Contacts of the helix formed by residues 50 - 75 (chain D) in PDB entry 2RHM


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 ASP 50 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49D  SER*     1.3    92.7    +      -       -      +
     51D  ARG*     1.3    60.1    +      -       -      +
     52D  GLU*     3.4    13.4    +      -       -      +
     53D  TRP*     3.0    20.4    +      -       -      +
     54D  SER*     3.0    26.2    +      -       -      -
    133D  GLY      4.5     0.9    -      -       -      +
    135D  CYS*     3.7    12.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 51 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50D  ASP*     1.3    74.2    -      -       -      +
     52D  GLU*     1.3    60.7    +      -       -      +
     54D  SER*     3.3     5.0    +      -       -      -
     55D  ARG*     2.9    48.6    +      -       +      +
    134D  HIS      5.0     0.4    -      -       -      -
    135D  CYS*     4.0    23.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 52 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50D  ASP*     3.3    14.0    +      -       -      +
     51D  ARG*     1.3    79.0    -      -       -      +
     53D  TRP*     1.3    65.8    +      -       -      +
     55D  ARG*     3.2    29.5    +      -       -      +
     56D  ARG*     2.9    65.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 53 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  LEU*     4.0    16.6    -      -       +      -
     53C  TRP*     3.9    25.6    -      +       -      -
     42D  MSE      5.7     0.2    -      -       -      -
     43D  PHE*     4.0    11.3    -      +       -      -
     46D  LEU*     4.1    24.7    -      -       +      -
     47D  GLY      3.0    19.6    +      -       -      -
     48D  TRP*     3.5    23.1    -      -       +      +
     49D  SER*     3.3    24.0    -      -       -      +
     50D  ASP*     3.0    12.2    +      -       -      +
     52D  GLU*     1.3    79.6    +      -       -      +
     54D  SER*     1.3    58.5    +      -       -      +
     56D  ARG*     3.1    45.8    +      -       +      +
     57D  VAL*     2.8    49.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 54 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39D  LYS*     3.0    28.6    +      -       -      -
     43D  PHE*     4.0    11.4    -      -       -      -
     50D  ASP      3.0    10.2    +      -       -      -
     51D  ARG*     3.5    10.1    -      -       -      -
     53D  TRP*     1.3    77.9    -      -       -      +
     55D  ARG*     1.3    55.2    +      -       -      +
     58D  GLY*     2.8    24.8    +      -       -      -
    133D  GLY      3.6    12.6    -      -       -      -
    134D  HIS*     2.8    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 55 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39D  LYS*     5.4     0.2    -      -       -      +
     51D  ARG*     2.9    37.1    +      -       +      +
     52D  GLU*     3.2    38.1    +      -       +      +
     54D  SER*     1.3    73.7    -      -       -      +
     56D  ARG*     1.3    57.0    +      -       -      +
     58D  GLY*     3.2     2.1    +      -       -      -
     59D  ALA*     2.9    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 56 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  GLY      3.5    15.9    -      -       -      +
     46C  LEU*     3.2    43.3    +      -       +      +
     53C  TRP*     6.1     0.2    -      -       -      -
     52D  GLU*     2.9    47.8    +      -       -      +
     53D  TRP*     3.4    31.1    -      -       +      +
     55D  ARG*     1.3    78.5    -      -       -      +
     57D  VAL*     1.3    56.2    +      -       -      +
     59D  ALA*     3.3     7.4    +      -       +      +
     60D  THR*     2.9    31.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 57 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  LEU*     4.0    12.1    -      -       +      -
     39D  LYS*     3.8    36.3    -      -       +      +
     42D  MSE      3.7    18.5    -      -       +      +
     43D  PHE*     3.8    15.5    -      -       +      -
     53D  TRP*     2.8    59.8    +      -       +      +
     54D  SER      3.8     3.1    -      -       -      +
