Contacts of the helix formed by residues 425 - 448 (chain G) in PDB entry 6S7T


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 ALA 425 (chain G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52D  PRO*     3.6    21.1    -      -       +      -
     55D  SER*     4.2     8.3    -      -       -      +
    422G  ILE*     3.6    18.1    +      -       +      +
    423G  PRO      2.8     1.6    +      -       -      -
    424G  SER*     1.3    78.9    -      -       -      +
    426G  TYR*     1.3    62.9    +      -       -      +
    427G  PRO*     3.3     2.2    -      -       -      -
    428G  TYR*     3.5    30.1    +      -       +      -
    429G  TYR*     3.2    27.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 426 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    539F  THR*     6.2     1.1    -      -       +      -
    542F  SER*     3.9     6.5    -      -       -      +
    543F  ASN*     4.7    12.8    -      -       -      +
    546F  THR*     3.6    19.1    +      -       +      +
    594F  TRP*     6.5     0.4    -      +       -      -
    421G  PHE*     4.1    17.5    +      +       +      +
    422G  ILE      4.2     6.7    -      -       -      -
    423G  PRO*     3.0    38.8    +      -       +      +
    425G  ALA*     1.3    74.8    -      -       -      +
    427G  PRO*     1.3    71.7    -      -       +      +
    429G  TYR*     4.0    20.6    -      +       +      +
    430G  ALA*     3.3    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 427 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  GLN*     5.9     0.2    -      -       +      -
     44D  TYR*     3.4    37.2    -      -       +      +
    542F  SER*     3.6    20.0    -      -       -      +
    545F  PHE*     4.0    16.6    -      -       +      -
    546F  THR*     3.9     7.6    -      -       -      +
    549F  ILE*     3.4    27.6    -      -       +      +
    424G  SER      4.1     6.3    -      -       -      +
    425G  ALA      3.5     3.6    -      -       -      -
    426G  TYR*     1.3    88.3    -      -       +      +
    428G  TYR*     1.3    65.2    +      -       +      +
    430G  ALA*     2.9     8.1    +      -       +      +
    431G  SER      2.8    19.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 428 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  GLN*     3.6    28.0    -      -       +      +
     44D  TYR*     3.7    30.7    +      +       -      -
     45D  CYS*     4.2    13.9    -      -       +      +
     48D  VAL*     5.6     0.3    -      -       -      +
     49D  GLY      4.3     9.0    +      -       -      -
     50D  THR*     5.1     1.9    -      -       -      -
     52D  PRO*     3.9    17.8    -      -       +      +
     55D  SER*     3.7    26.5    -      -       -      +
     56D  PHE*     3.6    41.1    -      +       +      +
     59D  GLY*     4.8     4.6    -      -       -      -
    112D  VAL*     5.3     2.7    -      -       +      -
    424G  SER      4.5     1.1    -      -       -      -
    425G  ALA*     3.5    34.3    -      -       +      +
    426G  TYR      3.5     0.2    -      -       -      -
    427G  PRO*     1.3    73.8    -      -       +      +
    429G  TYR*     1.3    67.8    +      -       +      +
    431G  SER*     3.0    18.0    +      -       -      -
    432G  ALA*     3.0    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 429 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55D  SER*     4.0    13.4    +      -       -      -
    112D  VAL*     3.6    34.9    -      -       +      -
    594F  TRP*     4.0    37.7    -      +       +      -
    420G  ARG*     5.1     1.0    -      -       -      -
    421G  PHE*     3.8    28.7    +      +       -      -
    422G  ILE*     4.1    25.6    +      -       -      +
    425G  ALA*     3.2    23.8    -      -       +      +
    426G  TYR*     4.0    21.8    -      +       +      +
    428G  TYR*     1.3    78.9    -      -       +      +
    430G  ALA*     1.3    67.2    +      -       -      +
    432G  ALA*     3.0    12.5    +      -       -      +
    433G  PHE*     3.1    24.5    +      +       +      -
----------------------------------------------------------
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Residues in contact with ALA 430 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    546F  THR*     4.1    20.0    -      -       +      -
    549F  ILE*     4.3     5.8    -      -       +      -
    550F  LEU*     4.1    16.8    -      -       +      -
    426G  TYR      3.3    12.5    +      -       -      +
