Contacts of the helix formed by residues 210 - 237 (chain D) in PDB entry 4BPW


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 PRO 210 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166D  ILE*     5.0     4.7    -      -       +      -
    170D  SER*     4.3    17.7    -      -       -      +
    172D  SER*     4.7     8.1    -      -       -      +
    181D  GLU*     3.9    16.8    -      -       -      +
    182D  SER      4.0     2.9    -      -       -      +
    183D  ILE*     3.9    19.0    -      -       +      -
    184D  TYR*     4.4     1.4    -      -       -      -
    200D  VAL*     4.6     3.6    -      -       +      -
    208D  TYR      3.9     5.8    -      -       -      +
    209D  VAL*     1.3    96.8    -      -       +      +
    211D  LEU*     1.3    63.5    +      -       -      +
    212D  LYS*     4.1     9.9    -      -       +      +
    213D  ASP*     3.6    23.3    -      -       -      +
    214D  ILE*     3.4    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 211 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132D  PHE*     5.0     4.5    -      -       +      -
    137D  LYS*     4.2    28.5    -      -       +      +
    140D  ILE*     4.1    35.9    -      -       +      -
    181D  GLU*     4.6    11.2    +      -       +      +
    182D  SER*     3.8    19.7    +      -       -      +
    184D  TYR*     3.9    22.7    -      -       +      +
    210D  PRO*     1.3    72.7    -      -       -      +
    212D  LYS*     1.3    66.1    +      -       +      +
    213D  ASP      3.2     2.2    -      -       -      -
    214D  ILE*     3.3    30.0    -      -       +      +
    215D  VAL*     3.4    12.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 212 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172D  SER*     4.6    25.8    +      -       -      +
    173D  LEU*     5.3     5.8    -      -       +      +
    181D  GLU*     3.2    29.4    +      -       -      +
    210D  PRO*     3.4     4.7    -      -       +      +
    211D  LEU*     1.3    80.3    -      -       +      +
    213D  ASP*     1.3    67.7    +      -       -      +
    215D  VAL*     4.0    14.8    -      -       -      +
    216D  ALA*     4.9     1.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 213 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170D  SER*     4.9     1.6    +      -       -      -
    172D  SER*     4.0    18.4    +      -       -      -
    194D  LEU*     4.1    23.5    -      -       +      +
    199D  LYS      4.7     8.9    -      -       -      +
    209D  VAL*     3.8    18.6    -      -       +      +
    210D  PRO*     3.6    24.5    +      -       +      +
    211D  LEU      3.2     0.6    -      -       -      -
    212D  LYS*     1.3    85.1    -      -       -      +
    214D  ILE*     1.3    62.2    +      -       -      +
    215D  VAL      3.1     6.1    +      -       -      -
    216D  ALA*     3.5    15.8    +      -       -      +
    217D  ILE*     3.7    12.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 214 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132D  PHE*     5.6     3.8    -      -       +      -
    144D  LEU*     3.9    18.4    -      -       +      -
    151D  PHE*     3.5    39.9    -      -       +      -
    184D  TYR*     3.5    29.4    -      -       +      -
    186D  ILE*     4.2     3.8    -      -       +      -
    209D  VAL*     4.0     1.8    -      -       +      +
    210D  PRO      3.4    11.5    +      -       -      +
    211D  LEU*     3.3    35.7    -      -       +      +
    213D  ASP*     1.3    74.9    -      -       -      +
    215D  VAL*     1.3    69.8    +      -       +      +
    217D  ILE*     3.4    28.0    -      -       +      +
    218D  ILE*     3.6    10.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 215 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129D  ARG*     5.2    15.3    -      -       +      +
    132D  PHE*     3.7    37.2    -      -       +      -
    211D  LEU*     3.4    18.2    -      -       +      +
    212D  LYS*     4.0    12.3    -      -       -      +
    213D  ASP      3.1     0.6    -      -       -      -
    214D  ILE*     1.3    74.6    -      -       +      +
    216D  ALA*     1.3    59.0    +      -       -      +
    217D  ILE      3.0     5.0    +      -       -      -
    218D  ILE*     3.2     6.1    +      -       -      +
    219D  LEU*     2.8    39.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 216 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194D  LEU*     6.6     0.4    -      -       +      -
    212D  LYS      4.9     1.1    +      -       -      +
