Contacts of the helix formed by residues 48 - 71 (chain Y) in PDB entry 3D29


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with GLY 48 (chain Y).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46Y  ALA      4.1     0.2    +      -       -      -
     47Y  GLY*     1.3    69.6    -      -       -      -
     49Y  ALA*     1.3    65.1    +      -       -      -
     50Y  ALA      3.5     1.8    -      -       -      -
     51Y  ASP*     3.2    11.0    +      -       -      +
     52Y  CYS*     2.9    26.5    +      -       -      -
     96Y  SER*     2.8    26.8    +      -       -      -
      1e  ASN      3.8     1.1    -      -       -      -
      2e  GLN*     3.8    16.6    -      -       -      -
      3e  LEU*     4.8     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 49 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20Y  ALA*     5.9     0.2    -      -       +      -
     47Y  GLY      3.4     3.6    +      -       -      -
     48Y  GLY*     1.3    70.7    -      -       -      +
     50Y  ALA*     1.3    65.6    +      -       -      +
     52Y  CYS*     3.9     0.7    -      -       -      +
     53Y  GLN*     3.0    31.2    +      -       -      +
    114Z  ASP*     4.4     0.2    -      -       -      +
    118Z  SER*     3.3    21.8    -      -       -      +
      1e  ASN*     3.0    29.5    +      -       +      +
      3e  LEU*     3.7    34.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 50 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48Y  GLY      3.5     0.4    -      -       -      -
     49Y  ALA*     1.3    78.5    -      -       -      +
     51Y  ASP*     1.3    57.5    +      -       -      +
     53Y  GLN*     4.5     2.5    -      -       -      -
     54Y  PHE*     2.8    35.7    +      -       -      +
     84Z  GLN*     5.8     0.9    -      -       -      +
     88Z  TYR*     3.9     8.7    -      -       +      -
    114Z  ASP*     4.2     1.2    +      -       -      -
    116Z  VAL*     3.4    47.6    -      -       +      +
    117Z  GLY      4.4     1.1    -      -       -      -
    118Z  SER*     3.6    21.7    -      -       -      +
      1e  ASN      4.8     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 51 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48Y  GLY*     3.2    13.3    +      -       -      +
     50Y  ALA*     1.3    77.6    -      -       -      +
     52Y  CYS*     1.3    63.0    +      -       -      +
     55Y  TRP*     3.1    30.5    +      -       -      +
     95Y  LEU*     3.5     8.4    -      -       -      +
     96Y  SER*     2.9    36.6    +      -       -      +
     97Y  MET*     3.7    11.1    -      -       -      +
     88Z  TYR*     2.6    32.0    +      -       -      +
     91Z  ARG*     2.8    30.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 52 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45Y  MET*     3.6    26.5    -      -       +      -
     46Y  ALA      3.1    41.1    -      -       -      -
     48Y  GLY      2.9    20.8    +      -       -      +
     49Y  ALA      3.9     1.3    -      -       -      +
     51Y  ASP*     1.3    73.0    -      -       -      +
     53Y  GLN*     1.3    57.4    +      -       -      +
     56Y  GLU*     2.7    45.9    +      -       -      +
     97Y  MET*     3.5    25.6    -      -       -      -
     98Y  GLY      4.7     2.5    -      -       -      -
     99Y  THR*     5.3     0.9    -      -       -      -
      3e  LEU*     4.7     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 53 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31Y  VAL*     5.1    12.3    -      -       -      +
     35Y  ILE*     5.3     0.7    -      -       -      +
     45Y  MET*     3.4    25.0    -      -       +      +
     49Y  ALA*     3.0    17.7    +      -       -      +
     50Y  ALA*     4.1     0.7    -      -       -      +
     52Y  CYS*     1.3    81.3    -      -       -      +
     54Y  PHE*     1.3    55.9    +      -       -      +
     56Y  GLU*     4.9     0.4    -      -       -      -
     57Y  THR*     2.7    33.8    +      -       -      +
     84Z  GLN*     3.4    21.0    +      -       -      +
