Contacts of the helix formed by residues 206 - 234 (chain A) in PDB entry 2RIB


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 SER 206 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  LEU*     1.3    64.5    +      -       -      +
    208A  ARG*     3.2     4.5    -      -       -      +
    209A  GLN*     3.1    22.6    +      -       -      +
    210A  GLN*     3.0    43.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 207 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206A  SER*     1.3    81.6    +      -       -      +
    208A  ARG*     1.3    62.8    +      -       -      +
    210A  GLN*     3.3    19.5    +      -       -      +
    211A  VAL*     3.1    27.8    +      -       -      +
    204B  VAL      5.0     3.8    -      -       -      +
    207B  LEU*     4.1     9.4    -      -       +      -
    208B  ARG*     3.9    38.6    -      -       +      +
    211B  VAL*     3.9    27.6    -      -       +      -
    207C  LEU*     3.6    25.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 208 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206A  SER*     3.2     2.1    -      -       -      +
    207A  LEU*     1.3    78.4    -      -       -      +
    209A  GLN*     1.3    64.5    +      -       +      +
    211A  VAL*     3.4     2.9    +      -       -      +
    212A  GLU*     3.0    29.5    +      -       +      +
    206C  SER*     2.8    29.5    +      -       -      -
    207C  LEU*     3.6    30.7    -      -       +      +
    210C  GLN*     3.0    47.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 209 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206A  SER*     3.1    24.2    +      -       -      +
    208A  ARG*     1.3    81.3    -      -       +      +
    210A  GLN*     1.3    59.5    +      -       +      +
    212A  GLU*     3.2    13.6    +      -       -      +
    213A  ALA*     2.8    29.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 210 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206A  SER*     3.0    34.8    +      -       -      +
    207A  LEU*     3.6    23.0    -      -       -      +
    209A  GLN*     1.3    72.7    -      -       +      +
    211A  VAL*     1.3    56.7    +      -       -      +
    213A  ALA*     3.1     5.8    +      -       -      +
    214A  LEU*     2.6    39.4    +      -       -      +
    211B  VAL*     4.2    11.6    -      -       +      +
    215B  GLN*     3.1    28.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 211 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  LEU      3.1    16.7    +      -       -      +
    208A  ARG      3.6     7.4    -      -       -      +
    210A  GLN*     1.3    75.4    -      -       -      +
    212A  GLU*     1.3    58.5    +      -       -      +
    214A  LEU*     4.1     5.0    -      -       -      +
    215A  GLN*     3.0    33.9    +      -       +      +
    211B  VAL*     3.8    27.4    -      -       +      -
    214B  LEU*     6.4     0.2    -      -       +      -
    207C  LEU*     3.8    17.9    -      -       +      -
    210C  GLN*     4.2    36.1    -      -       +      +
    211C  VAL*     3.8     7.9    -      -       +      -
    214C  LEU*     4.2    14.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 212 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  ARG*     3.0    15.5    +      -       -      +
    209A  GLN*     3.3    18.2    -      -       -      +
    211A  VAL*     1.3    78.1    -      -       -      +
    213A  ALA*     1.3    60.4    +      -       -      +
    215A  GLN*     3.5    12.4    +      -       -      +
    216A  GLY*     3.2    17.7    +      -       -      -
    210C  GLN*     5.5     4.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 213 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209A  GLN      2.8    15.9    +      -       -      +
    210A  GLN*     3.5     7.4    -      -       -      +
    212A  GLU*     1.3    75.2    -      -       -      +
    214A  LEU*     1.3    64.6    +      -       -      +
    216A  GLY*     3.1    11.6    +      -       -      -
    217A  GLN*     3.1    19.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 214 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  GLN      2.6    21.9    +      -       -      +
    211A  VAL*     4.1     0.9    -      -       -      +
    213A  ALA*     1.3    73.9    -      -       -      +
    215A  GLN*     1.3    58.1    +      -       -      +
