Contacts of the helix formed by residues 198 - 221 (chain C) in PDB entry 5L26


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 PRO 198 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196C  GLY      3.2     7.8    -      -       -      +
    197C  VAL*     1.3    90.5    -      -       +      +
    199C  LEU*     1.3    65.7    -      -       -      +
    200C  PRO*     3.4     6.7    -      -       +      -
    201C  TYR*     3.4    37.8    +      -       +      +
    202C  LEU*     3.3    19.1    +      -       -      +
    343C  LEU*     4.0    20.4    -      -       +      -
    356C  LYS*     5.5     2.0    -      -       +      +
    360C  SER*     4.1     7.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 199 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60C  SER*     3.2    35.7    -      -       -      +
     63C  ILE*     4.4    11.0    -      -       +      -
     64C  SER*     4.1    18.4    -      -       -      +
     67C  ILE*     4.8     5.2    -      -       +      -
    189C  LEU*     3.9    11.4    -      -       +      -
    193C  VAL*     3.6    31.6    -      -       +      +
    197C  VAL      3.2     6.0    +      -       -      -
    198C  PRO*     1.3    69.1    -      -       -      +
    200C  PRO*     1.4    75.1    -      -       +      +
    202C  LEU*     2.9     6.0    +      -       +      +
    203C  ILE*     2.9    47.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 200 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56C  LEU*     3.7    22.2    -      -       +      +
     57C  GLY*     5.8     2.2    -      -       -      -
     60C  SER*     3.3    27.8    -      -       -      +
    198C  PRO*     3.6     8.5    -      -       +      -
    199C  LEU*     1.4    93.9    -      -       +      +
    201C  TYR*     1.3    68.5    +      -       +      +
    203C  ILE*     3.3     5.6    +      -       +      +
    204C  ALA*     3.0    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 201 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47C  LEU*     4.4    15.7    -      -       +      -
    198C  PRO*     3.4    34.0    +      -       +      +
    199C  LEU      3.2     0.6    -      -       -      -
    200C  PRO*     1.3    83.8    -      -       +      +
    202C  LEU*     1.3    59.0    +      -       +      +
    204C  ALA      3.5     0.2    +      -       -      -
    205C  ALA*     2.9    32.5    +      -       -      +
    353C  ASP*     4.5     5.2    +      -       -      +
    356C  LYS*     4.2     4.5    -      -       +      -
    357C  ALA*     3.5    34.0    -      -       +      +
    360C  SER*     3.6    29.2    -      -       -      +
    361C  PHE*     3.4    33.8    -      +       +      -
    416C  THR*     4.6     5.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 202 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189C  LEU*     3.6    39.4    -      -       +      +
    192C  TYR*     3.7    24.5    -      -       +      -
    193C  VAL*     3.7    17.5    -      -       +      -
    197C  VAL*     3.9    22.7    -      -       +      +
    198C  PRO      3.3     9.6    +      -       -      +
    199C  LEU*     2.9     7.7    +      -       -      +
    201C  TYR*     1.3    74.2    -      -       +      +
    203C  ILE*     1.3    64.6    +      -       -      +
    205C  ALA*     4.0     0.9    -      -       -      +
    206C  SER*     2.9    30.7    +      -       -      -
    336C  TYR*     3.9    15.7    -      -       -      +
    360C  SER      4.6     2.7    -      -       -      +
    364C  CYS*     3.7    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 203 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56C  LEU*     3.7    17.9    -      -       +      -
     59C  ALA*     4.7    12.8    -      -       +      +
     60C  SER*     4.2    10.3    -      -       -      +
     63C  ILE*     3.6    30.5    -      -       +      -
    189C  LEU*     4.4    11.2    -      -       +      -
    199C  LEU*     2.9    42.3    +      -       +      +
    200C  PRO*     3.5     8.7    -      -       +      +
    202C  LEU*     1.3    77.4    -      -       -      +
