Contacts of the helix formed by residues 393 - 414 (chain D) in PDB entry 1B6C


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 PHE 393 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317D  HIS      4.8     0.2    -      -       -      -
    328D  ALA*     3.4    30.1    -      -       +      -
    329D  ILE      3.6     7.2    -      -       -      -
    330D  ALA*     3.6    27.8    -      -       +      -
    356D  VAL*     3.8    28.3    -      -       +      -
    357D  ARG      4.3     0.7    -      -       -      -
    358D  HIS*     3.6    49.1    +      +       +      +
    365D  ILE*     3.3    21.3    -      -       +      +
    392D  HIS*     1.3    70.1    -      -       -      +
    394D  GLU*     1.3    65.3    +      -       +      +
    396D  PHE*     2.8    28.0    +      +       -      +
    397D  LYS*     3.4    30.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 394 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392D  HIS*     3.2     5.5    +      -       +      +
    393D  PHE*     1.3    78.5    -      -       +      +
    395D  SER*     1.3    62.8    +      -       -      +
    397D  LYS*     2.6    47.6    +      -       -      +
    398D  ARG*     2.9    58.1    +      -       -      +
    484D  THR*     5.6     2.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 395 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382D  GLU*     4.6     3.2    -      -       -      +
    388D  ILE*     3.6    23.5    -      -       -      +
    389D  ASN*     3.1    28.5    +      -       -      +
    392D  HIS*     2.9    19.1    +      -       -      +
    394D  GLU*     1.3    79.7    -      -       -      +
    396D  PHE*     1.3    63.1    +      -       -      +
    398D  ARG*     3.5    15.9    +      -       -      +
    399D  ALA*     3.1    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 396 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330D  ALA*     3.3    21.3    -      -       +      +
    332D  ARG*     3.6    40.4    -      -       +      +
    356D  VAL*     4.0    12.1    -      -       +      -
    365D  ILE*     4.0    15.9    -      -       +      -
    367D  ILE*     4.0    14.4    -      -       +      -
    388D  ILE*     4.7    11.2    -      -       +      -
    389D  ASN      5.1     0.4    -      -       -      -
    390D  MET*     3.8    53.4    -      -       +      -
    392D  HIS      4.0     5.4    -      -       -      -
    393D  PHE*     2.8    21.6    +      +       +      +
    395D  SER*     1.3    76.3    -      -       -      +
    397D  LYS*     1.3    65.1    +      -       -      +
    399D  ALA*     3.2     8.0    +      -       +      +
    400D  ASP*     3.1    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 397 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317D  HIS*     3.5    59.7    +      -       +      +
    328D  ALA*     5.1     0.9    -      -       -      -
    330D  ALA*     5.0     0.2    -      -       -      -
    393D  PHE*     3.4    32.3    +      -       +      +
    394D  GLU*     2.6    43.4    +      -       -      +
    396D  PHE*     1.3    76.6    -      -       -      +
    398D  ARG*     1.3    64.1    +      -       +      +
    400D  ASP*     3.0     6.1    +      -       -      +
    401D  ILE*     3.0    27.3    +      -       +      +
    484D  THR*     5.7     2.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 398 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382D  GLU*     4.9     1.6    -      -       -      +
    394D  GLU*     2.9    48.9    +      -       -      +
    395D  SER*     3.7    13.5    +      -       -      +
    397D  LYS*     1.3    77.0    -      -       +      +
    399D  ALA*     1.3    61.9    +      -       -      +
    401D  ILE*     3.4    12.3    +      -       +      +
    402D  TYR      3.2    13.5    +      -       -      -
    479D  GLY*     3.1    31.4    +      -       -      +
    480D  ALA*     3.6    31.7    +      -       -      +
    482D  ARG*     2.8    27.7    +      -       +      +
    483D  LEU      6.1     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 399 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332D  ARG*     6.5     0.7    -      -       -      -
    378D  TYR      5.0     0.3    -      -       -      +
    380D  ALA*     4.0    27.2    +      -       +      +
    382D  GLU*     4.3     3.6    +      -       -      +