    217A  GLN*     3.4    21.0    +      -       -      +
    218A  VAL*     2.9    33.9    +      -       +      +
    211B  VAL*     4.2     7.2    -      -       +      +
    214B  LEU*     3.6    32.8    -      -       +      +
    215B  GLN*     3.7    31.2    -      -       +      +
    218B  VAL*     3.9    29.2    -      -       +      -
    214C  LEU*     3.9    16.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 215 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  VAL*     3.0    23.2    +      -       +      +
    212A  GLU*     3.8    15.0    -      -       -      +
    214A  LEU*     1.3    74.1    -      -       -      +
    216A  GLY*     1.3    61.3    +      -       -      +
    218A  VAL*     3.8     0.4    -      -       -      +
    219A  GLN*     2.9    50.6    +      -       -      +
    210C  GLN*     4.8     4.6    +      -       -      +
    213C  ALA*     4.7     9.1    -      -       -      +
    214C  LEU*     3.8    29.4    -      -       +      +
    217C  GLN*     3.4    23.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 216 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212A  GLU      3.2    10.5    +      -       -      -
    213A  ALA*     3.1     8.9    +      -       -      -
    215A  GLN*     1.3    77.8    -      -       -      +
    217A  GLN*     1.3    56.0    +      -       -      +
    219A  GLN*     3.4     6.6    +      -       -      +
    220A  HIS*     2.9    44.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 217 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213A  ALA*     3.1    14.0    +      -       -      +
    214A  LEU*     3.6    28.5    -      -       +      +
    215A  GLN      3.3     0.2    -      -       -      -
    216A  GLY*     1.3    78.1    -      -       -      +
    218A  VAL*     1.3    56.7    +      -       -      +
    220A  HIS*     3.3    11.1    +      -       -      +
    221A  LEU*     2.8    28.6    +      -       -      +
    218B  VAL*     4.9     3.2    -      -       +      +
    222B  GLN*     3.6    33.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 218 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  LEU*     2.9    23.0    +      -       +      +
    215A  GLN      3.8     3.8    -      -       -      +
    216A  GLY      3.3     0.2    -      -       -      -
    217A  GLN*     1.3    76.0    -      -       -      +
    219A  GLN*     1.3    60.9    +      -       -      +
    221A  LEU*     3.1     9.5    +      -       +      +
    222A  GLN*     2.8    32.6    +      -       -      +
    218B  VAL*     3.6    31.6    -      -       +      -
    214C  LEU*     3.8    17.7    -      -       +      -
    217C  GLN*     4.1    31.0    -      -       +      +
    218C  VAL*     4.0     7.6    -      -       +      -
    221C  LEU*     4.2    13.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 219 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215A  GLN*     2.9    42.7    +      -       +      +
    216A  GLY*     4.0     5.1    -      -       -      +
    218A  VAL*     1.3    74.8    -      -       -      +
    220A  HIS*     1.3    68.7    +      -       +      +
    222A  GLN*     3.6    13.6    -      -       -      +
    223A  ALA*     3.0    22.5    +      -       -      +
    217C  GLN*     3.4    28.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 220 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216A  GLY*     2.9    31.5    +      -       -      +
    217A  GLN*     3.6     9.0    -      -       -      +
    219A  GLN*     1.3    79.9    -      -       +      +
    221A  LEU*     1.3    58.4    +      -       -      +
    223A  ALA*     3.2     8.5    +      -       +      +
    224A  ALA*     3.0    28.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 221 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217A  GLN      2.8    17.0    +      -       -      +
    218A  VAL*     3.3     8.5    -      -       +      +
    220A  HIS*     1.3    78.5    -      -       -      +
    222A  GLN*     1.3    55.7    +      -       -      +
    224A  ALA*     3.3     4.1    +      -       +      +
    225A  PHE*     2.8    33.8    +      -       +      +
    218B  VAL*     4.7     8.5    -      -       +      +
    221B  LEU*     3.8    27.4    -      -       +      -
    222B  GLN*     4.3    25.4    -      -       +      +
    225B  PHE*     3.8    35.4    -      -       +      -
