Contacts of the helix formed by residues 5198 - 5221 (chain a) in PDB entry 3A0B


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 HIS5198 (chain a).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5192a  ILE*     2.8    57.9    +      -       +      +
   5193a  LEU*     4.4    12.0    -      -       +      +
   5195a  HIS*     3.9     3.1    +      -       -      +
   5197a  PHE*     1.3    78.6    -      -       -      +
   5199a  GLN*     1.3    65.2    +      -       -      +
   5201a  GLY*     3.0    12.6    +      -       -      -
   5202a  VAL*     3.1    20.2    +      -       +      +
   5286a  ALA*     4.5     6.9    -      -       +      +
   5289a  GLY*     5.0     0.8    -      -       -      -
   5290a  ILE*     5.6     1.3    -      -       -      -
   6003a  CLA      2.5    84.4    +      +       +      +
   6006a  CLA      4.1     6.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN5199 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5195a  HIS      3.3    15.3    +      -       -      +
   5196a  PRO*     3.0    30.0    +      -       +      -
   5198a  HIS*     1.3    79.8    -      -       -      +
   5200a  LEU*     1.3    87.9    +      -       -      +
   5202a  VAL*     2.8     7.1    +      -       -      +
   5203a  ALA*     2.4    33.6    +      -       -      +
   6006a  CLA      3.8    25.7    -      -       -      +
   6057c  DGD      2.9    63.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU5200 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5196a  PRO      3.3    21.8    -      -       -      +
   5197a  PHE*     3.2     4.0    +      -       +      +
   5198a  HIS      3.2     0.8    -      -       -      -
   5199a  GLN*     1.3   101.8    +      -       -      +
   5201a  GLY*     1.3    59.8    +      -       -      +
   5203a  ALA*     3.2    12.8    -      -       +      +
   5204a  GLY      3.1    14.2    +      -       -      -
   5278a  TRP*     6.2     1.1    -      -       +      -
   5281a  VAL*     5.9     2.7    -      -       +      -
   5282a  GLY*     2.8    25.6    -      -       -      -
   5285a  PHE*     3.0    59.0    -      -       +      -
   6056c  DGD      4.0    15.0    -      -       +      -
   6057c  DGD      4.5    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY5201 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5197a  PHE      3.7     3.4    +      -       -      -
   5198a  HIS      3.0     6.8    +      -       -      -
   5200a  LEU*     1.3    74.3    -      -       -      +
   5202a  VAL*     1.3    56.2    +      -       -      +
   5203a  ALA      3.0     0.9    -      -       -      -
   5204a  GLY      3.1     0.3    +      -       -      -
   5205a  VAL*     2.5    39.8    +      -       -      +
   5279a  ARG*     3.6     2.9    +      -       -      -
   5282a  GLY      3.3    16.6    +      -       -      -
   5283a  VAL*     4.5     0.4    -      -       -      -
   5286a  ALA*     3.7     7.0    -      -       -      -
   6003a  CLA      3.5    21.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL5202 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5198a  HIS*     3.1    16.0    +      -       +      +
   5199a  GLN      2.8     7.4    +      -       -      +
   5201a  GLY*     1.3    78.6    -      -       -      +
   5203a  ALA*     1.3    53.4    +      -       -      +
   5205a  VAL*     3.6     7.2    -      -       -      -
   5206a  PHE*     2.5    62.9    +      -       +      +
   6003a  CLA      3.6    32.9    -      -       +      +
   6006a  CLA      2.8    49.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA5203 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5199a  GLN*     2.4    34.3    +      -       -      +
   5200a  LEU*     3.2    21.5    -      -       +      +
   5202a  VAL*     1.3    77.4    -      -       -      +
   5204a  GLY*     1.3    59.7    +      -       -      +
   5207a  GLY      3.4     5.5    +      -       -      -
   5278a  TRP*     3.5    15.4    +      -       +      -
   5282a  GLY*     5.4     0.4    -      -       -      -
   6006a  CLA      2.9    34.1    -      -       -      +
   6057c  DGD      3.8    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY5204 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5200a  LEU      3.1    10.2    +      -       -      -
