Contacts of the helix formed by residues 42 - 69 (chain G) in PDB entry 1W88


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 SER 42 (chain G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41G  LEU*     1.3    77.4    -      -       -      +
     43G  ASP*     1.3    60.0    +      -       -      +
     44G  GLU*     3.1    19.2    +      -       -      +
     45G  GLN*     3.1    32.0    +      -       -      +
     46G  LEU*     3.0    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 43 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41G  LEU      5.2     0.5    -      -       -      +
     42G  SER*     1.3    73.5    -      -       -      +
     44G  GLU*     1.3    60.7    +      -       -      +
     46G  LEU*     3.6    10.1    +      -       -      +
     47G  LYS*     3.1    27.7    +      -       -      +
    306G  LYS*     4.1    10.4    +      -       -      -
    308G  LEU*     3.6    41.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 44 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42G  SER*     3.1     8.5    +      -       -      +
     43G  ASP*     1.3    78.7    -      -       -      +
     45G  GLN*     1.3    60.6    +      -       +      +
     47G  LYS*     3.3     6.5    +      -       -      +
     48G  GLU*     2.8    30.1    +      -       +      +
     51G  ARG*     2.8    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 45 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40G  GLU      4.6     1.7    -      -       -      +
     41G  LEU*     3.5    20.5    -      -       +      +
     42G  SER*     3.1    35.5    +      -       -      +
     44G  GLU*     1.3    76.4    -      -       +      +
     46G  LEU*     1.3    65.6    +      -       -      +
     48G  GLU*     3.2     2.9    +      -       -      -
     49G  LEU*     2.9    26.9    +      -       -      +
     90G  PHE*     3.6    28.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 46 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38G  MET*     6.4     0.2    -      -       -      -
     41G  LEU*     3.8    34.3    -      -       +      +
     42G  SER      3.0    25.2    +      -       -      +
     43G  ASP*     3.8    11.7    -      -       -      +
     45G  GLN*     1.3    75.9    -      -       -      +
     47G  LYS*     1.3    61.3    +      -       -      +
     49G  LEU*     3.8     1.7    -      -       -      +
     50G  MET*     3.4     7.4    +      -       -      +
    239G  LEU*     4.0    10.1    -      -       +      -
    299G  PHE*     3.3    43.1    -      -       +      -
    302G  PHE*     4.0    24.7    -      -       +      -
    303G  LEU*     3.7    13.3    -      -       +      +
    306G  LYS*     4.5     6.7    -      -       -      +
    308G  LEU*     4.2    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 47 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43G  ASP      3.1    18.4    +      -       -      +
     44G  GLU*     3.6     9.0    -      -       -      +
     46G  LEU*     1.3    75.9    -      -       -      +
     48G  GLU*     1.3    59.5    +      -       -      +
     50G  MET*     3.1     7.7    +      -       -      +
     51G  ARG*     2.9    50.1    +      -       -      +
    303G  LEU*     4.7     5.8    -      -       -      +
    308G  LEU*     4.4    17.3    -      -       +      +
    309G  TRP*     3.9     5.5    -      -       +      -
    313G  GLU*     4.9     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 48 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44G  GLU*     2.8    22.5    +      -       +      +
     45G  GLN*     3.7     8.1    -      -       -      +
     47G  LYS*     1.3    70.5    -      -       -      +
     49G  LEU*     1.3    57.3    +      -       -      +
     51G  ARG*     3.2    35.2    +      -       -      +
     52G  ARG*     2.9    65.5    +      -       -      +
     90G  PHE*     3.9    11.2    -      -       +      -
    110G  TRP*     5.3     2.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 49 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41G  LEU*     4.9    13.7    -      -       +      -
     45G  GLN      2.9    16.2    +      -       -      +
     46G  LEU*     3.8     5.8    -      -       -      +
     48G  GLU*     1.3    75.8    -      -       -      +
     50G  MET*     1.3    56.9    +      -       -      +
     52G  ARG*     3.4     3.6    +      -       -      +
     53G  MET*     3.0    46.6    +      -       +      +
     86G  ILE*     4.0    14.4    -      -       +      -
     87G  ALA*     3.9    17.9    -      -       +      +
