Contacts of the helix formed by residues 55 - 77 (chain B) in PDB entry 2CUY


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 LEU 55 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  ARG*     4.1    29.6    -      -       +      +
    184A  VAL      5.1     1.8    -      -       -      +
    185A  VAL*     3.4    33.4    -      -       +      -
     51B  GLU      3.2    16.0    +      -       -      +
     52B  ALA*     3.4    18.2    -      -       +      +
     53B  LEU      3.2     1.5    -      -       -      +
     54B  THR*     1.3    74.5    -      -       -      +
     56B  THR*     1.3    60.4    +      -       -      +
     57B  GLU*     3.2    13.9    -      -       +      +
     58B  ASN*     2.8    33.0    +      -       -      +
     59B  GLN      2.8    10.4    +      -       -      -
    119B  GLN*     5.1    15.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  GLN*     3.6    21.8    -      -       +      +
     54B  THR      3.1     9.4    +      -       -      +
     55B  LEU*     1.3    70.3    -      -       -      +
     57B  GLU*     1.3    59.7    +      -       -      +
     58B  ASN      3.1     0.2    -      -       -      -
     59B  GLN*     4.1     7.2    -      -       -      +
     60B  GLN*     3.1    31.1    +      -       -      +
    115B  GLY*     2.7    32.6    +      -       -      -
    118B  MET*     5.1     0.2    -      -       -      -
    119B  GLN*     3.6    18.2    +      -       -      +
    193B  PHE*     3.6    33.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  ARG*     5.5     5.1    +      -       -      -
     55B  LEU*     3.0    14.2    +      -       +      +
     56B  THR*     1.3    80.6    +      -       -      +
     58B  ASN*     1.3    73.7    +      -       -      +
     61B  PRO*     3.2    11.5    -      -       -      +
    112B  ARG*     3.0    51.2    +      -       +      +
    115B  GLY*     3.8     0.6    -      -       -      -
    116B  ARG*     3.5    53.2    +      -       +      +
    119B  GLN*     5.1     8.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  LEU*     4.1     4.6    -      -       +      +
     44B  LEU*     4.3    22.3    -      -       +      +
     52B  ALA*     2.7    30.1    +      -       -      +
     53B  LEU*     3.9     9.9    -      -       +      +
     55B  LEU*     2.8    21.0    +      -       -      +
     57B  GLU*     1.3    87.0    -      -       -      +
     59B  GLN*     1.3    64.3    +      -       -      +
     61B  PRO*     2.8    20.8    -      -       -      +
     62B  ALA*     3.0    17.9    +      -       -      +
    112B  ARG*     3.0    24.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  GLN*     2.8    23.6    -      -       -      +
     10B  GLY      2.8    28.8    +      -       -      -
     12B  HIS*     3.4    37.7    -      -       +      -
     53B  LEU*     3.1    13.1    +      -       -      +
     54B  THR*     2.6    34.7    +      -       -      +
     55B  LEU      2.8    11.1    +      -       -      +
     56B  THR*     4.1     9.2    -      -       -      +
     58B  ASN*     1.3    78.7    -      -       -      +
     60B  GLN*     1.3    57.4    +      -       +      +
     62B  ALA*     3.7     5.3    -      -       -      +
     63B  LEU*     3.0    39.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  GLN*     2.9    34.0    +      -       +      +
     56B  THR*     3.1    18.6    +      -       -      +
     59B  GLN*     1.3    74.2    -      -       +      +
     61B  PRO*     1.3    70.1    -      -       +      +
     63B  LEU*     3.3     3.3    +      -       +      +
     64B  LEU*     3.0    23.6    +      -       -      +
     90B  LEU*     3.7    29.9    -      -       +      +
    111B  VAL*     3.2    21.3    -      -       +      +
    114B  ARG*     2.7    41.3    +      -       -      +
    115B  GLY*     3.5    14.8    +      -       -      -
