Contacts of the helix formed by residues 76 - 103 (chain A) in PDB entry 5NDD


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 VAL 76 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  LYS*     2.7    49.0    +      -       +      +
     74A  THR      3.4     0.2    -      -       -      -
     75A  THR*     1.3    82.0    -      -       -      +
     77A  PHE*     1.3    66.7    +      -       -      +
     78A  LEU      3.4     0.7    -      -       -      -
     79A  PRO*     3.4     5.2    -      -       -      +
     80A  ILE*     3.1    45.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 77 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  LYS      3.0     6.7    +      -       -      +
     73A  LEU*     3.2    33.0    -      -       +      +
     76A  VAL*     1.3    79.2    -      -       -      +
     78A  LEU*     1.3    78.9    +      -       +      +
     80A  ILE*     3.3     8.2    +      -       +      +
     81A  VAL*     3.1    47.9    +      -       +      +
    328A  VAL*     4.9    16.4    -      -       +      -
    331A  CYS*     4.2    12.8    -      -       -      -
    332A  LEU*     5.1    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73A  LEU*     3.3    17.0    +      -       +      +
     74A  THR*     3.4    12.6    -      -       +      +
     77A  PHE*     1.3    88.4    -      -       +      +
     79A  PRO*     1.4    69.5    -      -       +      +
     80A  ILE      3.1     0.5    +      -       -      -
     81A  VAL*     3.2     2.1    +      -       -      +
     82A  TYR*     2.8    37.8    +      -       +      +
    135A  HIS*     3.5    31.6    -      -       +      +
    327A  ILE*     3.7    30.3    -      -       +      -
    328A  VAL*     5.2     0.2    -      -       -      -
    331A  CYS*     3.5    36.6    -      -       +      -
   2201A  8TZ      3.8    10.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  THR      3.3    19.3    -      -       -      +
     75A  THR      3.4    17.0    -      -       -      +
     76A  VAL*     3.4    17.7    -      -       -      +
     78A  LEU*     1.4    89.1    -      -       +      +
     80A  ILE*     1.3    52.6    +      -       +      +
     82A  TYR*     4.3     7.2    -      -       +      -
     83A  THR*     2.6    38.4    +      -       -      -
    132A  ILE*     3.7    18.4    -      -       +      +
    135A  HIS*     4.0     6.5    -      -       +      -
    136A  ILE*     3.6    29.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76A  VAL*     3.1    35.6    +      -       +      +
     77A  PHE*     3.3     6.9    +      -       +      +
     78A  LEU      3.1     0.6    -      -       -      -
     79A  PRO*     1.3    76.0    -      -       +      +
     81A  VAL*     1.3    70.3    +      -       +      +
     83A  THR*     3.2     7.3    +      -       -      -
     84A  ILE*     3.0    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  PHE*     3.1    46.0    +      -       +      +
     78A  LEU      3.8     0.4    -      -       -      +
     80A  ILE*     1.3    79.4    -      -       +      +
     82A  TYR*     1.3    58.5    +      -       +      +
     84A  ILE*     3.2    14.2    +      -       +      +
     85A  VAL*     3.0    30.3    +      -       +      +
    331A  CYS*     3.6    28.0    -      -       -      +
    332A  LEU*     5.4     5.6    -      -       +      -
    335A  LEU*     4.4    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  LEU*     2.8    31.1    +      -       +      +
     79A  PRO*     4.0     2.2    -      -       +      +
     81A  VAL*     1.3    77.5    -      -       -      +
     83A  THR*     1.3    56.3    +      -       -      +
     85A  VAL*     3.3     1.8    +      -       -      -
     86A  PHE*     2.9    24.6    +      -       -      +
    128A  PHE*     3.4    27.0    -      +       +      -
    131A  LYS*     3.5    25.2    +      -       +      -
    132A  ILE*     3.9    18.4    -      -       +      -
    135A  HIS*     3.7    32.3    -      +       -      -
    330A  LEU      4.2     1.2    +      -       -      -
    331A  CYS*     3.5    24.8    +      -       +      +
    334A  THR*     3.7    34.5    -      -       +      -
   2201A  8TZ      2.5    31.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  PRO      2.6    25.7    +      -       -      -
     80A  ILE*     3.4     6.9    -      -       -      -
     82A  TYR*     1.3    72.6    -      -       -      +
     84A  ILE*     1.3    68.0    +      -       +      +
     86A  PHE*     3.1     6.4    +      -       +      +
     87A  VAL*     3.0    32.5    +      -       +      +
    132A  ILE*     3.3    28.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  ILE*     3.0    32.4    +      -       +      +
     81A  VAL*     3.4    15.5    -      -       +      +
     83A  THR*     1.3    77.7    -      -       +      +
     85A  VAL*     1.3    60.5    +      -       +      +
     87A  VAL*     3.1     6.8    +      -       -      +
     88A  VAL*     2.8    43.5    +      -       +      +
    335A  LEU*     6.0     2.9    -      -       +      -
