Contacts of the helix formed by residues 299 - 320 (chain A) in PDB entry 1Y8Q


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 MET 299 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  VAL*     4.5     2.2    -      -       -      +
    160A  GLY*     3.5    28.1    +      -       -      +
    161A  TYR*     3.8    51.8    -      -       +      +
    296A  PHE      4.8     5.2    -      -       -      +
    297A  SER*     4.2     1.5    +      -       -      -
    298A  GLU*     1.3    74.8    -      -       -      +
    300A  ALA*     1.3    66.7    +      -       -      +
    301A  PRO*     3.9     9.2    -      -       +      -
    302A  VAL*     3.1    18.6    +      -       +      +
    303A  CYS*     3.0    22.8    +      -       -      -
      7B  LEU*     4.5    15.5    -      -       +      -
     39B  THR*     5.6     2.0    -      -       +      -
    400B  LEU*     5.4     2.0    -      -       +      -
    403B  LEU*     4.4    16.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 300 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  GLU*     4.7     2.1    -      -       -      +
    298A  GLU      3.8     3.0    +      -       -      -
    299A  MET*     1.3    70.3    -      -       -      +
    301A  PRO*     1.3    70.8    -      -       +      +
    303A  CYS*     3.2    10.9    +      -       -      +
    304A  ALA*     3.1    22.2    +      -       -      +
     35B  ASN*     3.9    11.1    -      -       -      +
     38B  LEU*     3.7    42.2    -      -       +      +
     39B  THR*     4.0     9.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 301 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299A  MET*     3.3    13.5    -      -       +      -
    300A  ALA*     1.3    93.4    -      -       +      +
    302A  VAL*     1.3    60.7    +      -       -      +
    304A  ALA*     3.3     5.5    +      -       +      +
    305A  VAL*     3.1    28.0    +      -       -      +
     35B  ASN*     4.7     4.0    -      -       +      +
     39B  THR*     3.5    24.7    -      -       +      +
    396B  GLY*     3.4    27.3    -      -       -      +
    399B  VAL*     3.6    20.6    -      -       +      -
    400B  LEU*     3.9    20.4    -      -       +      -
    403B  LEU*     5.1     3.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 302 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  VAL*     3.6    15.5    -      -       +      -
    160A  GLY      3.5    16.6    -      -       -      +
    161A  TYR*     4.0    12.3    -      -       -      +
    162A  HIS      3.5    26.7    -      -       -      +
    299A  MET*     3.1    21.4    +      -       +      +
    301A  PRO*     1.3    72.6    -      -       -      +
    303A  CYS*     1.3    65.5    +      -       -      +
    305A  VAL*     3.3     4.5    +      -       -      +
    306A  VAL*     3.0    25.6    +      -       +      +
    331A  PHE*     3.9    26.5    -      -       +      -
    400B  LEU*     4.6    14.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 303 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  GLY*     3.8    16.2    -      -       -      +
     47A  LEU*     3.7    31.6    -      -       -      +
     50A  GLU*     3.5    11.2    -      -       +      +
    158A  VAL*     4.0    18.4    -      -       -      -
    298A  GLU*     4.3    16.6    -      -       -      -
    299A  MET      3.0    23.0    +      -       -      -
    300A  ALA*     3.2    10.3    +      -       -      +
    302A  VAL*     1.3    76.5    -      -       -      +
    304A  ALA*     1.3    55.4    +      -       -      +
    307A  GLY*     2.8    31.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 304 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  GLU*     3.8    17.5    -      -       -      +
    300A  ALA      3.1    12.7    +      -       -      +
    301A  PRO      3.4     9.9    -      -       -      +
    302A  VAL      3.1     0.2    -      -       -      -
    303A  CYS*     1.3    75.7    -      -       -      +
    305A  VAL*     1.3    60.4    +      -       -      +
    307A  GLY      3.9     0.3    -      -       -      -
    308A  GLY*     3.0    24.1    +      -       -      -
