Contacts of the helix formed by residues 1548 - 1569 (chain A) in PDB entry 4LX2


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 ASP1548 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1495A  PRO*     5.7     0.2    -      -       -      +
   1496A  ARG*     3.9    18.8    +      -       -      -
   1545A  ARG*     3.1    17.2    +      -       +      +
   1547A  ASP*     1.3    82.6    +      -       -      +
   1549A  PHE*     1.3    66.7    +      -       -      +
   1550A  GLU*     3.5    10.9    +      -       -      +
   1551A  THR*     2.6    32.2    +      -       -      +
   1552A  VAL*     3.1    23.9    +      -       -      +
   1614A  VAL*     4.5     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE1549 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1547A  ASP      3.8     4.4    +      -       -      -
   1548A  ASP*     1.3    74.5    +      -       -      +
   1550A  GLU*     1.3    65.2    +      -       +      +
   1552A  VAL*     3.3     5.3    +      -       -      +
   1553A  SER*     2.8    33.8    +      -       -      -
   1611A  LEU*     3.6    23.8    -      -       +      -
   1614A  VAL*     3.8    22.2    -      -       +      +
   1615A  LEU*     5.6     4.5    -      -       +      +
   1618A  ILE*     4.2    12.5    -      -       +      +
   1668A  SER*     4.2     3.4    -      -       -      -
   1669A  PHE*     3.4    58.8    -      +       +      -
   1672A  VAL*     3.4    36.8    -      -       +      -
   1673A  MET*     4.5     8.7    -      -       +      -
   1686A  VAL*     6.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1550 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1495A  PRO*     4.5     6.8    -      -       +      +
   1496A  ARG*     2.7    57.3    +      -       -      +
   1548A  ASP*     3.2    12.1    +      -       -      +
   1549A  PHE*     1.3    87.6    -      -       +      +
   1551A  THR*     1.3    58.0    +      -       -      +
   1554A  PHE*     2.9    26.9    +      -       -      +
   1672A  VAL*     3.9    29.3    -      -       +      +
   1675A  GLN*     5.8     1.6    +      -       -      -
   1676A  HIS*     3.2    19.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with THR1551 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1495A  PRO*     4.2    11.3    -      -       +      +
   1541A  VAL*     3.8    26.0    -      -       +      -
   1542A  LEU*     4.1     4.7    -      -       +      +
   1545A  ARG*     2.9    49.8    +      -       +      +
   1548A  ASP*     2.6    27.8    +      -       -      +
   1550A  GLU*     1.3    80.1    -      -       -      +
   1552A  VAL*     1.3    61.8    +      -       -      +
   1554A  PHE*     3.3     0.7    +      -       -      +
   1555A  TRP*     3.1    30.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1552 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1542A  LEU*     4.0     9.6    -      -       +      -
   1545A  ARG      4.4     0.4    -      -       -      +
   1546A  GLY*     3.3    34.8    -      -       -      +
   1548A  ASP      3.1    15.6    +      -       -      +
   1549A  PHE*     3.8     5.8    -      -       -      +
   1551A  THR*     1.3    76.4    -      -       -      +
   1553A  SER*     1.3    56.9    +      -       -      +
   1555A  TRP      3.4     0.9    +      -       -      -
   1556A  LEU*     2.9    29.2    +      -       -      +
   1607A  ILE*     3.7    19.5    -      -       +      +
   1610A  GLN*     4.1    10.3    -      -       +      +
   1611A  LEU*     3.7    39.7    -      -       +      +
   1614A  VAL*     4.6     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1553 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1549A  PHE*     2.8    38.1    +      -       -      -
   1550A  GLU      3.8     1.6    -      -       -      -
   1552A  VAL*     1.3    73.9    -      -       -      +
   1554A  PHE*     1.3    64.0    +      -       -      +
   1556A  LEU*     3.7     1.9    -      -       -      +
   1557A  SER*     2.8    30.5    +      -       -      -
   1611A  LEU*     4.0     6.6    -      -       -      +
   1672A  VAL*     4.3     1.3    -      -       -      -
   1673A  MET*     3.8    12.8    -      -       -      +
   1676A  HIS*     2.9    19.9    +      -       -      -
   1678A  MET*     3.5    24.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1554 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1493A  LEU*     3.5    32.8    -      -       +      -
