Contacts of the helix formed by residues 49 - 70 (chain Z) in PDB entry 5A0Q


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ALA 49 (chain Z).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31Z  VAL*     6.5     0.2    -      -       +      -
     45Z  MET*     3.5    23.7    -      -       +      +
     47Z  GLY      3.5     1.4    +      -       -      -
     48Z  GLY*     1.3    73.6    -      -       -      +
     50Z  ALA*     1.4    62.3    +      -       -      +
     51Z  ASP      3.4     0.2    +      -       -      -
     52Z  CYS      3.6     0.3    +      -       -      -
     53Z  SER*     3.6     6.6    +      -       -      -
    300Z  KNM      3.2    71.1    +      -       +      +
    125a  ASP*     5.9     0.7    -      -       -      +
    129a  SER*     5.3     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 50 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48Z  GLY      3.4     0.2    -      -       -      -
     49Z  ALA*     1.4    75.4    -      -       -      +
     51Z  ASP*     1.3    62.2    +      -       -      +
     53Z  SER*     2.9    17.6    +      -       -      -
     54Z  PHE      3.1     4.3    +      -       -      -
    300Z  KNM      5.5     0.6    +      -       -      -
     97a  TYR*     1.8    51.9    +      -       +      +
    100a  ARG*     3.2    18.8    -      -       -      +
    125a  ASP*     5.1     1.5    +      -       -      +
    127a  VAL*     3.6    13.9    -      -       +      +
    128a  GLY      3.4    20.2    -      -       -      +
    129a  SER*     5.7     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 51 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48Z  GLY*     3.6    19.4    -      -       -      +
     49Z  ALA      3.3     0.6    -      -       -      -
     50Z  ALA*     1.3    77.8    -      -       -      +
     52Z  CYS*     1.3    57.1    +      -       -      +
     54Z  PHE*     3.7     0.7    -      -       -      +
     55Z  TRP*     2.7    51.9    +      -       +      +
     94Z  GLY      4.8     1.6    -      -       -      +
     95Z  LEU*     3.4    29.7    -      -       -      +
     96Z  SER      3.3    21.1    +      -       -      +
     97Z  MET*     3.7     8.5    -      -       +      -
     97a  TYR*     3.8     5.0    -      -       -      -
    100a  ARG*     3.1    26.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 52 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44Z  THR      4.2     0.7    -      -       -      +
     45Z  MET*     3.6    36.8    -      -       +      -
     46Z  ALA      3.0    32.1    -      -       -      -
     48Z  GLY      3.1    14.8    -      -       -      -
     49Z  ALA      3.6     0.2    +      -       -      -
     50Z  ALA      3.3     0.2    -      -       -      -
     51Z  ASP*     1.3    73.3    -      -       -      +
     53Z  SER*     1.4    65.4    +      -       -      +
     55Z  TRP*     4.6     0.7    -      -       -      -
     56Z  GLU*     2.8    40.5    +      -       -      +
     97Z  MET*     3.6    20.6    -      -       -      -
     99Z  THR*     5.7     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 53 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35Z  ILE*     4.7    12.1    -      -       -      +
     45Z  MET*     4.0    12.0    -      -       -      +
     49Z  ALA      3.6     7.9    +      -       -      -
     50Z  ALA*     2.9    24.0    +      -       -      -
     52Z  CYS*     1.4    77.3    -      -       -      +
     54Z  PHE*     1.3    55.0    +      -       -      +
     56Z  GLU*     3.6     3.2    -      -       -      +
     57Z  ARG*     2.8    45.0    +      -       -      +
     93a  SER*     6.0     0.9    -      -       -      -
     97a  TYR*     3.8     5.0    +      -       -      -
    128a  GLY      4.4     5.9    +      -       -      -
    130a  TYR*     5.3    14.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 54 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101S  PHE*     3.6    31.4    -      +       -      -
     50Z  ALA      3.1    13.6    +      -       -      +
     51Z  ASP*     3.7     3.4    -      -       -      +
