Contacts of the helix formed by residues 548 - 571 (chain B) in PDB entry 3RMD


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 548 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    488B  TYR*     5.7     0.9    -      -       +      +
    489B  MET*     4.6     3.5    +      -       -      -
    492B  ALA*     4.6     2.2    -      -       +      -
    518B  TYR*     3.1    39.2    -      -       +      +
    519B  ARG*     3.2    37.7    -      -       +      -
    544B  ARG*     3.4    16.0    +      -       -      +
    545B  ALA      4.9     0.4    -      -       -      -
    546B  GLN      3.0     0.2    -      -       -      -
    547B  ARG*     1.3    76.7    -      -       -      +
    549B  GLU*     1.3    64.8    +      -       -      +
    550B  VAL      3.4     0.7    -      -       -      -
    551B  ALA*     3.3    10.4    +      -       +      +
    552B  GLY*     3.3    17.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 549 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    489B  MET*     2.5    73.5    -      -       +      +
    492B  ALA*     4.2     9.3    -      -       +      +
    493B  GLN*     3.0    36.1    +      -       -      +
    546B  GLN*     2.8    35.7    +      -       +      +
    548B  THR*     1.3    80.0    -      -       -      +
    550B  VAL*     1.3    69.0    +      -       +      +
    552B  GLY      3.4     0.2    +      -       -      -
    553B  MET*     3.3     8.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 550 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339B  GLN*     5.3    11.9    -      -       +      +
    546B  GLN*     3.2    13.1    +      -       +      +
    547B  ARG*     4.1     7.6    +      -       -      +
    549B  GLU*     1.3    82.1    -      -       +      +
    551B  ALA*     1.3    58.5    +      -       -      +
    552B  GLY      3.2     1.1    -      -       -      -
    553B  MET*     3.8     9.6    -      -       +      -
    554B  THR*     3.2    33.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 551 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346B  ASP*     6.0     0.9    -      -       -      -
    485B  HIS*     5.4     0.2    +      -       -      -
    544B  ARG*     6.0     0.2    -      -       -      +
    547B  ARG      3.9    13.0    +      -       -      +
    548B  THR*     3.3    17.4    +      -       +      +
    549B  GLU      3.2     0.6    -      -       -      -
    550B  VAL*     1.3    80.0    -      -       -      +
    552B  GLY*     1.3    57.9    +      -       -      +
    554B  THR*     4.5     2.8    -      -       -      -
    555B  ALA*     3.2    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 552 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    485B  HIS*     3.1    31.3    -      -       -      +
    488B  TYR*     5.1     3.4    -      -       -      -
    489B  MET*     3.7    12.3    -      -       -      -
    548B  THR      3.3     8.7    +      -       -      -
    549B  GLU      3.4     0.4    +      -       -      -
    550B  VAL      3.2     0.4    -      -       -      -
    551B  ALA*     1.3    79.4    -      -       -      +
    553B  MET*     1.3    58.8    +      -       -      +
    555B  ALA*     3.5     6.8    -      -       -      +
    556B  GLN*     3.0    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 553 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    489B  MET*     3.4    30.9    -      -       +      +
    549B  GLU*     3.3    10.7    +      -       +      +
    550B  VAL*     3.5    12.3    +      -       +      +
    551B  ALA      3.4     0.2    -      -       -      -
    552B  GLY*     1.3    74.4    -      -       -      +
    554B  THR*     1.3    62.0    +      -       -      +
    555B  ALA      3.0     1.3    -      -       -      -
    556B  GLN*     2.9    26.1    -      -       -      +
    557B  ILE*     2.8    48.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 554 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339B  GLN*     5.4     5.9    +      -       -      +
    342B  ASN*     3.7    28.2    +      -       -      +
    343B  LEU*     4.0    19.7    +      -       +      -
    346B  ASP*     3.5    27.8    -      -       +      +
    550B  VAL*     3.2    23.8    +      -       -      +