   5201a  GLY      3.7     0.9    -      -       -      -
   5203a  ALA*     1.3    79.5    -      -       -      +
   5205a  VAL*     1.3    54.2    +      -       -      +
   5207a  GLY      3.3     1.1    -      -       -      -
   5208a  GLY*     2.4    36.4    +      -       -      -
   5278a  TRP*     3.7    29.5    -      -       -      -
   5279a  ARG*     4.0    16.2    -      -       -      +
   5282a  GLY*     4.9     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL5205 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5201a  GLY      2.5    25.0    +      -       -      +
   5202a  VAL*     3.6    11.4    -      -       -      -
   5204a  GLY*     1.3    67.5    -      -       -      -
   5206a  PHE*     1.3    61.8    +      -       -      +
   5207a  GLY      2.8     9.4    +      -       -      -
   5209a  ALA*     3.3    14.2    +      -       -      +
   5279a  ARG*     3.1    21.9    -      -       -      +
   6003a  CLA      3.7    31.2    -      -       +      -
   5204d  VAL*     3.2    45.8    -      -       +      +
   5205d  LEU*     4.0    19.5    -      -       +      -
   5208d  ALA*     3.7     9.3    -      -       +      +
   6004d  CLA      5.3     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE5206 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5202a  VAL*     2.5    33.9    +      -       +      +
   5203a  ALA      3.8     2.9    -      -       -      -
   5205a  VAL*     1.3    79.4    -      -       -      +
   5207a  GLY*     1.3    56.0    +      -       -      +
   5209a  ALA*     4.6     2.2    -      -       -      -
   5210a  LEU*     4.2     7.0    -      -       -      +
   6003a  CLA      3.3    39.9    -      -       +      -
   6006a  CLA      2.8    69.5    -      +       +      +
   6039a  PHO      3.2    29.2    -      -       +      +
   5204d  VAL*     4.1    11.9    -      -       +      -
   6004d  CLA      3.2    47.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with GLY5207 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5203a  ALA      3.4     3.8    +      -       -      -
   5204a  GLY      3.0     6.3    +      -       -      -
   5205a  VAL      2.8     3.4    -      -       -      -
   5206a  PHE*     1.3    80.5    -      -       -      +
   5208a  GLY*     1.3    64.1    +      -       -      -
   5209a  ALA      2.6     5.9    +      -       -      -
   5210a  LEU*     2.9     2.1    +      -       -      -
   5211a  PHE*     2.6    25.4    +      -       -      +
   5278a  TRP*     3.5    25.6    -      -       -      -
   6006a  CLA      4.0     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY5208 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5204a  GLY      2.4    24.7    +      -       -      -
   5207a  GLY*     1.3    65.3    -      -       -      -
   5209a  ALA*     1.3    50.3    +      -       -      +
   5211a  PHE*     4.1     0.4    -      -       -      -
   5212a  CYS*     2.5    38.7    +      -       -      +
   5278a  TRP*     4.0     6.3    -      -       -      -
   5279a  ARG*     5.1     4.5    -      -       -      -
   5207d  GLY      4.0     4.5    -      -       -      -
   5208d  ALA*     4.0     9.9    -      -       -      -
   5211d  CYS*     3.2    27.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA5209 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5205a  VAL      3.3    20.0    +      -       -      +
   5207a  GLY      2.6     4.9    +      -       -      +
   5208a  GLY*     1.3    70.0    -      -       -      +
   5210a  LEU*     1.3    56.7    +      -       -      +
   5211a  PHE      2.6    15.2    +      -       -      -
   5212a  CYS*     3.0    11.1    +      -       -      +
   5213a  ALA*     3.1    12.5    +      -       -      +
   6039a  PHO      3.5    30.7    -      -       +      +
   5204d  VAL*     4.0    22.7    -      -       +      +
   5207d  GLY      4.8     3.4    -      -       -      -
   5208d  ALA*     4.4     1.2    -      -       -      +
   5275d  PRO*     4.2     9.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU5210 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5206a  PHE      4.2     0.4    +      -       -      +
   5207a  GLY*     2.9     7.1    +      -       -      +
   5209a  ALA*     1.3    76.6    -      -       -      +
   5211a  PHE*     1.3    70.0    +      -       +      +