     53Z  SER*     1.3    78.3    +      -       -      +
     55Z  TRP*     1.3    88.6    +      +       +      +
     57Z  ARG*     3.2    10.5    +      -       -      +
     58Z  LEU*     3.0    51.3    +      -       +      +
     93a  SER      5.6     0.2    -      -       -      -
     94a  THR*     4.1    16.8    -      -       +      -
     97a  TYR*     3.7    52.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with TRP 55 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51Z  ASP*     2.7    34.6    +      -       -      +
     52Z  CYS*     4.3     1.3    -      -       -      +
     54Z  PHE*     1.3   103.5    -      +       +      +
     56Z  GLU*     1.3    61.1    +      -       +      +
     58Z  LEU*     3.2    20.0    +      -       +      +
     59Z  LEU*     2.8    27.2    +      -       -      +
     83Z  LEU*     4.8    13.8    -      -       +      +
     86Z  MET*     5.2    12.1    -      -       +      +
     87Z  VAL*     4.7     7.4    -      -       +      -
     90Z  TYR*     3.9    31.9    -      +       -      -
     95Z  LEU*     2.4    39.9    -      -       +      +
     97Z  MET*     2.8    47.5    -      -       +      +
     97a  TYR*     6.1     3.1    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLU 56 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35Z  ILE*     3.3    35.1    -      -       +      +
     36Z  GLU      4.7     1.7    -      -       -      +
     37Z  ILE*     3.8     9.9    -      -       +      +
     43Z  GLY*     3.2     8.5    -      -       -      -
     44Z  THR      2.6    44.2    +      -       -      +
     52Z  CYS*     2.8    29.1    +      -       -      +
     53Z  SER      3.6     2.0    -      -       -      +
     55Z  TRP*     1.3    76.7    -      -       +      +
     57Z  ARG*     1.4    58.6    +      -       -      +
     59Z  LEU*     3.6    16.4    -      -       +      +
     60Z  ALA*     3.0    25.8    +      -       -      +
     83Z  LEU*     5.4     2.9    -      -       +      -
     97Z  MET*     6.5     0.2    -      -       -      -
     99Z  THR*     3.0    19.1    +      -       -      +
    101Z  ILE*     5.5     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 57 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100S  TRP*     3.1    47.4    +      -       +      -
    101S  PHE*     3.0    53.0    +      -       +      -
    104S  ASN*     4.0     8.1    -      -       -      +
     35Z  ILE*     6.1     3.6    -      -       +      -
     53Z  SER*     2.8    28.2    +      -       -      +
     54Z  PHE*     3.2    11.0    +      -       -      +
     56Z  GLU*     1.4    73.2    -      -       -      +
     58Z  LEU*     1.4    60.9    +      -       -      +
     59Z  LEU      3.2     0.2    -      -       -      -
     60Z  ALA*     3.4     5.3    +      -       -      +
     61Z  ARG*     3.0    28.6    +      -       -      +
     90a  ALA*     3.8    27.9    +      -       -      +
     93a  SER*     5.3     5.2    -      -       -      -
     94a  THR*     4.7     6.5    -      -       -      +
    130a  TYR*     3.3    27.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 58 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101S  PHE*     3.6    19.5    -      -       +      -
     54Z  PHE*     3.0    59.0    +      -       +      +
     55Z  TRP*     3.5    20.9    -      -       +      +
     57Z  ARG*     1.4    73.3    -      -       -      +
     59Z  LEU*     1.3    58.7    +      -       -      +
     61Z  ARG*     3.4    19.7    +      -       -      +
     62Z  GLN*     2.9    37.4    +      -       -      +
     86Z  MET*     4.5    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 59 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37Z  ILE*     4.5    18.2    -      -       +      -
     55Z  TRP      2.8    16.7    +      -       -      +
     56Z  GLU*     3.8    14.1    -      -       +      +
     58Z  LEU*     1.3    77.9    -      -       -      +
     60Z  ALA*     1.4    55.8    +      -       -      +
     62Z  GLN*     3.3     5.5    +      -       +      +