     34B  LYS*     4.3     2.2    -      -       -      +
     35B  ASN*     3.7    23.3    -      -       -      +
    392B  ALA*     3.8    29.1    -      -       +      +
    396B  GLY*     4.1     2.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 305 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301A  PRO      3.1    15.1    +      -       -      +
    302A  VAL      3.3     5.4    +      -       -      +
    304A  ALA*     1.3    74.0    -      -       -      +
    306A  VAL*     1.3    68.1    +      -       +      +
    308A  GLY*     2.9    12.3    +      -       -      -
    309A  ILE*     3.0    23.8    +      -       +      +
    329A  PHE*     5.0     0.9    -      -       +      -
    331A  PHE*     3.9    42.4    -      -       +      -
    393B  VAL*     3.8    32.7    -      -       +      +
    396B  GLY      4.2     7.0    -      -       -      -
    397B  LEU*     3.9    16.8    -      -       +      -
    400B  LEU*     4.8     0.9    -      -       +      -
    429B  LEU*     4.4    10.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 306 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  LEU*     3.8    19.7    -      -       +      -
    157A  ASP      4.3     2.5    -      -       -      +
    158A  VAL*     4.1     7.4    -      -       +      -
    163A  GLY*     3.7    28.9    -      -       -      -
    164A  TYR      3.8    13.9    -      -       -      +
    165A  THR*     3.7    21.1    -      -       +      +
    302A  VAL*     3.0    15.2    +      -       +      +
    305A  VAL*     1.3    75.7    -      -       -      +
    307A  GLY*     1.3    57.5    +      -       -      +
    309A  ILE*     4.5     5.4    -      -       -      +
    310A  LEU*     2.9    28.3    +      -       +      +
    329A  PHE*     4.7     4.0    -      -       +      -
    331A  PHE*     4.2    20.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 307 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  LEU*     3.4    13.8    -      -       -      +
     50A  GLU*     4.2     5.6    -      -       -      -
     51A  ILE*     3.9    12.9    -      -       -      +
     54A  ASN*     3.2    10.2    +      -       -      -
    303A  CYS      2.8    21.3    +      -       -      -
    304A  ALA      3.9     0.7    -      -       -      -
    306A  VAL*     1.3    78.2    -      -       -      +
    308A  GLY*     1.3    56.8    -      -       -      +
    311A  ALA*     3.1    30.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 308 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  ASN*     3.8     9.4    -      -       -      -
    304A  ALA      3.0    13.0    +      -       -      -
    305A  VAL      2.9     7.3    +      -       -      -
    307A  GLY*     1.3    76.9    -      -       -      +
    309A  ILE*     1.3    63.9    +      -       -      +
    312A  GLN*     3.0    12.2    +      -       -      +
    389B  THR*     2.2    35.4    +      -       -      -
    392B  ALA*     4.7     0.7    -      -       -      -
    393B  VAL*     3.9    11.9    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 309 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  THR*     4.9     1.6    -      -       -      +
    305A  VAL*     3.0    17.6    +      -       +      +
    306A  VAL      4.1     2.2    -      -       -      +
    308A  GLY*     1.3    75.9    -      -       -      +
    310A  LEU*     1.3    64.2    +      -       -      +
    312A  GLN*     3.1    17.9    +      -       -      +
    313A  GLU*     3.0    24.9    +      -       +      +
    325A  HIS*     4.4    13.2    -      -       +      +
    329A  PHE*     3.8    50.9    -      -       +      -
    393B  VAL*     3.6    25.1    -      -       +      -
    418B  LEU*     4.4    16.2    -      -       +      -
    428B  LEU*     4.3    17.3    -      -       +      -
    429B  LEU*     5.7     1.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 310 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  LEU*     4.7     4.0    -      -       +      -
     51A  ILE*     3.6    25.8    -      -       +      -
    130A  CYS*     3.6    18.8    -      -       -      -
    131A  LEU      5.3     0.2    -      -       -      +
    132A  THR*     5.4     0.2    -      -       -      +
