Contacts of the helix formed by residues 201 - 224 (chain B) in PDB entry 1BRR


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 LEU 201 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3B  GLN*     3.7    23.1    -      -       +      +
      4B  ILE      5.5     0.2    -      -       -      +
      5B  THR*     3.1    40.6    -      -       -      +
      9B  GLU*     3.3    11.4    -      -       -      +
     77B  PRO*     4.3    13.7    -      -       +      +
     78B  ILE*     5.7     0.2    -      -       -      -
     79B  TYR*     3.7    22.4    -      -       +      -
    193B  SER*     3.5    30.4    -      -       -      +
    194B  GLU*     5.3     4.7    -      -       +      +
    199B  VAL      3.9     0.6    +      -       -      -
    200B  PRO*     1.3    70.8    -      -       -      +
    202B  ASN*     1.3    52.9    +      -       -      +
    204B  GLU*     2.9    25.0    +      -       -      +
    205B  THR*     2.7    43.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 202 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4B  ILE      6.0     0.2    +      -       -      -
      8B  PRO*     4.0    22.1    +      -       +      +
      9B  GLU*     4.0    22.4    +      -       -      +
     12B  TRP*     3.3    29.4    -      -       -      +
    200B  PRO*     2.9    15.5    +      -       +      +
    201B  LEU*     1.3    80.4    -      -       -      +
    203B  ILE*     1.3    61.3    +      -       +      +
    205B  THR*     3.1     4.2    +      -       -      -
    206B  LEU      3.1    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 203 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  TRP*     6.0     2.2    -      -       +      +
    199B  VAL*     3.2    28.3    -      -       +      -
    200B  PRO*     3.0    18.0    +      -       +      -
    202B  ASN*     1.3    80.0    -      -       +      +
    204B  GLU*     1.3    58.9    +      -       -      +
    205B  THR      3.1     0.2    -      -       -      -
    206B  LEU*     3.7    15.7    -      -       +      -
    207B  LEU*     2.9    49.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 204 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79B  TYR*     5.7     0.3    -      -       -      -
     82B  ARG*     4.7     4.3    +      -       -      -
    188B  VAL*     3.9    21.0    -      -       +      +
    189B  TRP*     4.4     4.7    -      -       -      -
    192B  GLY*     3.8    23.3    -      -       -      -
    193B  SER      4.2     4.7    -      -       -      -
    194B  GLU*     3.3    35.2    +      -       -      +
    199B  VAL*     4.1     2.2    -      -       +      +
    200B  PRO      3.0    11.2    +      -       -      +
    201B  LEU*     2.9    31.7    +      -       -      +
    203B  ILE*     1.3    78.2    -      -       -      +
    205B  THR*     1.3    60.4    +      -       -      +
    207B  LEU*     4.2     1.1    -      -       -      -
    208B  PHE*     2.9    59.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 205 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  GLU*     3.5    31.3    -      -       +      +
     12B  TRP*     3.9     8.7    -      -       +      -
     13B  LEU*     3.5    33.4    -      -       +      -
     79B  TYR*     4.2     2.6    -      -       -      -
     82B  ARG*     3.6    18.4    +      -       -      +
    201B  LEU*     2.7    26.6    +      -       -      +
    202B  ASN      3.5     5.4    -      -       -      -
    204B  GLU*     1.3    77.5    -      -       -      +
    206B  LEU*     1.3    59.0    +      -       -      +
    208B  PHE*     3.4     2.8    +      -       -      +
    209B  MET*     2.9    31.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 206 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  TRP*     3.3    64.8    -      -       +      +
    202B  ASN      3.1     9.5    +      -       -      +
    203B  ILE*     3.8    17.5    -      -       +      +
    205B  THR*     1.3    77.1    -      -       -      +
    207B  LEU*     1.3    73.4    +      -       +      +
    209B  MET*     3.2     9.8    +      -       +      +