    383D  VAL*     4.5    15.0    -      -       +      -
    388D  ILE*     4.6     2.7    -      -       +      -
    395D  SER      3.1    14.6    +      -       -      +
    396D  PHE*     3.6    11.0    -      -       +      +
    397D  LYS      3.2     0.2    -      -       -      -
    398D  ARG*     1.3    76.4    -      -       -      +
    400D  ASP*     1.3    65.9    +      -       -      +
    402D  TYR*     3.3     6.6    +      -       -      +
    403D  ALA*     3.3    18.0    +      -       -      +
    482D  ARG*     3.9     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 400 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313D  LEU*     4.1     9.6    -      -       +      -
    317D  HIS*     2.7    30.7    +      -       +      +
    330D  ALA*     3.5     4.0    -      -       -      -
    331D  HIS*     2.9    30.2    +      -       -      +
    332D  ARG*     2.9    28.3    +      -       -      -
    333D  ASP      4.6     0.3    +      -       -      -
    334D  LEU*     3.9     8.2    -      -       +      +
    396D  PHE      3.1    13.4    +      -       -      +
    397D  LYS      3.0     8.4    +      -       -      +
    399D  ALA*     1.3    75.6    -      -       -      +
    401D  ILE*     1.3    53.7    +      -       -      +
    403D  ALA*     2.9     9.7    +      -       -      +
    404D  MET*     2.7    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 401 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313D  LEU*     4.2    11.0    -      -       +      -
    317D  HIS*     4.4     3.1    -      -       +      +
    397D  LYS*     3.0    18.9    +      -       +      +
    398D  ARG*     3.5    12.1    -      -       -      +
    399D  ALA      3.3     0.2    -      -       -      -
    400D  ASP*     1.3    75.1    -      -       -      +
    402D  TYR*     1.3    64.1    +      -       -      +
    404D  MET*     3.1     5.6    +      -       -      +
    405D  GLY      2.9    19.4    +      -       -      -
    474D  CYS*     3.4    33.2    -      -       +      +
    482D  ARG*     4.2     7.6    -      -       +      -
    483D  LEU      3.3    24.9    -      -       -      +
    484D  THR*     4.1     1.3    -      -       -      -
    485D  ALA*     3.5    41.1    -      -       +      +
    488D  ILE*     4.4     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 402 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378D  TYR      3.6     9.0    -      -       -      -
    379D  MET      3.3    21.5    +      -       -      -
    380D  ALA*     3.5    16.2    -      -       +      -
    381D  PRO*     3.8    20.9    -      -       +      -
    398D  ARG      3.2     3.2    +      -       -      -
    399D  ALA      3.6     7.4    -      -       -      +
    400D  ASP      3.2     0.4    -      -       -      -
    401D  ILE*     1.3    81.2    -      -       -      +
    403D  ALA*     1.3    62.7    +      -       -      +
    405D  GLY*     3.3     2.6    +      -       -      -
    406D  LEU*     3.3    40.0    +      -       +      +
    428D  TYR*     2.4    38.5    +      -       -      -
    445D  VAL*     3.9     9.9    -      -       +      +
    451D  ARG*     4.2    13.0    -      -       -      -
    474D  CYS      3.4    23.5    +      -       -      +
    475D  TRP*     3.7    24.2    +      +       -      -
    482D  ARG*     4.0    17.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 403 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334D  LEU*     3.9    31.2    -      -       +      +
    378D  TYR*     3.8    21.5    -      -       +      +
    399D  ALA      3.3     7.6    +      -       -      +
    400D  ASP*     2.9    10.3    +      -       -      +
    402D  TYR*     1.3    82.2    -      -       -      +
    404D  MET*     1.3    66.8    +      -       -      +
    406D  LEU*     3.0    17.4    +      -       -      +
    407D  VAL*     3.0    17.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 404 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309D  THR*     3.1    43.3    -      -       +      +
    310D  ALA*     3.1    19.3    -      -       -      +
    313D  LEU*     3.2    31.9    -      -       +      -
    334D  LEU*     4.0    13.4    -      -       +      +
    400D  ASP      2.7    15.8    +      -       -      +
    401D  ILE*     3.1    11.4    +      -       -      +
    403D  ALA*     1.3    71.6    -      -       -      +