    221C  LEU*     3.8    24.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 222 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  VAL*     2.8    20.4    +      -       -      +
    219A  GLN*     3.6    14.4    +      -       -      +
    220A  HIS      3.2     0.2    -      -       -      -
    221A  LEU*     1.3    77.4    -      -       -      +
    223A  ALA*     1.3    56.9    +      -       -      +
    225A  PHE*     3.8     5.9    -      -       -      +
    226A  SER*     2.9    31.5    +      -       -      -
    217C  GLN*     3.3    51.5    -      -       -      +
    221C  LEU*     3.9    22.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 223 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  GLN      3.0    13.5    +      -       -      +
    220A  HIS*     3.5    12.3    -      -       +      +
    222A  GLN*     1.3    74.0    -      -       -      +
    224A  ALA*     1.3    65.8    +      -       -      +
    226A  SER*     3.4     6.0    +      -       -      -
    227A  GLN*     3.1    22.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 224 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  HIS      3.0    15.7    +      -       -      +
    221A  LEU*     3.8     5.6    -      -       +      +
    223A  ALA*     1.3    77.0    -      -       -      +
    225A  PHE*     1.3    63.6    +      -       -      +
    227A  GLN*     3.2    11.6    +      -       -      +
    228A  TYR*     3.0    32.1    +      -       +      -
    225B  PHE*     3.7    22.9    -      -       +      -
    229B  LYS*     5.6     2.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 225 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  LEU*     2.8    20.6    +      -       +      +
    222A  GLN      3.8     4.7    -      -       -      +
    224A  ALA*     1.3    77.6    -      -       -      +
    226A  SER*     1.3    59.9    +      -       -      +
    228A  TYR*     3.3     1.8    +      -       +      -
    229A  LYS*     2.9    52.1    +      -       +      +
    225B  PHE*     3.8    26.2    -      +       +      -
    221C  LEU*     4.0    22.4    -      -       +      -
    224C  ALA*     3.6    42.2    -      -       +      -
    225C  PHE*     3.9    17.5    -      +       +      -
    228C  TYR*     3.7    35.7    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 226 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222A  GLN      2.9    18.8    +      -       -      -
    223A  ALA*     3.7     6.3    -      -       -      -
    224A  ALA      3.3     0.2    -      -       -      -
    225A  PHE*     1.3    80.5    -      -       -      +
    227A  GLN*     1.3    62.7    +      -       -      +
    229A  LYS*     3.4     8.7    +      -       -      +
    230A  LYS*     3.3    29.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 227 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223A  ALA      3.1    12.8    +      -       -      +
    224A  ALA*     3.5    11.0    -      -       -      +
    225A  PHE      3.2     0.2    -      -       -      -
    226A  SER*     1.3    74.5    -      -       -      +
    228A  TYR*     1.3    73.6    +      -       -      +
    230A  LYS*     3.2    15.4    +      -       -      +
    231A  VAL*     3.1    20.8    +      -       -      +
    242B  GLU*     2.9    27.7    +      -       -      +
    244B  ILE*     3.5    27.6    -      -       +      +
    355B  PHE*     3.1    37.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 228 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224A  ALA*     3.0    28.3    +      -       +      +
    225A  PHE*     3.9     3.4    -      -       +      +
    227A  GLN*     1.3    84.9    -      -       -      +
    229A  LYS*     1.3    57.3    +      -       -      +
    231A  VAL*     3.7     3.6    -      -       -      -
    232A  GLU*     2.8    11.4    +      -       -      +
    225B  PHE*     3.7    20.9    -      +       +      -
    229B  LYS*     3.5    57.0    -      -       +      +
    232B  GLU*     2.6    51.1    -      -       -      +
    233B  LEU*     3.6    27.2    -      -       +      +
    239B  SER*     4.0     9.7    +      -       -      -
    244B  ILE*     3.4    25.9    -      -       +      +
    228C  TYR*     4.8     3.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 229 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225A  PHE*     2.9    45.2    +      -       +      +
    226A  SER*     3.6     9.4    -      -       -      +
