Contacts of the helix formed by residues 5194 - 5219 (chain b) in PDB entry 2AXT


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 ASN5194 (chain b).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5184b  GLU*     3.6    23.0    +      -       -      +
   5188b  ASP*     2.8    34.9    +      -       -      +
   5189b  GLY*     4.8     0.7    -      -       -      -
   5191b  ASN*     2.9    18.4    +      -       +      +
   5192b  PRO      3.5     0.7    -      -       -      +
   5193b  TYR*     1.3    77.8    -      -       -      +
   5195b  PRO*     1.3    55.8    -      -       -      +
   5196b  GLY*     2.6    37.6    +      -       -      -
   5197b  GLY*     2.7    31.9    +      -       -      +
   5198b  VAL*     3.7     3.8    +      -       -      +
   5261b  ALA*     4.3     2.2    -      -       -      -
   5512b  CLA      5.7     0.5    -      -       -      +
   5064h  ALA*     5.6     8.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO5195 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5166b  MET*     4.1    10.3    -      -       +      -
   5167b  TRP      5.5     0.2    -      -       -      +
   5168b  VAL*     4.1    24.5    -      -       +      -
   5181b  VAL*     3.7    27.1    -      -       +      -
   5193b  TYR      3.1    11.9    -      -       -      +
   5194b  ASN*     1.3    84.6    -      -       -      +
   5196b  GLY*     1.3    53.8    +      -       -      +
   5197b  GLY      2.7     0.9    +      -       -      -
   5198b  VAL*     2.5    43.4    +      -       +      +
   5199b  VAL*     3.2     6.2    +      -       -      +
   5261b  ALA*     3.8    15.9    -      -       +      +
   5064h  ALA*     6.0     2.2    -      -       +      -
   5065h  LEU*     6.3     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY5196 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5181b  VAL*     3.5     8.0    -      -       -      +
   5182b  ALA      3.3    23.1    -      -       -      -
   5184b  GLU*     3.2    22.3    +      -       -      -
   5194b  ASN*     2.6    17.9    +      -       -      -
   5195b  PRO*     1.3    73.6    -      -       -      +
   5197b  GLY*     1.3    54.7    +      -       -      -
   5199b  VAL*     3.3     2.3    +      -       -      +
   5200b  ALA*     3.0    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY5197 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5189b  GLY*     3.2    30.9    -      -       -      -
   5194b  ASN*     2.7    15.5    +      -       -      -
   5196b  GLY*     1.3    76.9    -      -       -      +
   5198b  VAL*     1.3    64.1    +      -       -      +
   5199b  VAL      3.1     0.4    -      -       -      -
   5201b  HIS*     3.0    26.7    +      -       -      +
   5512b  CLA      3.6    15.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL5198 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5158b  LEU*     3.6    12.5    -      -       +      +
   5166b  MET*     4.2    12.1    -      -       +      -
   5192b  PRO      5.6     2.5    -      -       -      +
   5194b  ASN      4.4     2.5    -      -       -      +
   5195b  PRO*     2.5    29.5    +      -       +      +
   5197b  GLY*     1.3    72.8    -      -       -      +
   5199b  VAL*     1.3    56.3    +      -       -      +
   5201b  HIS*     4.1     1.3    -      -       -      +
   5202b  HIS*     2.7    42.6    +      -       +      -
   5261b  ALA*     4.7     8.7    -      -       +      -
   5262b  THR*     4.2    14.1    -      -       -      +
   5512b  CLA      4.4    13.0    -      -       +      -
   5513b  CLA      3.8    37.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL5199 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5154b  GLY*     3.6    23.7    -      -       -      +
   5158b  LEU*     4.0    20.0    -      -       +      -
   5159b  THR*     3.9     6.1    -      -       -      +
   5166b  MET*     4.8     1.6    -      -       -      -
   5181b  VAL*     3.3    43.7    -      -       +      +
   5182b  ALA      4.4     0.2    -      -       -      +
   5183b  PRO*     3.6    28.0    -      -       +      -
   5195b  PRO      3.5     4.9    -      -       -      +
   5196b  GLY*     3.6     4.9    -      -       -      +
   5197b  GLY      3.1     0.6    -      -       -      -
   5198b  VAL*     1.3    75.2    -      -       -      +