     90G  PHE*     3.8    43.2    -      -       +      -
    238G  PRO*     4.3    27.1    -      -       +      +
    239G  LEU*     5.5     0.9    -      -       +      -
    242G  TYR*     5.2     2.5    -      -       +      -
    299G  PHE*     4.3    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 50 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46G  LEU      3.4     2.9    +      -       -      +
     47G  LYS      3.1     8.5    +      -       -      +
     49G  LEU*     1.3    75.5    -      -       -      +
     51G  ARG*     1.3    67.2    +      -       -      +
     53G  MET*     3.3     8.8    +      -       -      +
     54G  VAL*     2.8    49.5    +      -       +      +
    296G  LEU*     3.7    34.3    -      -       +      +
    299G  PHE*     4.0    19.5    -      -       +      -
    300G  ARG*     3.9    23.6    -      -       +      +
    303G  LEU*     3.6    22.9    -      -       +      -
    309G  TRP*     3.7    24.0    -      -       +      +
    314G  GLU*     3.9    14.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 51 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44G  GLU*     2.8    28.9    +      -       -      -
     47G  LYS*     2.9    27.2    +      -       -      +
     48G  GLU*     3.2    51.7    +      -       -      +
     50G  MET*     1.3    77.6    -      -       -      +
     52G  ARG*     1.3    51.2    +      -       -      +
     55G  TYR*     2.8    36.4    +      -       -      +
    309G  TRP*     3.8    11.4    -      -       +      -
    313G  GLU*     3.2    23.8    +      -       -      -
    317G  VAL*     3.4    35.5    -      -       +      +
    320G  GLN*     6.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 52 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48G  GLU*     2.9    51.5    +      -       -      +
     49G  LEU      3.6     1.8    -      -       -      +
     51G  ARG*     1.3    70.7    -      -       -      +
     53G  MET*     1.3    57.8    +      -       -      +
     55G  TYR*     3.3     2.4    +      -       -      +
     56G  THR*     2.8    34.6    +      -       -      -
     86G  ILE*     3.4    26.2    -      -       +      +
     89G  HIS*     3.7    29.5    +      -       -      -
     90G  PHE*     3.8    28.6    -      -       -      +
    110G  TRP*     3.9    49.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 53 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49G  LEU*     3.0    30.5    +      -       +      +
     50G  MET*     3.7    10.1    -      -       -      +
     52G  ARG*     1.3    74.6    -      -       -      +
     54G  VAL*     1.3    58.0    +      -       -      +
     56G  THR      3.3     0.5    +      -       -      -
     57G  ARG*     2.9    27.4    +      -       -      +
     82G  GLU*     3.5    21.3    -      -       +      +
     83G  ALA*     4.2    15.7    -      -       -      -
     86G  ILE*     4.0    20.9    -      -       +      -
     87G  ALA      5.4     0.2    -      -       -      -
    238G  PRO*     3.6    32.3    -      -       +      -
    295G  PRO*     4.8     4.0    -      -       -      +
    296G  LEU*     3.7    17.0    -      -       +      -
    299G  PHE*     3.5    38.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 54 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50G  MET*     2.8    53.4    +      -       +      +
     51G  ARG      3.5     3.4    -      -       -      +
     53G  MET*     1.3    70.6    -      -       -      +
     55G  TYR*     1.3    62.2    +      -       -      +
     57G  ARG*     3.5     5.9    +      -       -      +
     58G  ILE*     3.1    24.3    +      -       +      +
    296G  LEU*     4.0    11.2    -      -       +      -
    309G  TRP*     4.0    12.8    -      -       +      -
    314G  GLU*     4.3    15.3    -      -       +      +
    317G  VAL*     4.1    16.4    -      -       +      -
    318G  ILE*     3.9    29.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 55 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51G  ARG      2.8    21.1    +      -       -      +
     52G  ARG*     3.4     5.4    -      -       -      +
     54G  VAL*     1.3    70.5    -      -       -      +
     56G  THR*     1.3    63.4    +      -       -      +
     58G  ILE*     3.2     5.1    +      -       -      +
     59G  LEU*     2.8    43.8    +      -       +      -
    109G  ILE*     5.8     4.9    -      -       +      -
    110G  TRP*     3.7    33.7    -      +       +      -
    115G  LEU*     3.9    16.5    -      -       +      +
    317G  VAL*     4.1    10.1    -      -       +      +