    118Z  SER*     2.8    26.0    +      -       -      -
    119Z  TYR*     3.2    34.8    +      -       -      +
    120Z  GLU*     5.6     1.4    +      -       -      -
      3e  LEU*     5.4     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 54 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101R  LEU*     5.3     3.3    -      -       +      +
     50Y  ALA*     2.8    24.2    +      -       -      +
     51Y  ASP      4.3     0.4    -      -       -      +
     53Y  GLN*     1.3    75.0    -      -       -      +
     55Y  TRP*     1.3    90.8    +      +       -      +
     57Y  THR*     3.2     6.1    +      -       -      -
     58Y  TRP*     3.0    30.5    +      +       +      +
     84Z  GLN*     4.1    25.8    -      -       +      +
     85Z  HIS*     3.7    37.2    -      +       -      -
     88Z  TYR*     3.5    55.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with TRP 55 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51Y  ASP      3.1    24.6    +      -       -      +
     54Y  PHE*     1.3   102.7    -      +       -      +
     56Y  GLU*     1.3    58.0    +      -       -      +
     58Y  TRP*     3.5    42.6    -      +       +      +
     59Y  LEU*     2.9    22.3    +      -       -      +
     83Y  LEU*     4.0     8.4    -      -       +      +
     86Y  LEU*     3.5    42.4    -      -       +      -
     90Y  TYR*     3.7    33.4    -      +       -      -
     95Y  LEU*     3.9    13.6    -      -       +      +
     97Y  MET*     3.9    25.1    -      -       +      -
     88Z  TYR*     3.0    31.6    +      +       -      -
----------------------------------------------------------
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Residues in contact with GLU 56 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35Y  ILE*     3.0    40.7    -      -       +      +
     37Y  ILE*     5.0     2.9    -      -       +      +
     43Y  GLY*     3.5    14.1    -      -       -      -
     44Y  THR      2.9     9.0    -      -       -      +
     45Y  MET*     3.4    17.8    -      -       -      +
     52Y  CYS*     2.7    28.1    +      -       -      +
     53Y  GLN*     4.6     2.2    -      -       -      +
     55Y  TRP*     1.3    72.1    -      -       -      +
     57Y  THR*     1.3    66.1    +      -       -      +
     59Y  LEU*     3.0    13.8    +      -       +      +
     60Y  GLY*     3.0    18.0    +      -       -      -
     83Y  LEU*     4.4    19.1    -      -       +      -
     97Y  MET*     5.2     1.7    -      -       +      +
     99Y  THR*     2.5    29.1    +      -       -      -
    101Y  ILE*     5.0     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 57 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101R  LEU*     3.3    22.2    -      -       +      -
     35Y  ILE*     3.9    17.6    -      -       +      +
     53Y  GLN*     2.7    24.9    +      -       -      +
     54Y  PHE*     3.2     6.6    +      -       -      -
     56Y  GLU*     1.3    77.0    -      -       -      +
     58Y  TRP*     1.3    64.3    +      -       -      +
     60Y  GLY*     3.0    11.4    +      -       -      -
     61Y  SER*     3.2    12.5    +      -       -      -
     81Z  ARG*     4.0    29.0    +      -       -      +
     84Z  GLN*     5.3     4.5    +      -       -      +
     85Z  HIS*     6.1     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 58 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101R  LEU*     4.0    26.2    -      -       +      +
     54Y  PHE*     3.0    20.2    +      +       +      +
     55Y  TRP*     3.5    42.0    -      +       +      +
     57Y  THR*     1.3    77.6    -      -       -      +
     59Y  LEU*     1.3    76.0    +      -       +      +
     61Y  SER*     2.9     6.8    +      -       -      -
     62Y  GLN*     2.9    51.3    +      -       +      +
     82Y  ILE*     3.8    32.3    -      -       +      -
     83Y  LEU*     4.8     5.6    -      -       +      -
     86Y  LEU*     3.6    38.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 59 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37Y  ILE*     3.6    26.2    -      -       +      -