    213D  ASP*     3.5    10.7    +      -       -      +
    214D  ILE      3.5     0.6    -      -       -      -
    215D  VAL*     1.3    79.8    -      -       -      +
    217D  ILE*     1.3    57.4    +      -       -      +
    219D  LEU*     3.7    16.4    -      -       +      +
    220D  ASN*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 217 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149D  LEU*     3.7    29.4    -      -       +      -
    151D  PHE*     4.4     7.2    -      -       +      -
    186D  ILE*     3.8    27.8    -      -       +      -
    190D  ASP*     4.0    20.2    -      -       +      +
    191D  ALA*     5.0     4.7    -      -       -      -
    194D  LEU*     4.8     9.6    -      -       +      -
    209D  VAL*     4.4    11.4    -      -       +      -
    213D  ASP      3.7    12.6    -      -       -      +
    214D  ILE*     3.4    21.5    -      -       +      +
    215D  VAL      3.0     0.4    -      -       -      -
    216D  ALA*     1.3    78.2    -      -       +      +
    218D  ILE*     1.3    58.9    +      -       -      +
    220D  ASN*     3.1     6.1    +      -       -      +
    221D  GLU*     2.8    26.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 218 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128D  LEU*     5.2     5.4    -      -       +      -
    132D  PHE*     6.3     0.7    -      -       +      -
    143D  PHE*     4.3    33.2    -      -       +      -
    144D  LEU*     3.6    32.1    -      -       +      -
    147D  SER*     3.9    28.0    -      -       -      +
    151D  PHE*     4.0    14.1    -      -       +      -
    214D  ILE      3.6     9.1    +      -       -      +
    215D  VAL*     3.2     6.5    +      -       -      +
    217D  ILE*     1.3    72.9    -      -       -      +
    219D  LEU*     1.3    58.1    +      -       -      +
    221D  GLU*     4.0    15.5    -      -       -      +
    222D  PHE*     2.7    38.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 219 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125D  MET*     3.8    54.9    -      -       +      +
    128D  LEU*     4.9    11.0    -      -       +      -
    129D  ARG*     4.1    44.2    -      -       +      +
    215D  VAL*     2.8    24.2    +      -       +      +
    216D  ALA*     3.7    15.0    -      -       +      +
    218D  ILE*     1.3    77.1    -      -       -      +
    220D  ASN*     1.3    57.1    +      -       -      +
    222D  PHE*     4.1     4.1    -      -       +      +
    223D  ARG*     3.4    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 220 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193D  ASP*     3.3    24.4    +      -       -      +
    216D  ALA      2.9    17.8    +      -       -      +
    217D  ILE*     3.5     3.8    -      -       -      +
    219D  LEU*     1.3    77.1    -      -       -      +
    221D  GLU*     1.3    59.6    +      -       -      +
    222D  PHE      3.2     1.3    -      -       -      -
    223D  ARG*     2.6    41.3    +      -       -      +
    224D  ALA*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 221 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147D  SER*     3.1    33.4    +      -       -      +
    148D  GLN      4.8     0.5    -      -       -      -
    149D  LEU*     3.4    43.4    +      -       +      +
    217D  ILE*     2.8    15.6    +      -       +      +
    218D  ILE*     3.2    12.7    +      -       +      +
    220D  ASN*     1.3    77.0    -      -       -      +
    222D  PHE*     1.3    61.5    +      -       -      +
    224D  ALA*     3.8     5.4    -      -       -      +
    225D  LYS*     3.1    47.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 222 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  TYR*     3.5    46.2    -      +       +      -
     30D  LEU*     5.9     6.3    -      -       +      -
    124D  GLU*     4.2    31.9    -      -       +      -
    125D  MET*     4.4    12.1    -      -       +      -
    128D  LEU*     3.6    27.8    -      -       +      -
    218D  ILE*     2.7    25.2    +      -       +      +
    219D  LEU*     4.1     3.1    -      -       +      +
    221D  GLU*     1.3    71.2    -      -       -      +
    223D  ARG*     1.3    63.2    +      -       -      +
    225D  LYS*     3.2     5.7    +      -       +      +
    226D  LEU*     2.8    65.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 223 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121D  ILE*     4.0    18.4    -      -       +      +
    125D  MET*     3.7    29.9    -      -       -      +
