    -      -       -      +
    274C  GLU*     2.8    47.5    +      -       +      +
    275C  ARG      3.9     1.1    -      -       -      +
    277C  TYR*     1.4    92.0    -      -       +      +
    279C  GLU*     1.4    58.3    +      -       -      +
    281C  ARG*     3.2    34.4    +      -       -      +
    282C  LYS*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 279 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  LYS*     4.5     3.5    +      -       -      -
      7A  TYR*     2.4    30.8    +      -       -      +
    264C  LEU*     3.7    20.0    -      -       +      -
    271C  TRP*     3.4    29.4    -      -       +      -
    275C  ARG*     2.9    27.7    +      -       +      +
    276C  LEU      3.9     0.9    -      -       -      +
    278C  GLN*     1.4    74.1    -      -       -      +
    280C  ALA*     1.3    65.2    +      -       -      +
    282C  LYS*     3.4    14.0    +      -       -      +
    283C  ILE*     3.2    26.9    +      -       -      +
    524C  GLN*     5.0     1.6    +      -       -      -
    575C  TRP*     3.6    24.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 280 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177C  TYR*     4.1     2.9    -      -       -      -
    257C  HIS*     3.6    35.7    -      -       +      +
    260C  LEU*     3.9     9.6    -      -       +      +
    261C  ALA*     3.8    14.6    -      -       -      +
    264C  LEU*     3.8     7.3    -      -       +      +
    276C  LEU      3.0    17.3    +      -       -      +
    279C  GLU*     1.3    73.1    -      -       -      +
    281C  ARG*     1.3    65.5    +      -       -      +
    283C  ILE*     3.1     5.4    +      -       -      +
    284C  VAL*     2.9    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 281 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  TYR*     4.7     1.0    -      -       -      +
      8A  ARG*     2.8    43.5    +      -       -      +
      9A  THR      2.9    26.7    +      -       -      -
     10A  ILE*     3.8    25.5    +      -       -      +
    172C  ASP*     4.9    12.4    +      -       -      +
    177C  TYR*     3.2    45.0    +      -       +      +
    178C  GLY      5.5     1.0    +      -       -      -
    257C  HIS*     3.9     0.6    +      -       -      -
    277C  TYR*     2.8    38.5    +      -       +      +
    278C  GLN*     3.2    30.0    +      -       -      +
    280C  ALA*     1.3    76.9    -      -       -      +
    282C  LYS*     1.4    55.2    +      -       -      +
    284C  VAL*     3.4     2.4    +      -       -      +
    285C  GLY*     3.0    26.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 282 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  LYS*     3.9    16.8    +      -       -      +
      7A  TYR*     4.3    23.1    -      -       +      -
    278C  GLN      2.9    18.3    +      -       -      +
    279C  GLU*     3.6    15.5    +      -       -      +
    280C  ALA      3.2     0.2    -      -       -      -
    281C  ARG*     1.4    73.8    -      -       -      +
    283C  ILE*     1.3    61.6    +      -       -      +
    285C  GLY*     3.5     1.5    +      -       -      -
    286C  ALA*     3.0    26.7    +      -       -      +
    512C  PHE*     6.3     0.2    -      -       -      -
    519C  VAL*     2.6    48.0    +      -       +      +
    520C  PHE*     3.5    28.5    -      -       +      -
    524C  GLN*     5.7     0.2    +      -       -      -
    575C  TRP*     6.1     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 283 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  LEU*     3.4    26.2    -      -       +      -
    264C  LEU*     4.3    13.2    -      -       +      -
    279C  GLU      3.2    13.6    +      -       -      +
    280C  ALA      3.1     7.9    +      -       -      +
    282C  LYS*     1.3    76.9    -      -       -      +
    284C  VAL*     1.3    54.2    +      -       -      +
    286C  ALA*     3.2     8.2    +      -       -      +
    287C  MET*     2.8    49.6    +      -       +      +
    520C  PHE*     4.6     3.6    -      -       +      -
    528C  LEU*     4.2    12.3    -      -       +      -
    570C  LEU*     4.5     3.1    -      -       +      -
    572C  LEU*     4.0    17.9    -      -       +      -
    575C  TRP*     3.4    44.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 284 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173C  ALA*     3.8    19.5    -      -       +      -
