Contacts of the helix formed by residues 230 - 254 (chain B) in PDB entry 2QVS


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 ARG 230 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  ALA*     5.0     1.3    -      -       +      -
     99B  GLU*     2.5    37.0    +      -       +      +
    169B  GLY      3.2    17.6    +      -       -      -
    170B  ASP*     2.9    35.2    +      -       -      +
    206B  ALA      2.6    38.9    +      -       -      +
    207B  LEU*     3.6    21.9    -      -       -      +
    208B  MET      3.7    26.2    -      -       -      -
    209B  TYR      3.9     5.1    +      -       -      -
    210B  ASN*     3.4    26.9    -      -       -      +
    228B  LEU      3.7     1.0    +      -       -      -
    229B  ASP*     1.3    72.3    +      -       -      +
    231B  VAL*     1.3    60.5    +      -       +      +
    233B  PHE*     2.9     4.2    +      -       -      +
    234B  ARG*     2.7    39.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99B  GLU*     3.6    37.2    -      -       +      +
    229B  ASP*     3.4    15.0    +      -       -      +
    230B  ARG*     1.3    81.9    -      -       +      +
    232B  THR*     1.3    61.9    +      -       -      +
    234B  ARG*     4.2     4.0    -      -       -      +
    235B  ARG*     2.9    53.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  VAL*     4.3    18.3    -      -       +      +
    150B  ALA*     3.7    32.1    -      -       +      +
    228B  LEU*     4.5     4.5    -      -       +      -
    229B  ASP*     2.8    36.4    +      -       -      +
    231B  VAL*     1.3    75.0    -      -       -      +
    233B  PHE*     1.3    63.7    +      -       -      +
    235B  ARG*     3.9     4.2    -      -       -      +
    236B  ILE*     3.0    29.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 233 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135B  LEU*     4.0    33.9    -      -       +      -
    136B  PHE*     4.2    17.5    -      +       -      -
    139B  LEU*     4.7     5.2    -      -       +      -
    147B  VAL*     4.0    16.6    -      -       +      -
    207B  LEU*     3.7    38.6    -      -       +      -
    228B  LEU*     3.6    32.3    -      -       +      +
    229B  ASP      2.9    11.3    +      -       -      +
    230B  ARG      2.9     7.6    +      -       -      +
    232B  THR*     1.3    76.2    -      -       -      +
    234B  ARG*     1.3    76.3    +      -       +      +
    236B  ILE*     3.4     5.6    +      -       -      +
    237B  ILE*     3.3    45.5    +      -       +      +
    212E  SER*     5.7     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 234 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  ALA*     3.6    21.0    -      -       -      +
     99B  GLU*     4.4    10.2    +      -       +      +
    101B  PHE*     5.6     0.4    -      -       -      -
    207B  LEU      3.6    23.8    -      -       -      +
    208B  MET      4.4     3.1    -      -       -      -
    230B  ARG*     2.7    30.1    +      -       +      +
    231B  VAL*     4.2     4.5    -      -       -      +
    233B  PHE*     1.3    80.8    -      -       +      +
    235B  ARG*     1.3    60.4    +      -       +      +
    237B  ILE*     3.2     4.9    +      -       -      +
    238B  VAL*     2.9    42.9    +      -       +      +
    196E  TRP      3.7    12.3    +      -       -      -
    197E  TPO      4.0     2.8    -      -       -      -
    198E  LEU*     3.0    51.9    -      -       -      +
    209E  ILE      4.8     1.2    +      -       -      -
    212E  SER*     3.0    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 235 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  PHE*     3.5    50.5    -      -       +      -
    106B  GLU*     3.1    25.9    +      -       -      +
    231B  VAL*     2.9    45.7    +      -       +      +
    232B  THR*     3.9     4.7    -      -       -      +
    234B  ARG*     1.3    76.9    -      -       +      +
    236B  ILE*     1.3    61.9    +      -       -      +
    239B  LYS*     3.1    45.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 236 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  VAL*     5.6     4.3    -      -       +      -
