Contacts of the helix formed by residues 18 - 39 (chain Q) in PDB entry 6CP3


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 Q).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16Q  THR      3.1     3.8    +      -       -      -
     17Q  ILE*     1.3    75.4    -      -       -      +
     19Q  LEU*     1.3    59.1    +      -       -      +
     20Q  LEU      3.2     3.7    +      -       -      -
     21Q  GLY*     3.4    10.7    +      -       -      -
     22Q  ALA*     4.0     5.7    +      -       -      +
     62Q  GLY*     5.2     1.7    -      -       -      -
     65Q  CYS*     3.9    19.6    -      -       -      -
     16R  THR      5.3     0.2    -      -       -      -
     17R  ILE*     3.4    22.5    -      -       -      +
     19R  LEU*     5.1     6.2    -      -       -      +
     20R  LEU*     3.6    18.4    -      -       -      +
     23R  GLY*     5.9     0.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 19 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18P  GLY*     3.3    33.9    -      -       -      +
     19P  LEU*     4.4     0.7    -      -       -      -
     21P  GLY*     5.0     0.7    -      -       -      -
     22P  ALA      5.7     0.4    -      -       -      +
     61P  THR*     3.3    48.5    +      -       +      +
     62P  GLY*     4.1     1.8    -      -       -      +
     64P  PHE*     4.8     5.6    -      -       +      -
     65P  CYS*     3.8    22.4    -      -       +      +
     16Q  THR*     3.4    24.0    +      -       +      +
     18Q  GLY*     1.3    73.3    -      -       -      +
     20Q  LEU*     1.3    60.3    -      -       -      +
     21Q  GLY      3.3     0.4    -      -       -      -
     22Q  ALA*     3.9    10.7    -      -       +      +
     23Q  GLY*     2.9    27.0    +      -       -      -
     59Q  GLU*     5.6     0.7    -      -       -      +
     62Q  GLY*     5.0    12.6    -      -       -      +
     65Q  CYS*     4.7     1.6    -      -       +      -
     66Q  LEU*     5.4     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 20 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17P  ILE      5.1     1.6    -      -       -      +
     18P  GLY*     3.5    16.9    +      -       -      +
     20P  LEU*     3.7    28.7    -      -       +      -
     21P  GLY*     3.4    29.2    -      -       -      +
     24P  ILE*     5.0     0.7    -      -       +      -
     17Q  ILE*     3.3    24.7    +      -       +      +
     19Q  LEU*     1.3    75.8    -      -       -      +
     21Q  GLY*     1.3    58.5    +      -       -      +
     23Q  GLY      3.3     0.2    +      -       -      -
     24Q  ILE*     3.0    49.3    +      -       +      +
     20R  LEU*     3.8    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 21 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18Q  GLY      3.4     1.3    +      -       -      -
     19Q  LEU      3.3     0.6    -      -       -      -
     20Q  LEU*     1.3    78.7    -      -       -      +
     22Q  ALA*     1.3    61.9    +      -       -      +
     24Q  ILE*     3.4     0.6    +      -       -      -
     25Q  GLY      2.8    23.7    +      -       -      -
     20R  LEU*     3.3    25.7    -      -       -      +
     23R  GLY      3.1    15.8    -      -       -      -
     24R  ILE*     3.2    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 22 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18Q  GLY      4.0     3.2    +      -       -      +
     19Q  LEU*     3.5    10.3    +      -       -      +
     20Q  LEU      3.4     0.2    -      -       -      -
     21Q  GLY*     1.3    76.4    -      -       -      +
     23Q  GLY*     1.3    56.4    +      -       -      +
     26Q  ILE*     3.0    34.4    +      -       -      +
     58Q  SER      4.7     3.4    -      -       -      +
     59Q  GLU*     3.3    31.4    -      -       -      +
     61Q  THR*     4.4     6.3    -      -       -      +
     62Q  GLY*     4.2    22.7    -      -       -      +
     23R  GLY*     3.8    12.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 23 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21P  GLY      3.9    16.8    -      -       -      +
     22P  ALA*     4.8     1.2    -      -       -      -
