Contacts of the helix formed by residues 187 - 210 (chain A) in PDB entry 3RFU


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 TYR 187 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  ALA*     4.8    12.1    -      -       +      +
    162A  TYR*     3.1    51.2    +      +       -      -
    163A  SER*     3.8     7.2    -      -       -      -
    177A  PHE*     6.1     0.2    -      -       -      -
    185A  ALA*     4.6     5.0    -      -       +      +
    186A  VAL*     1.3    73.0    -      -       -      +
    188A  PHE*     1.3    64.7    +      -       -      +
    189A  GLU*     3.1     3.4    -      -       -      +
    190A  ALA*     2.8    23.1    +      -       +      +
    191A  ALA*     3.0    11.9    +      -       -      +
    375A  VAL*     6.2     0.4    -      -       +      -
    376A  SER*     4.5     4.6    +      -       -      -
    379A  ILE*     4.4    31.4    -      -       +      -
    708A  LEU*     2.7    44.4    +      -       +      +
    709A  SER      3.7     2.0    -      -       -      -
    710A  PRO*     3.2    46.1    -      -       +      +
    713A  ALA*     4.8     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  VAL*     4.5     1.3    -      -       +      -
    115A  SER      3.9     1.6    -      -       -      -
    118A  GLN*     3.8    13.5    -      -       +      +
    119A  LEU*     3.3    40.6    -      -       +      -
    122A  ALA*     3.7    26.1    -      -       +      +
    160A  TRP*     3.7    31.2    -      +       +      -
    163A  SER*     2.8    30.3    -      -       -      -
    164A  MET*     3.2    31.6    -      -       +      -
    167A  VAL*     3.8     9.2    -      -       +      -
    186A  VAL*     3.2    22.4    -      -       +      +
    187A  TYR*     1.3    76.5    -      -       -      +
    189A  GLU*     1.3    64.3    +      -       -      +
    191A  ALA*     3.1     8.5    +      -       +      +
    192A  ALA*     2.9    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  VAL*     3.9    15.1    -      -       +      +
     96A  VAL*     4.0    37.3    -      -       +      +
     99A  GLU*     3.9    35.6    -      -       +      +
    100A  MET*     3.8    22.7    -      -       -      +
    118A  GLN*     4.6     2.2    -      -       -      +
    186A  VAL      4.8     1.7    +      -       -      +
    187A  TYR*     3.1     1.7    -      -       -      -
    188A  PHE*     1.3    79.1    -      -       -      +
    190A  ALA*     1.3    62.7    +      -       -      +
    192A  ALA*     3.9     0.7    -      -       -      +
    193A  VAL*     3.0    27.7    +      -       +      +
    710A  PRO*     4.6     8.9    -      -       +      +
    714A  ALA*     3.9    18.2    -      -       -      +
    717A  MET*     4.4    12.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  TYR*     2.8    23.3    +      -       +      +
    189A  GLU*     1.3    81.4    +      -       -      +
    191A  ALA*     1.3    63.0    +      -       -      +
    194A  ILE*     3.0    37.2    +      -       +      +
    379A  ILE*     4.0    22.9    -      -       +      -
    710A  PRO*     6.2     1.1    -      -       +      -
    713A  ALA*     5.0    10.3    -      -       +      -
    717A  MET*     4.2    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  ALA*     5.4     0.7    -      -       +      -
    126A  VAL*     3.5    23.6    -      -       +      -
    156A  ILE*     3.6    17.2    -      -       +      +
    159A  ALA*     4.4    18.0    -      -       +      +
    160A  TRP*     4.9     7.2    -      -       +      +
    187A  TYR      3.0    10.2    +      -       -      +
    188A  PHE*     3.1    13.9    +      -       +      +
    190A  ALA*     1.3    76.7    -      -       -      +
    192A  ALA*     1.3    64.3    +      -       -      +
    195A  THR*     3.0    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  THR*     3.3    27.6    -      -       +      +
     95A  VAL*     4.6     7.0    -      -       +      -
    122A  ALA*     4.4     6.5    -      -       +      -
    125A  VAL*     3.5    25.5    -      -       +      +
    126A  VAL*     4.2     0.6    -      -       -      +
    188A  PHE      2.9    15.4    +      -       -      +
