Contacts of the helix formed by residues 1493 - 1519 (chain C) in PDB entry 3B13


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 SER1493 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1462C  MET      4.4     0.4    -      -       -      -
   1463C  TRP*     3.3    25.5    -      -       -      -
   1491C  THR      4.0     0.6    +      -       -      -
   1492C  ILE*     1.3    74.1    -      -       -      +
   1494C  PRO*     1.3    77.5    -      -       -      +
   1495C  LEU*     3.9     7.5    +      -       -      +
   1496C  GLU*     3.0    35.1    +      -       -      +
   1497C  ASN*     2.9    20.3    +      -       -      +
   1555C  TYR*     5.9     1.1    -      -       -      -
   1562C  ASP*     5.3     4.2    +      -       -      -
   1565C  LYS*     4.4     4.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PRO1494 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1459C  PHE      3.5    22.2    -      -       -      +
   1460C  ALA      3.4    20.2    -      -       -      +
   1461C  SER      4.2     0.2    -      -       -      -
   1462C  MET      3.4    27.8    -      -       -      +
   1463C  TRP*     3.4    33.0    -      -       +      +
   1493C  SER*     1.3    85.6    -      -       -      +
   1495C  LEU*     1.3    56.8    +      -       -      +
   1497C  ASN*     3.2     4.9    +      -       +      +
   1498C  ALA*     2.9    28.4    +      -       -      +
   1546C  TYR*     5.4     0.5    -      -       -      -
   1550C  PHE*     3.7    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1495 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1493C  SER*     3.1     7.2    +      -       -      +
   1494C  PRO*     1.3    78.2    -      -       -      +
   1496C  GLU*     1.3    64.8    +      -       +      +
   1498C  ALA*     3.0     6.1    +      -       -      +
   1499C  ILE*     2.9    33.3    +      -       +      +
   1550C  PHE*     3.7    23.6    -      -       +      -
   1555C  TYR*     3.6    26.5    -      -       +      +
   1562C  ASP*     4.0    15.5    -      -       +      +
   1565C  LYS*     3.9    27.6    -      -       +      +
   1566C  LEU*     3.7    24.0    -      -       +      -
   1569C  LEU*     3.7    28.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1496 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1491C  THR      3.9     4.4    -      -       -      +
   1492C  ILE*     3.3    28.7    -      -       +      +
   1493C  SER*     3.0    35.3    +      -       -      +
   1495C  LEU*     1.3    80.4    -      -       -      +
   1497C  ASN*     1.3    56.2    +      -       -      +
   1499C  ILE*     3.1    13.4    -      -       -      +
   1500C  GLU*     3.0    32.1    +      -       -      +
   1565C  LYS*     2.8    36.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN1497 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1459C  PHE*     5.8     1.2    -      -       -      -
   1462C  MET*     3.4    32.7    +      -       -      +
   1464C  ILE*     3.6    26.8    -      -       +      +
   1466C  ARG*     5.1     1.6    +      -       -      -
   1492C  ILE*     3.7    10.5    -      -       +      +
   1493C  SER      2.9    11.9    +      -       -      +
   1494C  PRO*     3.4    12.1    -      -       +      +
   1495C  LEU      3.1     0.2    -      -       -      -
   1496C  GLU*     1.3    73.3    -      -       -      +
   1498C  ALA*     1.3    62.1    +      -       -      +
   1500C  GLU*     3.0    15.9    +      -       -      +
   1501C  THR*     2.9    40.1    +      -       -      -
   1546C  TYR*     5.5     2.2    +      -       -      -
     33D  ILE*     4.7     5.9    -      -       -      +
     34D  PRO      5.2     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1498 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1494C  PRO      2.9    12.7    +      -       -      +
   1495C  LEU      3.0     9.6    +      -       -      +
   1497C  ASN*     1.3    76.6    -      -       -      +
   1499C  ILE*     1.3    62.8    +      -       -      +
   1501C  THR*     3.2     1.9    +      -       -      -
   1502C  MET*     2.9    30.1    +      -       -      +
   1546C  TYR*     3.4    48.1    -      -       +      -
   1550C  PHE*     3.7    11.0    -      -       +      -