     25P  GLY*     4.3     1.6    -      -       -      -
     58P  SER*     4.9     6.0    -      -       -      -
     61P  THR*     4.5    15.2    -      -       -      +
     19Q  LEU      2.9    16.9    +      -       -      -
     20Q  LEU      3.8     1.3    -      -       -      -
     21Q  GLY      3.3     0.2    -      -       -      -
     22Q  ALA*     1.3    76.2    -      -       -      +
     24Q  ILE*     1.3    61.7    +      -       -      +
     26Q  ILE*     3.8    11.7    -      -       -      +
     27Q  ALA*     3.3    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 24 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21P  GLY*     3.8    14.6    -      -       -      +
     24P  ILE*     4.0    26.7    -      -       +      -
     25P  GLY*     5.2     1.3    -      -       -      -
     28P  ILE*     5.8     2.7    -      -       +      -
     20Q  LEU*     3.0    44.7    +      -       +      +
     21Q  GLY      3.9     4.0    -      -       -      +
     23Q  GLY*     1.3    77.3    -      -       -      +
     25Q  GLY*     1.3    57.2    +      -       -      +
     27Q  ALA*     3.3     6.3    +      -       -      +
     28Q  ILE*     2.9    47.2    +      -       +      +
     24R  ILE*     4.2    21.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 25 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21Q  GLY      2.8    10.6    +      -       -      -
     22Q  ALA      3.3     0.2    +      -       -      -
     24Q  ILE*     1.3    78.5    -      -       -      +
     26Q  ILE*     1.3    56.7    +      -       -      +
     28Q  ILE*     3.2     9.4    +      -       -      +
     29Q  VAL*     2.9    30.3    +      -       -      +
     23R  GLY      3.5    19.1    -      -       -      -
     24R  ILE*     4.0     7.6    -      -       -      -
     27R  ALA*     3.4    15.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 26 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57P  LEU      3.4    18.8    -      -       -      +
     58P  SER*     3.3    31.4    -      -       -      +
     61P  THR*     4.8     1.1    -      -       +      -
     22Q  ALA*     3.0    14.1    +      -       -      +
     23Q  GLY*     3.8     7.9    -      -       -      +
     25Q  GLY*     1.3    76.2    -      -       -      +
     27Q  ALA*     1.3    59.3    +      -       -      +
     29Q  VAL*     3.3     8.2    +      -       -      +
     30Q  PHE*     2.9    36.3    +      -       -      -
     55Q  PHE*     3.6    42.8    -      -       +      +
     58Q  SER*     4.6     7.4    -      -       -      -
     59Q  GLU*     3.3    35.4    -      -       +      +
     23R  GLY      5.6     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 27 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25P  GLY*     3.3    35.7    -      -       -      +
     28P  ILE*     3.9     8.6    -      -       +      +
     29P  VAL*     3.6    15.5    -      -       +      +
     58P  SER*     4.9     4.0    -      -       -      +
     23Q  GLY      3.3    16.8    +      -       -      +
     24Q  ILE      3.3     5.4    +      -       -      +
     25Q  GLY      3.2     0.4    -      -       -      -
     26Q  ILE*     1.3    81.0    -      -       +      +
     28Q  ILE*     1.3    60.2    +      -       -      +
     30Q  PHE*     3.4     1.1    +      -       -      -
     31Q  ALA*     2.8    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 28 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28P  ILE*     4.7    11.2    -      -       +      -
     24Q  ILE*     2.9    37.8    +      -       +      +
     25Q  GLY*     3.2     6.7    +      -       -      +
     27Q  ALA*     1.3    76.1    -      -       -      +
     29Q  VAL*     1.3    56.6    +      -       -      +
     31Q  ALA*     3.4     7.8    -      -       +      +
     32Q  ALA*     2.9    29.6    +      -       +      +
     24R  ILE*     4.9     4.0    -      -       +      -
     28R  ILE*     3.7    34.1    -      -       +      -
     31R  ALA*     4.0    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 29 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25Q  GLY      2.9    18.1    +      -       -      +