    210B  VAL*     3.1    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 207 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188B  VAL*     3.8    36.3    -      -       +      -
    191B  ILE*     4.9    14.6    -      -       +      -
    199B  VAL*     5.0     2.2    -      -       +      -
    203B  ILE*     2.9    42.3    +      -       +      +
    204B  GLU*     4.8     0.2    -      -       -      -
    206B  LEU*     1.3    84.6    -      -       +      +
    208B  PHE*     1.3    59.6    +      -       -      +
    210B  VAL*     3.3     4.0    +      -       +      +
    211B  LEU*     2.9    44.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 208 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  TYR*     3.8     2.2    -      -       -      -
     82B  ARG*     3.7    35.2    -      -       -      +
     86B  TRP*     3.9    17.5    -      +       -      -
    185B  TYR*     3.3    47.6    -      +       -      -
    188B  VAL*     4.1    20.6    -      -       +      -
    189B  TRP*     4.1    20.2    -      +       +      -
    194B  GLU*     5.1     3.6    -      -       -      -
    204B  GLU*     2.9    50.5    +      -       +      +
    205B  THR      3.4     1.7    +      -       -      +
    206B  LEU      3.3     0.2    -      -       -      -
    207B  LEU*     1.3    79.1    -      -       -      +
    209B  MET*     1.3    53.6    +      -       -      +
    211B  LEU*     4.0     4.2    -      -       +      +
    212B  ASP*     2.7    41.3    +      -       -      +
    999B  RET      4.9     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 209 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  TRP*     3.5    25.6    -      -       +      +
     15B  LEU*     3.4    46.7    -      -       +      -
     16B  GLY*     3.6    16.2    -      -       -      +
     19B  LEU*     4.7     5.2    -      -       +      -
     57B  TYR*     3.3    19.0    +      -       +      +
    205B  THR*     2.9    19.5    +      -       +      +
    206B  LEU*     3.2    17.2    +      -       +      +
    208B  PHE*     1.3    76.7    -      -       -      +
    210B  VAL*     1.3    67.3    +      -       +      +
    212B  ASP*     4.0     0.8    -      -       -      +
    213B  VAL*     3.1    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 210 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  LEU*     3.1    30.9    +      -       +      +
    207B  LEU*     3.8     4.9    -      -       +      +
    209B  MET*     1.3    85.0    -      -       +      +
    211B  LEU*     1.3    66.9    +      -       +      +
    212B  ASP      3.2     1.3    -      -       -      -
    213B  VAL*     4.3     2.9    -      -       -      +
    214B  SER*     2.7    38.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181B  LEU*     4.1    20.0    -      -       +      +
    184B  ALA*     3.6    28.9    -      -       +      -
    185B  TYR*     3.4    34.1    -      -       +      +
    188B  VAL*     4.2    17.7    -      -       +      -
    207B  LEU*     2.9    36.5    +      -       +      +
    208B  PHE*     4.0     4.3    -      -       +      +
    210B  VAL*     1.3    85.6    -      -       +      +
    212B  ASP*     1.3    58.0    +      -       -      +
    214B  SER*     3.5     5.9    +      -       -      -
    215B  ALA*     2.9    33.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  MET*     3.6    15.0    -      -       +      -
     57B  TYR*     2.7    34.2    +      -       +      +
     82B  ARG*     4.3     6.4    +      -       -      +
     85B  ASP*     5.6     1.1    -      -       -      +
     86B  TRP*     3.6    16.3    +      -       -      -
    185B  TYR*     2.6    26.3    +      -       -      -
    208B  PHE      2.7    21.8    +      -       -      +
    209B  MET      4.1     2.0    -      -       -      +
    211B  LEU*     1.3    72.7    -      -       -      +
    213B  VAL*     1.3    67.6    +      -       -      +
    215B  ALA*     2.8    14.8    +      -       -      +
    216B  LYS*     2.9    22.4    +      -       -      +
    999B  RET      3.4    14.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  GLY*     4.7     6.7    -      -       -      -