    338A  CYS*     5.4     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  VAL*     3.0    20.9    +      -       +      +
     82A  TYR*     3.6     7.4    -      -       -      +
     84A  ILE*     1.3    75.6    -      -       +      +
     86A  PHE*     1.3    56.1    +      -       -      +
     89A  ALA*     2.7    40.9    +      -       +      +
    125A  VAL*     4.4     4.0    -      -       +      -
    128A  PHE*     3.7    21.3    -      -       +      -
    334A  THR*     3.7    20.6    -      -       -      +
    335A  LEU*     3.7    28.7    -      -       +      -
    337A  SER*     3.7    23.1    -      -       -      +
    338A  CYS*     3.7    14.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82A  TYR      2.9    14.4    +      -       -      +
     83A  THR*     3.1    12.8    +      -       +      +
     85A  VAL*     1.3    78.7    -      -       -      +
     87A  VAL*     1.3    73.5    +      -       +      +
     90A  LEU*     3.2    55.4    +      -       +      +
     91A  PRO*     3.9     0.2    -      -       -      +
    125A  VAL*     3.3    37.7    -      -       +      -
    126A  ILE*     4.7     3.6    -      -       -      -
    128A  PHE*     4.1     7.4    -      -       +      -
    129A  PRO*     3.7    30.3    -      -       +      -
    132A  ILE*     4.6     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  THR*     3.0    25.1    +      -       +      +
     84A  ILE*     3.7     7.4    -      -       -      +
     86A  PHE*     1.3    86.2    -      -       +      +
     88A  VAL*     1.3    63.2    +      -       +      +
     91A  PRO*     3.0    25.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  ILE*     2.8    32.2    +      -       +      +
     87A  VAL*     1.3    82.2    -      -       +      +
     89A  ALA*     1.3    56.3    +      -       -      +
     91A  PRO*     3.6     6.9    -      -       -      +
     92A  SER*     2.7    31.6    +      -       -      +
    338A  CYS*     3.8    29.2    -      -       +      +
    341A  PRO*     5.8     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  VAL*     2.7    27.4    +      -       +      +
     88A  VAL*     1.3    75.7    -      -       -      +
     90A  LEU*     1.3    63.7    +      -       -      +
     92A  SER*     3.0    11.2    +      -       -      -
     93A  ASN*     2.9    24.7    +      -       -      +
    122A  LEU*     4.7     0.3    -      -       -      +
    125A  VAL*     4.1     7.9    -      -       +      -
    337A  SER*     3.4    44.6    -      -       -      +
    338A  CYS*     4.1     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  VAL      4.0     0.2    +      -       -      -
     86A  PHE*     3.2    47.8    +      -       +      +
     89A  ALA*     1.3    78.5    -      -       -      +
     91A  PRO*     1.3    63.7    -      -       +      +
     94A  GLY*     2.9    26.2    +      -       -      -
    122A  LEU*     3.5    22.0    -      -       +      +
    125A  VAL*     3.9    19.8    -      -       +      +
    126A  ILE*     3.7    31.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  PHE      3.9     0.4    -      -       -      +
     87A  VAL*     3.0    29.4    -      -       -      +
     88A  VAL      3.6     3.6    -      -       -      +
     90A  LEU*     1.3    95.0    -      -       +      +
     92A  SER*     1.3    58.9    +      -       -      +
     94A  GLY*     3.6     2.4    -      -       -      +
     95A  MET*     2.8    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  VAL*     2.7    26.1    +      -       -      +
     89A  ALA*     3.0    10.7    +      -       -      -
     91A  PRO*     1.3    82.6    -      -       -      +
     93A  ASN*     1.3    62.8    +      -       -      +
     95A  MET*     3.4     6.8    +      -       -      +
     96A  ALA*     3.0    26.4    +      -       -      +
    341A  PRO*     3.5    30.6    -      -       -      +
    351A  PHE*     4.3     8.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  ALA*     2.9    24.5    +      -       -      +
     92A  SER*     1.3    81.7    +      -       -      +
     94A  GLY*     1.3    61.0    +      -       -      +
     95A  MET      3.3     0.2    -      -       -      -
     96A  ALA*     3.7     6.0    -      -       -      +
     97A  LEU*     2.9    32.2    +      -       -      +
    118A  ALA*     3.6    11.9    -      -       +      +
    121A  ASP*     2.7    34.2    +      -       +      +
    122A  LEU*     4.0    15.0    -      -       +      +
    337A  SER      3.0    25.7    +      -       -      -
    340A  ASP*     4.1     1.0    -      -       -      +
    341A  PRO*     4.5     2.1    -      -       -      +
    344A  TYR*     3.0    25.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  LEU      2.9    20.2    +      -       -      -
     91A  PRO*     3.6     2.9    -      -       -      -
     92A  SER      3.2     0.2    -      -       -      -
     93A  ASN*     1.3    79.3    -      -       -      +
     95A  MET*     1.3    60.3    +      -       -      +
     97A  LEU*     3.7     3.3    +      -       -      +
     98A  TRP*     3.3    20.1    +      -       -      +