    204C  ALA*     1.3    64.0    +      -       -      +
    206C  SER*     3.3    11.4    +      -       -      -
    207C  PHE*     3.0    42.7    +      -       +      -
    501C  6ZL      6.1     0.7    -      -       +      -
    502C  6ZL      4.8     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 204 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  VAL*     3.8    20.2    -      -       +      -
     47C  LEU*     4.8     0.9    -      -       +      -
     56C  LEU*     4.3     6.9    -      -       +      +
    200C  PRO      3.0    13.6    +      -       -      +
    203C  ILE*     1.3    80.7    -      -       -      +
    205C  ALA*     1.3    58.8    +      -       -      +
    207C  PHE*     3.2     8.6    +      -       -      +
    208C  MET*     3.0    45.5    +      -       +      +
    361C  PHE*     3.6    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 205 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201C  TYR      2.9    19.1    +      -       -      +
    202C  LEU      4.0     0.2    -      -       -      +
    204C  ALA*     1.3    76.4    -      -       -      +
    206C  SER*     1.3    57.0    +      -       -      +
    208C  MET*     3.4     5.3    +      -       -      +
    209C  ALA*     3.0    28.4    +      -       -      +
    361C  PHE*     3.5    26.0    -      -       +      +
    364C  CYS*     3.6    37.0    -      -       +      +
    408C  SER*     5.1     3.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 206 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150C  ILE*     3.4    43.1    +      -       -      +
    183C  SER*     5.9     0.2    -      -       -      -
    184C  VAL*     4.3    13.5    -      -       -      +
    189C  LEU*     3.2    20.8    -      -       -      +
    202C  LEU      2.9    21.8    +      -       -      -
    203C  ILE*     3.7     4.9    -      -       -      -
    204C  ALA      3.3     0.4    -      -       -      -
    205C  ALA*     1.3    76.7    -      -       -      +
    207C  PHE*     1.3    62.4    +      -       -      +
    209C  ALA*     3.5    16.4    -      -       -      +
    364C  CYS*     4.3     8.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 207 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42C  LEU*     4.0    18.1    -      -       +      +
    128C  ILE*     4.7    14.6    -      -       +      -
    150C  ILE*     4.0    34.6    -      -       +      +
    203C  ILE*     3.0    43.2    +      -       +      -
    204C  ALA*     3.2     9.3    +      -       -      +
    206C  SER*     1.3    76.4    -      -       -      +
    208C  MET*     1.3    60.8    +      -       +      +
    209C  ALA      3.1     4.9    +      -       -      -
    210C  ALA*     3.7     6.1    +      -       -      +
    211C  PRO*     3.3    15.4    -      -       -      +
    502C  6ZL      4.0    49.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 208 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39C  GLN*     4.0    22.4    -      -       +      +
     42C  LEU*     4.2    17.5    -      -       +      -
     43C  GLY*     3.6    28.3    -      -       -      +
     46C  VAL*     3.9     9.0    -      -       +      -
     47C  LEU*     4.1     7.2    -      -       +      -
    204C  ALA*     3.0    40.1    +      -       +      +
    205C  ALA      3.4     3.3    +      -       -      +
    207C  PHE*     1.3    74.6    -      -       +      +
    209C  ALA*     1.3    63.4    +      -       -      +
    210C  ALA      3.3     0.2    -      -       -      -
    211C  PRO*     3.2    11.0    -      -       -      +
    212C  GLY*     3.2    21.5    +      -       -      -
    361C  PHE*     3.9    12.8    -      -       +      -
    404C  SER*     4.5     0.3    +      -       -      -
    408C  SER*     3.4    36.2    +      -       -      +
    411C  ILE*     4.8     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 209 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179C  GLY*     5.1     2.5    -      -       -      +
    182C  ALA*     3.3    29.0    -      -       -      +
    183C  SER*     3.8    20.4    -      -       -      -
    205C  ALA      3.0    17.3    +      -       -      +