     56D  ARG*     1.3    71.2    -      -       -      +
     58D  GLY*     1.3    53.1    +      -       -      +
     60D  THR*     3.2     3.8    +      -       -      -
     61D  ALA*     2.7    33.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 58 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  LYS*     4.1     8.2    -      -       -      +
     39D  LYS*     3.6    26.3    -      -       -      +
     54D  SER      2.8    13.8    +      -       -      -
     55D  ARG*     3.2     3.8    +      -       -      -
     57D  VAL*     1.3    75.7    -      -       -      +
     59D  ALA*     1.3    60.7    +      -       -      +
     61D  ALA*     3.3     2.8    +      -       -      +
     62D  ILE*     3.0    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 59 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  GLY*     5.7     2.7    -      -       -      +
     55D  ARG      2.9    16.5    +      -       -      +
     56D  ARG*     3.6     7.6    -      -       -      +
     58D  GLY*     1.3    75.6    -      -       -      +
     60D  THR*     1.3    61.6    +      -       -      +
     62D  ILE*     3.4     9.1    +      -       -      +
     63D  MSE      3.2    29.9    +      -       -      +
     93D  ARG*     5.9     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 60 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  VAL*     4.0     9.9    -      -       +      +
     42C  MSE      3.8    30.1    -      -       +      +
     45C  GLY*     3.2    22.9    -      -       -      -
     46C  LEU*     3.3    10.4    -      -       +      +
     42D  MSE      3.8    20.9    -      -       -      -
     56D  ARG      2.9    17.8    +      -       -      -
     57D  VAL      3.6     4.5    -      -       -      -
     59D  ALA*     1.3    74.7    -      -       -      +
     61D  ALA*     1.3    58.5    +      -       -      +
     63D  MSE      2.9    13.8    +      -       -      +
     64D  MSE      2.9    25.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 61 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  LYS*     3.7    27.8    -      -       +      +
     38D  PHE*     3.8    12.0    -      -       +      -
     39D  LYS*     3.7    11.2    -      -       +      -
     42D  MSE      3.7    12.5    -      -       +      +
     57D  VAL      2.7    20.7    +      -       -      +
     58D  GLY      3.6     4.9    -      -       -      +
     60D  THR*     1.3    71.6    -      -       -      +
     62D  ILE*     1.3    57.3    +      -       -      +
     64D  MSE      3.1     8.0    +      -       -      +
     65D  LEU*     2.9    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 62 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  LYS*     3.6    27.6    -      -       +      +
     58D  GLY      3.0    16.5    +      -       -      +
     59D  ALA*     3.5    12.3    -      -       -      +
     61D  ALA*     1.3    75.6    -      -       -      +
     63D  MSE      1.3    64.8    +      -       +      +
     65D  LEU*     3.2    16.2    +      -       +      +
     66D  TYR*     3.1    45.8    +      -       +      -
     83D  SER*     3.8    14.1    -      -       -      +
     85D  PHE*     4.7     6.1    -      -       +      -
     90D  ASP*     4.5    11.7    -      -       -      +
     93D  ARG*     3.4    34.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with MSE 63 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  VAL*     2.9    43.4    -      -       +      +
     44C  ASP*     3.7    15.0    -      -       +      +
     45C  GLY*     3.6    26.5    -      -       -      +
     59D  ALA*     3.2    18.0    +      -       -      +
     60D  THR*     2.9    11.9    +      -       -      +
     62D  ILE*     1.3    78.9    -      -       +      +
     64D  MSE      1.3    55.5    +      -       -      +
     66D  TYR*     3.6     4.9    +      -       -      +
     67D  HIS*     3.1    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MSE 64 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38C  PHE*     3.4    52.7    -      -       +      +
     41C  VAL*     3.8    28.5    -      -       +      -
     42C  MSE      5.1     5.4    -      -       +      -
     64C  MSE      4.2    17.7    -      -       +      -