     63Z  CYS*     2.9    45.1    +      -       -      -
     79Z  ALA      3.8    11.0    -      -       -      +
     82Z  LEU*     4.4     9.2    -      -       +      +
     83Z  LEU*     3.7    59.5    -      -       +      +
     86Z  MET*     5.3     7.6    -      -       -      -
    101Z  ILE*     4.0    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 60 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100S  TRP*     5.0    14.4    -      -       +      -
     36Z  GLU      4.4     4.3    -      -       -      +
     37Z  ILE*     4.2    33.2    -      -       +      +
     56Z  GLU      3.0    19.3    +      -       -      +
     57Z  ARG*     3.4     8.5    +      -       -      +
     59Z  LEU*     1.4    75.1    -      -       -      +
     61Z  ARG*     1.4    57.2    +      -       -      +
     63Z  CYS*     3.6     3.5    +      -       -      +
     64Z  ARG*     3.0    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 61 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94S  VAL      5.4     0.4    -      -       -      -
     97S  GLN*     3.7    32.9    -      -       +      +
     98S  ASN*     3.6    26.8    +      -       -      +
    100S  TRP*     6.0     4.4    -      -       +      -
    101S  PHE*     3.5    54.7    -      -       +      +
     57Z  ARG      3.0    16.5    +      -       -      +
     58Z  LEU*     3.5    22.3    -      -       -      +
     60Z  ALA*     1.4    75.9    -      -       -      +
     62Z  GLN*     1.3    70.0    +      -       -      +
     64Z  ARG*     3.1     7.2    +      -       -      +
     65Z  ILE*     2.9    46.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 62 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58Z  LEU*     2.9    23.7    +      -       +      +
     59Z  LEU*     4.0     6.3    -      -       +      +
     61Z  ARG*     1.3    94.1    -      -       -      +
     63Z  CYS*     1.3    63.6    +      -       -      +
     65Z  ILE*     4.0    22.6    -      -       -      +
     66Z  TYR*     3.1    23.9    +      -       -      +
     69Z  ARG*     5.1     4.9    +      -       -      -
     82Z  LEU*     4.5    21.6    -      -       +      +
     86Z  MET*     4.0    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 63 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37Z  ILE*     4.0    27.6    -      -       +      +
     38Z  ASN*     5.4     2.7    -      -       -      +
     59Z  LEU*     2.9    38.0    +      -       -      +
     60Z  ALA*     3.9     6.3    -      -       -      +
     62Z  GLN*     1.3    75.5    -      -       -      +
     64Z  ARG*     1.3    56.9    +      -       -      +
     66Z  TYR*     3.5     4.2    +      -       -      +
     67Z  GLU*     2.9    34.1    +      -       -      +
     74Z  ILE*     3.8    43.7    -      -       +      +
     79Z  ALA*     4.6     4.0    -      -       -      -
     82Z  LEU*     6.0     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 64 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71S  ASP*     3.4    17.9    +      -       -      +
     72S  ALA*     3.0    40.8    -      -       -      +
     73S  HIS*     5.3     0.2    +      -       -      -
     97S  GLN*     3.2    37.0    +      -       -      +
    100S  TRP*     4.5    19.2    -      -       -      +
    106S  THR*     5.1     8.9    -      -       -      +
     60Z  ALA      3.0    19.1    +      -       -      +
     61Z  ARG      3.5     4.9    -      -       -      +
     63Z  CYS*     1.3    74.6    -      -       -      +
     65Z  ILE*     1.3    63.1    +      -       -      +
     67Z  GLU*     3.3    21.6    +      -       -      +
     68Z  LEU*     3.2    35.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 65 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93S  ARG*     4.7     7.6    -      -       +      +
     94S  VAL*     4.3    27.4    -      -       +      +
     97S  GLN*     3.6    22.7    -      -       +      -
     61Z  ARG*     2.9    39.5    +      -       +      +
     62Z  GLN*     4.0    21.5    -      -       -      +
     64Z  ARG*     1.3    75.0    -      -       -      +