    176C  VAL*     4.7     9.0    -      -       +      -
    177C  TYR*     3.2    30.3    -      -       +      +
    253C  LEU*     4.6    15.9    -      -       +      +
    256C  GLU*     4.5     6.7    -      -       +      -
    257C  HIS*     4.1    17.5    -      -       +      +
    260C  LEU*     3.9    16.4    -      -       +      -
    280C  ALA      2.9    14.9    +      -       -      +
    281C  ARG      3.7     1.1    -      -       -      +
    282C  LYS      3.4     0.2    -      -       -      -
    283C  ILE*     1.3    74.1    -      -       -      +
    285C  GLY*     1.3    58.7    +      -       -      +
    287C  MET*     3.1    12.1    +      -       +      +
    288C  VAL*     3.0    31.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 285 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  ARG*     5.9     2.2    -      -       -      -
    171C  VAL      4.0     3.0    -      -       -      +
    172C  ASP*     4.3    13.2    -      -       -      -
    173C  ALA*     4.2    15.9    -      -       -      +
    281C  ARG      3.0    16.1    +      -       -      -
    282C  LYS*     3.9     2.5    -      -       -      -
    284C  VAL*     1.3    76.1    -      -       -      +
    286C  ALA*     1.3    60.9    +      -       -      +
    288C  VAL*     3.4     4.0    +      -       -      +
    289C  GLN*     3.2    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 286 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282C  LYS      3.0    14.8    +      -       -      +
    283C  ILE*     3.2    10.3    +      -       -      +
    285C  GLY*     1.3    74.6    -      -       -      +
    287C  MET*     1.3    59.8    +      -       -      +
    289C  GLN*     3.3     4.5    +      -       -      +
    290C  ILE*     2.9    37.5    +      -       +      +
    514C  TRP*     4.1    15.7    -      -       +      -
    520C  PHE*     3.8    25.8    -      -       +      -
    528C  LEU*     4.3    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 287 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253C  LEU*     6.0     4.0    -      -       +      -
    256C  GLU*     3.3    36.6    -      -       -      +
    260C  LEU*     4.4     0.2    -      -       -      -
    283C  ILE*     2.8    37.7    +      -       +      +
    284C  VAL*     3.1    13.4    +      -       +      +
    286C  ALA*     1.3    77.3    -      -       +      +
    288C  VAL*     1.3    62.4    +      -       +      +
    291C  ILE*     3.0    33.0    +      -       +      +
    528C  LEU*     5.4     1.1    -      -       +      -
    531C  ILE*     3.9    37.9    -      -       +      +
    536C  ILE*     3.7    19.1    -      -       +      -
    570C  LEU*     4.0     8.1    -      -       +      -
   1609C  ACT      3.8    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 288 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  TRP*     3.8    25.2    -      -       +      -
     93A  LEU*     4.6     4.9    -      -       +      -
     96A  ASP*     3.7    14.6    -      -       -      +
    171C  VAL*     3.7    18.6    -      -       +      -
    173C  ALA*     4.1    18.2    -      -       +      +
    175C  MET*     4.3     8.5    -      -       +      -
    253C  LEU*     4.3    22.9    -      -       +      -
    284C  VAL*     3.0    14.9    +      -       +      +
    285C  GLY      3.8     7.0    -      -       -      +
    286C  ALA      3.3     0.2    -      -       -      -
    287C  MET*     1.3    76.3    -      -       +      +
    289C  GLN*     1.4    56.3    +      -       -      +
    292C  THR*     2.7    41.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 289 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  ARG*     3.2     9.1    -      -       -      +
    171C  VAL*     3.0    37.3    +      -       +      +
    285C  GLY      3.2    18.6    +      -       -      +
    286C  ALA      3.3     5.4    +      -       -      +
    288C  VAL*     1.4    75.2    -      -       -      +
    290C  ILE*     1.4    56.6    +      -       -      +
    292C  THR*     3.3     1.5    +      -       -      -
    293C  TYR*     2.9    36.8    +      -       -      +
    510C  ASP*     3.1    24.7    +      -       -      -
    512C  PHE      4.7     0.4    -      -       -      -
    513C  TRP*     3.3    32.0    -      -       +      +
