Contacts of the helix formed by residues 275 - 304 (chain 9) in PDB entry 6FF7


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 GLY 275 (chain 9).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    2489  ALA*     6.1     2.3    -      -       -      -
    2719  GLY      2.7    19.1    +      -       -      -
    2729  LEU*     5.1     0.4    -      -       -      -
    2749  CYS*     1.3    72.4    -      -       -      +
    2769  GLY*     1.3    63.0    +      -       -      +
    2779  THR      3.5     1.6    -      -       -      -
    2789  LEU*     3.9    11.8    -      -       -      +
    2799  GLU*     3.0    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 276 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    2729  LEU*     3.9    19.7    +      -       -      -
    2739  LYS      4.8     1.0    -      -       -      -
    2749  CYS      3.4     4.2    -      -       -      -
    2759  GLY*     1.3    77.1    -      -       -      +
    2779  THR*     1.3    64.6    +      -       -      +
    2799  GLU*     3.2     6.9    +      -       -      +
    2809  GLU*     2.9    25.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 277 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    2749  CYS      5.0     2.5    +      -       -      -
    2769  GLY*     1.3    74.0    -      -       -      +
    2789  LEU*     1.3    57.7    +      -       -      +
    2809  GLU*     3.4     6.6    +      -       -      +
    2819  ARG*     2.9    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 278 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1839  LYS*     4.8    21.8    -      -       +      +
    1879  GLU*     6.3     2.0    -      -       -      -
    2759  GLY*     3.6    13.6    +      -       -      +
    2769  GLY      3.2     0.8    -      -       -      -
    2779  THR*     1.3    76.2    -      -       -      +
    2799  GLU*     1.3    66.9    +      -       -      +
    2819  ARG*     3.0     6.9    +      -       -      +
    2829  ALA*     2.8    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 279 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    2479  SER*     4.9    22.7    -      -       -      +
    2489  ALA*     5.7     5.4    -      -       +      +
    2759  GLY      3.0    18.5    +      -       -      +
    2769  GLY*     3.6     5.4    -      -       -      +
    2789  LEU*     1.3    75.1    -      -       -      +
    2809  GLU*     1.3    63.2    +      -       -      +
    2829  ALA*     3.2     8.2    +      -       -      +
    2839  GLN*     2.9    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 280 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    2179  PHE*     6.3     4.3    -      -       +      -
    2769  GLY      2.9    16.6    +      -       -      +
    2779  THR*     3.7     7.0    -      -       -      +
    2799  GLU*     1.3    75.5    -      -       -      +
    2819  ARG*     1.3    58.3    +      -       -      +
    2839  GLN*     3.3     8.9    +      -       -      +
    2849  ARG*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 281 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1869  LEU      5.2     1.1    -      -       -      +
    1879  GLU*     4.7    16.2    -      -       +      +
    1909  LEU*     3.4    24.6    -      -       +      +
    2779  THR      2.9    18.2    +      -       -      +
    2789  LEU*     3.0     7.8    +      -       -      +
    2809  GLU*     1.3    72.9    -      -       -      +
    2829  ALA*     1.3    66.2    +      -       -      +
    2849  ARG*     3.3     6.9    +      -       -      +
    2859  LEU*     2.9    19.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 282 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1869  LEU*     5.8    10.0    -      -       +      +
    1909  LEU*     5.5     0.2    -      -       -      -
    2789  LEU      2.8    12.8    +      -       -      +
    2799  GLU*     3.3    12.8    -      -       -      +
    2819  ARG*     1.3    75.4    -      -       -      +
    2839  GLN*     1.3    63.1    +      -       -      +
    2859  LEU*     3.1     9.9    +      -       -      +
    2869  PHE*     2.9    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 283 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    2179  PHE*     5.6    11.0    -      -       +      -
    2219  TRP*     6.0     5.8    -      -       +      -
    2799  GLU      2.9    12.9    +      -       -      +
    2809  GLU*     3.4    12.8    -      -       -      +
    2819  ARG      3.2     0.2    -      -       -      -
    2829  ALA*     1.3    75.8    -      -       -      +
    2849  ARG*     1.3    64.2    +      -       -      +
    2869  PHE*     3.0    11.4    -      -       -      +
    2879  SER*     2.9    23.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 284 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1909  LEU*     5.3     3.8    -      -       +      +
    1949  GLN*     5.7     8.3    -      -       +      -
    2139  ILE*     6.3     3.8    -      -       +      -
    2809  GLU      2.9    13.9    +      -       -      +
    2819  ARG*     3.6    11.9    -      -       -      +
    2829  ALA      3.3     0.2    -      -       -      -
    2839  GLN*     1.3    76.3    -      -       -      +
    2859  LEU*     1.3    62.6    +      -       -      +
    2879  SER*     3.2     3.9    +      -       -      +
