Contacts of the helix formed by residues 313 - 334 (chain D) in PDB entry 4IL6


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 THR 313 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  VAL*     4.0     8.3    -      -       -      -
     68A  SER      3.4    12.3    -      -       -      +
     75A  ASN*     3.3    29.4    -      -       -      +
     79A  THR*     4.6     1.6    -      -       -      -
    301D  GLN*     2.8    19.8    +      -       -      +
    311D  PHE*     3.6    29.6    -      -       +      -
    312D  GLU*     1.3    79.9    -      -       -      +
    314D  PHE*     1.3    63.2    +      -       -      +
    315D  TYR*     3.3    11.5    +      -       -      +
    316D  THR*     2.9    25.3    +      -       -      +
    317D  LYS*     3.1    13.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 314 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  ILE*     4.1    21.5    -      -       +      -
     67A  VAL*     4.2     8.2    -      -       +      +
     68A  SER      4.7     1.9    +      -       -      -
     69A  GLY*     5.8     0.2    -      -       -      -
     79A  THR      4.4     5.6    +      -       -      +
     81A  ALA*     3.8    25.6    -      -       +      -
     83A  VAL*     4.0    20.4    -      -       +      -
     84A  PRO*     4.1     3.1    -      -       +      -
    173A  PRO*     3.5    35.7    -      -       +      -
    177A  SER*     3.8     6.5    -      -       -      -
    178A  GLY*     3.5    28.9    -      -       -      +
    181A  ASN*     3.8    17.0    -      -       +      -
    313D  THR*     1.3    75.1    -      -       -      +
    315D  TYR*     1.3    61.1    +      -       -      +
    317D  LYS*     3.7    31.9    -      -       +      +
    318D  ASN*     3.1    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 315 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  THR*     3.3    26.3    -      -       +      -
    177A  SER*     4.0    11.5    -      -       -      +
    190D  ASN*     5.0     0.9    -      -       -      -
    193D  LEU*     4.0    15.7    -      -       +      -
    296D  TYR      3.8    15.0    -      -       -      -
    297D  ASP*     3.0     9.9    -      -       -      +
    298D  PHE*     2.9    44.2    +      +       +      -
    301D  GLN*     3.5    33.7    -      -       +      -
    302D  GLU*     2.6    32.3    +      -       -      -
    313D  THR*     3.1     6.0    +      -       -      +
    314D  PHE*     1.3    78.8    -      -       -      +
    316D  THR*     1.3    71.0    +      -       +      +
    318D  ASN*     3.5     5.9    +      -       -      +
    319D  LEU*     3.4    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 316 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301D  GLN*     4.6     4.9    -      -       -      +
    302D  GLU*     5.0     0.7    -      -       -      +
    305D  ALA*     4.3    13.9    -      -       +      -
    311D  PHE*     5.0     5.6    -      -       +      +
    312D  GLU*     3.6    12.0    -      -       -      +
    313D  THR*     2.9    35.1    +      -       -      +
    315D  TYR*     1.3    91.9    -      -       +      +
    317D  LYS*     1.3    65.5    +      -       -      +
    319D  LEU*     3.4    15.7    +      -       -      +
    320D  LEU*     3.5    16.6    +      -       -      +
    159O  PRO*     4.0    17.8    +      -       -      +
    160O  LYS*     4.2    20.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 317 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  ILE*     5.3     3.8    -      -       -      +
     61A  ASP*     4.1    18.2    +      -       -      -
     65A  GLU*     6.0     0.2    +      -       -      -
     67A  VAL*     4.2    21.8    -      -       +      +
    181A  ASN*     3.9    11.8    +      -       -      +
    333A  GLU*     4.4     6.9    +      -       -      +
    334A  ARG*     4.9     4.5    -      -       -      +
   1003A   CL      3.1    27.0    -      -       +      +
    312D  GLU*     3.4    24.8    +      -       -      +
    313D  THR      3.1    16.9    +      -       -      +
    314D  PHE*     3.7    39.9    -      -       +      +
    315D  TYR      3.3     0.2    -      -       -      -
    316D  THR*     1.3    77.0    +      -       -      +
    318D  ASN*     1.3    61.7    +      -       -      +
    320D  LEU*     3.3    22.4    +      -       -      +