    551B  ALA*     4.7     3.6    -      -       -      -
    553B  MET*     1.3    79.8    -      -       -      +
    555B  ALA*     1.3    59.6    +      -       -      +
    557B  ILE*     3.9     7.4    -      -       -      +
    558B  ASN*     3.2    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 555 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346B  ASP*     3.9    11.6    +      -       -      +
    485B  HIS*     3.4    35.2    -      -       +      +
    551B  ALA      3.2    20.5    +      -       -      +
    552B  GLY      3.5     4.9    -      -       -      +
    553B  MET      3.0     0.2    -      -       -      -
    554B  THR*     1.3    77.5    -      -       -      +
    556B  GLN*     1.3    63.2    +      -       -      +
    558B  ASN*     3.4     1.9    +      -       -      +
    559B  ARG*     3.1    36.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 556 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    482B  ARG*     3.9    31.2    +      -       +      +
    485B  HIS*     4.1     4.9    -      -       +      +
    486B  LYS*     3.0    42.9    -      -       +      +
    489B  MET*     3.2    22.7    -      -       -      +
    552B  GLY      3.0    10.4    +      -       -      +
    553B  MET*     2.9    44.8    -      -       -      +
    555B  ALA*     1.3    73.9    -      -       -      +
    557B  ILE*     1.3    71.8    +      -       +      +
    559B  ARG*     3.4     8.6    +      -       -      +
    560B  LYS*     2.9    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 557 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343B  LEU*     3.8    23.8    -      -       +      -
    482B  ARG*     6.3     0.2    -      -       -      +
    553B  MET*     2.8    49.2    +      -       +      +
    554B  THR*     3.9     6.7    -      -       -      +
    556B  GLN*     1.3    81.7    -      -       +      +
    558B  ASN*     1.3    57.5    +      -       -      +
    560B  LYS*     3.3    20.7    -      -       +      +
    561B  LEU*     2.9    39.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 558 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343B  LEU*     3.2    29.6    -      -       -      +
    346B  ASP*     2.8    25.1    -      -       -      +
    347B  MET*     3.1    50.0    +      -       +      +
    350B  TYR*     5.9     1.6    -      -       +      -
    554B  THR      3.2    10.0    +      -       -      +
    555B  ALA      3.7     4.3    -      -       -      +
    556B  GLN      3.2     0.4    -      -       -      -
    557B  ILE*     1.3    77.7    -      -       -      +
    559B  ARG*     1.3    71.8    +      -       -      +
    560B  LYS      3.1     0.2    +      -       -      -
    561B  LEU*     3.1    10.5    +      -       -      +
    562B  LEU*     2.9    29.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 559 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346B  ASP*     4.5     8.1    +      -       -      -
    350B  TYR*     3.2    40.1    -      -       -      +
    478B  VAL*     2.7    46.7    -      -       +      +
    481B  GLN*     2.5    38.6    +      -       -      -
    482B  ARG*     3.5    23.6    -      -       +      +
    485B  HIS*     3.4    28.6    +      -       -      -
    555B  ALA*     3.1    27.5    +      -       -      +
    556B  GLN      3.6     8.7    -      -       -      +
    558B  ASN*     1.3    80.9    -      -       -      +
    560B  LYS*     1.3    61.9    +      -       -      +
    562B  LEU*     4.5     1.6    -      -       -      -
    563B  ILE*     2.9    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 560 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282B  PHE*     4.4    20.9    -      -       -      -
    482B  ARG*     3.0    37.4    -      -       -      +
    556B  GLN      2.9    12.7    +      -       -      +
    557B  ILE*     3.3    25.8    -      -       +      +
    559B  ARG*     1.3    73.6    -      -       -      +
    561B  LEU*     1.3    68.7    +      -       +      +
    562B  LEU      2.7    13.5    +      -       -      -
    563B  ILE*     2.7    19.7    +      -       -      +
    564B  ASN*     3.0    27.4    +      -       -      +