    3019  PHE*     2.9    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 285 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1709  LEU*     4.9     6.9    -      -       +      +
    1869  LEU      5.3     0.9    -      -       -      +
    1899  LEU*     6.4     0.4    -      -       +      -
    1909  LEU*     3.9    25.2    -      -       +      +
    1939  LEU*     5.3     6.1    -      -       +      +
    2819  ARG      2.9    12.9    +      -       -      +
    2829  ALA*     3.2    12.3    -      -       -      +
    2849  ARG*     1.3    74.0    -      -       -      +
    2869  PHE*     1.3    63.3    +      -       -      +
    3019  PHE*     4.3     2.9    -      -       -      +
    3029  ALA*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 286 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1709  LEU*     3.5    28.0    -      -       +      +
    1729  ASP      5.4     4.5    -      -       -      +
    2829  ALA      2.9    11.8    +      -       -      +
    2839  GLN*     3.0    15.9    +      -       -      +
    2859  LEU*     1.3    78.4    -      -       -      +
    2879  SER*     1.3    56.8    +      -       -      +
    3039  LYS*     2.9    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 287 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    2139  ILE*     5.5    11.2    -      -       -      -
    2839  GLN      2.9    15.4    +      -       -      -
    2849  ARG*     4.2     4.3    -      -       -      -
    2869  PHE*     1.3    74.6    -      -       -      +
    3019  PHE*     1.3    59.0    +      -       -      +
    3039  LYS*     3.3     9.6    +      -       -      +
    3049  ASN*     2.9    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 301 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1909  LEU      6.0     0.2    -      -       -      +
    1939  LEU*     4.8    10.5    -      -       +      +
    1949  GLN*     4.7    24.5    -      -       +      +
    1979  THR*     4.9    10.2    -      -       -      -
    2849  ARG*     2.9    18.1    +      -       +      +
    2859  LEU*     4.3     1.3    -      -       -      +
    2879  SER*     1.3    74.8    -      -       -      +
    3029  ALA*     1.3    66.1    +      -       -      +
    3049  ASN*     3.3     8.5    +      -       -      +
    3059  PRO*     3.1    24.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 302 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1679  PHE      6.0     0.2    -      -       -      +
    1709  LEU*     4.4    17.7    -      -       +      +
    1719  PHE*     5.4     4.5    -      -       +      +
    1939  LEU*     5.5     5.8    -      -       +      +
    2859  LEU      2.9    22.1    +      -       -      +
    2869  PHE      3.7     3.6    -      -       -      +
    3019  PHE*     1.3    73.5    -      -       -      +
    3039  LYS*     1.3    66.7    -      -       -      +
    3059  PRO*     3.1    15.6    -      -       -      +
    3069  LYS*     3.1    13.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 303 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1709  LEU      5.0     0.6    +      -       -      -
    1719  PHE*     5.0    17.5    -      -       -      +
    2869  PHE      2.9    13.7    +      -       -      +
    2879  SER*     3.4    12.8    -      -       -      +
    3029  ALA*     1.3    76.8    -      -       -      +
    3049  ASN*     1.3    61.4    +      -       -      +
    3059  PRO      3.1     1.2    -      -       -      -
    3069  LYS*     3.2    19.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 304 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1979  THR*     6.2     2.5    -      -       -      -
    2879  SER      2.9    16.7    +      -       -      +
    3019  PHE*     3.3     9.6    +      -       -      +
    3039  LYS*     1.3    74.9    -      -       -      +
    3059  PRO*     1.3    57.6    -      -       +      +
    3069  LYS      3.5     0.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 305 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1979  THR*     5.8     7.4    -      -       -      -
    3019  PHE      3.1    15.2    -      -       -      +
    3029  ALA*     3.1     9.1    -      -       -      +
    3039  LYS      3.0     1.0    -      -       -      -
    3049  ASN*     1.3    78.8    -      -       -      +
    3069  LYS*     1.3    64.6    +      -       -      -
    3079  SER      3.1     3.4    -      -       -      -
    3089  LYS*     2.8    25.5    +      -       +      +
    3099  GLY*     2.9    10.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 306 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1719  PHE*     6.3     2.7    -      -       +      -
    3029  ALA      3.1     8.8    +      -       -      +
    3039  LYS*     3.2    15.8    +      -       -      +
    3049  ASN      3.5     1.4    +      -       -      -
    3059  PRO*     1.3    76.0    -      -       -      +
    3079  SER*     1.3    58.1    +      -       -      +
    3099  GLY*     3.3     2.7    +      -       -      +
    3109  THR*     2.9    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 307 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    3049  ASN      5.4     0.4    +      -       -      -
    3059  PRO      3.0     1.7    +      -       -      -
    3069  LYS*     1.3    78.9    -      -       -      +