   1569C  LEU*     4.3     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1499 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1495C  LEU*     2.9    24.6    +      -       +      +
   1496C  GLU*     3.1    15.0    -      -       -      +
   1498C  ALA*     1.3    76.0    -      -       -      +
   1500C  GLU*     1.3    66.1    +      -       +      +
   1502C  MET*     3.3     2.7    +      -       -      +
   1503C  SER*     2.9    26.6    +      -       -      -
   1565C  LYS*     3.6    32.3    -      -       +      +
   1568C  HIS*     3.6    30.7    -      -       +      +
   1569C  LEU*     3.7    26.0    -      -       +      +
   1572C  LEU*     3.6    13.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1500 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1466C  ARG*     2.7    45.5    +      -       -      -
   1492C  ILE*     4.2    15.8    -      -       -      +
   1496C  GLU*     3.0    18.9    +      -       -      +
   1497C  ASN*     3.0    12.9    +      -       -      +
   1499C  ILE*     1.3    77.1    -      -       +      +
   1501C  THR*     1.3    57.5    +      -       -      +
   1503C  SER*     3.3     6.9    +      -       -      -
   1504C  THR*     2.9    35.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR1501 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1497C  ASN*     2.9    25.5    +      -       -      -
   1498C  ALA      3.5     4.0    -      -       -      -
   1500C  GLU*     1.3    73.1    -      -       -      +
   1502C  MET*     1.3    66.9    +      -       -      +
   1504C  THR*     3.1     8.2    +      -       -      -
   1505C  ALA*     2.9    22.4    +      -       +      +
   1546C  TYR*     3.4    29.2    +      -       +      +
     35D  THR*     3.6    31.3    -      -       +      +
     36D  VAL      5.0     0.7    -      -       -      +
     37D  PHE*     4.9    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET1502 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1498C  ALA      2.9    19.0    +      -       -      +
   1499C  ILE      3.6     4.0    -      -       -      +
   1501C  THR*     1.3    75.2    -      -       -      +
   1503C  SER*     1.3    63.5    +      -       -      +
   1505C  ALA*     3.2     2.8    +      -       -      +
   1506C  ASN*     2.9    30.8    +      -       -      +
   1543C  PHE*     4.1    20.9    -      -       +      -
   1546C  TYR*     3.9    21.5    -      -       +      -
   1569C  LEU*     3.7    20.0    -      -       +      -
   1572C  LEU*     3.9    18.6    -      -       +      -
   1573C  ILE*     4.4    13.0    -      -       -      -
   1576C  GLN*     3.9    15.5    -      -       -      +
     37D  PHE*     3.0    46.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1503 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1499C  ILE*     2.9    19.6    +      -       -      -
   1500C  GLU*     3.4     9.2    -      -       -      -
   1502C  MET*     1.3    77.5    -      -       -      +
   1504C  THR*     1.3    58.0    +      -       -      +
   1506C  ASN*     3.5     4.3    +      -       -      +
   1507C  GLU*     2.9    32.5    +      -       -      +
   1568C  HIS*     5.8     1.2    +      -       -      -
   1572C  LEU*     4.3    19.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR1504 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1500C  GLU*     2.9    15.3    +      -       -      +
   1501C  THR*     3.4    11.6    -      -       -      -
   1503C  SER*     1.3    75.5    -      -       -      +
   1505C  ALA*     1.3    61.0    +      -       -      +
   1507C  GLU*     3.3    10.3    +      -       +      +
   1508C  LYS*     2.9    51.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1505 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1501C  THR*     2.9    13.5    +      -       +      +
   1502C  MET      3.7     6.7    -      -       -      +
   1504C  THR*     1.3    72.7    -      -       -      +
   1506C  ASN*     1.3    68.4    +      -       -      +
   1508C  LYS*     3.1    11.0    +      -       -      +
   1509C  ILE*     3.0    28.7    +      -       -      +
   1534C  ILE*     4.2    13.0    -      -       +      +
   1576C  GLN*     4.0     7.9    -      -       -      +