    118B  MET*     3.5    13.3    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  LEU*     3.6    22.2    -      -       +      -
     41B  LEU*     4.0     9.6    -      -       +      -
     57B  GLU      3.2    22.7    -      -       -      +
     58B  ASN*     2.8    23.8    -      -       -      +
     60B  GLN*     1.3    88.0    -      -       +      +
     62B  ALA*     1.3    56.2    +      -       -      +
     64B  LEU*     3.2     1.2    +      -       -      +
     65B  ALA*     2.8    31.4    +      -       -      +
    108B  LEU*     3.6    10.9    -      -       +      +
    111B  VAL*     3.7    11.9    -      -       +      -
    112B  ARG*     3.8    27.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  MET*     3.8     9.9    -      -       -      -
     41B  LEU*     3.9     5.3    -      -       +      +
     45B  MET*     3.3    44.7    -      -       +      +
     53B  LEU*     4.0    13.7    -      -       +      -
     58B  ASN      3.0    18.3    +      -       -      +
     59B  GLN*     3.7     4.9    -      -       -      +
     61B  PRO*     1.3    78.5    -      -       -      +
     63B  LEU*     1.3    57.2    +      -       -      +
     65B  ALA*     3.4     0.6    +      -       -      +
     66B  ALA*     3.0    26.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  PRO*     4.5    15.6    -      -       +      +
      8B  GLY*     3.1    36.3    -      -       -      +
      9B  GLN*     3.7     9.9    -      -       +      +
     10B  GLY      4.7     0.2    -      -       -      +
     11B  SER*     3.8     7.2    -      -       -      -
     12B  HIS*     3.7    20.9    -      -       +      +
     16B  MET*     3.7    21.5    -      -       +      -
     59B  GLN*     3.0    35.6    +      -       +      +
     60B  GLN*     3.8     4.7    -      -       -      +
     62B  ALA*     1.3    74.0    -      -       -      +
     64B  LEU*     1.3    61.3    +      -       -      +
     66B  ALA*     3.9     1.5    -      -       +      +
     67B  GLY*     2.9    25.5    +      -       -      -
     90B  LEU*     3.8    14.6    -      -       +      -
     94B  THR*     4.3     1.9    +      -       -      +
    270B  SER*     3.8     9.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 64 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  GLN      3.0    17.2    +      -       -      +
     61B  PRO      3.6     3.1    -      -       -      +
     63B  LEU*     1.3    77.6    -      -       -      +
     65B  ALA*     1.3    57.6    +      -       -      +
     67B  GLY*     3.3     0.5    +      -       -      -
     68B  TYR*     2.9    30.4    +      -       +      +
     90B  LEU*     4.1     3.1    -      -       +      +
     93B  TRP*     3.9    29.4    -      -       +      -
     94B  THR*     3.4    29.1    -      -       -      +
     97B  VAL*     4.5     4.9    -      -       +      -
    104B  LEU*     3.5    29.4    -      -       +      -
    107B  ALA*     3.9    19.5    -      -       +      -
    108B  LEU*     4.0    12.8    -      -       +      -
    111B  VAL*     3.9    20.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  VAL*     3.9     5.7    -      -       +      +
     31B  LEU*     3.9    13.0    -      -       +      +
     34B  ALA*     3.8    28.7    -      -       +      -
     41B  LEU*     4.3     7.4    -      -       +      -
     45B  MET*     4.6     1.3    -      -       +      -
     61B  PRO      2.8    18.0    +      -       -      +
     62B  ALA*     3.7     3.8    -      -       -      +
     64B  LEU*     1.3    81.7    -      -       -      +
     66B  ALA*     1.3    57.6    +      -       -      +
     68B  TYR*     3.6     2.6    +      -       -      -
     69B  ALA*     2.9    31.2    +      -       -      +
    104B  LEU*     5.0     3.6    -      -       -      -
    108B  LEU*     4.2     4.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  MET*     4.1    17.0    -      -       +      -
     17B  GLY*     4.8    13.0    -      -       -      -
