Contacts of the helix formed by residues 18 - 40 (chain 9) in PDB entry 6B8H


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 18 (chain 9).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     160  THR      4.5     3.5    +      -       -      -
     170  ILE*     4.5     6.9    -      -       -      +
     190  LEU      5.0     0.7    -      -       -      -
     200  LEU*     3.8    24.3    -      -       -      +
     159  SER      4.1     4.2    +      -       -      -
     169  THR      3.2     1.2    -      -       -      -
     179  ILE*     1.3    78.0    -      -       -      +
     199  LEU*     1.3    62.0    +      -       -      +
     209  LEU      3.2     0.7    -      -       -      -
     219  GLY*     3.2    15.6    +      -       -      -
     229  ALA      4.1     2.1    +      -       -      -
     619  THR      5.5     0.2    -      -       -      +
     629  GLY*     4.9     5.2    -      -       -      -
     659  CYS*     4.1    23.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 19 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     188  GLY      4.8     1.8    -      -       -      -
     618  THR*     4.2    13.0    -      -       -      +
     648  PHE*     3.9    35.0    -      -       +      -
     658  CYS*     3.6    28.5    -      -       -      +
     169  THR*     3.6    22.0    -      -       -      +
     179  ILE      3.0     1.6    +      -       -      -
     189  GLY*     1.3    74.6    -      -       -      +
     209  LEU*     1.3    59.6    +      -       -      +
     229  ALA*     3.2    10.1    +      -       +      +
     239  GLY*     3.0    22.5    +      -       -      -
     629  GLY*     3.3    37.2    -      -       -      +
     659  CYS*     5.0     3.6    -      -       +      +
     669  LEU*     4.3    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 20 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     200  LEU*     4.2    24.2    -      -       +      -
     240  ILE*     5.0     1.6    -      -       +      -
     178  ILE*     4.4     6.7    -      -       +      +
     188  GLY*     3.8    21.5    +      -       -      +
     208  LEU*     4.4    22.2    -      -       +      -
     218  GLY*     3.8    22.4    -      -       -      +
     179  ILE*     3.2    32.9    +      -       +      +
     189  GLY      3.2     1.0    -      -       -      -
     199  LEU*     1.3    75.4    -      -       -      +
     219  GLY*     1.3    64.0    +      -       -      +
     239  GLY*     4.2     0.4    -      -       -      +
     249  ILE*     2.9    51.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 21 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     200  LEU*     3.8    16.3    -      -       -      +
     230  GLY*     3.7     9.7    -      -       -      +
     240  ILE*     3.6    28.6    -      -       -      +
     189  GLY      3.2    10.1    +      -       -      -
     199  LEU      3.1     1.4    -      -       -      -
     209  LEU*     1.3    81.9    -      -       -      +
     229  ALA*     1.3    56.4    +      -       -      +
     249  ILE      3.5     0.2    +      -       -      -
     259  GLY*     2.9    24.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 22 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     230  GLY*     4.7     6.7    -      -       -      -
     618  THR*     4.8     8.1    -      -       +      -
     189  GLY      4.1     2.4    +      -       -      -
     199  LEU*     3.2    11.1    +      -       +      +
     219  GLY*     1.3    74.9    -      -       -      +
     239  GLY*     1.3    59.8    +      -       -      +
     259  GLY      4.4     0.2    -      -       -      +
     269  ILE*     3.0    51.7    +      -       +      +
     589  SER*     3.6    25.1    -      -       -      +
     599  GLU*     4.9     2.5    -      -       -      +
     619  THR*     4.9     0.2    -      -       -      +
     629  GLY*     4.3    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 23 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     218  GLY*     3.1    26.5    -      -       -      +
     228  ALA      4.5     1.6    -      -       -      -
     258  GLY*     3.6     6.6    -      -       -      -
     588  SER*     3.3    16.7    +      -       -      -
     618  THR*     3.7    21.7    +      -       -      -
     199  LEU      3.0    13.7    +      -       -      -