     55Y  TRP      2.9    15.3    +      -       -      +
     56Y  GLU*     3.0    13.7    +      -       +      +
     58Y  TRP*     1.3    82.8    -      -       +      +
     60Y  GLY*     1.3    56.4    +      -       -      +
     62Y  GLN*     3.0     3.5    +      -       +      +
     63Y  CYS*     2.8    38.9    +      -       -      -
     79Y  ALA*     3.5    28.5    -      -       +      +
     82Y  ILE*     3.7    25.8    -      -       +      -
     83Y  LEU*     4.2    18.2    -      -       +      +
    101Y  ILE*     4.0    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 60 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35Y  ILE*     5.9     1.8    -      -       -      -
     37Y  ILE*     4.1    29.3    -      -       -      +
     56Y  GLU      3.0    12.4    +      -       -      -
     57Y  THR*     3.0     5.5    +      -       -      -
     59Y  LEU*     1.3    76.0    -      -       -      +
     61Y  SER*     1.3    56.8    +      -       -      +
     63Y  CYS*     3.3     2.1    +      -       -      +
     64Y  ARG*     3.0    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 61 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97R  VAL*     3.7    27.8    +      -       -      +
    101R  LEU*     3.4    44.2    -      -       -      +
     57Y  THR*     3.2     4.3    +      -       -      +
     58Y  TRP      2.9    10.4    +      -       -      -
     60Y  GLY*     1.3    76.3    -      -       -      +
     62Y  GLN*     1.3    69.3    +      -       -      +
     64Y  ARG*     3.4     2.8    +      -       -      +
     65Y  LEU*     3.1    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 62 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101R  LEU*     5.7     0.4    -      -       -      +
     58Y  TRP*     2.9    67.0    +      -       +      +
     59Y  LEU*     3.5     7.0    -      -       +      +
     61Y  SER*     1.3    83.1    -      -       -      +
     63Y  CYS*     1.3    62.9    +      -       -      +
     65Y  LEU*     3.4    20.0    +      -       -      +
     66Y  HIS*     3.1    21.8    +      -       -      +
     69Y  ARG*     5.0     8.0    +      -       -      -
     82Y  ILE*     4.3    24.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 63 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37Y  ILE*     4.0    23.3    -      -       +      -
     38Y  ASN*     5.5     2.0    -      -       -      +
     41Y  LEU*     4.3     0.2    -      -       -      -
     59Y  LEU*     2.8    29.6    +      -       -      +
     60Y  GLY      3.5     6.1    -      -       -      +
     61Y  SER      3.2     0.2    -      -       -      -
     62Y  GLN*     1.3    76.9    -      -       -      +
     64Y  ARG*     1.3    62.4    +      -       -      +
     66Y  HIS*     3.0    22.9    +      -       -      +
     67Y  GLU*     3.2    12.5    +      -       -      +
     74Y  ILE*     3.9    29.6    -      -       +      +
     79Y  ALA*     3.9    22.4    -      -       -      -
     82Y  ILE*     6.1     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 64 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69R  GLU*     3.0    26.9    +      -       -      -
     71R  ASP*     3.2    25.9    +      -       -      -
     72R  ARG*     3.4    12.2    -      -       -      +
     97R  VAL*     4.0    18.8    -      -       +      -
     60Y  GLY      3.0    17.0    +      -       -      +
     61Y  SER*     3.7     7.0    -      -       -      +
     62Y  GLN      3.4     0.2    -      -       -      -
     63Y  CYS*     1.3    74.6    -      -       -      +
     65Y  LEU*     1.3    63.7    +      -       -      +
     67Y  GLU*     3.2    22.5    +      -       -      +
     68Y  LEU*     3.0    45.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 65 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93R  ARG*     3.9    20.9    -      -       +      +
     94R  THR*     4.4    15.3    -      -       +      +
     97R  VAL*     3.4    37.7    -      -       +      -
     98R  THR*     6.1     0.7    -      -       -      +
     61Y  SER      3.1    16.5    +      -       -      +
     62Y  GLN*     3.5    28.7    -      -       -      +