    320G  GLN*     4.3    15.3    -      -       -      -
    321G  ALA*     3.5    39.1    +      -       +      +
    324G  GLU*     2.9    40.4    +      -       -      +
    325G  ILE*     4.7     1.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 56 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52G  ARG      2.8    23.2    +      -       -      -
     53G  MET      3.7     4.0    -      -       -      -
     55G  TYR*     1.3    72.8    -      -       -      +
     57G  ARG*     1.3    65.5    +      -       -      +
     59G  LEU*     3.1    12.8    +      -       +      +
     60G  ASP*     2.9    22.3    +      -       -      +
     78G  THR*     4.4     8.1    -      -       -      +
     82G  GLU*     4.1    11.9    -      -       +      -
     85G  GLN*     4.8     3.4    -      -       -      +
     86G  ILE*     3.3    15.3    -      -       +      +
    106G  PRO*     3.8    31.9    -      -       +      -
    110G  TRP*     3.1    22.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 57 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53G  MET      2.9    17.5    +      -       -      +
     54G  VAL      3.5     6.3    -      -       -      +
     56G  THR*     1.3    74.2    -      -       -      +
     58G  ILE*     1.3    65.2    +      -       +      +
     60G  ASP*     3.2     6.4    +      -       -      +
     61G  GLN*     3.0    46.2    +      -       -      +
     79G  ALA*     4.0    17.9    -      -       -      +
     80G  GLY*     3.8    11.7    -      -       -      +
     82G  GLU*     2.7    45.0    +      -       -      +
    294G  ASP*     2.7    45.4    +      -       -      -
    295G  PRO*     4.1     2.0    -      -       -      +
    296G  LEU*     3.6    28.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 58 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54G  VAL*     3.1    17.1    +      -       +      +
     55G  TYR      3.5     6.5    -      -       -      +
     57G  ARG*     1.3    76.2    -      -       +      +
     59G  LEU*     1.3    61.6    +      -       -      +
     61G  GLN*     3.1    26.1    +      -       +      +
     62G  ARG*     2.8    30.9    +      -       +      +
    318G  ILE*     3.8    43.3    -      -       +      -
    321G  ALA*     3.8    20.6    -      -       +      -
    322G  LYS*     4.0    28.3    -      -       +      +
    325G  ILE*     4.5     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 59 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55G  TYR*     2.8    27.3    +      -       +      +
     56G  THR*     3.3    15.3    -      -       +      +
     58G  ILE*     1.3    72.7    -      -       -      +
     60G  ASP*     1.3    51.1    +      -       -      +
     62G  ARG*     3.4     0.9    +      -       -      +
     63G  SER*     2.8    44.7    +      -       -      +
     75G  TYR*     5.8     1.6    -      -       +      +
    105G  VAL*     6.4     0.2    -      -       +      -
    106G  PRO*     4.8    16.8    -      -       +      -
    109G  ILE*     3.9    27.4    -      -       +      -
    110G  TRP*     6.3     0.9    -      -       -      +
    115G  LEU*     3.6    24.2    -      -       +      -
    119G  PHE*     3.8    23.1    -      -       +      -
    325G  ILE*     3.7    21.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 60 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56G  THR      2.9    11.2    +      -       -      +
     57G  ARG*     3.5    10.1    -      -       -      +
     59G  LEU*     1.3    73.7    -      -       -      +
     61G  GLN*     1.3    59.6    +      -       -      +
     63G  SER*     3.3     0.5    +      -       -      -
     64G  ILE*     2.9    42.8    +      -       -      +
     75G  TYR*     2.3    46.5    +      -       -      +
     77G  PRO*     3.3     3.8    -      -       -      +
     78G  THR*     3.3    25.4    +      -       -      +
     79G  ALA*     2.8    36.9    +      -       +      +
     82G  GLU*     5.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 61 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57G  ARG*     3.0    44.4    +      -       -      +
     58G  ILE*     3.1    27.6    +      -       +      +
     60G  ASP*     1.3    75.8    -      -       +      +
     62G  ARG*     1.3    60.8    +      -       -      +
     64G  ILE*     3.7    10.7    +      -       +      +
     65G  SER*     3.2    23.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 62 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58G  ILE*     2.8    19.5    +      -       +      +