    321D  LEU*     3.4    16.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 318 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  SER*     3.0    33.1    +      -       -      -
    180A  PHE*     3.8    10.3    -      -       -      +
    181A  ASN*     3.1    38.5    +      -       -      +
    184A  ILE*     4.1    12.2    -      -       +      +
    186D  GLN*     5.2     0.7    -      -       -      +
    190D  ASN*     5.1     9.6    -      -       -      +
    193D  LEU*     6.3     0.4    -      -       -      +
    314D  PHE      3.1    16.8    +      -       -      +
    315D  TYR*     3.9     5.3    -      -       -      +
    316D  THR      3.3     0.2    -      -       -      -
    317D  LYS*     1.3    73.9    -      -       -      +
    319D  LEU*     1.3    65.1    +      -       +      +
    321D  LEU*     3.3    12.9    +      -       -      +
    322D  ASN*     3.0    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 319 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190D  ASN*     3.6    24.0    -      -       -      +
    296D  TYR*     3.5    37.2    +      -       +      +
    302D  GLU*     2.9    29.4    -      -       -      +
    315D  TYR*     3.4    29.2    +      -       +      +
    316D  THR*     3.8     7.4    -      -       -      +
    317D  LYS      3.4     0.6    -      -       -      -
    318D  ASN*     1.3    77.9    -      -       +      +
    320D  LEU*     1.3    57.4    +      -       -      +
    322D  ASN*     3.2     7.9    +      -       -      +
    323D  GLU*     2.9    46.3    +      -       -      +
    160O  LYS*     3.6    16.4    -      -       -      +
    173O  ALA*     5.5     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 320 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    331A  MET*     3.4    39.6    -      -       +      +
    334A  ARG*     3.5    35.9    -      -       -      +
    312D  GLU*     5.0     0.2    -      -       -      +
    316D  THR      3.5    11.2    +      -       -      +
    317D  LYS*     3.3    13.6    +      -       -      +
    318D  ASN      3.3     0.4    -      -       -      -
    319D  LEU*     1.3    76.8    -      -       +      +
    321D  LEU*     1.3    58.3    +      -       +      +
    323D  GLU*     3.4    21.8    +      -       -      +
    324D  GLY      3.1    22.0    +      -       -      -
    159O  PRO      3.4    19.7    -      -       -      +
    160O  LYS*     4.1     4.7    -      -       -      +
    161O  GLY*     3.8    28.7    -      -       -      +
    168O  TYR*     4.7     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 321 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181A  ASN*     3.7    25.8    -      -       -      +
    184A  ILE*     3.6    36.1    -      -       +      -
    185A  VAL*     4.2     7.6    -      -       +      -
    327A  GLY      4.2     2.1    -      -       -      +
    328A  MET*     3.6    16.6    -      -       +      +
    331A  MET*     4.1     5.8    -      -       -      -
    332A  HIS*     3.5    39.9    -      -       +      +
   1003A   CL      4.2     2.9    -      -       +      -
    317D  LYS      3.5     9.9    -      -       -      +
    318D  ASN*     3.3    17.5    +      -       -      +
    319D  LEU      3.3     0.2    -      -       -      -
    320D  LEU*     1.3    75.7    -      -       +      +
    322D  ASN*     1.3    60.7    +      -       -      +
    324D  GLY*     3.2     2.9    +      -       -      -
    325D  ILE*     2.8    33.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 322 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  ILE*     4.9     0.5    -      -       -      +
    186D  GLN*     2.8    42.6    +      -       -      +
    187D  GLY*     3.4    16.6    -      -       -      +
    190D  ASN*     3.3    31.7    +      -       -      +
    296D  TYR*     3.5    18.9    +      -       -      +
    318D  ASN      3.0    18.3    +      -       -      +
    319D  LEU*     3.3    13.1    -      -       -      +
    321D  LEU*     1.3    75.4    -      -       -      +
    323D  GLU*     1.3    58.2    +      -       -      +
    325D  ILE*     3.2     4.1    +      -       -      +
    326D  ARG*     2.9    35.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 323 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    331A  MET*     5.6     0.4    -      -       +      -
    365B  SER*     4.1     6.7    -      -       -      +
    296D  TYR*     4.8     2.5    +      -       -      +
    319D  LEU*     2.9    34.5    +      -       -      +
    320D  LEU*     3.5    22.2    -      -       -      +