    405D  GLY*     1.3    57.7    +      -       -      +
    407D  VAL*     2.9    10.1    +      -       +      +
    408D  PHE*     2.8    61.0    +      -       +      -
    474D  CYS*     5.4     1.8    -      -       -      -
    485D  ALA*     5.3     2.2    -      -       +      -
    488D  ILE*     4.4    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 405 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    401D  ILE      2.9    14.1    +      -       -      -
    402D  TYR      3.6     4.5    -      -       -      -
    403D  ALA      3.1     0.4    -      -       -      -
    404D  MET*     1.3    76.9    -      -       -      +
    406D  LEU*     1.3    61.5    +      -       -      +
    408D  PHE*     3.1    10.6    +      -       -      +
    409D  TRP      3.0    17.3    +      -       -      -
    471D  MET*     4.0     5.2    -      -       -      +
    474D  CYS*     3.8    17.0    -      -       -      -
    475D  TRP*     3.5    20.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 406 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377D  ARG      3.6    20.6    -      -       -      +
    378D  TYR*     3.8    18.8    -      -       +      -
    402D  TYR*     3.3    37.1    +      -       +      +
    403D  ALA*     3.0     6.5    +      -       -      +
    405D  GLY*     1.3    75.1    -      -       -      +
    407D  VAL*     1.3    63.2    +      -       -      +
    409D  TRP*     3.0     6.2    +      -       -      +
    410D  GLU*     3.0    23.9    +      -       -      +
    427D  PRO*     3.6    22.1    -      -       +      +
    428D  TYR*     4.1     8.7    -      -       +      +
    452D  PRO*     3.6    31.2    -      -       +      -
    475D  TRP*     3.4    21.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 407 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  LEU*     3.7    28.9    -      -       +      -
    309D  THR*     4.9     4.0    -      -       +      -
    334D  LEU*     4.8     2.5    -      -       +      -
    335D  LYS*     4.0    29.6    -      -       -      +
    336D  SER*     4.0     6.1    -      -       -      +
    339D  ILE*     3.9    15.5    -      -       +      -
    378D  TYR*     4.0     6.5    -      -       +      -
    403D  ALA      3.0    17.1    +      -       -      +
    404D  MET*     2.9    14.7    +      -       +      +
    406D  LEU*     1.3    77.4    -      -       -      +
    408D  PHE*     1.3    66.9    +      -       +      +
    410D  GLU*     3.0    21.8    +      -       +      +
    411D  ILE*     3.0    18.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 408 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306D  ALA*     3.5    38.4    -      -       +      -
    309D  THR*     4.3     9.6    -      -       +      -
    404D  MET*     2.8    51.0    +      -       +      -
    405D  GLY*     3.1    10.7    +      -       -      +
    407D  VAL*     1.3    77.5    -      -       +      +
    409D  TRP*     1.3    62.8    +      -       -      +
    411D  ILE*     3.4     6.6    +      -       +      +
    412D  ALA*     2.9    26.2    +      -       -      +
    467D  MET*     3.7    26.3    -      -       +      +
    470D  ILE*     3.8    21.5    -      -       +      -
    471D  MET*     4.2    11.4    -      -       +      -
    488D  ILE*     3.6    26.2    -      -       +      -
    492D  LEU*     3.9     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 409 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405D  GLY      3.0     8.8    +      -       -      +
    406D  LEU*     3.0    10.9    +      -       -      +
    408D  PHE*     1.3    78.0    -      -       -      +
    410D  GLU*     1.3    82.7    +      -       +      +
    412D  ALA*     3.9     1.4    -      -       -      +
    413D  ARG*     3.0    60.0    +      -       -      +
    425D  GLN*     3.5    14.6    -      -       +      -
    426D  LEU      3.5    17.3    -      -       -      -
    427D  PRO*     3.7    14.6    -      -       +      -
    428D  TYR      4.9     0.2    -      -       -      -
    429D  TYR*     3.7    28.3    -      +       -      -
    452D  PRO*     3.5    24.8    -      -       +      +
    453D  ASN*     2.8    33.9    +      -       +      -
    458D  TRP*     4.0    10.4    -      +       -      -
    471D  MET*     3.0    37.9    -      -       +      +