   5213a  ALA*     3.3    14.7    -      -       -      +
   5214a  MET*     3.2    29.0    -      -       +      +
   6006a  CLA      3.2    44.4    -      -       +      -
   6039a  PHO      3.0    84.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE5211 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5207a  GLY      2.6    16.6    +      -       -      +
   5209a  ALA      2.6     3.6    +      -       -      -
   5210a  LEU*     1.3   102.5    -      -       +      +
   5212a  CYS*     1.3    61.9    +      -       -      +
   5213a  ALA      2.8     5.2    -      -       -      -
   5214a  MET*     2.8    16.8    +      -       -      +
   5215a  HIS*     3.2    12.6    +      -       -      +
   5274a  PHE*     3.5    38.4    -      +       -      -
   5275a  LEU*     5.3     6.9    -      -       +      +
   5278a  TRP*     3.5    32.8    -      +       +      -
   6006a  CLA      4.1    14.8    -      -       +      -
   6039a  PHO      6.4     0.2    -      -       -      -
   6043a  PQ9      4.3    37.6    -      -       +      +
   5211d  CYS*     3.5    17.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS5212 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5208a  GLY      2.5    23.3    +      -       -      +
   5209a  ALA      3.0     0.2    +      -       -      -
   5211a  PHE*     1.3    73.3    -      -       -      +
   5213a  ALA*     1.3    60.7    +      -       -      +
   5215a  HIS*     4.8     1.5    -      -       -      +
   5216a  GLY      3.1    16.8    +      -       -      -
   5207d  GLY      3.4    10.1    -      -       -      +
   5210d  LEU*     3.7    18.6    -      -       -      -
   5211d  CYS*     3.6     8.5    -      -       +      -
   5271d  MET*     2.9    66.2    -      -       -      +
   5275d  PRO*     3.9    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA5213 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5209a  ALA      3.1    10.2    +      -       -      +
   5210a  LEU      3.3    15.9    -      -       -      +
   5211a  PHE      2.8     0.4    -      -       -      -
   5212a  CYS*     1.3    80.3    -      -       -      +
   5214a  MET*     1.3    56.3    +      -       -      +
   5217a  SER*     2.8    27.6    +      -       -      -
   6039a  PHO      3.9    29.6    -      -       +      -
   5145d  ALA*     4.4     0.9    -      -       -      +
   5271d  MET      4.0     6.9    +      -       -      -
   5272d  LEU*     3.8     7.2    -      -       -      +
   5275d  PRO*     4.5     1.9    -      -       +      +
   5276d  VAL*     4.1    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET5214 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5210a  LEU*     3.2    35.7    -      -       +      +
   5211a  PHE*     2.8    14.3    +      -       -      +
   5213a  ALA*     1.3    68.9    -      -       -      +
   5215a  HIS*     1.3    59.3    +      -       -      +
   5216a  GLY      2.9     1.3    -      -       -      -
   5217a  SER*     2.4    30.1    +      -       -      -
   5218a  LEU*     2.7    25.2    +      -       +      -
   5255a  PHE*     4.7     4.9    -      -       -      -
   6039a  PHO      3.1    60.1    -      -       +      +
   6043a  PQ9      3.3    43.3    -      -       +      +
   5142d  ASN*     4.6     4.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS5215 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5211a  PHE      3.2     8.0    +      -       -      +
   5212a  CYS      4.8     0.9    -      -       -      +
   5214a  MET*     1.3    78.3    -      -       -      +
   5216a  GLY*     1.3    51.3    +      -       -      +
   5219a  VAL*     2.3    43.3    +      -       +      +
   5246a  TYR*     4.3     4.5    -      +       -      -
   5271a  LEU*     4.6     2.0    -      -       +      -
   5272a  HIS*     2.3    25.4    -      +       -      -
   5275a  LEU*     3.1    32.5    -      -       +      -
   6002a  FE2      2.1    32.9    -      -       -      -
   6043a  PQ9      3.3    29.4    +      -       +      +
   5214d  HIS*     3.2    11.6    +      +       -      -
   5268d  HIS*     2.6    25.4    -      +       -      -
   5271d  MET*     4.6     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY5216 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5212a  CYS      3.1    17.4    +      -       -      -