    907B  DTP      3.0    22.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 561 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280B  PHE*     4.0    21.8    -      -       +      -
    282B  PHE*     3.9    31.4    -      -       +      -
    343B  LEU*     3.7    38.6    -      -       +      -
    347B  MET*     5.3     3.4    -      -       -      -
    557B  ILE*     2.9    23.8    +      -       +      +
    558B  ASN*     3.4    12.1    -      -       -      +
    560B  LYS*     1.3    89.7    -      -       +      +
    562B  LEU*     1.3    63.2    +      -       -      +
    564B  ASN*     3.5    14.9    +      -       +      +
    565B  SER*     3.5    14.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 562 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347B  MET*     3.3    30.1    -      -       +      -
    350B  TYR*     3.2    34.8    -      -       +      -
    364B  THR*     3.6    10.5    -      -       +      -
    365B  TRP*     3.4    22.9    +      -       +      +
    368B  ILE*     3.6    17.9    -      -       +      -
    478B  VAL*     3.9    21.1    -      -       +      -
    558B  ASN      2.9    17.3    +      -       -      +
    559B  ARG*     3.7     9.9    -      -       -      +
    560B  LYS      2.7     3.8    +      -       -      -
    561B  LEU*     1.3    65.9    -      -       -      +
    563B  ILE*     1.3    57.8    +      -       -      +
    564B  ASN      2.9     1.3    -      -       -      -
    565B  SER*     2.7    35.2    +      -       -      +
    566B  LEU      3.0     6.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 563 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365B  TRP*     4.6     1.8    -      -       -      -
    414B  SER*     4.6     7.4    -      -       -      -
    417B  PRO*     3.8    32.1    -      -       +      +
    475B  ILE*     3.3    28.7    -      -       +      -
    478B  VAL*     3.6    17.5    -      -       +      +
    479B  PHE*     3.4    30.3    -      -       +      -
    482B  ARG*     4.7    12.8    -      -       -      +
    559B  ARG      2.9    24.0    -      -       -      +
    560B  LYS*     2.7    13.5    +      -       -      +
    562B  LEU*     1.3    76.4    -      -       -      +
    564B  ASN*     1.3    67.3    +      -       -      +
    565B  SER      3.3     4.2    +      -       -      -
    566B  LEU*     3.7     9.6    +      -       -      +
    567B  TYR*     4.7     2.8    +      -       -      +
    907B  DTP      5.2     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 564 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    414B  SER*     5.6     0.5    -      -       -      -
    417B  PRO*     5.8     0.2    -      -       -      +
    482B  ARG*     5.0     0.6    -      -       -      +
    560B  LYS*     3.0    45.9    +      -       -      +
    561B  LEU*     3.6    12.9    -      -       +      +
    562B  LEU      2.8     2.0    +      -       -      -
    563B  ILE*     1.3    89.0    -      -       -      +
    565B  SER*     1.3    58.5    +      -       -      +
    567B  TYR*     5.4     1.3    -      -       -      -
    907B  DTP      3.7    46.9    +      -       +      +
      2G    G      3.3    17.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 565 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361B  PRO*     3.8    29.9    -      -       -      +
    365B  TRP*     3.5    10.7    +      -       -      -
    561B  LEU      3.5    10.2    +      -       -      -
    562B  LEU*     2.7    19.4    +      -       -      +
    563B  ILE      3.3     0.2    +      -       -      -
    564B  ASN*     1.3    75.1    -      -       -      +
    566B  LEU*     1.3    71.0    +      -       -      +
    567B  TYR      3.2     2.2    -      -       -      +
    568B  GLY*     3.1     4.0    +      -       -      +
    569B  ALA*     3.1    21.1    +      -       -      +
      2G    G      3.9    17.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 566 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365B  TRP*     3.4    55.9    -      -       +      +
    369B  ILE*     5.4     1.1    -      -       +      -
    417B  PRO*     5.8     3.4    -      -       +      -
    420B  ILE*     4.5     8.5    -      -       +      -
    471B  VAL*     4.3    20.4    -      -       +      +