     20B  LEU*     5.6     0.3    -      -       -      +
     31B  LEU*     4.2     6.0    -      -       -      +
     45B  MET*     4.2     7.4    -      -       +      -
     62B  ALA      3.0    16.8    +      -       -      +
     63B  LEU*     4.0     2.7    -      -       -      +
     65B  ALA*     1.3    73.6    -      -       -      +
     67B  GLY*     1.3    67.0    +      -       -      +
     69B  ALA*     3.3     6.1    +      -       -      +
     70B  ALA*     3.0    25.6    +      -       -      +
    269B  GLY*     3.5    21.1    -      -       -      +
    270B  SER*     4.8     1.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  PHE*     4.2     2.5    -      -       -      -
      7B  PRO*     5.4     1.1    -      -       -      -
     63B  LEU      2.9    18.5    +      -       -      -
     64B  LEU      3.7     0.9    -      -       -      -
     66B  ALA*     1.3    78.2    -      -       -      +
     68B  TYR*     1.3    61.5    +      -       -      +
     70B  ALA      3.3     0.5    +      -       -      -
     71B  TYR*     3.1    19.4    +      -       -      +
     94B  THR*     4.0    13.2    -      -       -      -
    268B  PHE*     3.5    31.6    -      -       -      +
    269B  GLY*     3.6     1.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  PHE*     5.0     0.7    -      -       -      -
     30B  VAL*     3.6    25.4    -      -       +      -
     33B  ARG*     4.8    10.8    +      -       -      -
     64B  LEU*     2.9    17.9    +      -       +      +
     65B  ALA      4.1     2.2    -      -       -      +
     67B  GLY*     1.3    74.4    -      -       -      +
     69B  ALA*     1.3    57.1    +      -       -      +
     71B  TYR*     3.3     9.2    +      +       -      -
     72B  ARG*     2.9    71.3    +      -       +      +
     94B  THR*     3.8     8.4    -      -       +      +
     97B  VAL*     3.8    28.2    +      -       +      -
     98B  ALA*     3.8    32.1    -      -       +      -
    104B  LEU*     4.0    29.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  LEU*     5.9     1.1    -      -       +      -
     27B  ALA*     3.6    32.7    -      -       +      +
     30B  VAL*     3.8    17.9    -      -       +      +
     31B  LEU*     4.0    13.2    -      -       +      -
     65B  ALA      2.9    19.9    +      -       -      +
     66B  ALA*     3.6     5.6    -      -       -      +
     67B  GLY      3.2     0.2    -      -       -      -
     68B  TYR*     1.3    74.3    -      -       -      +
     70B  ALA*     1.3    59.8    +      -       -      +
     72B  ARG*     3.7     0.5    -      -       -      +
     73B  ALA*     2.9    30.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  LEU*     3.7    23.7    -      -       +      +
     66B  ALA      3.0    11.2    +      -       -      +
     67B  GLY      3.7     1.3    -      -       -      +
     69B  ALA*     1.3    77.7    -      -       -      +
     71B  TYR*     1.3    63.7    +      -       -      +
     73B  ALA*     3.3     3.5    +      -       -      +
     74B  PHE*     3.0    22.7    +      -       -      +
    268B  PHE*     3.8     7.5    -      -       +      -
    269B  GLY*     3.4    20.0    -      -       -      +
    290B  VAL*     3.3    30.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  TYR*     4.1     6.5    -      -       -      -
      4B  ALA*     5.0     1.6    -      -       +      -
      6B  PHE*     4.1    14.6    -      +       +      -
     67B  GLY      3.1    13.8    +      -       -      +
     68B  TYR*     3.5    17.7    -      +       -      +
     70B  ALA*     1.3    77.4    -      -       -      +
     72B  ARG*     1.3    60.7    +      -       -      +
     74B  PHE*     3.1     5.4    +      +       -      +
     75B  LEU*     2.9    64.8    +      -       +      +
     81B  PRO*     3.7     6.6    -      -       -      +
     82B  PRO*     3.2    35.9    -      -       +      +