    475D  TRP*     3.9     6.5    -      +       +      -
----------------------------------------------------------
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Residues in contact with GLU 410 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292D  LEU*     4.3     8.2    -      -       +      +
    336D  SER*     2.2    25.6    +      -       -      +
    378D  TYR*     2.4    35.4    +      -       -      -
    406D  LEU      3.0    14.9    +      -       -      +
    407D  VAL*     3.0    15.8    +      -       +      +
    409D  TRP*     1.3    82.7    -      -       +      +
    411D  ILE*     1.3    64.1    +      -       -      +
    413D  ARG*     3.5    12.9    -      -       -      +
    414D  ARG*     3.6    13.7    -      -       -      +
    424D  TYR*     2.3    35.9    +      -       +      -
    425D  GLN      3.8    15.0    +      -       -      +
    426D  LEU*     3.8     0.2    -      -       -      +
    427D  PRO*     3.8    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 411 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  LEU*     3.7    32.1    -      -       +      -
    292D  LEU*     4.0    14.4    -      -       +      -
    297D  VAL*     4.0     6.1    -      -       +      +
    302D  MET*     3.7    35.7    -      -       +      +
    305D  LEU*     4.0    26.9    -      -       +      +
    306D  ALA*     4.3    13.9    -      -       +      +
    309D  THR*     5.1     0.9    -      -       -      +
    407D  VAL*     3.0    21.1    +      -       +      +
    408D  PHE*     3.7    11.9    -      -       +      +
    410D  GLU*     1.3    74.4    -      -       -      +
    412D  ALA*     1.3    56.1    +      -       -      +
    414D  ARG*     2.7    31.2    +      -       -      +
    415D  CYS      3.4     3.3    +      -       -      -
    467D  MET*     5.1     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 412 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302D  MET*     3.9    17.7    -      -       -      -
    408D  PHE      2.9    18.5    +      -       -      +
    411D  ILE*     1.3    75.3    -      -       -      +
    413D  ARG*     1.3    62.9    +      -       -      +
    415D  CYS*     2.9    20.0    +      -       -      +
    457D  ARG*     5.3     1.0    +      -       -      -
    458D  TRP*     3.5    37.9    +      -       +      -
    464D  LEU*     4.0    14.6    -      -       +      +
    467D  MET*     4.8     7.0    -      -       +      -
    471D  MET*     4.8     2.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 413 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409D  TRP*     3.0    57.9    +      -       -      +
    410D  GLU      3.5     8.3    -      -       -      +
    412D  ALA*     1.3    76.9    -      -       -      +
    414D  ARG*     1.3    59.3    +      -       +      +
    415D  CYS      3.4     0.8    +      -       -      -
    421D  HIS*     4.1     1.4    -      -       -      +
    422D  GLU*     2.9    62.4    +      -       +      +
    423D  ASP*     2.2    39.8    +      -       -      +
    425D  GLN*     3.5    22.6    -      -       -      +
    429D  TYR*     3.1    25.0    +      -       -      -
    457D  ARG*     5.0     2.7    +      -       -      +
    458D  TRP*     3.7    13.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 414 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292D  LEU*     2.7    55.5    +      -       +      -
    293D  ASN      3.9    10.9    +      -       -      -
    294D  ARG      4.5     1.2    +      -       -      -
    295D  TYR      3.0    25.8    +      -       -      +
    296D  THR*     3.5    25.3    -      -       -      +
    297D  VAL*     2.7    33.0    +      -       +      -
    410D  GLU      3.6    15.5    -      -       -      +
    411D  ILE      2.7    10.9    +      -       -      +
    413D  ARG*     1.3    79.4    -      -       +      +
    415D  CYS*     1.3    62.2    +      -       -      +
    416D  SER      3.2     1.4    +      -       -      -
    421D  HIS*     3.7    11.5    +      -       -      -
    422D  GLU      3.1    26.0    +      -       -      +
    423D  ASP*     4.1     8.9    +      -       -      +
    424D  TYR*     3.8    23.3    -      -       +      +
----------------------------------------------------------
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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