    219D  LEU      3.4    16.7    +      -       -      +
    220D  ASN*     2.6    42.3    +      -       -      +
    222D  PHE*     1.3    84.7    -      -       -      +
    224D  ALA*     1.3    59.9    +      -       -      +
    226D  LEU*     3.7     4.2    -      -       -      +
    227D  SER*     2.8    34.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 224 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220D  ASN*     2.9    20.9    +      -       -      +
    221D  GLU*     3.8     6.7    -      -       -      +
    222D  PHE      3.1     0.2    -      -       -      -
    223D  ARG*     1.3    79.6    -      -       -      +
    225D  LYS*     1.3    65.8    +      -       +      +
    227D  SER*     2.7    21.4    +      -       -      -
    228D  LYS*     3.0    25.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 225 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  TYR      6.1     0.9    -      -       -      -
     30D  LEU*     3.6    33.2    -      -       +      +
    107D  ARG*     5.8     0.2    +      -       -      -
    147D  SER      3.9     7.1    +      -       -      -
    148D  GLN*     3.6    23.6    +      -       -      +
    221D  GLU*     3.1    43.5    +      -       +      +
    222D  PHE*     3.9     6.1    -      -       +      +
    224D  ALA*     1.3    80.8    -      -       +      +
    226D  LEU*     1.3    57.3    +      -       -      +
    228D  LYS*     3.9    10.7    -      -       +      +
    229D  ALA*     3.1    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 226 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  TYR      5.4     0.7    -      -       -      +
    103D  HIS*     3.5    30.7    -      -       +      +
    107D  ARG*     4.0    17.7    -      -       -      +
    120D  PHE*     4.5     9.9    -      -       +      -
    121D  ILE*     3.9    35.7    -      -       +      -
    124D  GLU*     4.4     8.7    -      -       +      -
    222D  PHE*     2.8    47.6    +      -       +      +
    223D  ARG*     3.7     4.3    -      -       -      +
    225D  LYS*     1.3    77.1    -      -       -      +
    227D  SER*     1.3    59.9    +      -       -      +
    228D  LYS      3.1     0.2    -      -       -      -
    229D  ALA*     3.1     4.5    +      -       -      +
    230D  LEU*     2.9    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 227 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  ARG*     5.3     3.7    -      -       -      +
    121D  ILE*     3.8    23.1    -      -       -      +
    223D  ARG*     2.8    20.7    +      -       -      +
    224D  ALA*     2.7    24.3    +      -       -      -
    226D  LEU*     1.3    76.6    -      -       -      +
    228D  LYS*     1.3    58.4    +      -       -      +
    230D  LEU*     3.8     6.3    +      -       -      +
    231D  ALA*     3.3    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 228 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224D  ALA*     3.0    27.5    +      -       -      +
    225D  LYS*     3.9     9.6    -      -       +      +
    227D  SER*     1.3    78.9    -      -       -      +
    229D  ALA*     1.3    64.1    +      -       -      +
    230D  LEU      3.3     0.2    -      -       -      -
    231D  ALA*     3.4     6.2    +      -       -      +
    232D  LEU*     3.1    32.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 229 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  LEU      6.0     0.7    -      -       -      +
    107D  ARG*     3.5    33.9    -      -       -      +
    225D  LYS      3.1    18.5    +      -       -      +
    226D  LEU*     3.1     5.3    +      -       -      +
    228D  LYS*     1.3    74.0    -      -       -      +
    230D  LEU*     1.3    55.7    +      -       -      +
    232D  LEU*     3.4     6.9    +      -       -      +
    233D  THR*     2.6    37.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 230 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  ARG*     4.0    44.2    -      -       +      +
    110D  TYR      4.5     0.9    -      -       -      +
    111D  CYS*     3.6    13.0    -      -       +      +
    117D  ARG*     4.0    33.4    -      -       +      -
    120D  PHE*     4.2    20.4    -      -       +      -
    121D  ILE*     3.9    30.3    -      -       +      -
    226D  LEU*     2.9    21.8    +      -       +      +
    227D  SER*     4.0     5.4    -      -       -      +
    228D  LYS      3.3     0.2    -      -       -      -
    229D  ALA*     1.3    74.9    -      -       -      +
    231D  ALA*     1.3    60.4    +      -       -      +