     209  LEU*     3.3     3.9    +      -       -      -
     229  ALA*     1.3    75.8    -      -       -      +
     249  ILE*     1.3    58.4    +      -       -      +
     269  ILE*     4.8     0.7    -      -       -      -
     279  ALA*     4.2     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 24 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     240  ILE*     4.6    18.2    -      -       +      -
     208  LEU*     5.0     1.8    -      -       +      -
     218  GLY*     3.7    21.8    -      -       -      +
     248  ILE*     4.5    23.1    -      -       +      -
     258  GLY*     4.7     3.4    -      -       -      -
     288  ILE*     4.4    14.1    -      -       +      +
     209  LEU*     2.9    38.6    +      -       +      +
     219  GLY      4.1     2.0    -      -       -      +
     239  GLY*     1.3    78.8    -      -       -      +
     259  GLY*     1.3    64.4    +      -       -      +
     269  ILE      3.4     0.7    -      -       -      -
     279  ALA*     3.2     7.8    +      -       -      +
     289  ILE*     3.0    39.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 25 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     230  GLY      4.2     4.3    -      -       -      -
     240  ILE*     4.5     4.2    -      -       -      +
     270  ALA*     3.2    29.8    -      -       -      +
     219  GLY      2.9    17.2    +      -       -      -
     229  ALA      3.9     0.2    -      -       -      -
     249  ILE*     1.3    75.0    -      -       -      +
     269  ILE*     1.3    65.0    +      -       -      +
     289  ILE*     3.0    21.4    +      -       -      -
     299  VAL*     3.0    10.6    +      -       -      +
     589  SER*     5.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 26 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     270  ALA*     5.2     0.2    -      -       -      -
     578  LEU*     4.8     5.8    -      -       +      -
     588  SER*     5.0    10.8    -      -       -      +
     618  THR*     3.7    24.7    -      -       +      +
     229  ALA*     3.0    26.9    +      -       +      +
     239  GLY      5.3     1.6    -      -       -      +
     259  GLY*     1.3    73.9    -      -       -      +
     279  ALA*     1.3    57.6    +      -       -      +
     299  VAL*     3.3     8.6    +      -       -      +
     309  PHE*     2.9    47.3    +      -       +      -
     559  PHE*     3.6    50.3    -      -       +      +
     589  SER*     4.1    17.0    -      -       -      -
     599  GLU*     4.0     7.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 27 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     258  GLY*     3.2    41.1    -      -       -      +
     288  ILE*     4.0     8.4    -      -       +      +
     298  VAL*     3.7    16.3    -      -       +      +
     588  SER*     5.0     3.5    +      -       -      +
     239  GLY      4.2     3.0    +      -       -      +
     249  ILE      3.2    12.2    +      -       -      +
     259  GLY      3.1     0.6    -      -       -      -
     269  ILE*     1.3    79.6    -      -       -      +
     289  ILE*     1.3    60.0    +      -       -      +
     309  PHE*     3.7     1.1    -      -       -      +
     319  ALA*     2.8    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 28 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     240  ILE*     4.6    13.5    -      -       +      -
     270  ALA      4.5     4.9    -      -       -      +
     280  ILE*     4.7    15.7    -      -       +      -
     310  ALA*     3.6    18.1    -      -       +      +
     288  ILE*     4.6    13.5    -      -       +      -
     249  ILE*     3.0    47.5    +      -       +      +
     259  GLY*     3.0    11.7    +      -       -      +
     279  ALA*     1.3    76.5    -      -       -      +
     299  VAL*     1.3    57.9    +      -       -      +
     319  ALA*     3.3     6.5    +      -       +      +
     329  ALA*     3.0    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 29 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     270  ALA*     3.4    33.9    -      -       +      +
     300  PHE*     4.3    11.9    -      -       +      -
     310  ALA*     4.1     6.7    -      -       -      +
     340  ILE*     3.9    10.7    -      -       +      +