     37D  PHE*     3.8    30.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN1506 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1502C  MET*     2.9    17.2    +      -       -      +
   1503C  SER*     3.6     6.3    -      -       -      +
   1505C  ALA*     1.3    75.2    -      -       -      +
   1507C  GLU*     1.3    58.8    +      -       -      +
   1509C  ILE*     3.4     6.4    +      -       -      +
   1510C  LEU*     2.9    29.1    +      -       -      +
   1572C  LEU*     3.4    39.2    +      -       -      +
   1575C  TRP*     4.1     4.2    -      -       -      +
   1576C  GLN*     2.9    38.4    +      -       -      +
   1579C  PHE*     3.7    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1507 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1435C  LYS*     3.7    22.2    +      -       -      -
   1503C  SER*     2.9    19.6    +      -       -      +
   1504C  THR*     3.5     9.4    -      -       -      +
   1505C  ALA      3.2     0.2    -      -       -      -
   1506C  ASN*     1.3    78.9    -      -       -      +
   1508C  LYS*     1.3    55.9    +      -       -      +
   1510C  LEU*     3.4    11.1    +      -       +      +
   1511C  MET*     3.0    42.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS1508 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1504C  THR*     2.9    35.2    +      -       +      +
   1505C  ALA*     3.1    11.9    +      -       -      +
   1507C  GLU*     1.3    72.2    -      -       -      +
   1509C  ILE*     1.3    66.7    -      -       -      +
   1511C  MET*     3.2    11.7    +      -       +      +
   1512C  MET*     2.9    27.1    +      -       +      +
   1530C  LEU*     4.2    28.5    -      -       +      +
   1534C  ILE*     6.0     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1509 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1505C  ALA      3.0    23.3    +      -       -      +
   1506C  ASN*     3.6    10.3    -      -       -      +
   1508C  LYS*     1.3    75.9    -      -       -      +
   1510C  LEU*     1.3    65.0    +      -       -      +
   1512C  MET*     3.3     2.8    +      -       -      +
   1513C  ILE*     2.9    34.5    +      -       +      +
   1530C  LEU*     4.0    13.4    -      -       +      +
   1531C  LEU*     4.4    10.3    -      -       +      -
   1534C  ILE*     3.7    26.0    -      -       +      -
   1576C  GLN*     4.3     9.2    -      -       +      +
   1579C  PHE*     3.7    31.6    -      -       +      +
   1580C  LEU*     3.5    33.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1510 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1506C  ASN      2.9    14.7    +      -       -      +
   1507C  GLU*     3.5    10.3    -      -       +      +
   1508C  LYS      3.2     0.2    -      -       -      -
   1509C  ILE*     1.3    76.2    -      -       -      +
   1511C  MET*     1.3    65.5    +      -       +      +
   1513C  ILE*     3.0    20.9    +      -       +      +
   1514C  ASN*     3.0    34.7    +      -       -      +
   1579C  PHE*     3.5    52.3    -      -       +      -
   1622C  MET*     4.3     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET1511 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1428C  ASP*     3.3    31.0    -      -       +      +
   1432C  ASN*     3.8    33.0    -      -       -      +
   1435C  LYS*     4.0    13.2    -      -       -      -
   1507C  GLU*     3.0    33.5    +      -       +      +
   1508C  LYS*     3.2    10.1    +      -       +      +
   1510C  LEU*     1.3    75.5    -      -       +      +
   1512C  MET*     1.3    59.0    +      -       -      +
   1514C  ASN*     3.2     5.2    +      -       -      +
   1515C  GLN*     2.9    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET1512 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1508C  LYS*     2.9    16.9    +      -       +      +
   1509C  ILE      3.6     7.4    -      -       -      +
   1511C  MET*     1.3    75.8    -      -       +      +
   1513C  ILE*     1.3    58.1    +      -       +      +
   1515C  GLN*     3.2    23.0    +      -       -      +
   1516C  TYR*     2.8    65.1    +      -       +      +
   1526C  PRO*     3.9    33.7    -      -       +      +
   1527C  LEU*     4.1    17.5    -      -       +      -