     19B  LEU*     3.4    49.1    -      -       +      -
     20B  MET*     3.6    16.8    -      -       +      +
     57B  TYR*     6.2     0.4    -      -       +      -
    209B  MET*     3.1    23.6    +      -       -      +
    210B  VAL*     4.3     3.8    -      -       -      +
    212B  ASP*     1.3    76.6    -      -       -      +
    214B  SER*     1.3    58.8    +      -       -      +
    217B  VAL*     2.8    43.8    +      -       +      -
    218B  GLY      3.1     4.0    +      -       -      -
   1004B  OCT      4.7    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177B  VAL*     4.5     3.6    -      -       -      +
    181B  LEU*     3.3    28.0    -      -       -      +
    210B  VAL*     2.7    25.4    +      -       -      +
    211B  LEU*     3.5     4.7    +      -       -      -
    212B  ASP      3.2     0.2    -      -       -      -
    213B  VAL*     1.3    76.2    -      -       -      +
    215B  ALA*     1.3    57.0    +      -       -      +
    216B  LYS      3.1     4.9    -      -       -      -
    218B  GLY*     3.3     9.9    -      -       -      +
    219B  PHE*     3.1    21.8    +      -       -      +
   1004B  OCT      6.3     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  LEU*     4.0    11.6    -      -       -      +
    177B  VAL*     5.4     0.9    -      -       -      -
    178B  THR*     5.9     1.0    -      -       +      +
    181B  LEU*     3.6    21.5    -      -       +      -
    182B  TRP*     4.9     6.7    +      -       +      +
    185B  TYR*     4.2     9.9    -      -       -      +
    211B  LEU      2.9    20.3    +      -       -      +
    212B  ASP*     2.8     8.4    +      -       -      +
    214B  SER*     1.3    72.6    +      -       -      +
    216B  LYS*     1.3    61.3    +      -       -      +
    219B  PHE*     3.1    22.9    -      -       -      +
    999B  RET      4.4    17.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  MET*     3.3    32.5    -      -       +      -
     27B  PHE*     4.7     0.7    -      -       -      -
     46B  THR*     5.4     0.7    -      -       -      +
     49B  VAL*     3.4    26.5    -      -       +      +
     50B  PRO*     4.7     8.7    -      -       +      +
     53B  ALA*     4.0     7.9    -      -       +      -
     85B  ASP*     4.0     8.4    +      -       -      -
     86B  TRP*     4.3     3.0    -      -       -      -
     89B  THR*     3.2    21.3    -      -       -      +
     93B  LEU*     4.4     0.9    -      -       +      -
    212B  ASP*     2.9    19.8    +      -       -      +
    213B  VAL      4.0     0.4    -      -       -      +
    214B  SER      3.1     0.8    -      -       -      -
    215B  ALA*     1.3    79.5    -      -       -      +
    217B  VAL*     1.3    58.9    +      -       -      +
    218B  GLY      3.0     0.4    +      -       -      -
    219B  PHE*     3.1     2.3    +      -       -      +
    220B  GLY*     2.7    34.8    +      -       -      -
    999B  RET      1.3    73.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  LEU*     4.2    17.9    -      -       +      +
     20B  MET*     4.4    19.5    -      -       -      -
     23B  GLY*     4.0    23.6    -      -       -      -
     26B  TYR*     6.5     0.4    -      -       +      -
     27B  PHE*     3.6    17.0    -      -       +      -
     50B  PRO*     4.8     5.6    -      -       +      +
    213B  VAL*     2.8    29.4    +      -       +      +
    216B  LYS*     1.3    74.8    -      -       -      +
    218B  GLY*     1.3    63.4    +      -       -      +
    220B  GLY      3.3     0.2    +      -       -      -
    221B  LEU*     2.9    34.5    +      -       +      +
   1004B  OCT      4.6    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177B  VAL*     5.9     0.7    -      -       -      -
    213B  VAL      3.1     8.9    +      -       -      -
    214B  SER*     3.3    15.7    -      -       -      +
    216B  LYS      3.0     0.6    -      -       -      -
    217B  VAL*     1.3    76.8    -      -       -      +
    219B  PHE*     1.3    54.4    +      -       -      +
    221B  LEU*     2.8    30.3    +      -       -      +