   1495A  PRO*     3.6    34.1    -      -       +      -
   1500A  VAL*     4.2    20.0    -      -       +      -
   1505A  GLY      6.0     1.3    -      -       -      -
   1507A  PRO*     3.8    12.1    -      -       +      -
   1550A  GLU      2.9    19.0    +      -       -      +
   1551A  THR      3.6     4.0    -      -       -      +
   1552A  VAL      3.2     0.2    -      -       -      -
   1553A  SER*     1.3    77.8    -      -       -      +
   1555A  TRP*     1.3    86.3    +      +       -      +
   1557A  SER*     3.4     1.4    +      -       -      -
   1558A  ASN*     3.0    55.3    +      -       -      -
   1676A  HIS*     3.4    30.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with TRP1555 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1489A  LEU      3.5    20.0    -      -       -      -
   1490A  ILE*     3.7    39.7    +      -       +      -
   1493A  LEU*     4.4     8.4    +      -       +      -
   1495A  PRO*     5.1     1.4    -      -       +      +
   1507A  PRO*     4.0    14.8    -      -       +      -
   1511A  LEU*     5.4     4.5    -      -       +      -
   1538A  ILE*     4.0    44.0    -      -       +      -
   1541A  VAL*     3.8    29.3    -      -       +      +
   1542A  LEU*     4.3    13.0    -      -       +      -
   1545A  ARG*     4.8     4.0    -      -       -      +
   1551A  THR*     3.1    28.7    +      -       +      +
   1552A  VAL      4.3     0.2    -      -       -      +
   1554A  PHE*     1.3    96.3    -      +       -      +
   1556A  LEU*     1.3    60.7    +      -       -      +
   1558A  ASN*     3.8    23.1    -      -       +      -
   1559A  THR*     2.8    35.0    +      -       -      -
   1607A  ILE*     4.3     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1556 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1552A  VAL      2.9    18.4    +      -       -      +
   1553A  SER*     3.7     4.7    -      -       -      +
   1555A  TRP*     1.3    78.1    -      -       -      +
   1557A  SER*     1.3    62.4    +      -       -      +
   1559A  THR*     3.8     0.7    -      -       -      -
   1560A  CYS*     3.0    42.9    +      -       -      -
   1604A  ALA*     3.6    29.8    -      -       +      +
   1607A  ILE*     3.6    15.7    -      -       +      +
   1608A  TYR*     4.1    23.3    -      -       +      +
   1611A  LEU*     3.9    27.6    -      -       +      -
   1678A  MET*     3.9     7.4    -      -       +      -
   1682A  LEU*     3.9    22.7    -      -       +      -
   1827A  PHE*     4.3     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1557 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1505A  GLY*     6.0     0.9    -      -       -      -
   1553A  SER      2.8    21.3    +      -       -      -
   1554A  PHE      3.6     4.7    -      -       -      -
   1556A  LEU*     1.3    77.1    -      -       -      +
   1558A  ASN*     1.3    59.7    +      -       -      +
   1560A  CYS*     3.4     5.6    +      -       -      +
   1561A  ARG*     2.9    28.1    +      -       -      +
   1676A  HIS*     3.5    30.9    -      -       -      +
   1677A  GLY      4.6     2.2    -      -       -      +
   1678A  MET*     3.4    39.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1558 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1505A  GLY*     3.3    19.4    -      -       -      +
   1507A  PRO*     3.1    31.2    -      -       -      +
   1508A  ALA*     3.2    20.1    +      -       +      +
   1538A  ILE*     6.1     0.4    -      -       -      -
   1554A  PHE*     3.0    51.3    +      -       -      +
   1555A  TRP*     3.9    20.4    -      -       +      -
   1557A  SER*     1.3    79.8    -      -       -      +
   1559A  THR*     1.3    60.7    +      -       -      +
   1561A  ARG*     4.3     1.1    -      -       -      +
   1562A  PHE*     2.9    30.1    +      -       -      +
   1676A  HIS      4.9     2.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR1559 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1538A  ILE*     3.7    21.6    -      -       -      +
   1555A  TRP*     2.8    24.6    +      -       -      -
   1556A  LEU*     3.8     3.6    -      -       -      -
   1558A  ASN*     1.3    75.0    -      -       -      +
   1560A  CYS*     1.3    62.5    +      -       -      +
   1562A  PHE*     3.3     7.2    +      -       -      +