    143B  GLN*     4.4     3.8    -      -       -      +
    146B  GLN*     3.4    60.1    +      -       +      +
    147B  VAL*     3.9    21.8    -      -       +      -
    150B  ALA*     3.6    21.8    -      -       +      -
    228B  LEU*     5.7     0.2    -      -       +      -
    232B  THR*     3.0    25.0    +      -       +      +
    233B  PHE*     3.8     5.4    -      -       -      +
    235B  ARG*     1.3    76.7    -      -       +      +
    237B  ILE*     1.3    63.8    +      -       +      +
    239B  LYS*     3.9     4.4    -      -       -      +
    240B  ASN*     3.1    27.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 237 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139B  LEU*     3.7    24.7    -      -       +      -
    143B  GLN*     3.6    29.5    -      -       +      +
    147B  VAL*     4.0    17.0    -      -       +      -
    233B  PHE*     3.3    38.3    +      -       +      +
    234B  ARG*     3.2     5.1    +      -       -      +
    236B  ILE*     1.3    75.2    -      -       +      +
    238B  VAL*     1.3    61.3    +      -       -      +
    240B  ASN      3.3     0.5    +      -       -      -
    241B  ASN*     2.9    48.1    +      -       -      +
    211E  LEU      4.5     3.6    -      -       -      +
    212E  SER*     3.9    20.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 238 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  PHE*     3.9    15.9    -      -       +      -
    103B  PRO*     3.6    30.3    -      -       +      -
    234B  ARG*     2.9    38.1    +      -       +      +
    237B  ILE*     1.3    71.4    -      -       -      +
    239B  LYS*     1.3    59.6    +      -       -      +
    241B  ASN*     3.1     2.3    +      -       -      +
    242B  ALA*     2.8    28.9    +      -       -      +
    196E  TRP*     3.6    41.1    -      -       +      +
    212E  SER*     4.4    15.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 239 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  PHE*     3.0    27.5    -      -       +      -
    103B  PRO      4.0    17.6    -      -       -      +
    105B  GLU*     4.6    17.0    +      -       +      +
    106B  GLU*     3.3    35.0    +      -       -      +
    108B  GLU*     5.6     4.5    -      -       -      +
    235B  ARG*     3.1    37.2    +      -       -      +
    236B  ILE*     3.9     4.5    -      -       -      +
    238B  VAL*     1.3    79.0    -      -       -      +
    240B  ASN*     1.3    57.4    +      -       -      +
    242B  ALA*     3.4     1.9    +      -       -      +
    243B  LYS*     3.0    36.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 240 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  ASP*     3.9     5.7    -      -       -      +
    142B  GLU*     4.1    15.6    -      -       -      +
    143B  GLN*     3.3    33.3    -      -       +      +
    146B  GLN*     3.9    21.8    +      -       -      +
    236B  ILE*     3.1    17.6    +      -       +      +
    237B  ILE      3.7     2.9    -      -       -      +
    239B  LYS*     1.3    81.3    -      -       -      +
    241B  ASN*     1.3    58.2    +      -       -      +
    243B  LYS*     3.3     9.2    +      -       -      +
    244B  LYS*     3.0    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 241 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139B  LEU*     5.9     0.8    -      -       -      +
    143B  GLN*     3.2    25.1    +      -       -      +
    237B  ILE*     2.9    30.9    +      -       -      +
    240B  ASN*     1.3    76.1    -      -       -      +
    242B  ALA*     1.3    57.6    +      -       -      +
    244B  LYS*     3.6    17.8    +      -       -      +
    245B  ARG*     2.9    32.2    +      -       -      +
    196E  TRP*     3.6    19.1    -      -       +      -
    211E  LEU      4.5     0.8    +      -       -      -
    212E  SER      2.9    25.0    +      -       -      +
    213E  LYS*     4.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 242 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103B  PRO*     4.0    22.7    -      -       +      +