    227A  GLN      3.1     0.2    -      -       -      -
    228A  TYR*     1.3    75.4    -      -       -      +
    230A  LYS*     1.3    66.1    +      -       +      +
    232A  GLU*     3.2     7.5    +      -       +      +
    233A  LEU*     3.1    38.5    +      -       +      +
    239A  SER*     5.4     4.6    -      -       -      -
    244A  ILE*     3.9    24.7    -      -       +      +
    224C  ALA*     5.0     8.4    +      -       -      +
    227C  GLN*     4.3    13.1    +      -       -      -
    228C  TYR*     4.8    11.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 230 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226A  SER*     3.3    18.8    +      -       -      +
    227A  GLN*     3.2    13.1    +      -       -      +
    229A  LYS*     1.3    77.8    -      -       +      +
    231A  VAL*     1.3    61.6    +      -       -      +
    233A  LEU*     3.4     8.4    +      -       -      +
    234A  PHE*     3.3    21.5    +      -       -      +
    264B  ALA*     4.1    15.3    -      -       -      +
    265B  GLY*     2.8    32.6    +      -       -      +
    355B  PHE*     4.0    30.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 231 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227A  GLN      3.1    13.3    +      -       -      +
    228A  TYR*     3.5     3.8    -      -       +      +
    230A  LYS*     1.3    77.8    -      -       -      +
    232A  GLU*     1.3    60.4    +      -       -      +
    234A  PHE*     3.3     9.7    +      -       -      +
    232B  GLU*     3.2    19.1    -      -       +      +
    233B  LEU*     4.2    10.5    -      -       +      -
    244B  ILE*     3.7    35.4    -      -       +      -
    246B  LYS*     3.0    43.8    +      -       +      +
    355B  PHE*     3.7    34.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 232 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228A  TYR      2.8    18.6    +      -       -      +
    229A  LYS*     3.4     8.5    -      -       +      +
    231A  VAL*     1.3    78.0    -      -       -      +
    233A  LEU*     1.3    64.6    +      -       +      +
    234A  PHE      3.4     4.3    +      -       -      +
    236A  ASN*     5.3     1.2    +      -       -      +
    237A  GLY      5.1     0.7    +      -       -      -
    246A  LYS*     3.0    35.0    +      -       -      +
    232B  GLU*     3.0    18.9    +      -       -      +
    246B  LYS*     4.2     4.6    +      -       -      +
    228C  TYR*     3.8    14.3    -      -       +      -
    231C  VAL*     3.6    20.1    -      -       +      +
    232C  GLU*     2.3    45.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 233 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229A  LYS*     3.1    29.9    +      -       +      +
    230A  LYS*     3.4     7.2    +      -       -      +
    231A  VAL      3.3     0.2    -      -       -      -
    232A  GLU*     1.3    79.4    -      -       +      +
    234A  PHE*     1.3    58.1    +      -       -      +
    235A  PRO*     3.5     1.4    -      -       -      +
    236A  ASN      3.3     1.6    +      -       -      -
    237A  GLY*     2.8    51.1    +      -       -      +
    238A  GLN*     4.6     0.7    -      -       -      -
    239A  SER*     3.8    36.1    -      -       -      +
    244A  ILE*     3.7    30.5    -      -       +      -
    264B  ALA*     6.1     0.4    -      -       -      -
    231C  VAL*     4.4    12.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 234 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230A  LYS      3.3     7.8    +      -       -      +
    231A  VAL      3.3     5.1    +      -       -      +
    232A  GLU      4.1     1.0    -      -       -      +
    233A  LEU*     1.3    77.9    -      -       -      +
    235A  PRO*     1.3    71.6    -      -       +      +
    236A  ASN      3.6     1.1    -      -       -      -
    246B  LYS*     2.6    64.6    +      -       +      -
    248B  ALA*     3.7    32.1    -      -       +      -
    260B  LEU*     4.0    23.8    -      -       +      -
    264B  ALA*     3.7    21.1    -      -       +      -
    351B  VAL*     4.0     8.5    -      -       +      -
    353B  CYS*     3.2    30.3    -      -       -      -
    355B  PHE*     3.8    24.5    -      +       +      -
----------------------------------------------------------
 Back to top of page


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