    233D  THR*     3.1     5.6    +      -       -      -
    234D  ALA*     2.9    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 231 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235B  ARG*     5.7     6.5    -      -       -      +
    117D  ARG*     4.9     8.5    -      -       -      +
    227D  SER      3.3    13.3    +      -       -      +
    228D  LYS*     3.6    11.2    -      -       -      +
    229D  ALA      3.3     0.2    -      -       -      -
    230D  LEU*     1.3    78.5    -      -       -      +
    232D  LEU*     1.3    68.0    +      -       +      +
    234D  ALA*     3.3    19.2    +      -       -      +
    235D  ARG*     3.4    22.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 232 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228D  LYS*     3.1    25.3    +      -       +      +
    229D  ALA*     3.7     7.4    -      -       -      +
    231D  ALA*     1.3    75.8    -      -       +      +
    233D  THR*     1.3    65.5    +      -       -      +
    234D  ALA      3.0     1.8    -      -       -      -
    235D  ARG*     3.1    49.6    +      -       +      +
    236D  SER*     3.0    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 233 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  ARG*     4.0    24.3    +      -       +      +
    108D  LEU*     3.8    28.5    -      -       +      -
    111D  CYS*     3.8    16.2    -      -       -      -
    229D  ALA*     2.6    23.5    +      -       -      +
    230D  LEU*     3.1     9.4    +      -       -      -
    232D  LEU*     1.3    77.3    -      -       -      +
    234D  ALA*     1.3    57.9    +      -       -      +
    236D  SER*     3.3     8.1    +      -       -      -
    237D  LEU*     2.9    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 234 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235B  ARG*     5.7     7.9    -      -       +      -
    111D  CYS*     4.0    25.6    -      -       -      +
    112D  GLN*     5.8     0.4    -      -       -      -
    117D  ARG*     4.3    13.0    -      -       -      +
    230D  LEU      2.9    11.3    +      -       -      +
    231D  ALA*     3.4    12.8    -      -       -      +
    232D  LEU      3.0     0.6    -      -       -      -
    233D  THR*     1.3    79.5    -      -       -      +
    235D  ARG*     1.3    56.8    +      -       +      +
    237D  LEU*     3.7     4.0    +      -       -      +
    238D  PRO*     3.0    23.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 235 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235B  ARG*     3.1    44.2    +      -       +      +
    236B  SER*     4.6    10.9    +      -       -      +
    237B  LEU      5.1     4.6    +      -       -      -
    238B  PRO*     6.1     1.6    -      -       -      +
    231D  ALA*     3.4    24.1    +      -       -      +
    232D  LEU*     3.1    39.7    +      -       +      +
    234D  ALA*     1.3    77.4    -      -       +      +
    236D  SER*     1.3    58.6    +      -       -      +
    238D  PRO*     3.2    17.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 236 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108D  LEU*     6.2     1.3    -      -       -      -
    232D  LEU*     3.0    15.6    +      -       -      +
    233D  THR*     3.5    12.9    -      -       -      -
    234D  ALA      3.2     0.2    -      -       -      -
    235D  ARG*     1.3    78.9    -      -       -      +
    237D  LEU*     1.3    63.1    +      -       -      +
    238D  PRO*     3.3     3.0    -      -       -      +
    239D  ALA*     3.8    16.6    +      -       -      +
    240D  VAL*     4.7     3.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 237 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108D  LEU*     3.7    25.1    -      -       +      +
    111D  CYS*     3.8     9.0    -      -       -      -
    112D  GLN*     3.6    32.3    -      -       +      +
    233D  THR      2.9    17.7    +      -       -      +
    234D  ALA*     4.0     4.0    -      -       -      +
    236D  SER*     1.3    72.1    -      -       -      +
    238D  PRO*     1.3    57.0    -      -       +      +
    239D  ALA      2.6    19.9    +      -       -      -
    240D  VAL*     3.3    23.0    +      -       +      -
    241D  GLN*     3.2    46.5    +      -       +      +
    246D  LEU*     5.5     0.2    -      -       +      -
    250D  LEU*     3.9    21.1    -      -       +      -
----------------------------------------------------------
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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