     38D  PHE*     3.4    21.3    -      -       +      -
     42D  MSE      5.1     5.2    -      -       +      -
     60D  THR*     2.9    20.2    +      -       +      +
     61D  ALA*     3.1     6.0    +      -       -      +
     63D  MSE      1.3    72.5    -      -       -      +
     65D  LEU*     1.3    66.4    +      -       -      +
     67D  HIS*     3.6     4.0    -      -       +      +
     68D  THR*     2.9    54.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 65 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33D  LEU*     3.7    27.9    -      -       +      +
     34D  SER      3.7    20.0    -      -       -      -
     35D  LYS*     3.8    24.7    -      -       +      +
     38D  PHE*     3.5    34.3    -      -       +      -
     61D  ALA      2.9    11.7    +      -       -      +
     62D  ILE*     3.2    21.3    +      -       +      +
     64D  MSE      1.3    75.9    -      -       -      +
     66D  TYR*     1.3    59.2    +      -       +      +
     69D  ALA*     2.8    32.2    +      -       -      +
     81D  MSE      3.9    26.2    -      -       +      +
     82D  GLU      4.1     6.3    -      -       -      +
     83D  SER*     4.6     3.4    -      -       -      -
     85D  PHE*     4.7     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 66 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  ILE*     3.1    37.1    +      -       +      +
     63D  MSE      4.2     4.7    -      -       -      +
     65D  LEU*     1.3    80.8    -      -       +      +
     67D  HIS*     1.3    61.8    +      -       -      +
     69D  ALA*     3.8     4.0    -      -       -      +
     70D  ALA*     3.1    23.9    +      -       -      +
     81D  MSE      4.2    10.5    -      -       +      -
     85D  PHE*     4.1     2.0    -      +       -      -
     90D  ASP*     2.9    31.4    +      -       -      +
     93D  ARG*     3.5    54.3    -      -       +      +
     94D  MSE      3.4    38.0    -      -       +      +
     97D  LEU*     3.8    22.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 67 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32C  LEU      5.3     5.3    +      -       -      -
     34C  SER      5.8     0.2    +      -       -      -
     37C  ALA*     4.0    22.0    -      -       +      +
     38C  PHE*     3.7    37.6    -      +       -      -
     41C  VAL*     4.0    21.6    -      -       +      +
     63D  MSE      3.1    18.9    +      -       -      +
     64D  MSE      3.6     9.2    -      -       +      +
     66D  TYR*     1.3    79.3    -      -       -      +
     68D  THR*     1.3    66.7    +      -       -      +
     70D  ALA*     3.4    15.1    +      -       -      +
     71D  THR*     3.6    10.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 68 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33C  LEU*     4.6     7.6    -      -       +      -
     38C  PHE*     4.0     7.1    -      -       -      -
     68C  THR*     3.3    32.0    +      -       +      +
     33D  LEU*     3.9    13.5    -      -       +      -
     38D  PHE*     4.3     4.3    -      -       -      -
     64D  MSE      2.9    37.0    +      -       -      +
     65D  LEU      4.0     2.0    -      -       -      -
     67D  HIS*     1.3    76.3    -      -       -      +
     69D  ALA*     1.3    66.8    +      -       -      +
     70D  ALA      3.3     0.2    +      -       -      -
     71D  THR*     3.3     8.8    +      -       -      +
     72D  ILE*     3.2    34.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 69 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33D  LEU*     3.7     3.5    -      -       +      +
     65D  LEU      2.8    19.8    +      -       -      +
     66D  TYR*     3.8     5.4    -      -       -      +
     67D  HIS      3.4     0.2    -      -       -      -
     68D  THR*     1.3    76.7    -      -       -      +
     70D  ALA*     1.3    57.1    +      -       -      +
     72D  ILE      3.3     0.7    +      -       -      -
     73D  LEU*     2.9    38.0    +      -       +      +
     79D  LEU*     3.7    20.7    -      -       +      +
     81D  MSE      3.9    24.2    -      -       -      -
