Contacts of the helix formed by residues 1453 - 1476 (chain A) in PDB entry 5A31


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 ASN1453 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1397A  ASP*     5.5     4.7    -      -       -      +
   1452A  LEU*     1.3    83.4    +      -       -      +
   1454A  LEU*     1.3    66.7    +      -       -      +
   1455A  GLU*     3.1     8.5    +      -       +      +
   1456A  THR*     3.2    22.5    +      -       -      +
   1457A  LEU*     3.2    22.4    +      -       -      +
     71L  LYS*     5.0     1.8    -      -       -      +
    133L  ARG*     3.3    57.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1454 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1437A  ASN*     5.2    11.9    -      -       +      +
   1452A  LEU*     4.0    15.2    +      -       -      +
   1453A  ASN*     1.3    73.6    -      -       -      +
   1455A  GLU*     1.3    57.2    +      -       -      +
   1457A  LEU*     3.8    20.5    -      -       +      +
   1458A  SER*     2.7    37.4    +      -       -      +
   1506A  VAL*     5.4    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1455 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1453A  ASN*     3.1     9.1    +      -       +      +
   1454A  LEU*     1.3    78.2    -      -       -      +
   1456A  THR*     1.3    66.3    +      -       -      +
   1458A  SER*     4.1     3.0    -      -       -      -
   1459A  GLN*     3.0    47.8    +      -       -      +
   1506A  VAL*     3.6    32.2    -      -       +      +
     71L  LYS*     3.7    25.6    +      -       -      +
    100L  ASN*     4.9     2.9    -      -       -      +
    132L  THR*     6.2     0.2    -      -       -      +
    133L  ARG*     3.9    10.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR1456 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1393A  MET      5.5     0.4    -      -       -      +
   1396A  LEU*     4.2    28.2    -      -       +      +
   1397A  ASP*     3.9    19.7    +      -       -      +
   1399A  VAL      5.6     0.9    -      -       -      +
   1401A  PRO*     5.3     5.1    -      -       +      +
   1453A  ASN*     3.2    19.2    +      -       -      +
   1455A  GLU*     1.3    80.0    -      -       -      +
   1457A  LEU*     1.3    62.5    +      -       +      +
   1459A  GLN*     3.9    10.7    -      -       -      +
   1460A  ALA*     3.2    22.5    +      -       +      +
     71L  LYS*     3.1    34.9    +      -       +      +
    135L  PHE*     5.7     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1457 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1393A  MET*     5.5     4.7    -      -       +      -
   1396A  LEU*     4.0    14.1    -      -       +      -
   1433A  ILE*     3.9    20.0    -      -       +      +
   1434A  ILE*     3.7    31.8    -      -       +      +
   1437A  ASN*     3.6    41.1    -      -       +      -
   1452A  LEU      5.8     4.9    -      -       -      +
   1453A  ASN      3.2    14.3    +      -       -      +
   1454A  LEU*     3.8    15.0    -      -       +      +
   1456A  THR*     1.3    80.4    -      -       +      +
   1458A  SER*     1.3    65.4    +      -       -      +
   1460A  ALA*     3.3     5.3    +      -       -      +
   1461A  HIS*     3.2    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1458 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1454A  LEU*     2.7    26.7    +      -       -      +
   1455A  GLU*     4.1     2.5    -      -       -      -
   1457A  LEU*     1.3    73.1    -      -       -      +
   1459A  GLN*     1.3    63.8    +      -       -      +
   1461A  HIS*     3.4    15.3    +      -       -      +
   1462A  VAL*     3.4    17.8    +      -       -      +
   1498A  TYR*     5.6     3.1    -      -       -      -
   1503A  ASN*     4.1    15.3    +      -       -      -
   1506A  VAL*     4.9     5.4    -      -       -      -
   1507A  THR*     3.7    25.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1459 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1401A  PRO*     3.6    15.1    -      -       +      +
   1455A  GLU*     3.0    39.3    +      -       -      +
   1456A  THR*     3.9    10.4    -      -       -      +
   1458A  SER*     1.3    72.9    -      -       -      +
   1460A  ALA*     1.3    66.8    +      -       -      +
   1461A  HIS      3.1     0.5    +      -       -      -
   1462A  VAL*     3.1     9.8    -      -       -      +
   1463A  TYR*     3.0    27.2    +      -       +      -