    206C  SER*     3.5    12.8    -      -       -      +
    207C  PHE      3.1     0.6    -      -       -      -
    208C  MET*     1.3    79.5    -      -       -      +
    210C  ALA*     1.3    56.6    +      -       -      +
    213C  GLY*     2.8    27.9    +      -       -      -
    364C  CYS      5.7     0.4    -      -       -      +
    404C  SER*     3.9     7.0    +      -       -      -
    405C  ASN*     5.7     0.4    -      -       -      -
    408C  SER*     5.4     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 210 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128C  ILE*     5.9     0.9    -      -       +      -
    132C  LEU*     4.4    10.8    -      -       +      -
    146C  ALA*     3.3    39.9    -      -       +      +
    149C  ASN*     6.2     0.7    -      -       -      -
    150C  ILE*     4.2    13.4    -      -       +      +
    179C  GLY*     5.8     3.1    -      -       -      -
    183C  SER*     6.2     0.2    -      -       -      -
    206C  SER      4.3     1.0    +      -       -      -
    207C  PHE      3.7     6.5    +      -       -      +
    209C  ALA*     1.3    77.4    -      -       -      +
    211C  PRO*     1.4    73.0    -      -       +      +
    213C  GLY*     3.8     0.9    -      -       -      -
    214C  LEU*     3.1    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 211 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  ALA*     3.6    25.6    -      -       +      +
     38C  ILE*     4.2    20.2    -      -       +      -
     39C  GLN*     4.2    16.6    -      -       +      -
     42C  LEU*     4.4     4.5    -      -       +      -
    132C  LEU*     4.8    11.6    -      -       +      -
    136C  LEU*     5.2     0.9    -      -       +      -
    207C  PHE      3.3    15.0    -      -       -      +
    208C  MET*     3.2    16.8    -      -       -      +
    210C  ALA*     1.4    93.2    -      -       +      +
    212C  GLY*     1.3    57.1    +      -       -      +
    214C  LEU*     3.4    10.3    +      -       +      +
    215C  LEU*     2.9    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 212 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39C  GLN*     3.4    24.2    -      -       -      +
    208C  MET      3.2    13.2    +      -       -      -
    211C  PRO*     1.3    74.5    -      -       -      +
    213C  GLY*     1.3    63.6    +      -       -      +
    215C  LEU*     3.4     1.9    +      -       -      +
    216C  PHE*     3.2    31.4    +      -       -      -
    404C  SER*     3.1    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 213 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175C  ALA      5.4     0.4    -      -       -      -
    178C  SER*     4.0    17.0    -      -       -      -
    179C  GLY*     4.7     5.4    -      -       -      -
    182C  ALA*     4.2    12.1    -      -       -      -
    209C  ALA      2.8    18.5    +      -       -      -
    210C  ALA      3.8     1.1    -      -       -      -
    212C  GLY*     1.3    77.9    -      -       -      +
    214C  LEU*     1.3    62.7    +      -       -      +
    216C  PHE*     3.6     1.4    +      -       -      +
    217C  ALA*     3.1    26.6    +      -       -      +
    400C  ALA*     5.4     1.7    -      -       -      +
    404C  SER*     3.3     6.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 214 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31C  THR*     5.4     1.1    -      -       +      +
     35C  ALA*     4.8     1.6    -      -       +      -
    132C  LEU*     3.9    26.7    -      -       +      -
    136C  LEU*     3.7    29.4    -      -       +      -
    138C  THR*     4.7    16.8    -      -       +      +
    142C  GLU*     4.1    25.6    -      -       +      +
    143C  SER*     5.0     1.8    -      -       -      +
    146C  ALA*     4.1    10.1    -      -       +      -
    175C  ALA*     4.3    24.5    -      -       +      +
    179C  GLY*     5.7     0.6    -      -       -      -
    210C  ALA      3.1    17.9    +      -       -      +
    211C  PRO*     3.7     4.3    -      -       +      +
    213C  GLY*     1.3    72.5    -      -       -      +