    154A  PHE*     3.8    34.5    -      -       +      -
    155A  THR      4.6     1.6    -      -       -      +
    156A  GLY*     4.0    27.8    -      -       -      +
    165A  THR*     3.6    25.3    -      -       +      +
    166A  PHE      4.8     1.3    -      -       -      +
    306A  VAL      2.9    18.0    +      -       -      +
    307A  GLY      4.3     2.0    -      -       -      +
    309A  ILE*     1.3    77.3    -      -       -      +
    311A  ALA*     1.3    62.7    +      -       -      +
    313A  GLU*     3.2     5.9    +      -       +      +
    314A  ILE*     3.0    28.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 311 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51A  ILE*     4.4     9.1    -      -       +      +
     54A  ASN*     3.5    30.1    -      -       +      +
     55A  LEU*     3.9    16.5    -      -       +      +
    307A  GLY      3.1    21.0    +      -       -      +
    308A  GLY      4.1     1.8    -      -       -      +
    310A  LEU*     1.3    76.9    -      -       -      +
    312A  GLN*     1.3    62.1    +      -       -      +
    314A  ILE*     3.2     7.3    +      -       -      +
    315A  VAL*     3.0    28.8    +      -       +      +
    389B  THR*     4.8     2.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 312 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  TRP*     6.3     0.9    -      -       +      -
    308A  GLY      3.0    17.4    +      -       -      +
    309A  ILE*     3.3    19.6    -      -       -      +
    311A  ALA*     1.3    78.2    -      -       -      +
    313A  GLU*     1.3    60.5    +      -       -      +
    315A  VAL*     3.4     7.3    +      -       -      +
    316A  LYS*     3.0    43.9    +      -       +      +
    325A  HIS*     5.2     5.5    -      -       -      -
    144B  TYR*     4.2    30.5    +      -       +      +
    387B  ILE*     4.9     0.2    -      -       +      -
    389B  THR*     2.9    38.7    +      -       +      +
    390B  THR*     3.5    20.0    +      -       -      +
    393B  VAL*     5.3     3.6    -      -       -      +
    418B  LEU*     5.5     4.8    -      -       -      +
    428B  LEU*     5.9     0.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 313 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  PHE*     3.8    17.5    -      -       +      -
    165A  THR*     5.5     4.5    -      -       -      +
    309A  ILE*     3.0    20.2    +      -       +      +
    310A  LEU*     3.6    10.5    -      -       +      +
    312A  GLN*     1.3    75.9    -      -       -      +
    314A  ILE*     1.3    60.9    +      -       -      +
    316A  LYS*     3.2    27.8    +      -       -      +
    317A  ALA*     3.0    30.5    +      -       -      +
    324A  PRO*     3.4    12.2    -      -       +      +
    325A  HIS*     2.7    67.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 314 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  VAL*     4.5     7.2    -      -       +      -
     51A  ILE*     4.3    16.4    -      -       +      -
     55A  LEU*     4.1    16.2    -      -       +      -
    128A  ALA*     4.4    14.6    -      -       +      -
    130A  CYS*     3.9    36.3    -      -       +      -
    154A  PHE*     3.7    26.2    -      -       +      -
    310A  LEU*     3.0    19.4    +      -       +      +
    311A  ALA*     3.2     6.9    +      -       -      +
    313A  GLU*     1.3    78.1    -      -       -      +
    315A  VAL*     1.3    58.2    +      -       -      +
    317A  ALA*     3.5     1.0    +      -       -      +
    318A  LEU*     3.0    54.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 315 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  TRP*     3.9    36.6    -      -       +      -
     34A  LEU*     3.9    26.9    -      -       +      +
     54A  ASN      6.0     0.2    -      -       -      -
     55A  LEU*     4.1    12.1    -      -       +      -
     58A  ALA*     4.0    25.4    -      -       +      -
     60A  VAL*     5.5     0.2    -      -       +      -
    311A  ALA*     3.0    20.1    +      -       +      +
    312A  GLN*     3.8     6.5    -      -       -      +