     26Q  ILE*     3.4    12.1    -      -       -      +
     28Q  ILE*     1.3    77.3    -      -       -      +
     30Q  PHE*     1.3    63.4    +      -       +      +
     32Q  ALA*     3.4     1.2    +      -       -      -
     33Q  LEU*     2.9    29.0    +      -       +      +
     51Q  ALA*     4.1    19.7    -      -       +      +
     54Q  GLY      5.3     0.2    -      -       -      -
     55Q  PHE*     4.7    13.9    -      -       +      +
     58Q  SER*     5.2     2.0    -      -       -      +
     27R  ALA*     3.2    37.0    -      -       +      +
     30R  PHE*     4.4     9.2    -      -       +      -
     31R  ALA*     4.7     6.5    -      -       -      +
     34R  ILE*     3.8    20.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 30 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29P  VAL*     3.7    23.3    -      -       +      -
     50P  MET*     3.7    28.5    -      -       +      -
     53P  LEU*     3.9    25.4    -      -       +      -
     54P  GLY*     3.6    19.7    -      -       -      -
     58P  SER*     4.9     1.6    -      -       -      -
     26Q  ILE      2.9    29.6    +      -       -      +
     27Q  ALA*     5.1     0.4    -      -       -      -
     29Q  VAL*     1.3    78.4    -      -       +      +
     31Q  ALA*     1.3    56.5    +      -       -      +
     33Q  LEU*     3.3    27.7    -      -       +      +
     34Q  ILE*     2.9    36.7    +      -       +      +
     48Q  PHE*     5.1     5.8    -      +       -      -
     51Q  ALA*     6.2     1.1    -      -       +      -
     52Q  ILE*     5.7     4.9    -      -       +      -
     55Q  PHE*     3.5    40.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with ALA 31 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28P  ILE*     4.7    12.3    -      -       +      +
     29P  VAL*     4.7     1.8    -      -       -      +
     32P  ALA*     3.6    22.0    -      -       +      +
     27Q  ALA      2.8    18.4    +      -       -      +
     28Q  ILE*     3.4    12.3    -      -       +      +
     29Q  VAL      3.2     0.2    -      -       -      -
     30Q  PHE*     1.3    77.9    -      -       -      +
     32Q  ALA*     1.3    58.3    +      -       -      +
     33Q  LEU      3.3     0.2    +      -       -      -
     34Q  ILE      3.4     0.2    +      -       -      -
     35Q  ASN*     2.9    38.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 32 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28Q  ILE*     2.9    16.4    +      -       +      +
     29Q  VAL      4.0     1.3    -      -       -      +
     31Q  ALA*     1.3    72.6    -      -       -      +
     33Q  LEU*     1.3    60.8    +      -       -      +
     35Q  ASN*     3.7     7.8    -      -       -      +
     36Q  GLY*     2.8    26.0    +      -       -      -
     31R  ALA*     3.4    40.6    -      -       +      +
     34R  ILE*     3.7     7.7    -      -       +      +
     35R  ASN*     3.9    15.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 33 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50P  MET*     3.7    32.8    -      -       +      -
     29Q  VAL*     2.9    19.3    +      -       +      +
     30Q  PHE*     3.3    36.8    -      -       +      +
     31Q  ALA      3.1     0.2    -      -       -      -
     32Q  ALA*     1.3    77.3    -      -       -      +
     34Q  ILE*     1.3    60.1    +      -       +      +
     36Q  GLY*     3.3     1.2    +      -       -      -
     37Q  VAL*     2.9    34.7    +      -       +      +
     44Q  LYS      5.6     1.6    -      -       -      +
     47Q  VAL*     4.8     4.7    -      -       +      -
     48Q  PHE*     4.3    12.6    -      -       +      +
     51Q  ALA*     3.8    31.2    -      -       +      -
     34R  ILE*     3.7    20.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 34 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29P  VAL*     3.4    37.7    -      -       +      +
     32P  ALA*     3.3    23.1    -      -       +      +
     33P  LEU*     3.8    26.0    -      -       +      +
     36P  GLY*     4.5     7.2    -      -       -      -
     47P  VAL*     5.1    12.8    -      -       +      +
     50P  MET*     5.6     5.8    -      -       +      -