     259  GLY      3.0    14.5    +      -       -      +
     269  ILE*     3.6    10.8    -      -       -      +
     279  ALA      3.2     0.2    -      -       -      -
     289  ILE*     1.3    76.0    -      -       -      +
     309  PHE*     1.3    62.0    +      -       +      +
     329  ALA*     3.3     3.8    +      -       -      +
     339  LEU*     2.9    25.6    +      -       -      +
     509  MET      5.0     0.2    -      -       -      +
     519  ALA*     3.9    36.8    -      -       +      +
     549  GLY*     4.9    10.3    -      -       -      -
     559  PHE*     4.9     4.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 30 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     298  VAL*     4.4    14.4    -      -       +      -
     508  MET*     5.1     7.2    -      -       +      +
     538  LEU*     4.8    12.6    -      -       +      -
     548  GLY*     3.5    32.1    -      -       -      -
     578  LEU*     3.8    23.6    -      -       +      -
     269  ILE*     2.9    41.1    +      -       +      +
     279  ALA*     4.1     4.0    -      -       -      +
     299  VAL*     1.3    79.7    -      -       +      +
     319  ALA*     1.3    57.7    +      -       -      +
     339  LEU*     3.3    21.9    -      -       +      +
     349  ILE*     2.9    36.9    +      -       +      +
     489  PHE*     5.8     1.1    -      +       -      -
     519  ALA*     4.2    25.1    -      -       +      -
     529  ILE*     5.3     6.3    -      -       +      -
     559  PHE*     4.2    14.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with ALA 31 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     288  ILE*     3.7    25.1    -      -       +      +
     298  VAL*     5.1     1.7    -      -       -      +
     328  ALA*     3.7    23.3    -      -       +      +
     279  ALA      2.8    18.7    +      -       -      +
     289  ILE*     3.6     6.1    -      -       +      +
     299  VAL      3.2     0.2    -      -       -      -
     309  PHE*     1.3    76.0    -      -       -      +
     329  ALA*     1.3    59.2    +      -       -      +
     349  ILE*     3.3     1.8    +      -       -      -
     359  ASN*     2.9    37.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 32 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     310  ALA*     3.3    35.9    -      -       +      +
     340  ILE*     3.3    14.6    -      -       +      +
     350  ASN*     3.4    23.6    -      -       -      +
     289  ILE      3.0    16.3    +      -       -      +
     299  VAL      3.7     3.4    -      -       -      +
     319  ALA*     1.3    75.8    -      -       -      +
     339  LEU*     1.3    58.4    +      -       -      +
     359  ASN*     4.5     2.2    -      -       -      +
     369  GLY      2.9    23.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 33 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     340  ILE*     3.7     7.1    -      -       +      +
     508  MET*     3.7    33.0    -      -       +      -
     299  VAL      2.9    14.5    +      -       -      +
     309  PHE*     3.3    27.8    -      -       +      +
     329  ALA*     1.3    77.2    -      -       -      +
     349  ILE*     1.3    57.6    +      -       +      +
     369  GLY*     3.3     1.0    +      -       -      -
     379  VAL*     2.9    44.5    +      -       +      +
     449  LYS      5.5     0.4    -      -       -      +
     479  VAL*     3.7    25.9    -      -       +      +
     489  PHE*     4.3    18.8    -      -       +      +
     519  ALA*     3.7    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 34 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     298  VAL*     3.7    29.8    -      -       +      +
     328  ALA*     3.3    28.5    -      -       +      +
     338  LEU*     3.8     5.6    -      -       +      +
     368  GLY*     4.7     5.4    -      -       -      -
     478  VAL*     3.7    27.6    -      -       +      +
     508  MET*     4.9    13.9    -      -       +      -
     518  ALA*     4.2    24.9    -      -       +      +
     309  PHE*     2.9    24.1    +      -       +      +
     319  ALA      3.3     4.5    +      -       -      +
     339  LEU*     1.3    75.1    -      -       +      +
     359  ASN*     1.3    58.9    +      -       -      +
     379  VAL*     3.3     4.8    +      -       -      +
