Contacts of the helix formed by residues 510 - 536 (chain B) in PDB entry 5NC5


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 LYS 510 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    508B  GLY      4.0    17.5    -      -       -      +
    509B  LYS*     1.3    80.6    -      -       -      +
    511B  GLY*     1.3    72.7    +      -       -      +
    512B  PHE      3.5     0.5    +      -       -      -
    513B  PHE*     3.7     3.6    +      -       -      +
    514B  GLY      3.6     5.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 511 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    510B  LYS*     1.3    81.2    -      -       -      +
    512B  PHE*     1.3    64.3    +      -       -      -
    513B  PHE      3.2     0.5    +      -       -      -
    514B  GLY*     3.9     0.2    -      -       -      -
    515B  TRP*     3.2    18.9    +      -       -      +
    518B  ARG*     5.5     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 512 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357B  LEU*     3.9    24.7    -      -       +      -
    510B  LYS      3.5     0.4    +      -       -      -
    511B  GLY*     1.3    70.8    -      -       -      -
    513B  PHE*     1.3    76.7    +      +       +      +
    515B  TRP*     3.2    32.3    +      +       +      +
    516B  PHE*     2.7    45.5    +      +       +      +
     16H  PRO*     6.3     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 513 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356B  TYR*     3.8    39.7    -      +       -      -
    357B  LEU*     4.5    13.5    -      -       +      -
    360B  GLN*     3.4    50.9    -      -       +      +
    509B  LYS*     4.1    11.9    -      -       +      -
    510B  LYS      3.7     4.1    +      -       -      +
    511B  GLY      3.2     1.0    +      -       -      -
    512B  PHE*     1.3   100.0    -      +       +      +
    514B  GLY*     1.3    62.3    +      -       -      +
    516B  PHE*     3.5     3.0    -      -       +      +
    517B  ASN*     2.7    38.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 514 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    506B  GLY      3.7    15.5    -      -       -      -
    507B  GLU      4.1     0.4    -      -       -      +
    509B  LYS*     3.4    27.0    -      -       -      +
    510B  LYS      3.6     5.3    +      -       -      -
    511B  GLY      3.4     4.0    +      -       -      -
    513B  PHE*     1.3    78.8    -      -       -      +
    515B  TRP*     1.3    60.6    +      -       -      +
    517B  ASN*     3.2     0.7    +      -       -      +
    518B  ARG*     2.9    38.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 515 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    511B  GLY      3.2    12.4    +      -       -      +
    512B  PHE*     3.2    36.5    +      +       +      +
    513B  PHE      3.2     0.4    -      -       -      -
    514B  GLY*     1.3    75.5    -      -       -      +
    516B  PHE*     1.3    84.1    +      +       -      +
    518B  ARG*     3.5    26.1    -      -       -      +
    519B  MET*     2.8    73.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 516 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357B  LEU*     3.8    52.9    -      -       +      -
    358B  PHE*     4.2    22.2    -      +       -      -
    360B  GLN*     4.3     1.1    -      -       -      +
    512B  PHE*     2.7    42.5    +      +       +      +
    513B  PHE*     3.5     8.3    -      -       +      +
    515B  TRP*     1.3    89.1    -      +       +      +
    517B  ASN*     1.3    68.3    +      -       -      +
    519B  MET*     3.4    13.9    +      -       +      +
    520B  PHE*     2.8    39.5    +      +       +      +
     19H  MET*     4.1    26.2    -      -       +      -
     23H  LEU*     5.4     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 517 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358B  PHE      4.6     3.5    -      -       -      +
    360B  GLN*     3.0    35.7    +      -       -      -
    505B  HIS      3.8    13.6    -      -       -      +
    506B  GLY*     2.8    41.8    +      -       -      +
    507B  GLU*     4.1     2.2    -      -       -      +
    509B  LYS*     4.1     1.2    -      -       -      +
    513B  PHE      2.7    24.5    +      -       -      +
    514B  GLY      3.6     1.1    -      -       -      +
    516B  PHE*     1.3    75.7    -      -       -      +
    518B  ARG*     1.3    61.5    +      -       -      +
    520B  PHE*     3.2     4.0    +      -       -      +
    521B  GLU*     2.9    33.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 518 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    507B  GLU*     3.3    52.6    +      -       +      +
    509B  LYS      4.2     5.7    +      -       -      -
    511B  GLY      5.5     0.4    +      -       -      -
    514B  GLY*     2.9    26.6    +      -       -      +
    515B  TRP*     3.5    34.1    -      -       -      +
    517B  ASN*     1.3    75.2    -      -       -      +
    519B  MET*     1.3    64.3    +      -       -      +
    521B  GLU*     3.9     1.4    -      -       -      +
    522B  LYS*     3.0    36.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 519 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    515B  TRP*     2.8    60.7    +      -       +      +
    516B  PHE*     3.7    16.6    -      -       +      +
    518B  ARG*     1.3    78.0    -      -       -      +
    520B  PHE*     1.3    64.9    +      -       -      +
    522B  LYS*     3.5    13.7    +      -       -      +