    122A  LEU*     3.8    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  PRO      2.8    16.4    +      -       -      +
     92A  SER*     3.9     5.4    -      -       -      +
     94A  GLY*     1.3    74.8    -      -       -      +
     96A  ALA*     1.3    60.8    +      -       -      +
     98A  TRP*     3.1    22.3    +      -       +      +
     99A  VAL*     2.9    35.8    +      -       +      +
    351A  PHE*     3.7    29.6    -      -       +      -
    354A  HIS*     3.8    37.9    -      -       +      +
    355A  ALA*     4.2     5.4    -      -       +      +
    358A  ALA*     4.8    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  SER      3.0    18.4    +      -       -      +
     93A  ASN*     3.7     4.5    -      -       -      +
     94A  GLY      3.4     0.2    -      -       -      -
     95A  MET*     1.3    77.4    -      -       -      +
     97A  LEU*     1.3    57.0    +      -       -      +
     99A  VAL*     3.2     2.4    +      -       -      +
    100A  PHE*     3.0    42.9    +      -       +      -
    118A  ALA*     4.6     0.7    -      -       +      -
    344A  TYR*     3.6    36.3    -      -       +      -
    351A  PHE*     3.6    19.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  ASN      2.9    17.9    +      -       -      +
     94A  GLY      3.9     4.7    -      -       -      +
     96A  ALA*     1.3    77.4    -      -       -      +
     98A  TRP*     1.3    64.1    +      -       -      +
    100A  PHE*     3.6     3.9    +      -       -      +
    101A  LEU*     3.2    57.0    +      -       +      +
    115A  ALA*     3.3    31.9    -      -       +      +
    118A  ALA*     4.2     5.7    -      -       +      +
    119A  LEU*     4.7    12.1    -      -       +      +
    122A  LEU*     4.1    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  GLY      3.3    12.4    +      -       -      +
     95A  MET*     3.1    20.5    +      -       +      +
     97A  LEU*     1.3    80.4    -      -       -      +
     99A  VAL*     1.3    73.2    +      -       +      +
    101A  LEU*     4.8     2.0    -      -       -      -
    102A  PHE*     2.8    68.0    +      +       +      +
    103A  ARG*     3.3    47.6    -      -       +      -
    354A  HIS*     3.4    26.9    -      +       -      -
----------------------------------------------------------
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Residues in contact with VAL 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  MET*     2.9    22.6    +      -       +      +
     96A  ALA*     3.2     8.5    +      -       -      +
     98A  TRP*     1.3    86.0    -      -       +      +
    100A  PHE*     1.3    61.2    +      -       +      +
    103A  ARG*     2.9    19.5    +      -       +      -
    104A  THR*     2.6    44.8    +      -       -      +
    350A  ASP*     4.1    26.5    -      -       +      +
    351A  PHE*     4.1    13.2    -      -       +      +
    354A  HIS*     3.7    31.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  ALA*     3.0    37.7    +      -       +      +
     97A  LEU*     4.0     5.2    -      -       -      +
     99A  VAL*     1.3    78.1    -      -       +      +
    101A  LEU*     1.3    62.1    +      -       +      +
    104A  THR*     3.7    12.1    -      -       -      -
    107A  LYS*     3.7    18.4    -      -       -      +
    111A  VAL*     3.7    30.1    -      -       +      +
    114A  MET*     3.6    35.4    -      -       +      -
    115A  ALA*     3.7    31.6    -      -       +      -
    118A  ALA*     4.8     0.7    -      -       +      -
    344A  TYR*     3.9    26.5    -      +       +      -
    348A  SER*     3.6    26.5    -      -       -      -
    351A  PHE*     4.4     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LEU*     3.2    53.4    +      -       +      +
     98A  TRP      4.0     1.3    -      -       -      +
     99A  VAL      3.2     0.2    -      -       -      -
    100A  PHE*     1.3    85.7    -      -       -      +
    102A  PHE*     1.3    95.0    +      -       +      +
    103A  ARG      3.7     0.4    -      -       -      -
    104A  THR      4.8     1.3    -      -       -      +
    107A  LYS*     4.1    18.2    +      -       -      +
    115A  ALA*     4.3    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  TRP*     2.8    49.3    +      +       +      +
    101A  LEU*     1.3   104.1    -      -       +      +
    103A  ARG*     1.3    88.6    +      -       -      +
    104A  THR      5.4     0.4    -      -       -      -
    105A  LYS*     5.5     6.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  TRP*     3.3    44.1    +      -       +      -
     99A  VAL*     2.9    18.2    +      -       +      +
    102A  PHE*     1.3   106.2    +      -       -      +
    104A  THR*     1.3    65.9    +      -       -      +
    105A  LYS*     3.5    13.5    +      -       -      +
    350A  ASP*     4.3     8.7    -      -       -      +
    354A  HIS*     3.3    34.3    +      -       +      +
----------------------------------------------------------
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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