    313A  GLU      3.3     0.2    -      -       -      -
    314A  ILE*     1.3    74.1    -      -       -      +
    316A  LYS*     1.3    66.0    +      -       +      +
    318A  LEU*     3.8     0.9    -      -       -      +
    319A  SER*     2.8    32.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 316 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  HIS*     4.7     1.5    +      -       -      -
    312A  GLN*     3.0    29.1    +      -       -      +
    313A  GLU*     3.2    35.0    +      -       -      +
    314A  ILE      3.3     0.2    -      -       -      -
    315A  VAL*     1.3    77.0    -      -       +      +
    317A  ALA*     1.3    57.7    +      -       -      +
    319A  SER*     3.0     8.7    +      -       -      -
    320A  GLN*     2.8    26.9    +      -       -      -
    321A  ARG      3.4    19.8    +      -       -      +
    322A  ASP*     4.3    20.1    -      -       +      +
    323A  PRO      3.7    19.4    +      -       -      +
    324A  PRO*     4.6     6.5    -      -       +      -
    325A  HIS*     3.6    16.0    +      -       -      -
    144B  TYR*     4.5    24.0    -      -       +      +
    420B  LYS*     4.1    17.5    +      -       -      +
    421B  GLN*     5.1     1.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 317 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  LYS*     3.6    16.2    +      -       +      -
    154A  PHE*     3.7    22.7    -      -       +      -
    169A  LEU*     3.8    22.2    -      -       +      -
    172A  HIS*     3.3    29.5    -      -       +      -
    313A  GLU      3.0    14.9    +      -       -      +
    314A  ILE      3.8     1.3    -      -       -      +
    316A  LYS*     1.3    78.9    -      -       -      +
    318A  LEU*     1.3    64.1    +      -       +      +
    320A  GLN*     3.3     6.9    +      -       -      +
    324A  PRO*     4.9     1.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 318 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  ARG*     3.9    16.5    -      -       -      +
     34A  LEU*     4.0    19.3    -      -       +      -
     37A  SER*     3.8    29.4    +      -       -      +
     39A  VAL*     3.7    26.5    -      -       +      -
     55A  LEU*     5.8     0.2    -      -       +      -
     60A  VAL*     4.5     3.8    -      -       +      -
    127A  ASP*     4.0    18.6    -      -       +      +
    128A  ALA*     3.7    22.7    -      -       +      -
    152A  LYS*     4.8    10.4    +      -       +      +
    314A  ILE*     3.0    29.3    +      -       +      +
    315A  VAL*     3.9     3.4    -      -       +      +
    317A  ALA*     1.3    78.9    -      -       +      +
    319A  SER*     1.3    60.1    +      -       -      +
    320A  GLN*     3.2     7.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 319 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  TRP*     5.7     3.9    -      -       -      +
     30A  ALA*     3.6    37.1    -      -       -      +
     33A  ARG*     3.4    25.0    +      -       -      -
     34A  LEU*     4.9     4.0    -      -       -      +
    315A  VAL*     2.8    29.9    +      -       -      +
    316A  LYS*     3.0    12.0    +      -       -      -
    318A  LEU*     1.3    74.8    -      -       -      +
    320A  GLN*     1.3    69.6    +      -       -      +
    321A  ARG*     3.2    13.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 320 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  ARG*     3.7    24.8    +      -       -      +
    152A  LYS*     5.0     6.4    -      -       -      +
    172A  HIS*     4.3     8.0    +      -       +      -
    173A  GLU*     3.5    36.1    +      -       -      +
    174A  PHE*     3.7    12.6    -      -       -      -
    175A  VAL*     3.0    27.9    +      -       -      +
    316A  LYS      2.8    10.7    +      -       -      -
    317A  ALA      3.3    13.7    +      -       -      +
    318A  LEU      3.2     5.9    -      -       -      +
    319A  SER*     1.3    80.3    -      -       -      +
    321A  ARG*     1.3    55.5    +      -       -      +
----------------------------------------------------------
 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