     97D  LEU*     4.1    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 70 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66D  TYR      3.1    14.3    +      -       -      +
     67D  HIS*     3.5    11.4    -      -       -      +
     68D  THR      3.2     0.4    -      -       -      -
     69D  ALA*     1.3    75.4    -      -       -      +
     71D  THR*     1.3    57.4    +      -       -      +
     73D  LEU      3.4     0.2    +      -       -      -
     74D  GLN*     2.9    43.9    +      -       -      +
     97D  LEU*     3.7    17.7    -      -       +      +
    100D  ILE*     4.1    19.7    -      -       +      -
    101D  ALA*     3.9     5.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 71 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25C  ALA*     5.8     0.2    -      -       -      +
     30C  LEU      4.4     2.1    +      -       -      +
     31C  PRO*     3.4    10.4    -      -       +      +
     32C  LEU*     2.9    48.5    +      -       -      +
     33C  LEU*     4.4     9.0    -      -       +      -
     67D  HIS*     3.6     7.0    +      -       +      +
     68D  THR*     3.3    20.1    +      -       -      +
     70D  ALA*     1.3    78.9    -      -       -      +
     72D  ILE*     1.3    67.2    +      -       +      +
     74D  GLN*     3.6    13.6    +      -       -      +
     75D  SER*     3.3    21.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 72 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31C  PRO*     4.3    10.3    -      -       +      -
     72C  ILE*     4.0    32.1    -      -       +      -
     31D  PRO*     4.3     9.9    -      -       +      -
     33D  LEU*     4.3    12.1    -      -       +      -
     68D  THR*     3.2    31.9    +      -       +      +
     71D  THR*     1.3    77.8    -      -       +      +
     73D  LEU*     1.3    64.4    +      -       -      +
     75D  SER*     2.7    24.4    +      -       -      +
     77D  GLN*     3.3    39.0    +      -       +      +
     79D  LEU*     3.7    31.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 73 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  ARG*     4.7     1.6    +      -       -      -
      4D  PRO*     3.5    29.8    -      -       +      +
      5D  ALA      3.8    15.5    -      -       -      +
      6D  LEU*     4.5     6.7    -      -       +      -
     69D  ALA*     2.9    25.0    +      -       +      +
     72D  ILE*     1.3    75.7    -      -       -      +
     74D  GLN*     1.3    58.3    +      -       -      +
     76D  GLY*     2.9    20.3    +      -       -      -
     77D  GLN      3.5    18.2    -      -       -      +
     79D  LEU*     4.0    13.7    -      -       +      -
     97D  LEU*     4.0    18.6    -      -       +      -
    101D  ALA*     3.9    18.2    -      -       +      +
    102D  PRO      4.6     1.1    -      -       -      +
    103D  PHE*     4.0    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 74 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  ARG*     3.4    20.4    +      -       -      +
     70D  ALA*     2.9    31.7    +      -       -      +
     71D  THR*     3.9    14.4    +      -       -      +
     72D  ILE      3.2     0.4    -      -       -      -
     73D  LEU*     1.3    76.5    -      -       -      +
     75D  SER*     1.3    59.2    +      -       -      +
     76D  GLY      3.1     0.8    +      -       -      -
    100D  ILE*     2.9    43.2    +      -       -      +
    101D  ALA*     3.8     6.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 75 (chain D). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  ARG*     3.4    45.3    +      -       -      +
     30C  LEU      3.8     2.2    -      -       -      -
     31C  PRO*     3.7    26.6    -      -       -      +
     77C  GLN*     4.4     5.5    +      -       -      +
     71D  THR      3.3    12.6    +      -       -      -
     72D  ILE      2.7    19.1    +      -       -      -
     73D  LEU      3.1     0.8    -      -       -      -
     74D  GLN*     1.3    75.4    -      -       -      +
     76D  GLY*     1.3    57.8    +      -       -      +
     77D  GLN*     3.6    13.9    +      -       -      +
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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