    3089  LYS*     1.3    56.9    +      -       -      +
    3109  THR*     3.6     5.5    +      -       -      -
    3119  LYS*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 308 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1379  GLY      4.7     9.4    -      -       -      +
    1389  ARG      4.5    11.8    -      -       -      +
    1399  TYR*     5.0     1.4    -      -       -      -
    1409  LEU*     5.1    10.7    +      -       +      +
    3059  PRO*     2.8    18.2    +      -       +      +
    3079  SER*     1.3    75.8    -      -       -      +
    3099  GLY*     1.3    67.0    +      -       -      +
    3119  LYS*     3.3     7.2    +      -       -      +
    3129  ARG*     2.9    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 309 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1409  LEU*     6.5     0.4    -      -       -      -
    3059  PRO*     2.9    12.1    +      -       -      +
    3069  LYS*     3.7     3.8    -      -       -      -
    3089  LYS*     1.3    78.1    -      -       -      +
    3109  THR*     1.3    60.6    +      -       -      +
    3129  ARG*     3.2     4.8    +      -       -      +
    3139  ASP*     2.9    24.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 310 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    3069  LYS      2.9    16.7    +      -       -      -
    3079  SER*     3.8     6.3    -      -       -      -
    3099  GLY*     1.3    73.1    -      -       -      +
    3119  LYS*     1.3    65.0    +      -       -      +
    3139  ASP*     3.2     7.2    +      -       -      +
    3149  THR*     2.9    25.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 311 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1389  ARG      4.0    16.4    -      -       -      +
    1399  TYR*     5.8     0.2    -      -       -      -
    3079  SER      2.9    20.1    +      -       -      +
    3089  LYS*     3.3     6.7    +      -       -      +
    3109  THR*     1.3    77.0    -      -       -      +
    3129  ARG*     1.3    57.5    +      -       -      +
    3149  THR*     3.3     8.1    -      -       -      -
    3159  GLU*     3.0    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 312 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1389  ARG      5.0     0.6    +      -       -      -
    1399  TYR*     4.3     8.7    -      -       +      -
    1409  LEU*     4.2    29.4    -      -       +      +
    3089  LYS      2.9    17.1    +      -       -      +
    3099  GLY*     3.7     5.2    -      -       -      +
    3119  LYS*     1.3    73.0    -      -       -      +
    3139  ASP*     1.3    67.1    +      -       -      +
    3159  GLU*     2.7    20.2    +      -       -      +
    3169  ARG*     2.8    13.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 313 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1649  LEU*     5.2    15.7    -      -       +      -
    3099  GLY      2.9    16.7    +      -       -      +
    3109  THR*     3.7     7.4    -      -       -      +
    3129  ARG*     1.3    75.7    -      -       -      +
    3149  THR*     1.3    63.7    +      -       -      +
    3169  ARG*     3.2     9.5    +      -       -      +
    3179  ASN*     3.0    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 314 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    3109  THR      2.9    13.2    +      -       -      -
    3119  LYS*     3.3    12.6    -      -       -      -
    3139  ASP*     1.3    75.6    -      -       -      +
    3159  GLU*     1.3    64.0    +      -       -      +
    3179  ASN*     3.0     8.6    +      -       -      +
    3189  LYS*     2.9    22.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 315 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1399  TYR*     5.5     0.4    -      -       +      -
    3119  LYS      3.0    12.5    +      -       -      +
    3129  ARG*     2.7    19.0    +      -       -      +
    3149  THR*     1.3    70.0    -      -       -      +
    3169  ARG*     1.3    64.6    +      -       -      +
    3189  LYS*     3.1     8.4    +      -       -      +
    3199  ASP*     2.9    26.0    +      -       -      +
     93h  ASP*     6.0     3.4    -      -       +      -
     94h  ARG*     5.8     3.1    -      -       -      +
     95h  TYR*     5.0    20.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 316 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1609  TYR*     6.1     5.6    -      -       +      -
    1619  ILE*     6.4     3.1    -      -       +      -
    3129  ARG      2.8    13.3    +      -       -      +
    3139  ASP*     3.3    13.2    -      -       -      +
    3159  GLU*     1.3    73.0    -      -       -      +
    3179  ASN*     1.3    62.7    +      -       -      +
    3199  ASP*     3.4     4.5    +      -       -      +
    3209  ILE*     2.9    25.7    +      -       -      +
     93h  ASP*     6.1     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 317 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    3139  ASP      3.0    12.4    +      -       -      +
    3149  THR*     3.6     9.6    -      -       -      +
    3169  ARG*     1.3    76.2    -      -       -      +
    3189  LYS*     1.3    63.2    +      -       -      +
    3209  ILE*     3.3     8.3    +      -       -      +
    3219  ALA*     3.0    24.8    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il