   1506A  VAL      4.2     2.6    +      -       -      -
   1507A  THR*     3.4    32.9    +      -       -      +
   1508A  GLY*     5.0     1.4    -      -       -      -
   1511A  ASN*     3.1    25.3    +      -       +      +
     71L  LYS*     4.7     4.3    -      -       -      -
    100L  ASN*     2.9    27.0    +      -       -      +
    104L  ASN*     5.3     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1460 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1396A  LEU*     4.1     8.1    -      -       +      -
   1401A  PRO*     4.4     4.9    -      -       +      +
   1404A  LEU*     3.6    27.6    -      -       +      -
   1434A  ILE*     3.6    21.8    -      -       +      -
   1456A  THR*     3.2    16.4    +      -       +      +
   1457A  LEU*     3.7     4.0    -      -       -      +
   1459A  GLN*     1.3    78.7    -      -       -      +
   1461A  HIS*     1.3    56.4    +      -       -      +
   1463A  TYR*     4.7     0.7    -      -       -      +
   1464A  ILE*     2.9    38.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS1461 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1430A  VAL*     3.9    27.5    -      -       +      +
   1434A  ILE*     3.7    23.0    +      -       +      +
   1435A  ARG*     6.1     2.2    -      -       -      -
   1457A  LEU      3.2     6.9    +      -       -      +
   1458A  SER*     3.5    12.3    -      -       -      +
   1459A  GLN      3.1     0.6    -      -       -      -
   1460A  ALA*     1.3    76.5    -      -       -      +
   1462A  VAL*     1.3    70.8    +      -       +      +
   1464A  ILE*     4.0     1.2    -      -       -      +
   1465A  ILE*     3.1    44.4    +      -       +      +
   1498A  TYR*     4.7    16.5    +      +       -      -
----------------------------------------------------------
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Residues in contact with VAL1462 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1458A  SER*     3.6    13.0    -      -       -      +
   1459A  GLN*     3.1    20.9    +      -       -      +
   1461A  HIS*     1.3    83.4    -      -       +      +
   1463A  TYR*     1.3    79.6    +      -       +      +
   1465A  ILE*     3.1    14.4    -      -       +      +
   1466A  ALA*     2.9    27.4    +      -       -      +
   1495A  PHE*     4.0     9.5    -      -       +      -
   1498A  TYR*     5.2    12.1    -      -       +      -
   1507A  THR*     4.1    15.0    -      -       -      +
   1511A  ASN*     4.8     3.1    -      -       +      +
   1512A  LEU*     4.1    14.4    -      -       +      -
   1515A  CYS*     3.7    26.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR1463 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1401A  PRO*     3.5    39.9    -      -       +      +
   1402A  GLU*     4.3    15.3    -      -       +      +
   1404A  LEU*     4.8     1.8    -      -       +      -
   1405A  LEU*     3.6    37.7    -      -       +      +
   1459A  GLN*     3.0    21.3    +      -       +      +
   1460A  ALA*     4.3     2.0    -      -       -      +
   1462A  VAL*     1.3    84.7    -      -       +      +
   1464A  ILE*     1.3    58.6    +      -       -      +
   1466A  ALA*     3.7     3.6    -      -       -      +
   1467A  GLY      2.9    23.7    +      -       -      -
   1510A  HIS*     5.6     0.3    +      -       -      -
   1511A  ASN*     3.4    55.0    +      -       +      +
   1514A  THR*     4.0    29.5    +      -       +      +
   1515A  CYS*     4.3     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1464 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1389A  ALA*     4.7     5.2    -      -       +      -
   1396A  LEU*     5.2     0.9    -      -       +      -
   1404A  LEU*     3.6    40.4    -      -       +      -
   1408A  THR*     3.8    20.5    -      -       +      +
   1426A  VAL      5.6     0.2    -      -       -      +
   1429A  ASN*     3.9     9.0    -      -       +      +
   1430A  VAL*     3.8    30.5    -      -       +      +
   1431A  PRO*     4.0    12.8    -      -       +      -
   1434A  ILE*     3.9    21.8    -      -       +      -
   1460A  ALA      2.9    23.0    +      -       -      +
   1461A  HIS*     4.0     3.1    -      -       -      +
   1463A  TYR*     1.3    73.4    -      -       -      +
   1465A  ILE*     1.3    67.0    +      -       +      +
   1468A  ALA*     3.0    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1465 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1426A  VAL*     4.1    30.8    -      -       +      +