    189A  GLU      3.9     3.1    -      -       -      +
    191A  ALA*     1.3    75.8    -      -       -      +
    193A  VAL*     1.3    63.0    +      -       -      +
    195A  THR*     2.8    18.7    +      -       -      -
    196A  THR*     2.9    14.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  THR*     4.0     7.0    -      -       +      -
     96A  VAL*     3.9    28.7    -      -       +      -
    189A  GLU*     3.0    17.2    +      -       +      +
    192A  ALA*     1.3    78.9    -      -       -      +
    194A  ILE*     1.3    65.5    +      -       -      +
    196A  THR*     3.4     4.7    +      -       -      -
    197A  LEU*     3.0    48.3    +      -       +      +
    384A  CYS*     4.5     1.1    -      -       +      -
    717A  MET*     3.3    36.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  ILE*     4.7     5.4    -      -       +      -
    156A  ILE*     3.4    27.4    -      -       +      -
    190A  ALA*     3.0    37.8    +      -       +      +
    193A  VAL*     1.3    77.5    -      -       -      +
    195A  THR*     1.3    58.8    +      -       -      +
    197A  LEU*     3.8     1.4    -      -       -      +
    198A  VAL*     2.9    33.2    +      -       +      +
    379A  ILE*     4.7     9.0    -      -       +      +
    382A  CYS*     3.7    38.6    -      -       +      +
    383A  PRO      4.7     2.0    -      -       -      +
    384A  CYS*     3.8    32.7    -      -       +      +
    717A  MET*     4.2    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  ALA*     5.1     0.3    -      -       -      +
    125A  VAL*     3.2    26.0    +      -       -      +
    126A  VAL*     4.0     9.2    -      -       +      -
    130A  GLY*     4.7    10.1    -      -       -      -
    133A  PHE*     3.6     8.0    -      -       +      -
    156A  ILE*     3.6    35.2    -      -       +      -
    191A  ALA      3.0    15.9    +      -       -      +
    192A  ALA*     2.8    17.7    +      -       -      -
    194A  ILE*     1.3    76.2    -      -       -      +
    196A  THR*     1.3    56.5    +      -       -      +
    198A  VAL*     3.0    11.0    -      -       -      +
    199A  LEU*     3.0    34.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 196 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  PHE*     3.4    20.5    -      -       -      -
     88A  ALA*     3.3    25.6    -      -       +      -
     89A  LEU*     4.3    15.8    -      -       -      +
     92A  THR*     3.1    29.5    -      -       -      +
    125A  VAL*     3.7     3.4    -      -       +      -
    192A  ALA      2.9    17.1    +      -       -      +
    193A  VAL*     3.5     8.7    +      -       -      +
    195A  THR*     1.3    75.1    -      -       -      +
    197A  LEU*     1.3    68.7    +      -       -      +
    199A  LEU*     4.2     8.3    -      -       -      -
    200A  LEU      3.0    19.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 197 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  LEU*     6.6     0.2    -      -       +      -
    193A  VAL*     3.0    40.2    +      -       +      +
    194A  ILE      3.8     3.4    -      -       -      +
    196A  THR*     1.3    86.9    +      -       -      +
    198A  VAL*     1.3    59.6    +      -       -      +
    200A  LEU*     3.2    15.2    -      -       +      +
    201A  GLY      3.0    19.8    +      -       -      -
    384A  CYS*     3.4    43.3    -      -       +      +
    385A  ALA*     4.8     0.7    -      -       -      +
    388A  LEU*     3.5    26.5    -      -       +      +
    721A  SER*     3.8    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 198 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  PHE*     3.1    35.4    -      -       +      -
    148A  MET*     5.1     2.0    -      -       -      -
    149A  PHE*     5.0     4.7    -      -       +      -
    152A  ILE*     3.3    34.8    -      -       +      -
    194A  ILE      2.9    21.8    +      -       -      +
    195A  THR*     3.0    20.9    -      -       -      +
    197A  LEU*     1.3    74.7    -      -       -      +
    199A  LEU*     1.3    63.5    +      -       -      +
    201A  GLY*     3.0     3.7    +      -       -      +
    202A  GLN*     3.0    27.7    +      -       -      +