   5200b  ALA*     1.3    66.8    +      -       -      +
   5201b  HIS      3.0     2.6    +      -       -      -
   5202b  HIS*     3.2     5.0    +      -       -      +
   5203b  ILE*     3.1    22.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA5200 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5183b  PRO*     4.0     5.5    -      -       +      +
   5184b  GLU      3.4    35.7    -      -       -      +
   5185b  TRP*     3.7    22.9    -      -       +      -
   5196b  GLY      3.0    12.1    +      -       -      +
   5199b  VAL*     1.3    77.0    -      -       -      +
   5201b  HIS*     1.3    57.6    +      -       -      +
   5203b  ILE*     3.3     1.0    +      -       -      +
   5204b  ALA*     2.9    32.2    +      -       -      +
   5512b  CLA      3.6    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS5201 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5197b  GLY      3.0    19.5    +      -       -      +
   5198b  VAL*     4.1     4.0    -      -       -      +
   5200b  ALA*     1.3    76.2    -      -       -      +
   5202b  HIS*     1.3    97.7    +      +       -      +
   5203b  ILE      3.0     0.5    +      -       -      -
   5204b  ALA      3.1     0.5    +      -       -      -
   5205b  ALA*     2.8    45.0    +      -       +      +
   5512b  CLA      2.1    84.5    +      +       +      -
   5513b  CLA      3.1    43.0    -      +       +      -
----------------------------------------------------------
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Residues in contact with HIS5202 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5150b  CYS*     3.2    37.9    -      -       -      +
   5151b  PHE*     3.5     5.9    -      -       -      -
   5153b  PHE*     3.8    23.6    -      +       -      -
   5154b  GLY*     3.9    15.0    -      -       -      -
   5158b  LEU*     4.1     0.6    -      -       -      +
   5198b  VAL*     2.7    32.1    +      -       +      -
   5199b  VAL      3.2     4.0    +      -       -      +
   5201b  HIS*     1.3    88.6    -      +       -      +
   5203b  ILE*     1.3    60.2    +      -       -      +
   5206b  GLY*     3.4    12.2    +      -       -      -
   5513b  CLA      2.1    78.6    +      +       +      -
----------------------------------------------------------
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Residues in contact with ILE5203 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5151b  PHE*     3.7    19.1    -      -       +      -
   5154b  GLY      4.0     0.2    -      -       -      -
   5155b  ALA*     3.8    34.8    -      -       +      +
   5159b  THR*     4.8     1.1    -      -       -      +
   5183b  PRO*     3.6    30.3    -      -       +      -
   5185b  TRP*     3.2    26.0    -      -       +      -
   5199b  VAL*     3.1    18.2    +      -       +      +
   5200b  ALA      3.6     7.0    -      -       -      +
   5201b  HIS      3.0     1.0    -      -       -      -
   5202b  HIS*     1.3    77.2    -      -       -      +
   5204b  ALA*     1.3    65.6    +      -       -      +
   5207b  ILE*     3.3    29.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA5204 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5185b  TRP*     4.5     6.7    -      -       +      -
   5200b  ALA      2.9    17.9    +      -       -      +
   5203b  ILE*     1.3    74.3    -      -       -      +
   5205b  ALA*     1.3    52.4    +      -       -      +
   5206b  GLY      2.9     3.4    -      -       -      -
   5207b  ILE*     2.8    12.1    +      -       -      +
   5208b  VAL*     2.8    36.0    +      -       +      +
   5511b  CLA      4.5    13.7    -      -       +      +
   5512b  CLA      3.6    39.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA5205 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5150b  CYS*     4.4     4.7    -      -       -      -
   5201b  HIS*     2.8    40.6    +      -       +      +
   5204b  ALA*     1.3    73.8    -      -       -      +
   5206b  GLY*     1.3    55.0    +      -       -      +
   5208b  VAL*     3.9     0.4    -      -       -      -
   5209b  GLY*     3.0    19.0    +      -       -      -
   5512b  CLA      3.6    38.1    -      -       +      +
   5513b  CLA      5.0     0.7    -      -       +      -
   5515b  CLA      3.1    23.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY5206 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5147b  GLY      3.5    18.8    -      -       -      +