   5214a  MET      2.7     1.4    +      -       -      -
   5215a  HIS*     1.3    76.8    -      -       -      +
   5217a  SER*     1.3    61.5    +      -       -      +
   5219a  VAL*     2.6    22.0    -      -       -      +
   5220a  THR*     2.9    11.4    +      -       -      -
   5268d  HIS*     2.7    26.5    -      -       -      -
   5271d  MET*     3.9     5.5    -      -       -      +
   5272d  LEU*     4.2     7.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER5217 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5213a  ALA      2.8    23.5    +      -       -      -
   5214a  MET*     2.4    20.3    +      -       -      -
   5216a  GLY*     1.3    70.9    -      -       -      +
   5218a  LEU*     1.3    61.1    +      -       -      +
   5220a  THR      3.2     0.2    +      -       -      -
   5221a  SER*     2.8    29.2    +      -       -      -
   6039a  PHO      5.4     0.4    -      -       -      -
   5141d  TYR*     2.8    17.6    +      -       -      +
   5142d  ASN*     2.8    41.0    +      -       -      +
   5145d  ALA*     4.4     4.7    -      -       -      -
   5272d  LEU*     4.2     7.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU5218 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5214a  MET*     2.7    24.6    +      -       +      +
   5217a  SER*     1.3    83.3    +      -       -      +
   5219a  VAL*     1.3    56.0    +      -       -      +
   5221a  SER*     3.3     6.5    +      -       -      +
   5222a  SER*     3.0    31.4    +      -       -      -
   5251a  ALA*     4.5     8.7    -      -       +      +
   5254a  TYR*     4.1    33.0    -      -       +      -
   5255a  PHE*     3.9    26.0    -      -       +      +
   5258a  LEU*     6.2     0.2    -      -       +      -
   6043a  PQ9      3.5    57.7    -      -       +      -
   5142d  ASN*     4.4     9.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL5219 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5215a  HIS*     2.3    36.9    +      -       +      +
   5216a  GLY      2.6    14.6    -      -       -      +
   5218a  LEU*     1.3    78.2    -      -       -      +
   5220a  THR*     1.3    56.7    +      -       -      +
   5222a  SER      3.1    18.0    -      -       -      +
   5246a  TYR*     3.7    23.5    -      -       +      +
   5251a  ALA*     5.9     0.4    -      -       -      -
   6043a  PQ9      4.7     2.4    -      -       +      +
   5265d  ARG*     3.1    13.3    +      -       -      +
   5268d  HIS*     2.4    91.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR5220 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5216a  GLY      2.9    15.5    +      -       -      -
   5217a  SER*     3.9     0.9    -      -       -      -
   5219a  VAL*     1.3    71.9    -      -       -      +
   5221a  SER*     1.3    54.4    +      -       -      +
   5222a  SER      2.9    10.5    +      -       -      -
   5223a  LEU      3.8     0.5    +      -       -      -
   5234a  ASN*     5.0     0.7    -      -       -      +
   6060b  MGE      4.2     4.5    -      -       -      +
   5139d  ARG*     2.6    32.0    +      -       -      +
   5141d  TYR*     3.2    36.1    -      -       +      -
   5265d  ARG*     2.7    34.4    +      -       -      +
   5268d  HIS*     3.6     6.1    -      -       -      +
   5269d  PHE*     3.6    33.9    -      -       +      +
   5272d  LEU*     5.3     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER5221 (chain a). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5217a  SER      2.8    18.5    +      -       -      -
   5218a  LEU*     3.3    14.1    +      -       -      -
   5220a  THR*     1.3    74.8    -      -       -      +
   5222a  SER*     1.3    56.2    +      -       -      +
   5254a  TYR*     4.1    11.8    -      -       -      -
   5479b  ILE*     4.0     0.2    -      -       -      +
   5138d  VAL*     2.9    27.8    -      -       -      +
   5139d  ARG*     2.6    49.3    +      -       -      +
   5141d  TYR*     3.9    10.0    -      -       -      -
   5142d  ASN      4.7     2.5    -      -       -      -
----------------------------------------------------------
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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