     51P  ALA*     4.4    14.1    -      -       +      +
     30Q  PHE*     2.9    22.5    +      -       +      +
     31Q  ALA      4.0     2.9    -      -       -      +
     33Q  LEU*     1.3    78.3    -      -       +      +
     35Q  ASN*     1.3    58.9    +      -       -      +
     37Q  VAL*     3.4     9.7    -      -       +      +
     38Q  SER*     2.9    31.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 35 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32P  ALA*     3.7    24.1    -      -       -      +
     35P  ASN*     3.9    18.3    -      -       -      +
     36P  GLY*     4.4     2.3    +      -       -      -
     39P  ARG*     5.5     1.4    +      -       -      -
     31Q  ALA*     2.9    30.6    +      -       -      +
     32Q  ALA*     4.0     6.8    -      -       -      +
     34Q  ILE*     1.3    75.3    -      -       -      +
     36Q  GLY*     1.3    53.1    +      -       -      +
     38Q  SER*     3.4    11.5    +      -       -      -
     39Q  ARG*     2.4    50.2    +      -       -      +
     35R  ASN*     4.9     5.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 36 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32Q  ALA      2.8    17.2    +      -       -      -
     33Q  LEU      3.8     0.9    -      -       -      -
     34Q  ILE      3.2     0.2    -      -       -      -
     35Q  ASN*     1.3    76.1    -      -       -      +
     37Q  VAL*     1.3    63.8    +      -       -      +
     38Q  SER      3.4     0.7    -      -       -      -
     39Q  ARG*     3.3    11.4    -      -       -      +
     40Q  ASN*     3.4     9.2    -      -       -      +
     43Q  ILE      5.3     0.3    -      -       -      +
     34R  ILE*     4.5     7.4    -      -       -      -
     35R  ASN*     4.7     3.1    +      -       -      -
     38R  SER*     3.3    35.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 37 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43P  ILE*     5.3     5.7    -      -       +      +
     47P  VAL*     4.1    23.3    -      -       +      -
     50P  MET*     4.9     7.4    -      -       +      -
     33Q  LEU*     2.9    26.0    +      -       +      +
     34Q  ILE*     3.4    14.1    -      -       +      +
     36Q  GLY*     1.3    75.6    -      -       -      +
     38Q  SER*     1.3    64.8    +      -       -      +
     39Q  ARG      3.3     0.4    -      -       -      -
     40Q  ASN      3.0    33.3    -      -       -      +
     41Q  PRO*     3.5     8.1    -      -       +      +
     43Q  ILE      4.2     2.7    -      -       -      +
     44Q  LYS*     3.7    42.6    -      -       +      +
     34R  ILE*     5.7     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 38 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36P  GLY*     3.5    37.2    -      -       -      -
     39P  ARG*     3.5    16.7    +      -       -      +
     40P  ASN*     3.6    30.2    +      -       -      +
     43P  ILE*     5.5     4.3    -      -       -      -
     34Q  ILE*     2.9    18.6    +      -       -      -
     35Q  ASN*     3.4    10.7    +      -       -      -
     37Q  VAL*     1.3    79.1    -      -       -      +
     39Q  ARG*     1.3    60.2    +      -       -      +
     40Q  ASN      3.2     0.8    +      -       -      -
     41Q  PRO*     4.4     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 39 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201G  THR*     3.5    34.8    +      -       +      +
    202G  ASP*     4.1     8.3    +      -       -      -
     39P  ARG*     3.1    40.3    -      -       -      +
     35Q  ASN*     2.4    42.2    +      -       -      +
     36Q  GLY*     3.3    13.0    -      -       -      +
     38Q  SER*     1.3    78.4    +      -       -      +
     40Q  ASN*     1.3    57.4    +      -       -      +
     41Q  PRO*     4.0     3.8    -      -       -      +
     35R  ASN*     5.2     8.2    +      -       -      +
     38R  SER*     3.9    22.8    +      -       -      +
     39R  ARG*     5.0    14.4    -      -       -      +
----------------------------------------------------------
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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