     98B  ALA*     3.6    36.5    +      -       +      -
    219B  PHE*     3.5    13.5    -      +       -      -
    268B  PHE*     3.6    30.9    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  ALA*     4.0     9.6    -      -       +      +
     30B  VAL*     3.6    25.5    -      -       +      +
     68B  TYR*     2.9    57.3    +      -       +      +
     69B  ALA      3.3     4.2    +      -       -      +
     71B  TYR*     1.3    76.1    -      -       -      +
     73B  ALA*     1.3    66.5    +      -       -      +
     75B  LEU*     3.7    24.1    -      -       -      +
     76B  GLU*     2.9    65.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  LEU*     4.7     5.2    -      -       +      -
     24B  SER*     3.4    30.9    +      -       -      +
     26B  ALA*     3.9     5.8    -      -       -      +
     27B  ALA*     3.9     8.5    -      -       +      -
     69B  ALA      2.9    17.5    +      -       -      +
     70B  ALA*     3.4     9.2    -      -       -      +
     72B  ARG*     1.3    75.9    -      -       -      +
     74B  PHE*     1.3    62.1    -      -       -      +
     76B  GLU*     4.0     1.7    -      -       -      +
     77B  ALA*     3.2    24.3    +      -       -      +
    296B  LEU*     4.2    16.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 74 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  TYR*     3.4    11.4    -      +       -      -
     70B  ALA      3.0    13.3    +      -       -      +
     71B  TYR*     3.3     8.3    -      +       -      +
     73B  ALA*     1.3    74.9    -      -       -      +
     75B  LEU*     1.3    70.5    +      -       +      +
     77B  ALA      3.4     5.5    +      -       -      -
     78B  GLY      3.6     0.5    +      -       -      -
     79B  GLY*     2.8    38.0    +      -       -      -
     80B  LYS      3.3    23.1    -      -       -      -
    266B  LEU*     4.0    13.5    -      -       +      -
    268B  PHE*     3.7    25.1    -      +       +      -
    290B  VAL*     5.3     0.2    -      -       +      -
    296B  LEU*     3.7    15.9    -      -       +      +
    299B  ALA*     4.0    28.9    -      -       +      -
    300B  LEU*     3.5    34.0    -      -       +      +
    303B  GLU*     3.6    16.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 75 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  TYR*     2.9    63.1    +      -       +      +
     72B  ARG*     3.8    26.0    -      -       -      +
     74B  PHE*     1.3    77.7    -      -       +      +
     76B  GLU*     1.3    62.8    +      -       -      +
     78B  GLY*     2.9    21.7    +      -       -      -
     79B  GLY      3.4    20.5    +      -       -      +
     80B  LYS      4.0     3.1    -      -       -      -
     81B  PRO*     3.9    19.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 76 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  ALA*     3.1    29.6    -      -       +      +
     72B  ARG*     2.9    55.5    +      -       -      +
     73B  ALA      4.0     1.8    -      -       -      +
     75B  LEU*     1.3    73.9    -      -       -      +
     77B  ALA*     1.3    57.4    +      -       -      +
     78B  GLY      3.2     3.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 77 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  ALA      3.2    17.6    +      -       -      +
     74B  PHE      3.8     3.6    -      -       -      +
     75B  LEU      3.1     1.4    -      -       -      -
     76B  GLU*     1.3    75.1    -      -       -      +
     78B  GLY*     1.3    57.6    +      -       -      +
     79B  GLY      3.4     1.6    -      -       -      -
    296B  LEU*     5.2     4.0    -      -       +      -
    300B  LEU*     3.6    27.1    -      -       +      -
    304B  ARG*     3.2    24.1    +      -       -      +
----------------------------------------------------------
 Back to top of page


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