    514C  TRP*     2.8    38.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 290 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286C  ALA*     2.9    23.6    +      -       +      +
    287C  MET      4.0     2.7    -      -       -      +
    289C  GLN*     1.4    71.6    -      -       -      +
    291C  ILE*     1.3    67.4    +      -       -      +
    293C  TYR*     5.4     0.9    -      -       -      -
    294C  ARG*     2.9    67.6    +      -       +      +
    514C  TRP*     3.7    40.4    -      -       +      +
    528C  LEU*     3.3    40.6    -      -       +      +
    529C  ALA*     4.6     1.6    -      -       -      +
    531C  ILE*     4.0    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 291 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  TRP*     3.7    33.7    -      -       +      -
    253C  LEU*     6.2     0.9    -      -       +      -
    287C  MET*     3.0    24.2    +      -       +      +
    290C  ILE*     1.3    75.4    -      -       -      +
    292C  THR*     1.3    56.4    +      -       -      +
    295C  ASP*     3.0    25.9    +      -       -      +
    296C  TYR*     3.0    23.0    +      -       -      +
    531C  ILE*     3.8    13.5    -      -       +      -
    532C  SER*     4.8     0.4    -      -       -      -
    533C  LEU*     4.1    29.4    -      -       +      +
    536C  ILE*     4.0    26.5    -      -       +      -
    551C  ILE*     5.7     0.2    -      -       +      -
    552C  PHE*     3.6    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 292 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  TRP*     2.9    19.3    +      -       -      +
     93A  LEU*     3.5    36.2    -      -       +      +
    171C  VAL*     5.0     1.3    -      -       +      -
    288C  VAL*     2.7    24.3    +      -       -      +
    289C  GLN*     3.6     4.3    -      -       -      -
    290C  ILE      3.1     0.2    -      -       -      -
    291C  ILE*     1.3    77.0    -      -       -      +
    293C  TYR*     1.3    77.0    +      -       +      +
    296C  TYR*     3.2    10.6    +      -       +      +
    297C  LEU*     2.7    43.5    +      -       +      +
    503C  PHE*     4.1     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 293 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171C  VAL*     4.3    10.2    -      -       +      +
    289C  GLN*     2.9    19.4    +      -       -      +
    290C  ILE*     5.4     0.7    -      -       -      -
    292C  THR*     1.3    90.3    -      -       +      +
    294C  ARG*     1.3    62.8    +      -       -      +
    297C  LEU*     3.8    17.7    -      -       +      -
    298C  PRO*     3.5    17.5    -      -       -      +
    306C  MET*     4.1    14.6    -      -       +      +
    310C  LEU*     4.0    18.8    -      -       +      -
    503C  PHE*     2.7    48.0    +      +       -      -
    506C  LEU*     3.7     6.8    -      -       -      +
    507C  ARG*     3.5    24.6    +      -       +      -
    513C  TRP*     3.3    40.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 294 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290C  ILE*     2.9    43.3    +      -       +      +
    291C  ILE*     5.1     0.2    -      -       -      +
    293C  TYR*     1.3    78.5    -      -       -      +
    295C  ASP*     1.3    89.4    +      -       -      +
    298C  PRO*     3.6    15.1    -      -       -      +
    529C  ALA*     2.9    27.5    +      -       -      +
    531C  ILE*     2.9    26.9    +      -       -      +
    532C  SER*     4.0    12.1    -      -       -      +
    549C  ASN*     5.7     1.6    -      -       -      +
    550C  ASN*     4.8     1.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 295 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291C  ILE*     3.0    27.5    +      -       -      +
    294C  ARG*     1.3   125.0    +      -       -      +
    296C  TYR*     1.3    61.0    +      -       -      +
    298C  PRO*     3.8     2.5    -      -       -      -
    299C  LEU*     3.9    12.0    -      -       -      +
    532C  SER*     5.7     0.2    -      -       -      -
    533C  LEU*     5.4     2.3    +      -       -      +
    549C  ASN*     6.4     0.2    -      -       -      -
    550C  ASN*     3.0    38.2    +      -       -      +
    551C  ILE*     5.6     3.3    -      -       +      +
    552C  PHE*     3.5    18.5    -      -       +      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il