    427G  PRO*     2.9    11.1    +      -       +      +
    429G  TYR*     1.3    78.9    -      -       -      +
    431G  SER*     1.3    66.8    +      -       -      +
    433G  PHE*     3.0     6.0    +      -       -      +
    434G  SER*     2.7    26.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 431 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37D  THR*     3.6    13.8    -      -       -      +
     41D  GLN*     2.5    35.3    +      -       -      -
     59D  GLY*     4.5     3.3    +      -       -      -
     62D  SER*     6.1     0.2    -      -       -      -
     63D  CYS*     3.7     8.8    -      -       -      -
    549F  ILE*     3.9    18.1    -      -       -      +
    427G  PRO      2.8    13.6    +      -       -      -
    428G  TYR      3.2     8.7    -      -       -      -
    430G  ALA*     1.3    74.2    -      -       -      +
    432G  ALA*     1.3    67.4    +      -       -      +
    434G  SER*     3.0    11.4    +      -       -      -
    435G  MET*     3.1    15.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 432 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58D  SER*     5.5     1.1    -      -       -      +
     59D  GLY*     5.3     5.3    -      -       -      -
     62D  SER*     4.6    15.2    +      -       -      +
    105D  HIS*     5.6     1.0    +      -       -      -
    108D  VAL*     4.4    22.9    -      -       +      -
    109D  MET*     4.4    14.4    -      -       +      -
    112D  VAL*     6.0     4.0    -      -       +      -
    428G  TYR      3.0    11.6    +      -       -      +
    429G  TYR*     3.5     9.9    -      -       -      +
    431G  SER*     1.3    76.5    -      -       -      +
    433G  PHE*     1.3    66.9    +      -       +      +
    435G  MET*     3.0    12.7    +      -       -      +
    436G  MET*     3.2    16.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 433 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109D  MET*     3.6    25.6    -      -       +      -
    591F  TYR*     3.4    38.4    -      +       +      -
    594F  TRP*     3.3    45.5    -      +       +      -
    429G  TYR*     3.1    27.6    +      +       +      -
    430G  ALA*     3.0     8.5    +      -       -      +
    432G  ALA*     1.3    78.6    -      -       +      +
    434G  SER*     1.3    66.6    +      -       -      +
    436G  MET*     3.0    24.7    +      -       +      +
    437G  LEU*     3.0    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 434 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33D  TYR*     2.4    32.8    +      -       -      -
     37D  THR*     5.2     3.8    +      -       -      +
    549F  ILE*     4.7    14.1    +      -       -      -
    550F  LEU*     5.4     8.9    -      -       -      -
    553F  LEU*     4.5    13.8    -      -       -      +
    430G  ALA      2.7    17.5    +      -       -      -
    431G  SER*     3.2    13.9    -      -       -      -
    433G  PHE*     1.3    73.2    -      -       -      +
    435G  MET*     1.3    58.9    +      -       -      +
    437G  LEU*     3.0     8.0    +      -       -      +
    438G  GLY      2.8    23.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 435 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  TYR*     4.5     3.0    +      -       -      +
     33D  TYR*     4.1    13.2    -      -       +      +
     34D  ILE*     3.9    22.9    -      -       +      -
     37D  THR*     4.9     6.1    -      -       +      -
     62D  SER*     3.2    39.7    -      -       -      +
     63D  CYS*     3.5    34.1    -      -       -      -
     66D  SER*     3.4    26.5    -      -       -      +
    105D  HIS*     4.8     6.2    -      -       -      +
    431G  SER*     3.1    15.5    +      -       -      +
    432G  ALA      3.0     7.8    +      -       -      +
    434G  SER*     1.3    75.0    -      -       -      +
    436G  MET*     1.3    52.9    +      -       -      +
    438G  GLY*     3.0     2.4    +      -       -      +
    439G  LEU*     2.7    36.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 436 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105D  HIS*     3.8    43.2    -      -       +      +
    108D  VAL*     5.8     0.9    -      -       +      -
    109D  MET*     3.6    37.7    -      -       +      -
    587F  LEU*     4.0    26.3    -      -       +      +
    590F  MET*     3.6    25.8    -      -       +      -
    432G  ALA*     3.2    12.2    +      -       +      +
    433G  PHE*     3.0    29.9    +      -       +      +