    321D  LEU      3.2     0.2    -      -       -      -
    322D  ASN*     1.3    75.3    -      -       -      +
    324D  GLY*     1.3    61.2    +      -       -      +
    326D  ARG*     3.4    29.0    +      -       -      +
    327D  ALA*     3.2    25.1    +      -       -      +
    347D  PRO*     4.1     6.3    -      -       +      +
    160O  LYS*     4.6     8.7    +      -       -      +
    168O  TYR*     2.9    38.5    +      -       -      +
    172O  ILE*     3.6    15.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 324 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327A  GLY*     3.3    27.2    -      -       -      -
    331A  MET*     3.6    13.6    -      -       -      +
    320D  LEU      3.1    11.3    +      -       -      -
    321D  LEU      3.2     1.1    +      -       -      -
    323D  GLU*     1.3    73.9    -      -       -      +
    325D  ILE*     1.3    63.7    +      -       -      +
    327D  ALA      3.4     0.3    +      -       -      -
    328D  TRP*     3.0    34.0    +      -       -      -
    347D  PRO*     4.6     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 325 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  ILE*     4.7     3.6    -      -       +      -
    324A  ALA*     3.7    13.7    -      -       +      +
    327A  GLY*     3.8     5.8    -      -       -      -
    328A  MET*     3.6    39.5    -      -       +      -
    183D  LEU      3.9     8.3    -      -       -      +
    186D  GLN*     4.3    14.4    -      -       +      -
    187D  GLY*     3.9    29.6    -      -       -      +
    188D  PHE*     5.0     0.9    -      -       +      -
    321D  LEU      2.8    23.8    +      -       -      +
    322D  ASN*     3.5     9.6    -      -       -      +
    324D  GLY*     1.3    70.7    -      -       -      +
    326D  ARG*     1.3    59.3    +      -       -      +
    329D  MET*     2.9    56.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 326 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362B  PHE      4.8     0.2    -      -       -      -
    363B  PHE*     4.1    18.8    -      -       +      +
    364B  GLU*     4.0    13.3    -      -       -      +
    365B  SER*     2.9    41.8    +      -       -      +
    187D  GLY      2.8    35.0    +      -       -      +
    188D  PHE*     3.6    45.6    -      -       +      +
    296D  TYR*     2.8    32.7    +      -       -      -
    322D  ASN*     2.9    23.9    +      -       -      +
    323D  GLU*     3.4    24.3    +      -       -      +
    325D  ILE*     1.3    76.7    -      -       -      +
    327D  ALA*     1.3    57.7    +      -       -      +
    330D  ALA*     3.0    36.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 327 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323A  ARG*     5.3     0.2    +      -       -      -
    363B  PHE*     5.8     0.7    -      -       -      -
    367B  PRO*     6.1     5.6    -      -       +      -
    323D  GLU      3.2    14.6    +      -       -      +
    326D  ARG*     1.3    78.0    -      -       -      +
    328D  TRP*     1.3    65.8    +      -       +      +
    331D  PRO*     3.3    18.2    -      -       -      +
    341D  PHE*     3.4    22.7    -      -       +      -
    346D  LEU*     4.0    10.5    -      -       +      +
    347D  PRO*     3.6    28.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 328 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323A  ARG*     2.9    65.0    +      -       -      +
    326A  LEU*     3.8    19.5    -      -       +      -
    327A  GLY*     3.7    11.4    -      -       -      -
    330A  VAL*     3.5    21.8    -      -       +      +
    324D  GLY*     3.0    23.4    +      -       -      +
    327D  ALA*     1.3    88.0    -      -       +      +
    329D  MET*     1.3    59.0    +      -       -      +
    331D  PRO*     4.1     4.0    -      -       -      +
    332D  GLN      5.5     0.3    +      -       -      -
    346D  LEU*     3.9    23.9    -      -       +      +
    347D  PRO      3.2    21.0    +      -       -      -
    348D  ARG*     3.7    27.1    -      -       +      -
    134V  LYS*     3.8    19.1    -      -       +      -
    135V  VAL*     3.7    41.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 329 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320A  ILE*     4.0    14.2    -      -       +      +
    323A  ARG*     3.7     9.1    -      -       +      +