    523B  SER*     3.0    36.8    +      -       -      +
     19H  MET*     6.0     0.2    -      -       +      -
     20H  ALA*     6.3     1.1    -      -       -      -
     23H  LEU*     4.1    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 520 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358B  PHE*     4.2    21.8    -      +       -      -
    516B  PHE*     2.8    33.7    +      +       +      +
    517B  ASN*     3.2     5.1    +      -       -      +
    519B  MET*     1.3    76.7    -      -       -      +
    521B  GLU*     1.3    65.7    +      -       +      +
    523B  SER*     3.2     5.1    +      -       -      +
    524B  THR*     2.8    53.4    +      -       +      -
    972B  LEU*     3.9    14.8    -      -       +      -
    973B  ARG*     4.2    32.5    -      -       +      -
    976B  LEU*     3.8    23.8    -      -       +      -
     23H  LEU*     4.2    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 521 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    505B  HIS*     3.7    33.8    +      -       +      +
    507B  GLU*     3.7    39.0    -      -       +      +
    517B  ASN      2.9    16.7    +      -       -      +
    518B  ARG      3.9     0.4    -      -       -      +
    520B  PHE*     1.3    79.8    -      -       +      +
    522B  LYS*     1.3    63.8    +      -       -      +
    524B  THR*     3.3     9.2    +      -       -      -
    525B  HIS*     3.2    40.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 522 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    507B  GLU*     6.1     0.4    -      -       -      +
    518B  ARG*     3.0    27.8    +      -       +      +
    519B  MET*     3.7    12.3    -      -       -      +
    521B  GLU*     1.3    76.7    -      -       -      +
    523B  SER*     1.3    62.4    +      -       -      +
    525B  HIS*     3.0    21.7    +      -       -      +
    526B  HIS*     3.1    12.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 523 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    519B  MET*     3.0    28.1    +      -       -      +
    520B  PHE*     3.2    11.9    +      -       -      -
    522B  LYS*     1.3    76.8    -      -       -      +
    524B  THR*     1.3    61.4    +      -       -      +
    526B  HIS*     3.5     8.8    +      -       -      +
    527B  TYR*     3.1    22.7    +      -       -      +
    972B  LEU*     5.3     1.7    -      -       -      +
     23H  LEU*     4.5    21.5    -      -       -      +
     26H  ILE*     6.1     1.5    -      -       -      +
     27H  TYR*     6.0     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 524 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    520B  PHE*     2.8    42.5    +      -       +      -
    521B  GLU*     3.6     9.2    -      -       -      -
    522B  LYS      3.2     0.2    -      -       -      -
    523B  SER*     1.3    75.6    -      -       -      +
    525B  HIS*     1.4    53.9    +      -       -      +
    527B  TYR*     3.4     4.4    +      -       +      +
    528B  THR*     2.7    36.6    +      -       -      +
    969B  ARG*     4.2    31.9    -      -       +      +
    972B  LEU*     3.8    20.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 525 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    521B  GLU*     3.2    34.3    +      -       +      -
    522B  LYS*     3.0    14.2    +      -       +      +
    524B  THR*     1.4    71.2    -      -       -      +
    526B  HIS*     1.3    68.2    +      -       -      +
    528B  THR*     3.0     8.8    +      -       -      -
    529B  ASP*     2.8    40.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 526 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522B  LYS      3.1     8.9    +      -       -      +
    523B  SER*     3.7    11.0    -      -       -      +
    524B  THR      3.4     0.2    -      -       -      -
    525B  HIS*     1.3    79.7    -      -       -      +
    527B  TYR*     1.3    65.2    +      -       -      +
    529B  ASP*     3.3     8.1    +      -       +      +
    530B  SER*     2.8    23.3    +      -       -      -
     26H  ILE      5.1     0.4    +      -       -      -
     27H  TYR*     3.2    55.7    +      +       +      -
     30H  GLY*     4.0     4.7    -      -       -      -
     31H  GLU*     3.3    30.1    +      -       -      -
     34H  ASN*     3.7    22.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 527 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    523B  SER      3.1    14.0    +      -       -      +
    524B  THR*     3.7     9.6    -      -       +      +
    525B  HIS      3.3     0.2    -      -       -      -
    526B  HIS*     1.3    80.8    +      -       -      +
    528B  THR*     1.3    62.3    +      -       +      +
    530B  SER*     3.0     8.6    +      -       -      -
    531B  VAL*     2.8    43.1    +      -       +      +
    968B  VAL*     2.9    52.2    +      -       +      +
    969B  ARG*     5.0     0.4    -      -       -      -
    972B  LEU*     3.8    26.4    -      -       +      -
   1019B  ILE*     2.9    51.0    +      -       +      +
   1020B  PHE*     3.7    21.8    -      +       +      -
     26H  ILE*     5.2    12.6    -      -       +      +
     30H  GLY*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 528 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    524B  THR*     2.7    20.4    +      -       -      +
    525B  HIS*     3.0    18.4    +      -       -      -
    527B  TYR*     1.3    83.2    -      -       +      +
    529B  ASP*     1.3    55.8    +      -       -      +