    104B  ASP*     4.7     9.9    -      -       -      +
    105B  GLU      5.8     0.2    -      -       -      +
    238B  VAL      2.8    16.6    +      -       -      +
    239B  LYS      3.8     3.8    -      -       -      +
    241B  ASN*     1.3    74.5    -      -       -      +
    243B  LYS*     1.3    63.2    +      -       -      +
    245B  ARG*     3.8     4.4    -      -       -      +
    246B  LYS*     3.3    21.3    +      -       -      +
    196E  TRP*     3.4    28.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 243 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  GLU*     2.9    40.3    +      -       -      +
    108B  GLU*     3.3    22.4    +      -       -      -
    239B  LYS*     3.0    24.3    +      -       -      +
    240B  ASN*     3.6    10.8    -      -       -      +
    241B  ASN      3.2     0.2    -      -       -      -
    242B  ALA*     1.3    76.7    -      -       -      +
    244B  LYS*     1.3    64.4    +      -       -      +
    246B  LYS*     3.3     9.4    +      -       +      +
    247B  MET*     3.0    24.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 244 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  ASP*     2.8    31.5    +      -       -      +
    143B  GLN*     4.1     2.4    -      -       -      +
    240B  ASN*     3.0    25.4    +      -       -      +
    241B  ASN*     3.6    20.4    +      -       -      +
    243B  LYS*     1.3    77.5    -      -       -      +
    245B  ARG*     1.3    55.5    +      -       +      +
    247B  MET*     3.2    14.7    +      -       +      +
    248B  PHE*     2.8    69.2    +      -       +      -
    275B  GLU*     4.6     9.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 245 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241B  ASN      2.9    14.3    +      -       -      +
    242B  ALA*     3.8     5.6    -      -       -      +
    244B  LYS*     1.3    77.0    -      -       +      +
    246B  LYS*     1.3    57.7    +      -       -      +
    248B  PHE*     3.7     2.9    -      -       +      +
    249B  GLU*     2.8    31.3    +      -       -      +
    267B  MET*     4.3     9.9    +      -       +      +
    270B  VAL*     3.8    30.5    -      -       +      +
    271B  ASP*     2.6    37.7    +      -       -      +
    194E  ARG*     3.4    27.0    -      -       -      +
    196E  TRP*     3.6    27.9    -      -       -      -
    213E  LYS*     2.9    30.7    +      -       -      +
    214E  GLY*     3.4    17.4    +      -       -      -
    277E  LEU*     6.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 246 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104B  ASP*     5.1    14.6    +      -       -      +
    105B  GLU*     3.1    26.1    +      -       -      +
    242B  ALA      3.3    11.9    +      -       -      +
    243B  LYS*     3.3    11.8    +      -       +      +
    245B  ARG*     1.3    79.6    -      -       -      +
    247B  MET*     1.3    57.3    +      -       -      +
    249B  GLU*     3.4     8.7    -      -       +      +
    250B  SER*     3.1    26.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 247 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243B  LYS*     3.0    14.7    +      -       +      +
    244B  LYS*     3.4    15.9    -      -       +      +
    246B  LYS*     1.3    76.4    -      -       -      +
    248B  PHE*     1.3    73.4    +      -       +      +
    250B  SER*     3.4     7.1    +      -       -      -
    251B  PHE*     3.3    48.4    +      -       +      -
    275B  GLU*     4.5     7.0    -      -       -      +
    298B  GLU*     3.6    26.2    -      -       -      +
    354B  LYS*     5.3     6.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 248 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244B  LYS*     2.8    52.7    +      -       +      +
    245B  ARG*     3.7     4.7    -      -       +      +
    247B  MET*     1.3    81.0    -      -       +      +
    249B  GLU*     1.3    63.5    +      -       -      +
    251B  PHE*     3.2    11.1    +      -       -      +
    252B  ILE*     3.1    22.8    +      -       +      +
    270B  VAL*     3.7    27.1    -      -       +      -
    273B  ILE*     3.7    32.8    -      -       +      -