   1563A  LEU*     3.0    22.2    +      -       +      +
   1600A  LEU*     3.8    39.7    -      -       +      +
   1603A  LEU*     4.3     6.5    -      -       +      +
   1604A  ALA*     4.0    18.2    -      -       +      +
   1607A  ILE*     3.5    14.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS1560 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1556A  LEU*     3.0    25.3    +      -       -      +
   1557A  SER*     3.6     6.3    -      -       -      +
   1559A  THR*     1.3    73.9    -      -       -      +
   1561A  ARG*     1.3    61.5    +      -       -      +
   1563A  LEU*     3.1    11.8    +      -       -      +
   1564A  HIS*     2.9    36.3    +      -       +      +
   1604A  ALA*     4.4     6.1    -      -       -      -
   1679A  ASP*     4.1    18.6    -      -       -      +
   1682A  LEU*     3.9    16.4    -      -       +      -
   1827A  PHE*     3.6    37.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG1561 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1504A  PRO      5.6     1.2    +      -       -      -
   1505A  GLY*     4.3     8.9    -      -       -      +
   1508A  ALA*     3.7    20.9    -      -       +      -
   1509A  TYR*     3.6    33.3    +      -       +      -
   1557A  SER      2.9    18.3    +      -       -      +
   1558A  ASN*     3.3     1.8    +      -       -      -
   1560A  CYS*     1.3    75.6    -      -       -      +
   1562A  PHE*     1.3    63.0    +      -       -      +
   1564A  HIS*     3.2    22.4    +      -       -      +
   1565A  CYS*     2.9    30.2    +      -       -      +
   1568A  GLN*     4.7     2.2    +      -       -      -
   1677A  GLY      5.0     6.7    +      -       -      -
   1679A  ASP*     3.9     6.9    +      -       -      -
   1830A  ASN*     2.8    47.8    +      -       -      +
   1831A  PRO*     4.4     0.6    +      -       -      +
   1832A  SER*     3.6    26.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1562 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1508A  ALA*     3.5    25.7    -      -       +      +
   1511A  LEU*     3.9    12.8    -      -       +      -
   1512A  PHE*     3.7    31.6    -      -       +      -
   1515A  VAL*     4.0     8.3    -      -       +      -
   1530A  LEU*     6.4     0.2    -      -       +      -
   1531A  LEU*     3.7    22.0    -      -       +      -
   1534A  THR*     4.1    18.2    -      -       +      -
   1538A  ILE*     6.1     0.9    -      -       +      -
   1558A  ASN      2.9    17.2    +      -       -      +
   1559A  THR*     3.5     6.5    -      -       -      +
   1560A  CYS      3.2     0.2    -      -       -      -
   1561A  ARG*     1.3    77.8    -      -       -      +
   1563A  LEU*     1.3    60.1    +      -       -      +
   1565A  CYS*     3.2     5.1    +      -       -      +
   1566A  LEU*     3.0    39.0    +      -       +      +
   1596A  TYR*     3.8    27.6    -      +       -      -
   1600A  LEU*     3.7    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1563 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1559A  THR      3.0    13.1    +      -       -      +
   1560A  CYS*     3.3    12.8    -      -       -      +
   1562A  PHE*     1.3    77.0    -      -       -      +
   1564A  HIS*     1.3    66.2    +      -       +      +
   1566A  LEU*     3.2     4.1    +      -       -      +
   1567A  LYS*     3.1    46.9    +      -       +      +
   1597A  ARG*     3.8    40.8    -      -       +      +
   1600A  LEU*     3.6    16.0    -      -       +      +
   1601A  SER*     3.3    26.7    -      -       -      +
   1827A  PHE*     4.6    22.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS1564 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1560A  CYS*     2.9    34.8    +      -       +      +
   1561A  ARG*     3.6    27.6    -      -       -      +
   1563A  LEU*     1.3    79.2    -      -       +      +
   1565A  CYS*     1.3    53.6    +      -       -      +
   1567A  LYS*     3.2     3.2    +      -       -      +
   1568A  GLN*     2.8    38.6    +      -       -      +
   1679A  ASP*     2.7    37.3    +      -       -      -
   1827A  PHE*     4.1    11.9    -      -       +      -
   1828A  PRO      3.3    26.0    -      -       -      -
   1829A  PHE*     3.5    17.0    -      -       +      -
   1830A  ASN*     3.3    27.4    +      -       -      +