     389  SER*     2.9    31.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 35 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     350  ASN*     4.2    13.2    -      -       -      +
     328  ALA*     3.6    30.6    -      -       -      +
     358  ASN*     4.2    15.0    -      -       -      +
     368  GLY      4.4     1.2    +      -       -      -
     398  ARG*     5.3     7.0    +      -       -      +
     319  ALA*     2.9    26.1    +      -       -      +
     329  ALA*     3.7     3.3    -      -       -      +
     349  ILE*     1.3    75.5    -      -       -      +
     369  GLY*     1.3    57.1    +      -       -      +
     389  SER*     3.4    12.3    +      -       -      -
     399  ARG*     3.4    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 36 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     340  ILE*     5.1     3.8    -      -       -      -
     350  ASN*     4.7     2.2    -      -       -      -
     380  SER*     3.0    29.5    +      -       -      -
     329  ALA      2.9    17.1    +      -       -      -
     339  LEU      3.7     0.9    -      -       -      -
     349  ILE      3.2     0.2    -      -       -      -
     359  ASN*     1.3    78.0    -      -       -      +
     379  VAL*     1.3    60.4    +      -       -      +
     389  SER      3.3     0.2    -      -       -      -
     409  ASN      2.8    29.2    +      -       -      +
     439  ILE*     4.4     3.9    -      -       -      +
     479  VAL*     6.2     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 37 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     438  ILE*     4.2     9.0    -      -       +      +
     468  THR*     4.4     4.7    -      -       +      -
     478  VAL*     3.8    23.3    -      -       +      -
     508  MET*     4.4     9.2    -      -       -      -
     339  LEU*     2.9    35.8    +      -       +      +
     349  ILE*     4.0     3.8    -      -       -      +
     369  GLY*     1.3    76.4    -      -       -      +
     389  SER*     1.3    62.3    +      -       -      +
     409  ASN      3.1    23.1    -      -       -      -
     419  PRO*     3.1    16.8    -      -       +      +
     439  ILE*     5.5     0.9    -      -       +      -
     449  LYS*     4.1    41.1    -      -       +      -
     479  VAL*     5.7     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 38 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     368  GLY*     3.6    36.3    -      -       -      -
     398  ARG*     4.3    13.2    -      -       -      +
     408  ASN*     3.6    24.7    +      -       -      +
     438  ILE*     4.2    16.6    -      -       -      -
     478  VAL*     4.7     3.1    -      -       -      +
     349  ILE*     2.9    20.4    +      -       -      -
     359  ASN*     3.4    14.0    +      -       -      -
     379  VAL*     1.3    77.1    -      -       -      +
     399  ARG*     1.3    63.9    +      -       -      +
     419  PRO*     4.7     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 39 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     350  ASN*     4.8     7.7    +      -       -      +
     380  SER*     3.9    23.6    +      -       -      +
     390  ARG*     3.1    46.3    -      -       -      +
     398  ARG*     4.2    41.0    -      -       -      +
     359  ASN*     3.4    21.7    +      -       -      +
     369  GLY      3.4     1.0    +      -       -      -
     389  SER*     1.3    84.8    +      -       -      +
     409  ASN*     1.3    58.0    +      -       -      +
     419  PRO*     4.1     4.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 40 (chain 9). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     370  VAL      5.4     0.2    +      -       -      -
     380  SER*     3.9    23.7    +      -       -      +
     410  PRO*     5.3    10.9    -      -       -      +
     369  GLY      2.8    21.2    +      -       -      +
     379  VAL*     3.1     8.7    -      -       -      +
     399  ARG*     1.3    78.4    -      -       +      +
     419  PRO*     1.3    65.7    -      -       -      +
     429  SER*     2.6    31.7    +      -       -      -
     439  ILE*     3.5    29.8    -      -       +      +
     449  LYS      4.7     0.2    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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