   5150b  CYS*     3.9     8.7    -      -       -      -
   5151b  PHE*     3.9     5.2    -      -       -      -
   5202b  HIS      3.4    21.3    +      -       -      -
   5203b  ILE      4.0     0.9    -      -       -      -
   5204b  ALA      2.8     1.6    +      -       -      -
   5205b  ALA*     1.3    76.3    -      -       -      +
   5207b  ILE*     1.3    58.5    +      -       -      +
   5209b  GLY*     3.0     2.8    +      -       -      -
   5210b  ILE*     2.8    32.8    +      -       -      +
   5515b  CLA      4.3     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE5207 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5151b  PHE*     3.8    24.4    -      -       +      -
   5203b  ILE*     3.3    21.7    +      -       +      +
   5204b  ALA*     2.8     9.5    +      -       -      +
   5206b  GLY*     1.3    71.9    -      -       -      +
   5208b  VAL*     1.3    62.5    +      -       +      +
   5209b  GLY      2.8     4.3    -      -       -      -
   5210b  ILE*     2.8    29.4    +      -       +      +
   5211b  ILE*     2.9    32.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL5208 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5204b  ALA*     2.8    17.7    +      -       +      +
   5207b  ILE*     1.3    77.7    -      -       +      +
   5209b  GLY*     1.3    59.2    +      -       -      +
   5211b  ILE*     4.2    10.2    -      -       +      +
   5212b  ALA*     3.4    22.0    +      -       -      +
   5511b  CLA      4.9     4.7    -      -       -      +
   5512b  CLA      3.3    52.0    -      -       +      -
   5519b  CLA      3.8    22.7    -      -       +      +
   5107h  BCR      4.4     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY5209 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5143b  LEU*     3.4    21.3    -      -       -      +
   5147b  GLY*     4.2     5.6    -      -       -      -
   5205b  ALA      3.0    16.2    +      -       -      -
   5206b  GLY      3.3     5.6    -      -       -      -
   5207b  ILE      2.8     1.2    -      -       -      -
   5208b  VAL*     1.3    79.0    -      -       -      +
   5210b  ILE*     1.3    62.1    +      -       -      +
   5212b  ALA*     4.1     1.5    -      -       -      +
   5213b  GLY*     3.3    15.8    +      -       -      -
   5515b  CLA      4.0    20.0    -      -       -      -
   5519b  CLA      5.7     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE5210 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5144b  PHE*     3.7    31.6    -      -       +      +
   5147b  GLY      4.5     1.6    -      -       -      +
   5148b  LEU*     3.7    41.7    -      -       +      +
   5151b  PHE*     4.5    15.0    -      -       +      -
   5206b  GLY      2.8    17.6    +      -       -      +
   5207b  ILE*     2.8    14.3    +      -       +      +
   5209b  GLY*     1.3    74.7    -      -       -      +
   5211b  ILE*     1.3    72.0    +      -       +      +
   5213b  GLY*     3.2     9.4    +      -       -      -
   5214b  LEU*     3.3    19.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE5211 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5207b  ILE*     2.9    35.0    +      -       +      +
   5208b  VAL*     4.2     8.3    -      -       +      +
   5210b  ILE*     1.3    83.0    -      -       +      +
   5212b  ALA*     1.3    67.8    +      -       -      +
   5213b  GLY      3.0     0.3    +      -       -      -
   5214b  LEU*     3.1    20.1    +      -       +      +
   5215b  PHE*     3.2    11.4    +      -       +      +
   5519b  CLA      4.5    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA5212 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5143b  LEU*     4.1    11.0    -      -       +      -
   5208b  VAL      3.4    17.5    +      -       -      +
   5209b  GLY*     4.1     3.1    -      -       -      +
   5210b  ILE      3.4     0.2    -      -       -      -
   5211b  ILE*     1.3    81.7    -      -       -      +
   5213b  GLY*     1.3    60.5    +      -       -      +
   5215b  PHE*     3.3     7.9    -      -       -      +
   5216b  HIS*     3.0    31.5    +      -       -      +
   5519b  CLA      3.5    43.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY5213 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5140b  GLY*     3.3    21.7    -      -       -      +