    531B  VAL*     3.2     6.6    +      -       -      +
    532B  GLY*     2.7    31.9    +      -       -      -
    965B  LEU*     3.8    24.4    -      -       +      +
    968B  VAL*     4.3     6.5    -      -       +      -
    969B  ARG*     4.2    29.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 529 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    525B  HIS*     2.8    38.4    +      -       -      +
    526B  HIS*     3.6     6.3    -      -       -      +
    528B  THR*     1.3    72.2    +      -       -      +
    530B  SER*     1.3    64.2    +      -       -      +
    532B  GLY*     3.2     2.9    +      -       -      -
    533B  GLY*     3.0    18.7    +      -       -      -
    536B  ARG*     5.0     2.9    +      -       -      -
     34H  ASN*     4.5     3.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 530 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    526B  HIS*     2.8    15.8    +      -       -      -
    527B  TYR*     3.3     9.0    -      -       -      -
    529B  ASP*     1.3    78.7    -      -       -      +
    531B  VAL*     1.3    56.6    +      -       -      +
    533B  GLY*     3.2     3.1    +      -       -      -
    534B  ILE*     2.9    30.2    +      -       -      +
   1020B  PHE*     4.2     7.4    -      -       -      -
     30H  GLY*     2.9    39.7    +      -       -      -
     33H  PHE*     4.0     8.5    -      -       -      +
     34H  ASN*     3.5    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 531 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    527B  TYR*     2.8    55.5    +      -       +      +
    528B  THR*     3.5     8.3    -      -       -      +
    530B  SER*     1.3    71.6    -      -       -      +
    532B  GLY*     1.3    61.8    +      -       -      +
    534B  ILE*     3.2     9.4    +      -       +      +
    535B  LEU*     2.9    35.1    +      -       +      +
    964B  THR*     5.2     0.2    -      -       +      -
    965B  LEU*     3.4    21.5    -      -       +      -
    968B  VAL*     4.4     5.4    -      -       +      -
   1019B  ILE      4.2     4.7    -      -       -      +
   1020B  PHE*     4.0    13.9    -      -       +      +
   1023B  PRO*     4.2    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 532 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    528B  THR      2.7    18.2    +      -       -      -
    529B  ASP*     3.2     4.7    +      -       -      -
    531B  VAL*     1.3    73.5    -      -       -      +
    533B  GLY*     1.3    61.2    +      -       -      +
    535B  LEU*     3.3     7.1    +      -       -      +
    536B  ARG*     3.2    33.1    +      -       -      +
    961B  ILE*     5.8     1.2    -      -       -      +
    965B  LEU*     4.0    18.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 533 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    529B  ASP      3.0    12.9    +      -       -      -
    530B  SER*     3.2     3.3    +      -       -      -
    532B  GLY*     1.3    71.7    -      -       -      +
    534B  ILE*     1.3    66.7    +      -       -      +
    536B  ARG*     3.1    35.9    +      -       -      +
    537B  SER*     3.2    13.6    +      -       -      -
    541B  TYR*     5.5     0.4    -      -       -      -
     33H  PHE      5.8     0.9    -      -       -      -
     34H  ASN*     5.2     5.6    -      -       -      -
     37H  SER*     5.1     5.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 534 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    530B  SER      2.9    19.6    +      -       -      +
    531B  VAL*     3.5     9.6    -      -       +      +
    533B  GLY*     1.3    75.4    -      -       -      +
    535B  LEU*     1.3    62.0    +      -       +      +
    537B  SER      3.2    22.5    +      -       -      +
    538B  THR*     3.8     2.6    +      -       -      +
    541B  TYR*     3.5    43.8    -      -       +      +
   1020B  PHE*     3.7    39.5    -      -       +      +
   1024B  VAL*     3.5    30.3    -      -       +      -
     33H  PHE*     3.9    25.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 535 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    531B  VAL*     2.9    35.9    +      -       +      +
    532B  GLY*     3.7     5.8    -      -       -      +
    533B  GLY      3.2     0.4    -      -       -      -
    534B  ILE*     1.3    77.3    -      -       +      +
    536B  ARG*     1.3    61.1    +      -       -      +
    537B  SER      3.2     1.1    +      -       -      -
    538B  THR*     3.5    17.8    -      -       +      +
    961B  ILE*     4.1    31.6    -      -       +      +
    964B  THR*     3.9    17.9    -      -       +      -
    965B  LEU*     4.0    12.6    -      -       +      -
   1023B  PRO*     3.3    33.0    -      -       +      +
   1024B  VAL*     4.0     9.4    -      -       +      +
   1027B  VAL*     3.5    19.7    -      -       +      -
   1031B  ARG*     4.0    11.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 536 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    529B  ASP      5.0     2.6    +      -       -      -
    532B  GLY*     3.2    11.4    +      -       -      +
    533B  GLY*     3.1    43.4    +      -       -      +
    535B  LEU*     1.3    76.8    -      -       -      +
    537B  SER*     1.3    57.0    +      -       -      +
    538B  THR*     4.1     0.7    -      -       -      -
   1031B  ARG*     5.9     2.0    -      -       -      +
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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