   1530C  LEU*     3.7    27.8    -      -       +      -
   1531C  LEU*     6.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1513 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1509C  ILE*     2.9    30.0    +      -       +      +
   1510C  LEU*     3.0    24.7    +      -       +      +
   1512C  MET*     1.3    75.5    -      -       +      +
   1514C  ASN*     1.3    67.1    +      -       -      +
   1516C  TYR*     3.9     0.4    -      -       -      -
   1517C  GLN*     2.9    50.2    +      -       -      +
   1527C  LEU*     6.0     2.2    -      -       +      -
   1579C  PHE      3.6    23.6    -      -       -      +
   1582C  ALA*     4.1    13.5    -      -       +      -
   1583C  GLY*     4.0    22.0    -      -       -      +
   1586C  ILE*     3.9    13.4    -      -       +      +
   1622C  MET*     4.2     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN1514 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1428C  ASP*     2.9    29.4    +      -       -      +
   1510C  LEU*     3.0    28.3    +      -       -      +
   1511C  MET*     3.4     5.8    -      -       -      +
   1513C  ILE*     1.3    80.0    -      -       -      +
   1515C  GLN*     1.3    57.4    +      -       -      +
   1517C  GLN*     3.8    12.4    -      -       -      +
   1518C  SER*     3.0    37.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1515 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1511C  MET*     2.9    16.1    +      -       -      +
   1512C  MET*     3.2    31.3    +      -       -      +
   1514C  ASN*     1.3    77.8    -      -       -      +
   1516C  TYR*     1.3    60.6    +      -       +      +
   1518C  SER*     3.8     3.9    -      -       -      -
   1519C  ASP*     3.0    23.6    +      -       -      +
   1522C  LEU*     3.5    30.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR1516 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1512C  MET*     2.8    58.1    +      -       +      +
   1513C  ILE*     4.1     1.8    -      -       -      +
   1515C  GLN*     1.3    74.0    -      -       +      +
   1517C  GLN*     1.3    63.5    +      -       -      +
   1518C  SER      3.1     1.6    -      -       -      -
   1519C  ASP      3.2    11.4    +      -       -      +
   1522C  LEU*     3.5    28.4    -      -       +      +
   1523C  PRO      2.5    31.4    +      -       -      -
   1524C  ILE*     4.4     6.7    -      -       +      -
   1526C  PRO*     3.7    19.9    -      -       -      +
   1527C  LEU*     3.7    30.6    +      -       +      -
   1586C  ILE*     4.1    14.6    -      -       +      -
   1590C  ARG*     2.3    54.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1517 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1513C  ILE*     2.9    39.2    +      -       -      +
   1514C  ASN*     3.8    12.5    -      -       -      +
   1516C  TYR*     1.3    75.5    -      -       -      +
   1518C  SER*     1.3    63.4    +      -       -      +
   1520C  GLU*     4.4    12.5    -      -       -      +
   1582C  ALA*     5.8     3.0    -      -       -      +
   1586C  ILE*     3.8    17.1    -      -       +      +
   1590C  ARG*     4.2     3.8    -      -       -      +
   1622C  MET*     6.1     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER1518 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1514C  ASN*     3.0    20.5    +      -       -      +
   1515C  GLN*     3.8     5.2    -      -       -      -
   1517C  GLN*     1.3    79.8    -      -       -      +
   1519C  ASP*     1.3    59.4    +      -       -      +
   1520C  GLU*     4.2     1.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1519 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1515C  GLN      3.0    13.2    +      -       -      +
   1516C  TYR      3.2     6.6    +      -       -      +
   1518C  SER*     1.3    77.7    -      -       -      +
   1520C  GLU*     1.3    60.1    +      -       -      +
   1521C  THR*     2.8    36.8    +      -       -      +
   1522C  LEU*     3.3    35.0    -      -       +      +
   1590C  ARG*     3.1    13.2    +      -       -      -
----------------------------------------------------------
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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