    384A  CYS      4.3     6.9    +      -       -      +
    387A  GLY*     4.6    11.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 199 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  MET*     3.9    19.8    -      -       +      +
     84A  ARG*     3.9    36.8    -      -       +      -
     85A  PHE*     4.0    22.7    -      -       +      -
     88A  ALA*     4.2    16.4    -      -       +      -
    129A  GLY      4.0    11.9    -      -       -      +
    130A  GLY      4.2     6.7    -      -       -      +
    132A  PRO*     5.4     1.1    -      -       +      -
    133A  PHE*     3.5    23.1    -      -       +      -
    195A  THR*     3.0    24.8    +      -       -      +
    196A  THR*     3.6     6.5    -      -       -      +
    198A  VAL*     1.3    73.3    -      -       -      +
    200A  LEU*     1.3    65.7    +      -       -      +
    202A  GLN*     3.1     6.4    +      -       -      +
    203A  VAL*     3.0    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 200 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  PHE*     3.4    41.7    -      -       +      -
    196A  THR      3.0     9.1    +      -       -      +
    197A  LEU*     3.2    18.8    -      -       +      +
    198A  VAL      3.2     0.2    -      -       -      -
    199A  LEU*     1.3    75.8    -      -       -      +
    201A  GLY*     1.3    60.8    +      -       -      +
    203A  VAL*     3.3    10.0    +      -       +      +
    204A  LEU*     3.0    47.9    +      -       +      +
    388A  LEU*     3.8    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 201 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197A  LEU      3.0     9.3    +      -       -      -
    198A  VAL      3.0     6.8    +      -       -      -
    200A  LEU*     1.3    78.2    -      -       -      +
    202A  GLN*     1.3    59.5    +      -       -      +
    204A  LEU*     3.4     2.2    +      -       -      +
    205A  GLU*     3.0    30.4    +      -       -      +
    387A  GLY*     2.9    32.6    -      -       -      +
    388A  LEU*     3.8     5.2    -      -       -      -
    391A  PRO*     4.2     4.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 202 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  MET*     4.0    27.0    -      -       +      +
    133A  PHE*     4.0    18.5    -      -       +      -
    136A  ARG*     4.4    13.5    +      -       -      -
    148A  MET*     4.4     8.3    -      -       -      +
    149A  PHE*     3.8    34.2    -      -       -      -
    198A  VAL*     3.0    22.6    +      -       -      +
    199A  LEU*     3.1     7.6    +      -       -      +
    201A  GLY*     1.3    76.1    -      -       -      +
    203A  VAL*     1.3    65.3    +      -       -      +
    205A  GLU*     3.4    23.1    +      -       -      +
    206A  LEU*     3.0    36.3    +      -       +      +
    387A  GLY*     5.6     2.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 203 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  TYR*     3.5    26.3    -      -       +      +
     81A  MET*     4.0     8.7    -      -       +      +
     82A  ARG*     3.9    36.1    -      -       +      +
     85A  PHE*     4.3    14.4    -      -       +      -
    199A  LEU      3.0    17.1    +      -       -      +
    200A  LEU*     3.3    14.1    +      -       +      +
    202A  GLN*     1.3    77.2    -      -       -      +
    204A  LEU*     1.3    70.1    +      -       +      +
    207A  LYS*     3.0    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 204 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200A  LEU*     3.0    32.3    +      -       +      +
    201A  GLY      3.9     1.1    -      -       -      +
    202A  GLN      3.3     0.2    -      -       -      -
    203A  VAL*     1.3    85.9    -      -       +      +
    205A  GLU*     1.3    65.6    +      -       -      +
    207A  LYS*     3.4    24.8    +      -       -      +
    208A  ALA*     3.0    24.9    +      -       -      +
    388A  LEU*     4.5    13.9    -      -       +      -
    391A  PRO*     3.9    17.4    -      -       +      +
    392A  MET*     4.5    18.8    -      -       +      -