   1831A  PRO*     5.2     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS1565 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1508A  ALA      4.8     1.1    -      -       -      -
   1509A  TYR*     3.7    38.8    -      -       -      -
   1512A  PHE*     3.8    34.4    -      -       +      -
   1561A  ARG*     2.9    25.0    +      -       -      -
   1562A  PHE*     3.5     9.2    -      -       -      +
   1564A  HIS*     1.3    75.3    -      -       -      +
   1566A  LEU*     1.3    63.7    +      -       -      +
   1568A  GLN*     4.4     4.3    -      -       -      -
   1569A  TYR*     3.0    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1566 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1512A  PHE*     3.9    24.0    -      -       +      -
   1515A  VAL*     4.7     3.4    -      -       +      -
   1531A  LEU*     5.3     0.4    -      -       +      -
   1562A  PHE*     3.0    34.7    +      -       +      +
   1563A  LEU*     3.2     6.5    +      -       -      +
   1565A  CYS*     1.3    77.2    -      -       -      +
   1567A  LYS*     1.3    57.1    +      -       -      +
   1569A  TYR      4.0     0.5    -      -       -      -
   1570A  SER*     3.1    26.5    +      -       -      -
   1588A  LEU*     4.8     3.7    -      -       +      +
   1593A  LEU*     3.7    30.7    -      -       +      +
   1596A  TYR*     4.0    20.2    -      -       +      -
   1597A  ARG*     3.9    24.5    +      -       +      -
   1600A  LEU*     3.6    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS1567 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1563A  LEU*     3.1    40.4    +      -       +      +
   1564A  HIS*     3.6     8.6    +      -       -      +
   1565A  CYS      3.1     0.2    -      -       -      -
   1566A  LEU*     1.3    74.4    -      -       -      +
   1568A  GLN*     1.3    65.2    +      -       -      +
   1569A  TYR      3.1     1.8    -      -       -      -
   1570A  SER*     2.7    23.9    +      -       -      -
   1575A  PHE*     3.2    52.7    -      -       +      +
   1597A  ARG*     3.7    22.0    -      -       -      +
   1601A  SER*     5.3     2.1    +      -       -      -
   1827A  PHE      4.3    15.2    +      -       -      -
   1829A  PHE*     3.8    22.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN1568 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1509A  TYR*     6.1     0.2    -      -       -      -
   1561A  ARG*     4.7     3.5    +      -       -      -
   1564A  HIS      2.8    21.2    +      -       -      +
   1565A  CYS*     4.0     4.7    -      -       -      +
   1567A  LYS*     1.3    74.0    -      -       -      +
   1569A  TYR*     1.3    78.5    +      -       +      +
   1570A  SER      3.8     0.3    +      -       -      -
   1575A  PHE      3.8     5.5    -      -       -      +
   1576A  MET*     4.2     6.9    -      -       -      +
   1578A  HIS      5.4     1.0    +      -       -      -
   1579A  ASN*     2.9    51.8    +      -       -      +
   1583A  GLN*     3.5    12.5    +      -       -      +
   1587A  CYS*     4.2     1.6    -      -       -      -
   1829A  PHE*     3.8    13.7    -      -       +      -
   1831A  PRO*     3.5    14.1    -      -       +      +
   1832A  SER*     2.9    50.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR1569 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1509A  TYR*     5.7     2.2    -      +       -      -
   1512A  PHE*     3.3    33.9    -      +       +      -
   1565A  CYS*     3.0    29.0    +      -       -      +
   1566A  LEU      4.0     3.1    -      -       -      -
   1568A  GLN*     1.3   102.6    +      -       +      +
   1570A  SER*     1.3    57.8    +      -       -      +
   1571A  GLY      3.3     2.2    -      -       -      -
   1579A  ASN*     5.0     0.2    -      -       -      -
   1583A  GLN*     3.3    61.4    +      -       +      +
   1586A  HIS*     3.8    26.6    +      -       +      +
   1587A  CYS*     3.2     6.9    -      -       -      -
   1588A  LEU*     2.9    30.6    +      -       -      +
   1832A  SER*     4.9     1.3    +      -       -      -
   1834A  LEU      3.6    10.4    +      -       -      -
   1836A  LEU*     3.8    23.8    +      -       +      +
----------------------------------------------------------
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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