    435G  MET*     1.3    76.6    -      -       -      +
    437G  LEU*     1.3    64.6    +      -       -      +
    439G  LEU*     3.0    10.8    +      -       -      +
    440G  PHE*     3.0    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 437 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    553F  LEU*     4.1    24.5    -      -       +      -
    557F  PHE*     4.9     5.4    -      -       +      -
    433G  PHE      3.0     9.3    +      -       -      +
    434G  SER*     3.0    11.3    +      -       -      +
    436G  MET*     1.3    74.4    -      -       -      +
    438G  GLY*     1.3    65.7    +      -       -      +
    440G  PHE*     3.0    10.7    +      -       +      +
    441G  ILE*     3.0    45.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 438 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  TYR*     4.2    13.4    -      -       -      -
     33D  TYR*     4.8    10.8    -      -       -      -
    553F  LEU*     5.5     2.9    -      -       -      +
    556F  LEU*     5.7     4.7    -      -       -      +
    557F  PHE*     6.4     1.8    -      -       -      -
    560F  TRP*     5.4     0.7    -      -       -      -
    434G  SER      2.8    16.7    +      -       -      -
    435G  MET*     3.0     5.6    +      -       -      -
    437G  LEU*     1.3    77.2    -      -       -      +
    439G  LEU*     1.3    64.1    +      -       -      +
    441G  ILE*     3.0     7.7    +      -       -      +
    442G  PHE*     2.8    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 439 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  TYR*     4.0    14.6    +      -       -      +
     97D  PHE*     3.5    37.2    -      -       +      -
     98D  LEU*     5.0     5.6    -      -       +      -
    101D  SER*     3.2    28.3    -      -       -      +
    105D  HIS*     4.1    13.9    -      -       +      +
    583F  HIS*     4.2    23.8    -      -       +      +
    587F  LEU*     4.8     8.7    -      -       +      -
    435G  MET      2.7    15.0    +      -       -      +
    436G  MET*     3.0     9.2    +      -       -      +
    438G  GLY*     1.3    69.8    -      -       -      +
    440G  PHE*     1.3    65.4    +      -       -      +
    442G  PHE*     3.0    13.2    +      -       +      +
    443G  SER*     2.9    21.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 440 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    580F  HIS*     3.8    29.8    -      -       +      -
    583F  HIS*     3.8    21.8    -      +       -      -
    584F  ALA*     3.8    28.0    -      -       +      -
    587F  LEU*     4.0    13.0    -      -       +      +
    436G  MET      3.0     9.3    +      -       -      +
    437G  LEU*     3.0    13.8    +      -       +      +
    439G  LEU*     1.3    75.7    -      -       -      +
    441G  ILE*     1.3    75.6    +      -       +      +
    443G  SER*     3.0    17.8    +      -       -      +
    444G  ILE*     3.2    44.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 441 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    556F  LEU*     5.5     0.9    -      -       +      -
    557F  PHE*     4.1    31.2    -      -       +      -
    560F  TRP*     3.6    22.9    -      -       +      -
    437G  LEU*     3.0    36.7    +      -       +      +
    438G  GLY*     3.5     7.4    -      -       -      +
    440G  PHE*     1.3    84.0    -      -       +      +
    442G  PHE*     1.3    64.8    +      -       -      +
    444G  ILE*     3.0    22.8    +      -       +      +
    445G  VAL*     3.1    21.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 442 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26D  LEU*     5.1     5.2    -      -       +      -
     27D  LEU*     3.4    42.0    -      -       +      -
     30D  TYR*     4.2    23.3    -      +       +      -
     73D  LEU*     4.8     4.5    -      -       +      -
     94D  PHE*     4.5     7.6    -      +       -      -
     97D  PHE*     4.1    30.3    -      +       -      -
    560F  TRP*     3.6    30.0    -      +       +      -
    438G  GLY      2.8    12.9    +      -       -      +
    439G  LEU*     3.2    13.7    -      -       +      +
    441G  ILE*     1.3    77.3    -      -       -      +
    443G  SER*     1.3    61.1    +      -       -      +
    445G  VAL      3.0     3.1    +      -       -      -
    446G  PHE*     2.8    64.2    +      +       +      +
----------------------------------------------------------