    324A  ALA*     3.8    30.3    -      -       +      +
    180D  ARG*     4.0    22.4    -      -       +      +
    184D  PHE*     4.3    10.8    -      -       +      -
    188D  PHE*     4.2    19.3    -      -       +      -
    325D  ILE*     2.9    39.2    +      -       -      +
    328D  TRP*     1.3    77.9    -      -       -      +
    330D  ALA*     1.3    64.7    +      -       -      +
    331D  PRO      3.3     1.7    -      -       -      -
    332D  GLN*     3.4     4.9    +      -       -      +
    333D  ASP*     2.9    59.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 330 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363B  PHE*     3.8    27.8    -      -       +      -
    188D  PHE*     4.5     1.1    -      -       +      -
    326D  ARG      3.0    20.7    +      -       -      +
    329D  MET*     1.3    80.4    -      -       -      +
    331D  PRO*     1.4    64.8    -      -       +      +
    333D  ASP*     4.4     1.8    -      -       -      -
    334D  GLN*     2.8    44.7    +      -       -      +
    339D  PHE*     3.9    11.7    -      -       +      -
    341D  PHE*     4.4     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 331 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323A  ARG*     5.8     4.0    -      -       -      +
    327D  ALA      3.3    16.8    -      -       -      +
    328D  TRP      4.1     5.2    -      -       -      +
    329D  MET      3.6     3.1    -      -       -      -
    330D  ALA*     1.4    92.9    -      -       +      +
    332D  GLN*     1.3    62.8    +      -       +      +
    334D  GLN      3.9     0.9    -      -       -      +
    335D  PRO*     3.8    19.1    -      -       -      +
    339D  PHE*     3.9    33.2    +      -       +      +
    341D  PHE*     3.7    27.8    -      -       +      +
    346D  LEU*     6.2     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 332 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  ASN*     3.3    30.6    +      -       -      +
    319A  ASP*     4.6     3.0    +      -       -      +
    320A  ILE*     3.8    22.1    -      -       +      +
    323A  ARG*     3.5    43.9    +      -       +      +
     61D  HIS      4.6     5.9    -      -       -      +
    328D  TRP      5.5     0.2    +      -       -      -
    329D  MET      3.4     5.3    +      -       -      +
    330D  ALA      3.3     0.2    -      -       -      -
    331D  PRO*     1.3    80.2    -      -       +      +
    333D  ASP*     1.3    62.7    +      -       -      +
    334D  GLN      3.3     0.6    +      -       -      -
    335D  PRO*     3.6    14.6    -      -       -      +
    136V  TYR      5.2     0.9    -      -       -      +
    137V  TYR*     3.5    12.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 333 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317A  TRP*     4.0     6.4    -      -       -      -
    320A  ILE*     3.3    24.1    -      -       +      +
     61D  HIS*     5.5     0.2    +      -       -      -
    168D  PHE*     3.3    24.9    -      -       -      -
    180D  ARG*     2.8    45.1    +      -       -      -
    184D  PHE*     3.4    17.0    -      -       -      -
    329D  MET*     2.9    35.0    +      -       +      +
    330D  ALA*     4.2     2.2    -      -       -      +
    332D  GLN*     1.3    78.2    -      -       -      +
    334D  GLN*     1.3    61.1    +      -       +      +
    335D  PRO*     3.5     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 334 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360B  PRO*     5.5     0.5    -      -       -      +
    362B  PHE*     4.3     6.7    -      -       -      -
    363B  PHE*     3.8    22.7    -      -       -      -
    169D  PHE*     3.9    27.6    -      -       +      -
    184D  PHE*     3.9     9.3    -      -       -      -
    188D  PHE*     3.4    36.0    -      -       -      -
    330D  ALA*     2.8    21.2    +      -       -      +
    331D  PRO      3.9     2.1    -      -       -      +
    333D  ASP*     1.3    88.8    +      -       +      +
    335D  PRO*     1.3    65.4    -      -       -      +
    336D  HIS*     3.2    17.0    -      -       +      -
    337D  GLU*     3.0    34.9    +      -       +      +
    338D  ASN      4.2     1.0    +      -       -      -
    339D  PHE*     4.3     4.6    +      -       +      -
----------------------------------------------------------
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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