     66Z  TYR*     1.3    62.7    +      -       -      +
     68Z  LEU*     3.5     6.8    +      -       +      +
     69Z  ARG*     3.1    63.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 66 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94R  HIS*     5.0     4.0    +      -       -      -
     98R  VAL*     3.8    34.3    -      -       +      +
    106R  TYR*     6.0     3.1    -      +       -      -
     62Z  GLN      3.1    18.3    +      -       -      +
     63Z  CYS*     3.5     5.8    -      -       -      +
     65Z  ILE*     1.3    76.7    -      -       -      +
     67Z  GLU*     1.3    64.7    +      -       -      +
     69Z  ARG*     4.5     9.4    -      -       -      +
     70Z  ASN*     2.9    64.9    +      -       +      +
     72Z  GLU*     4.0     6.2    +      -       -      -
     73Z  ARG      3.6    25.6    +      -       -      -
     74Z  ILE*     3.6    34.1    -      -       +      -
     75Z  SER      5.4     0.3    +      -       -      -
     78Z  ALA*     5.3     1.8    -      -       +      +
     82Z  LEU*     5.5     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 67 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69S  GLU*     4.0     4.7    -      -       -      +
     37Z  ILE      5.5     2.8    -      -       -      +
     38Z  ASN*     4.5    15.7    +      -       -      +
     39Z  PRO*     6.1     0.7    -      -       -      +
     40Z  TYR*     5.5     4.4    +      -       -      +
     63Z  CYS*     2.9    15.7    +      -       -      +
     64Z  ARG*     3.4    35.9    +      -       -      +
     66Z  TYR*     1.3    78.6    -      -       +      +
     68Z  LEU*     1.4    72.2    +      -       +      +
     71Z  LYS*     3.4    18.5    -      -       -      -
     72Z  GLU      3.4    21.4    +      -       -      +
     73Z  ARG*     5.2     4.3    -      -       -      -
     74Z  ILE*     5.3     2.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 68 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69S  GLU*     3.5    35.1    -      -       +      +
     70S  ILE      3.3    26.9    -      -       -      +
     71S  ASP*     4.9     4.5    -      -       -      -
     72S  ALA*     5.4     0.7    -      -       -      +
     93S  ARG*     3.0    45.8    +      -       +      +
     97S  GLN*     4.3     8.3    -      -       +      +
     64Z  ARG*     3.2    39.2    +      -       +      +
     65Z  ILE*     3.7     7.0    -      -       -      +
     66Z  TYR      3.2     0.4    -      -       -      -
     67Z  GLU*     1.4    85.5    -      -       +      +
     69Z  ARG*     1.3    61.9    +      -       -      +
     71Z  LYS*     3.4    14.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 69 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106R  TYR*     5.6     5.4    +      -       +      -
    109R  ARG*     3.2    21.0    +      -       -      +
     90S  ASP*     3.5    36.1    -      -       -      +
     93S  ARG*     4.1    16.9    +      -       -      +
     94S  VAL*     4.8    10.9    -      -       -      +
     62Z  GLN*     5.1     5.5    +      -       -      -
     65Z  ILE*     3.1    44.7    +      -       +      +
     66Z  TYR*     4.3     6.9    -      -       -      +
     68Z  LEU*     1.3    75.5    -      -       -      +
     70Z  ASN*     1.3    63.9    +      -       -      +
     71Z  LYS*     3.1    11.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 70 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94R  HIS*     5.1     4.4    +      -       -      -
    103R  THR*     5.0     7.8    -      -       -      +
    106R  TYR*     3.8    18.4    -      -       +      +
    109R  ARG*     3.6    31.7    +      -       -      +
     66Z  TYR*     2.9    52.0    +      -       +      +
     69Z  ARG*     1.3    77.2    -      -       -      +
     71Z  LYS*     1.4    63.7    +      -       -      +
     72Z  GLU*     3.1    33.6    -      -       -      +
----------------------------------------------------------
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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