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Residues in contact with SER 443 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  PHE*     3.7    24.8    -      -       -      -
     98D  LEU*     5.0     4.1    -      -       -      +
    579F  PHE*     4.5     5.4    -      -       -      -
    580F  HIS*     3.9    16.9    +      -       -      -
    583F  HIS*     4.8    15.7    -      -       -      -
    439G  LEU*     2.9    13.0    +      -       -      -
    440G  PHE*     3.0    12.1    +      -       -      -
    442G  PHE*     1.3    81.2    -      -       -      +
    444G  ILE*     1.3    64.3    +      -       -      +
    446G  PHE*     3.0    12.5    +      -       -      +
    447G  LEU*     3.2    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 444 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    567F  VAL*     3.6    24.7    -      -       +      +
    570F  PHE*     4.6    20.0    -      -       +      -
    580F  HIS*     4.2    24.2    -      -       +      +
    440G  PHE*     3.4    48.7    -      -       +      +
    441G  ILE*     3.0    14.2    +      -       +      +
    443G  SER*     1.3    74.6    -      -       -      +
    445G  VAL*     1.3    61.1    +      -       +      +
    447G  LEU      4.6     0.2    -      -       -      -
    448G  HIS*     3.9    17.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 445 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26D  LEU*     3.7    16.2    -      -       +      +
    560F  TRP*     3.6    27.6    -      -       +      -
    565F  ALA*     3.6    34.5    -      -       +      +
    566F  ASN      5.2     2.2    -      -       -      +
    567F  VAL*     4.6    13.5    -      -       +      -
    441G  ILE*     3.4    17.7    -      -       +      +
    442G  PHE      3.0     6.3    +      -       -      +
    444G  ILE*     1.3    82.8    -      -       +      +
    446G  PHE*     1.3    60.2    +      -       -      +
    448G  HIS      5.4     0.2    -      -       -      -
    449G  MET*     3.3    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 446 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23D  ARG*     3.6    65.3    +      -       +      -
     26D  LEU*     4.9     6.3    -      -       +      -
     27D  LEU*     5.2     4.0    -      -       +      -
     73D  LEU*     3.9    15.5    -      -       +      -
     77D  ILE*     3.4    34.5    -      -       +      -
     94D  PHE*     3.6    38.1    -      +       +      -
    442G  PHE*     2.8    45.6    +      +       +      +
    443G  SER      3.0     2.6    +      -       -      +
    445G  VAL*     1.3    80.0    -      -       -      +
    447G  LEU*     1.3    67.4    +      -       +      +
    449G  MET*     4.3     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 447 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23D  ARG*     3.8    14.4    +      -       -      +
     91D  GLU*     4.2    17.5    -      -       -      +
     94D  PHE*     3.7    41.7    -      -       +      -
    569F  ASN*     5.1     3.3    +      -       -      +
    579F  PHE*     4.1     7.6    -      -       +      -
    580F  HIS*     4.2     8.7    -      -       +      +
    620F  MET*     3.6    32.5    -      -       +      -
    621F  LEU*     4.6     1.3    -      -       +      -
    624F  GLN*     3.7    25.0    -      -       +      +
    443G  SER*     3.2    20.5    +      -       -      +
    446G  PHE*     1.3    83.3    -      -       +      +
    448G  HIS*     1.3    71.2    +      -       +      +
    449G  MET      3.3     5.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 448 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    566F  ASN      3.2     5.3    -      -       -      +
    567F  VAL*     3.5    18.0    -      -       +      -
    568F  SER      3.2    20.8    +      -       -      -
    569F  ASN*     2.3    39.9    +      -       -      +
    570F  PHE*     3.7    28.0    -      +       -      -
    571F  THR      5.7     0.7    -      -       -      -
    576F  THR*     4.5    17.9    -      -       +      -
    580F  HIS*     3.1    33.9    +      +       -      -
    620F  MET*     5.0     2.9    -      -       -      -
    624F  GLN*     4.5    17.2    +      -       -      -
    444G  ILE*     3.9    17.2    +      -       -      +
    445G  VAL      4.6     1.8    -      -       -      -
    447G  LEU*     1.3    85.7    +      -       +      +
    449G  MET*     1.3    62.8    +      -       -      +
----------------------------------------------------------
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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