    222B  ILE*     3.2    17.5    +      -       -      +
   1004B  OCT      5.3     7.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  THR*     5.2     2.0    -      -       +      -
     93B  LEU*     3.9    34.5    -      -       +      -
     96B  ASP*     3.6    24.5    -      -       +      -
     97B  LEU*     3.2    33.9    -      -       +      -
    174B  LEU*     3.6    29.3    -      -       +      +
    177B  VAL*     5.1     7.4    -      -       +      +
    178B  THR*     3.5    34.3    -      -       +      -
    214B  SER      3.1     8.2    +      -       -      +
    215B  ALA*     3.1    26.0    -      -       -      +
    216B  LYS      3.1     1.7    +      -       -      +
    218B  GLY*     1.3    74.5    -      -       -      +
    220B  GLY*     1.3    66.9    +      -       -      +
    222B  ILE*     3.4     6.6    +      -       -      -
    223B  LEU*     3.2    24.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  PHE*     3.7     9.6    -      -       -      -
     46B  THR*     3.5    27.8    -      -       -      -
    216B  LYS      2.7    20.4    +      -       -      -
    217B  VAL      3.7     1.8    -      -       -      -
    219B  PHE*     1.3    76.5    -      -       -      +
    221B  LEU*     1.3    56.0    +      -       -      +
    223B  LEU*     4.6     1.1    -      -       -      -
    224B  LEU*     2.9    35.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  TYR*     3.8    19.5    -      -       +      +
     27B  PHE*     3.4    24.5    -      -       +      -
     30B  LYS*     5.3     1.6    -      -       -      +
    217B  VAL*     2.9    29.0    +      -       +      +
    218B  GLY*     2.8    17.0    +      -       -      +
    220B  GLY*     1.3    68.2    -      -       -      +
    222B  ILE*     1.3    65.3    +      -       +      +
    224B  LEU*     5.3     0.4    -      -       -      -
    225B  ARG*     3.3    47.6    +      -       +      +
   1004B  OCT      5.0    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170B  THR*     4.5     6.4    -      -       +      +
    173B  VAL*     3.6    29.8    -      -       +      -
    174B  LEU*     3.6    29.6    -      -       +      -
    177B  VAL*     3.7    32.1    -      -       +      -
    218B  GLY      3.2    14.1    +      -       -      +
    219B  PHE*     3.7     3.8    -      -       -      +
    220B  GLY      3.4     0.2    -      -       -      -
    221B  LEU*     1.3    77.6    -      -       +      +
    223B  LEU*     1.3    63.3    +      -       -      +
    225B  ARG*     4.4     1.6    -      -       -      +
    226B  SER*     3.7    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  PHE*     4.2    18.4    -      -       +      -
     46B  THR*     3.6     9.4    -      -       -      +
     96B  ASP*     3.1    42.2    -      -       +      +
     97B  LEU*     5.8     0.2    -      -       +      -
    100B  LEU*     3.9    22.9    -      -       +      -
    170B  THR*     4.4     5.4    -      -       +      -
    174B  LEU*     3.6    26.4    -      -       +      +
    219B  PHE*     3.2    19.7    +      -       +      +
    220B  GLY*     3.8     3.8    -      -       -      +
    222B  ILE*     1.3    76.5    -      -       -      +
    224B  LEU*     1.3    64.5    +      -       +      +
    225B  ARG      3.2     4.0    -      -       -      -
    226B  SER*     2.9    24.6    +      -       -      +
    228B  ALA*     4.7    11.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  PHE*     3.8    34.8    -      -       +      -
     30B  LYS*     3.1    26.0    +      -       -      +
     42B  PHE*     3.9    28.0    -      -       +      +
     43B  TYR*     3.7    49.7    +      -       +      -
     46B  THR*     3.6    28.5    -      -       +      +
    220B  GLY      2.9    19.3    +      -       -      +
    221B  LEU*     4.9     0.7    -      -       -      +
    223B  LEU*     1.3    73.4    -      -       +      +
    225B  ARG*     1.3    57.8    +      -       -      +
    226B  SER      3.4     4.5    -      -       -      +
    228B  ALA*     6.0     1.3    -      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il