    475B  ILE*     3.8    33.7    -      -       +      -
    562B  LEU      3.0     4.4    +      -       -      -
    563B  ILE*     3.7    10.5    +      -       -      +
    565B  SER*     1.3    79.9    -      -       -      +
    567B  TYR*     1.3    58.7    +      -       -      +
    569B  ALA*     3.0     3.9    +      -       +      +
    570B  LEU*     2.7    46.0    +      -       +      +
    575B  PHE*     4.8     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 567 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    391B  TYR*     2.4    46.8    +      +       -      -
    416B  TYR*     4.2    35.7    -      +       +      -
    417B  PRO*     6.0     3.5    -      -       +      +
    420B  ILE*     5.7     2.2    -      -       +      +
    563B  ILE      4.7     3.1    +      -       -      +
    564B  ASN      6.2     0.7    -      -       -      -
    565B  SER      3.2     1.4    -      -       -      +
    566B  LEU*     1.3    80.1    -      -       -      +
    568B  GLY*     1.3    54.3    +      -       -      +
    570B  LEU*     2.8    15.8    +      -       +      +
    571B  GLY*     2.7    36.3    +      -       -      -
    583B  ALA*     4.7     6.1    -      -       -      -
    586B  ILE*     4.5    30.7    -      -       +      -
    587B  THR*     3.3    17.3    -      -       +      +
    907B  DTP      4.9     8.3    -      +       +      -
      3G    T      3.2    29.4    -      -       -      -
      4G  CTG      5.3     3.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 568 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    565B  SER*     3.1     9.8    +      -       -      +
    567B  TYR*     1.3    80.0    -      -       -      +
    569B  ALA*     1.3    60.2    +      -       -      +
    572B  ASN*     3.3    18.5    +      -       -      +
      2G    G      3.6    24.4    -      -       -      +
      3G    T      3.5    37.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 569 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361B  PRO*     4.2     4.9    -      -       +      +
    362B  ILE*     3.5    41.3    -      -       +      +
    365B  TRP*     4.9     2.5    -      -       +      -
    565B  SER      3.1     9.1    +      -       -      +
    566B  LEU*     3.0    10.8    +      -       -      +
    568B  GLY*     1.3    72.8    -      -       -      +
    570B  LEU*     1.3    58.4    +      -       -      +
    572B  ASN*     2.7    27.7    +      -       -      +
    575B  PHE*     3.3    27.2    -      -       +      +
      2G    G      4.3     2.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 570 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420B  ILE*     3.5    32.1    -      -       +      -
    427B  PRO*     6.0     0.9    -      -       +      -
    471B  VAL*     4.0    21.1    -      -       +      -
    566B  LEU*     2.7    32.3    +      -       +      +
    567B  TYR*     2.8    19.7    +      -       +      +
    569B  ALA*     1.3    73.7    -      -       -      +
    571B  GLY*     1.3    54.0    -      -       -      +
    572B  ASN      3.2     0.4    -      -       -      -
    575B  PHE*     3.8    21.7    -      -       +      -
    577B  TYR      4.3    14.8    -      -       -      +
    578B  TYR*     3.4    21.5    -      -       -      -
    579B  ASP      4.6     2.0    +      -       -      +
    582B  ASN*     6.1     4.5    -      -       +      -
    583B  ALA*     4.5     8.7    -      -       +      +
    586B  ILE*     4.2    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 571 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    391B  TYR*     3.5    32.4    -      -       -      -
    567B  TYR*     2.7    18.3    +      -       -      -
    568B  GLY      3.8     4.5    -      -       -      -
    570B  LEU*     1.3    72.5    -      -       -      +
    572B  ASN*     1.3    58.7    +      -       -      +
    573B  VAL      3.8     0.9    +      -       -      -
    578B  TYR*     3.5    16.2    -      -       -      -
    583B  ALA*     4.6     4.9    -      -       -      -
      3G    T      3.6    16.1    -      -       -      +
----------------------------------------------------------
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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