   1427A  ASP*     5.4     3.8    -      -       -      -
   1430A  VAL*     5.4     4.5    -      -       +      -
   1461A  HIS*     3.1    36.8    +      -       +      +
   1462A  VAL*     3.1    17.9    -      -       +      +
   1464A  ILE*     1.3    80.0    -      -       +      +
   1466A  ALA*     1.3    57.1    +      -       -      +
   1468A  ALA*     3.1     1.7    +      -       -      +
   1469A  CYS*     2.8    35.2    +      -       +      +
   1491A  PHE*     4.1    23.3    -      -       +      -
   1495A  PHE*     3.5    29.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1466 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1405A  LEU*     4.0     5.2    -      -       +      -
   1462A  VAL      2.9    16.9    +      -       -      +
   1463A  TYR*     3.7     4.5    -      -       -      +
   1465A  ILE*     1.3    79.3    -      -       -      +
   1467A  GLY*     1.3    58.2    +      -       -      +
   1469A  CYS*     3.1    12.3    -      -       -      -
   1470A  LEU*     2.7    31.2    +      -       -      +
   1495A  PHE*     4.9     3.1    -      -       +      -
   1515A  CYS*     3.7    29.2    -      -       +      +
   1518A  VAL*     3.8    20.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY1467 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1405A  LEU*     3.0    35.7    -      -       -      +
   1408A  THR*     4.4     8.3    -      -       -      -
   1409A  LEU*     3.8     8.1    -      -       -      +
   1463A  TYR      2.9    13.8    +      -       -      -
   1464A  ILE      4.0     0.9    -      -       -      -
   1466A  ALA*     1.3    76.8    -      -       -      +
   1468A  ALA*     1.3    56.5    +      -       -      +
   1470A  LEU*     3.6     3.6    +      -       -      +
   1471A  SER*     3.0    26.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1468 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1408A  THR*     4.1    10.9    -      -       +      +
   1412A  CYS*     4.8     1.1    -      -       -      -
   1425A  TRP*     3.4    16.1    -      -       +      -
   1426A  VAL*     4.1    10.3    -      -       +      +
   1429A  ASN*     3.6    30.7    -      -       +      +
   1464A  ILE      3.0    18.8    +      -       -      +
   1465A  ILE*     3.7     2.5    -      -       -      +
   1466A  ALA      3.1     0.2    -      -       -      -
   1467A  GLY*     1.3    75.2    -      -       -      +
   1469A  CYS*     1.3    60.7    +      -       -      +
   1471A  SER*     3.2     8.4    +      -       -      -
   1472A  LEU      2.9    23.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS1469 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1426A  VAL*     4.1    11.1    -      -       +      +
   1465A  ILE      2.8    15.3    +      -       -      +
   1466A  ALA*     3.1    22.7    -      -       -      -
   1468A  ALA*     1.3    76.4    -      -       -      +
   1470A  LEU*     1.3    58.1    +      -       -      +
   1472A  LEU*     3.0     8.5    -      -       -      +
   1473A  GLY      2.9    23.9    +      -       -      -
   1488A  LEU*     3.4    24.4    -      -       +      +
   1491A  PHE*     4.6    10.1    -      -       +      -
   1495A  PHE*     5.6     1.1    -      -       -      -
   1519A  VAL*     3.4    44.2    -      -       +      -
   1522A  SER*     3.7     5.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1470 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1405A  LEU*     4.8     4.5    -      -       +      -
   1409A  LEU*     3.3    40.6    -      -       +      -
   1466A  ALA      2.7    21.0    +      -       -      +
   1467A  GLY*     3.6     4.5    -      -       -      +
   1469A  CYS*     1.3    74.2    -      -       -      +
   1471A  SER*     1.3    58.5    +      -       -      +
   1473A  GLY*     3.2     3.6    +      -       -      -
   1474A  PHE*     3.1    39.4    +      -       +      -
   1518A  VAL*     3.5    33.7    -      -       +      +
   1521A  LEU*     5.9     2.9    -      -       +      -
   1522A  SER*     2.8    20.8    +      -       -      +
   1525A  MET*     5.0     6.8    -      -       +      +
   1588A  LEU*     4.4    17.0    -      -       +      +
   1590A  PRO*     5.1     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1471 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1409A  LEU*     3.8    10.1    +      -       -      -
   1412A  CYS*     2.9    42.3    -      -       -      +