    275B  GLU*     3.4    38.1    -      -       +      -
    298B  GLU*     4.4     2.2    -      -       -      -
    356B  LEU*     3.3    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 249 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245B  ARG      2.8    18.3    +      -       -      +
    246B  LYS*     3.4    11.7    -      -       +      +
    248B  PHE*     1.3    77.4    -      -       -      +
    250B  SER*     1.3    56.5    +      -       -      +
    252B  ILE*     3.3     2.9    +      -       -      +
    253B  GLU*     3.0    32.1    +      -       +      +
    263B  MET*     4.5     9.4    -      -       -      +
    266B  ARG*     2.7    56.8    +      -       -      +
    267B  MET*     4.4    13.3    +      -       +      +
    270B  VAL*     3.5    16.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 250 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246B  LYS      3.1    13.8    +      -       -      -
    247B  MET*     3.6    11.7    -      -       -      -
    248B  PHE      3.2     0.2    -      -       -      -
    249B  GLU*     1.3    78.5    -      -       -      +
    251B  PHE*     1.3    59.2    +      -       -      +
    253B  GLU*     3.2     6.5    +      -       -      +
    254B  SER*     3.0    32.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 251 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247B  MET*     3.3    40.9    +      -       +      -
    248B  PHE      3.2     7.8    +      -       -      +
    250B  SER*     1.3    81.3    -      -       -      +
    252B  ILE*     1.3    59.3    +      -       -      +
    254B  SER*     3.6     9.5    +      -       -      -
    255B  VAL*     2.9    25.5    -      -       -      +
    296B  ILE*     3.9    10.3    -      -       +      +
    297B  ILE      3.8    12.6    -      -       -      -
    298B  GLU*     3.4    46.9    -      -       +      -
    328B  LYS*     4.3    16.4    -      -       +      -
    329B  GLY*     4.0    20.1    -      -       -      +
    356B  LEU*     3.8    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 252 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248B  PHE*     3.1    20.4    -      -       +      +
    249B  GLU*     3.7     8.1    -      -       -      +
    250B  SER      3.1     0.4    -      -       -      -
    251B  PHE*     1.3    75.9    -      -       -      +
    253B  GLU*     1.3    66.7    +      -       -      +
    255B  VAL*     3.2    24.9    +      -       -      +
    258B  PHE*     3.8    29.1    -      -       +      +
    261B  LEU*     4.6     4.7    -      -       +      -
    266B  ARG*     4.3    23.8    -      -       +      -
    269B  ILE*     4.4    14.1    -      -       +      -
    270B  VAL*     4.6    10.3    -      -       +      -
    273B  ILE*     4.0    22.2    -      -       +      -
    294B  PHE*     6.0     0.4    -      -       +      -
    296B  ILE*     3.6    23.8    -      -       +      -
    356B  LEU*     4.6     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 253 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249B  GLU*     3.0    20.7    +      -       +      +
    250B  SER*     3.2     8.0    +      -       -      +
    252B  ILE*     1.3    78.7    -      -       -      +
    254B  SER*     1.3    63.8    +      -       -      +
    255B  VAL      3.1     2.1    +      -       -      +
    258B  PHE*     5.9     1.3    -      -       -      -
    259B  LYS*     3.3    32.8    -      -       -      +
    266B  ARG*     4.0    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 254 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250B  SER*     3.0    17.4    +      -       -      -
    251B  PHE*     3.6    15.4    +      -       -      -
    253B  GLU*     1.3    78.2    +      -       -      +
    255B  VAL*     1.3    62.0    +      -       -      +
    256B  PRO*     3.1    14.0    -      -       -      +
    259B  LYS*     4.5     7.8    -      -       -      +
    329B  GLY*     4.8     8.7    +      -       -      +
----------------------------------------------------------
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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