   5143b  LEU*     4.0     7.8    -      -       -      +
   5144b  PHE*     4.0    10.1    -      -       -      -
   5209b  GLY      3.3    10.1    +      -       -      -
   5210b  ILE      3.2     7.0    +      -       -      -
   5211b  ILE      3.1     1.6    -      -       -      -
   5212b  ALA*     1.3    74.8    -      -       -      +
   5214b  LEU*     1.3    53.7    +      -       -      +
   5216b  HIS*     3.1     4.7    +      -       -      -
   5217b  ILE*     2.8    37.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU5214 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5144b  PHE*     3.7    28.4    -      -       +      -
   5210b  ILE*     3.3    19.8    +      -       +      +
   5211b  ILE*     3.1    12.5    +      -       +      +
   5213b  GLY*     1.3    71.8    -      -       -      +
   5215b  PHE*     1.3    65.9    +      -       -      +
   5217b  ILE*     2.8    17.5    +      -       +      +
   5218b  LEU*     2.7    40.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE5215 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5211b  ILE*     3.2     7.5    +      -       +      +
   5212b  ALA*     3.3    16.4    -      -       -      +
   5214b  LEU*     1.3    77.1    -      -       -      +
   5216b  HIS*     1.3    70.2    +      +       -      +
   5218b  LEU*     2.8     9.2    +      -       -      -
   5219b  VAL*     2.6    72.5    +      -       +      -
   5519b  CLA      3.5    74.0    -      +       +      -
   5027h  THR*     3.9    12.3    -      -       +      -
   5030h  LEU*     4.8     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS5216 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5136b  PRO*     3.5    19.2    -      -       +      +
   5137b  LYS*     4.2     4.0    -      -       -      -
   5139b  PHE*     3.8    21.3    -      +       -      -
   5140b  GLY*     3.6    24.0    -      -       -      +
   5143b  LEU*     4.6     1.4    -      -       +      +
   5212b  ALA      3.0    20.4    +      -       -      +
   5213b  GLY      3.1     3.7    +      -       -      +
   5215b  PHE*     1.3    88.7    -      +       -      +
   5217b  ILE*     1.3    61.8    +      -       -      +
   5218b  LEU      3.2     0.4    -      -       -      -
   5219b  VAL      3.8    13.1    -      -       -      +
   5519b  CLA      2.4    99.6    +      +       +      +
----------------------------------------------------------
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Residues in contact with ILE5217 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5137b  LYS*     4.2    23.2    -      -       +      +
   5140b  GLY*     3.4    26.2    -      -       -      +
   5141b  ILE*     3.6    21.3    -      -       +      +
   5144b  PHE*     4.1    17.9    -      -       +      -
   5213b  GLY      2.8    15.2    +      -       -      +
   5214b  LEU*     2.8    24.1    +      -       +      +
   5216b  HIS*     1.3    78.7    -      -       -      +
   5218b  LEU*     1.3    76.2    +      -       +      +
   5014h  LEU*     6.5     1.1    -      -       +      -
   5017h  GLU*     5.7     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU5218 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5214b  LEU*     2.7    29.6    +      -       +      +
   5215b  PHE*     2.8     4.2    +      -       -      +
   5217b  ILE*     1.3    98.9    -      -       +      +
   5219b  VAL*     1.3    67.8    +      -       +      +
   5220b  ARG*     3.6     7.3    +      -       -      +
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Residues in contact with VAL5219 (chain b). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5136b  PRO*     6.0     0.5    -      -       -      +
   5215b  PHE*     2.6    53.1    +      -       +      +
   5216b  HIS      3.8    11.8    -      -       -      +
   5218b  LEU*     1.3    74.9    -      -       +      +
   5220b  ARG*     1.3    76.4    +      -       -      +
   5221b  PRO*     4.5     0.5    -      -       -      +
   5519b  CLA      3.7    12.4    -      -       -      +
   5022h  ALA*     5.7     1.8    -      -       +      -
   5027h  THR*     3.6    22.0    -      -       +      +
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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