   1413A  LEU*     3.8     8.3    +      -       -      +
   1419A  ILE*     4.0     8.4    -      -       -      +
   1425A  TRP*     4.5     1.6    -      -       -      -
   1467A  GLY      3.0    15.4    +      -       -      -
   1468A  ALA*     3.2    10.0    +      -       -      -
   1470A  LEU*     1.3    77.0    -      -       -      +
   1472A  LEU*     1.3    67.4    +      -       -      +
   1474A  PHE*     3.5     7.4    +      -       -      +
   1475A  ARG*     3.2    19.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1472 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1419A  ILE*     4.0    14.4    -      -       +      -
   1420A  LEU      4.0     1.8    -      -       -      +
   1421A  PRO*     3.8    23.3    -      -       +      +
   1425A  TRP*     4.6     3.5    -      -       +      -
   1426A  VAL*     4.1    13.7    -      -       +      -
   1468A  ALA      2.9    12.5    +      -       -      +
   1469A  CYS      3.0    12.1    +      -       -      +
   1471A  SER*     1.3    76.0    -      -       -      +
   1473A  GLY*     1.3    61.4    +      -       -      +
   1475A  ARG*     3.0     3.8    +      -       -      -
   1476A  PHE*     2.9    61.5    +      -       +      +
   1484A  ALA*     4.4    10.8    -      -       +      -
   1487A  CYS*     3.6    30.7    -      -       -      -
   1488A  LEU*     3.7    15.3    -      -       +      -
   1526A  VAL*     4.6     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY1473 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1469A  CYS      2.9    13.0    +      -       -      -
   1470A  LEU      3.2     6.5    +      -       -      -
   1472A  LEU*     1.3    72.9    -      -       -      +
   1474A  PHE*     1.3    56.3    +      -       -      -
   1476A  PHE      3.1     2.6    +      -       -      -
   1477A  ALA*     2.9    31.9    +      -       -      +
   1488A  LEU*     4.4     0.2    -      -       -      +
   1522A  SER*     3.9    16.6    -      -       -      -
   1525A  MET*     4.1     7.0    -      -       -      -
   1526A  VAL*     3.6    21.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1474 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1409A  LEU*     4.8     2.9    -      -       +      -
   1413A  LEU*     4.1    16.8    -      -       +      -
   1416A  TRP*     3.7     6.0    -      -       +      -
   1470A  LEU*     3.1    49.3    +      -       +      -
   1471A  SER*     3.8     8.5    -      -       -      +
   1472A  LEU      3.4     0.4    -      -       -      -
   1473A  GLY*     1.3    73.3    -      -       -      +
   1475A  ARG*     1.3    59.4    +      -       -      +
   1477A  ALA*     3.9     4.0    +      -       -      +
   1525A  MET*     4.1    19.5    -      -       +      -
   1576A  THR*     3.1    26.0    -      -       -      +
   1581A  ILE*     3.8    32.7    -      -       +      +
   1584A  LEU*     3.5    37.6    -      -       +      +
   1585A  LEU*     3.3    36.6    -      -       +      -
   1588A  LEU*     4.7     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG1475 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1416A  TRP*     3.2    60.8    +      -       +      +
   1419A  ILE*     3.8    29.0    +      -       +      -
   1471A  SER      3.2     2.8    +      -       -      +
   1472A  LEU      3.0     5.2    +      -       -      +
   1474A  PHE*     1.3    80.7    -      -       -      +
   1476A  PHE*     1.3    97.6    +      -       +      +
   1477A  ALA      3.2     3.4    +      -       -      +
   1479A  SER*     4.8     1.9    +      -       -      -
   1576A  THR*     3.9     9.0    -      -       -      +
   1643A  TRP*     3.4    44.6    -      -       -      -
   1644A  TYR*     5.2     6.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE1476 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1419A  ILE*     4.1     9.2    -      -       +      -
   1421A  PRO*     3.7    25.8    -      -       +      -
   1472A  LEU*     2.9    40.1    +      -       +      +
   1473A  GLY      3.4     2.7    -      -       -      -
   1475A  ARG*     1.3   116.2    -      -       +      +
   1477A  ALA*     1.3    65.6    +      -       -      +
   1479A  SER*     3.2    18.7    +      -       -      +
   1481A  ASN*     3.4    35.4    -      -       +      -
   1484A  ALA*     4.3     9.4    -      -       +      -
   1526A  VAL*     2.9    30.3    -      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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