    395A  MET*     4.4    26.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 205 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  MET*     5.4     4.3    -      -       -      +
    201A  GLY      3.0    17.3    +      -       -      +
    202A  GLN*     3.8    25.3    +      -       -      +
    204A  LEU*     1.3    75.5    -      -       -      +
    206A  LEU*     1.3    76.1    +      -       +      +
    208A  ALA*     3.2     2.9    +      -       -      +
    209A  ARG*     3.0    55.6    +      -       -      +
    334A  ARG*     3.6    32.5    +      -       -      -
    391A  PRO*     4.0    12.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 206 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75A  SER*     5.2     0.7    -      -       -      +
     77A  GLU*     4.2    24.2    -      -       +      +
     78A  TYR*     3.2    52.5    -      -       +      +
     81A  MET*     4.3    14.1    -      -       +      -
    202A  GLN*     3.0    28.8    +      -       +      +
    205A  GLU*     1.3    92.1    -      -       +      +
    207A  LYS*     1.3    55.3    +      -       -      +
    209A  ARG*     3.0     4.3    +      -       +      -
    210A  GLU*     2.6    40.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 207 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  TYR*     3.8    22.1    -      -       +      +
    203A  VAL*     3.0    20.3    +      -       -      +
    204A  LEU*     3.4    25.5    +      -       -      +
    206A  LEU*     1.3    75.6    -      -       -      +
    208A  ALA*     1.3    58.9    +      -       -      +
    210A  GLU*     3.9    22.2    +      -       -      +
    211A  GLN*     4.3     6.6    +      -       -      +
    395A  MET*     6.0     6.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 208 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  LEU      3.0    16.9    +      -       -      +
    205A  GLU*     3.5     7.0    -      -       -      +
    206A  LEU      3.0     1.0    -      -       -      -
    207A  LYS*     1.3    79.8    -      -       -      +
    209A  ARG*     1.3    66.5    +      -       +      +
    210A  GLU      3.5     0.4    -      -       -      -
    211A  GLN*     5.6     0.7    -      -       -      -
    391A  PRO*     5.3     4.5    -      -       +      +
    394A  ILE*     4.5    21.8    -      -       +      +
    395A  MET*     5.3    10.5    -      -       +      -
    398A  VAL*     6.5     0.2    -      -       +      -
    409A  LYS      5.6     0.5    -      -       -      +
    410A  ASN*     4.9     5.0    -      -       -      -
    411A  ALA      4.8     6.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 209 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  GLU*     3.0    44.9    +      -       -      +
    206A  LEU*     3.0     6.0    +      -       +      +
    208A  ALA*     1.3    84.2    -      -       +      +
    210A  GLU*     1.3    65.4    +      -       -      +
    211A  GLN      3.8     4.5    -      -       -      +
    212A  THR*     5.0     4.2    -      -       -      +
    334A  ARG*     3.0    34.9    -      -       -      +
    390A  THR*     4.1    15.0    -      -       -      +
    391A  PRO*     4.9     5.5    -      -       -      +
    394A  ILE*     4.2     9.1    -      -       -      +
    410A  ASN*     5.5     5.6    -      -       +      +
    411A  ALA*     3.5    32.3    -      -       +      +
    412A  GLU*     4.1    17.9    +      -       -      +
    415A  GLU*     3.3    23.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 210 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  VAL*     4.2     8.1    -      -       -      +
     75A  SER*     3.6    38.6    +      -       -      +
     78A  TYR*     4.3    23.1    -      -       +      -
     79A  LEU*     5.3     1.0    -      -       -      +
    206A  LEU*     2.6    20.4    +      -       +      +
    207A  LYS*     3.9    19.8    -      -       -      +
    208A  ALA      3.5     2.4    -      -       -      -
    209A  ARG*     1.3    75.7    -      -       -      +
    211A  GLN*     1.3    89.7    +      -       +      +
    212A  THR*     3.1    14.9    +      -       -      +
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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