     64Y  ARG*     1.3    76.7    -      -       -      +
     66Y  HIS*     1.3    62.0    +      -       -      +
     68Y  LEU*     3.3    11.2    +      -       +      +
     69Y  ARG*     3.0    55.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 66 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103Q  LEU*     4.1    26.0    -      -       +      +
     62Y  GLN      3.1    11.5    +      -       -      +
     63Y  CYS*     3.0    11.7    +      -       -      +
     65Y  LEU*     1.3    76.1    -      -       -      +
     67Y  GLU*     1.3    52.3    +      -       -      +
     69Y  ARG*     3.2    11.0    +      -       -      +
     70Y  GLU*     2.7    60.6    +      -       +      +
     72Y  GLU*     3.7    13.2    +      -       -      +
     73Y  ARG      4.4     2.2    +      -       -      -
     74Y  ILE*     3.4    47.4    -      -       +      +
     75Y  SER      5.0     0.8    +      -       -      -
     82Y  ILE*     6.1     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 67 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38Y  ASN*     4.2     9.0    +      -       -      -
     63Y  CYS      3.7    12.6    -      -       -      +
     64Y  ARG*     3.2    22.4    +      -       -      +
     66Y  HIS*     1.3    72.8    -      -       -      +
     68Y  LEU*     1.3    58.5    +      -       -      +
     71Y  LYS*     2.7    33.3    +      -       -      -
     72Y  GLU      3.1    21.4    +      -       -      +
     73Y  ARG*     2.6    43.8    +      -       -      +
     74Y  ILE*     3.1    13.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 68 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69R  GLU*     3.6    46.0    -      -       +      +
     70R  ILE      3.3    22.2    -      -       -      +
     71R  ASP*     4.8     0.9    -      -       -      +
     93R  ARG*     3.3    42.4    +      -       +      +
     97R  VAL*     4.2    19.5    -      -       +      -
     64Y  ARG*     3.0    44.7    +      -       -      +
     65Y  LEU*     3.7     9.0    -      -       +      +
     67Y  GLU*     1.3    76.9    -      -       -      +
     69Y  ARG*     1.3    61.8    +      -       -      +
     71Y  LYS*     4.2     9.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 69 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114Q  ARG*     4.1    17.1    +      -       -      +
     90R  GLU*     2.8    48.3    +      -       -      -
     93R  ARG*     4.0    16.2    +      -       -      +
     94R  THR*     4.7     0.2    +      -       -      -
     62Y  GLN*     5.0     8.3    +      -       -      -
     65Y  LEU*     3.0    47.5    +      -       -      +
     66Y  HIS*     3.5     8.4    -      -       -      +
     68Y  LEU*     1.3    80.3    -      -       -      +
     70Y  GLU*     1.3    77.8    +      -       +      +
     71Y  LYS*     3.5     5.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 70 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99Q  HIS*     6.3     0.2    -      -       -      -
    108Q  THR*     5.4     0.7    +      -       -      -
    111Q  TYR*     3.4    22.5    -      -       -      +
    114Q  ARG*     3.0    40.9    +      -       -      +
     66Y  HIS*     2.7    51.1    +      -       +      +
     69Y  ARG*     1.3    88.5    -      -       +      +
     71Y  LYS*     1.3    72.5    +      -       -      +
     72Y  GLU*     3.0    13.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 71 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110Q  GLU*     5.6     4.9    +      -       -      -
     65R  GLU*     3.3    36.3    +      -       -      +
     93R  ARG*     5.9     2.2    -      -       -      +
     67Y  GLU      2.7    20.6    +      -       -      +
     68Y  LEU      4.7     7.9    -      -       -      +
     69Y  ARG      3.5     6.2    -      -       -      +
     70Y  GLU*     1.3    74.7    -      -       -      +
     72Y  GLU*     1.3    56.7    +      -       -      +
----------------------------------------------------------
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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