     59G  LEU      3.8     3.1    -      -       -      +
     61G  GLN*     1.3    76.7    -      -       -      +
     63G  SER*     1.3    54.2    +      -       -      +
     65G  SER*     3.4     7.4    +      -       -      -
     66G  LEU*     2.8    42.4    +      -       +      +
    322G  LYS*     6.3     2.0    -      -       +      -
    325G  ILE*     3.9    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 63 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59G  LEU*     2.8    33.6    +      -       -      +
     60G  ASP      3.8     0.2    -      -       -      -
     62G  ARG*     1.3    71.2    -      -       -      +
     64G  ILE*     1.3    55.2    +      -       -      +
     66G  LEU*     3.5     2.7    -      -       -      +
     67G  ASN*     2.7    36.6    +      -       -      +
     72G  LEU*     3.8    23.1    -      -       -      +
     75G  TYR*     3.6    34.5    -      -       -      -
    119G  PHE*     4.0    15.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 64 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60G  ASP*     2.9    53.2    +      -       -      +
     61G  GLN*     4.0    10.3    -      -       +      +
     63G  SER*     1.3    71.2    -      -       -      +
     65G  SER*     1.3    63.9    +      -       -      +
     67G  ASN*     3.3     3.9    +      -       -      +
     68G  ARG*     3.0    63.3    +      -       +      +
     75G  TYR*     3.8    14.1    -      -       +      -
     77G  PRO*     4.5    14.8    -      -       +      -
     79G  ALA*     5.7     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 65 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  GLN*     4.0    18.6    +      -       -      +
     61G  GLN      3.2    17.2    +      -       -      -
     62G  ARG*     3.4     8.6    +      -       -      -
     64G  ILE*     1.3    80.8    -      -       -      +
     66G  LEU*     1.3    61.1    +      -       -      +
     68G  ARG*     3.3    12.5    +      -       -      +
     69G  GLN*     3.0    43.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 66 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62G  ARG*     2.8    33.5    +      -       +      +
     63G  SER*     3.1     8.0    +      -       -      +
     65G  SER*     1.3    72.0    -      -       -      +
     67G  ASN*     1.3    64.2    +      -       -      +
     69G  GLN*     3.2    19.0    +      -       -      +
     71G  ARG*     2.9    52.7    +      -       +      +
     72G  LEU*     3.9    18.8    -      -       +      -
    119G  PHE*     4.8     3.8    -      -       +      -
    325G  ILE*     4.1    18.4    -      -       +      -
    329G  ILE*     3.0    39.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 67 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63G  SER      2.7    19.3    +      -       -      +
     64G  ILE*     3.5     7.9    -      -       -      +
     66G  LEU*     1.3    71.0    -      -       -      +
     68G  ARG*     1.3    58.6    +      -       +      +
     70G  GLY*     2.8    26.0    +      -       -      -
     72G  LEU*     3.8    15.8    +      -       +      +
     73G  GLY      2.4    30.9    +      -       -      +
     75G  TYR*     3.3    30.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 68 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  ARG*     3.2    62.7    +      -       +      +
     69A  GLN*     4.4    12.9    +      -       -      +
     70A  GLY*     5.1     1.0    -      -       -      +
     64G  ILE*     3.0    43.6    +      -       +      +
     65G  SER*     3.5    11.1    -      -       -      +
     66G  LEU      3.3     0.2    -      -       -      -
     67G  ASN*     1.3    79.1    -      -       +      +
     69G  GLN*     1.3    57.6    +      -       -      +
     70G  GLY      3.1     3.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 69 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  ARG*     4.9     4.3    +      -       -      -
     65A  SER*     3.4    24.2    +      -       -      +
     68A  ARG*     5.0    10.8    +      -       -      +
     69A  GLN*     3.4    27.6    +      -       +      +
     65G  SER*     3.0    36.8    +      -       -      +
     66G  LEU*     3.2    20.6    +      -       -      +
     68G  ARG*     1.3    75.1    -      -       -      +
     70G  GLY*     1.3    60.4    +      -       -      +
     71G  ARG*     3.5    29.4    +      -       +      +
----------------------------------------------------------
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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