    215C  LEU*     1.3    65.6    +      -       -      +
    217C  ALA*     4.2     3.1    -      -       -      -
    218C  LYS*     3.0    32.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 215 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  ILE*     5.3     5.2    -      -       +      -
     31C  THR*     6.4     0.4    -      -       -      -
     32C  VAL*     3.2    42.7    -      -       +      +
     35C  ALA*     3.8     9.6    -      -       +      +
     36C  PHE*     4.2    24.9    -      -       +      +
     39C  GLN*     4.0    16.4    -      -       -      +
    211C  PRO      2.9    18.3    +      -       -      +
    212C  GLY*     3.4     5.4    -      -       -      +
    213C  GLY      3.2     0.4    -      -       -      -
    214C  LEU*     1.3    78.6    -      -       -      +
    216C  PHE*     1.3    86.5    +      -       +      +
    218C  LYS      3.4     1.2    +      -       -      -
    219C  LEU*     3.2    42.5    +      -       +      +
    407C  MET*     4.8     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 216 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13C  LEU*     4.0    19.3    -      -       +      -
     14C  ILE*     4.5     3.8    -      -       +      -
     17C  ALA*     3.7    19.7    -      -       +      -
    212C  GLY      3.2    23.1    +      -       -      +
    213C  GLY      4.6     0.7    -      -       -      +
    215C  LEU*     1.3    95.5    -      -       +      +
    217C  ALA*     1.3    60.1    +      -       -      +
    219C  LEU*     3.7    11.4    -      -       +      -
    220C  LEU*     3.2    33.8    +      -       +      +
    400C  ALA*     3.8    22.7    -      -       +      +
    403C  LEU*     3.4    49.1    -      -       +      -
    404C  SER*     3.6    14.8    -      -       -      -
    407C  MET*     3.9    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 217 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171C  SER*     4.4     1.1    +      -       -      +
    174C  PHE*     3.9    10.8    -      -       +      -
    175C  ALA*     3.6    36.3    -      -       +      -
    178C  SER*     3.9    10.1    -      -       -      +
    213C  GLY      3.1    20.1    +      -       -      +
    214C  LEU      3.8     4.0    -      -       -      +
    215C  LEU      3.2     0.2    -      -       -      -
    216C  PHE*     1.3    79.7    -      -       -      +
    218C  LYS*     1.3    58.4    +      -       +      +
    219C  LEU      3.2     1.8    -      -       -      -
    221C  VAL*     3.2    34.3    +      -       -      +
    400C  ALA*     4.7     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 218 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27C  ILE*     4.3     4.2    -      -       -      +
     28C  ASN*     5.1     2.1    +      -       +      +
     31C  THR*     3.8    26.9    -      -       +      -
     32C  VAL*     4.1    11.9    -      -       +      +
    138C  THR*     4.0    13.7    -      -       +      +
    142C  GLU*     2.7    43.5    +      -       -      -
    171C  SER*     3.4    26.8    +      -       -      +
    175C  ALA*     4.4     8.5    -      -       -      -
    214C  LEU*     3.0    21.4    +      -       -      +
    215C  LEU      3.8     2.7    -      -       -      +
    217C  ALA*     1.3    76.5    -      -       -      +
    219C  LEU*     1.3    59.6    +      -       -      +
    221C  VAL      4.2     2.5    -      -       -      -
    222C  PRO*     3.3    27.2    -      -       +      +
    223C  GLU*     3.9    22.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 219 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  ILE*     4.4    17.9    -      -       +      +
     17C  ALA*     4.0    27.4    -      -       +      +
     18C  VAL*     4.3    12.6    -      -       +      -
     21C  SER*     2.7    32.3    +      -       -      -
     27C  ILE*     3.9    29.0    -      -       +      +
     32C  VAL*     3.7    23.8    -      -       +      -
    215C  LEU*     3.2    41.9    +      -       +      +
    216C  PHE*     3.9    13.7    -      -       +      +
    217C  ALA      3.2     0.4    -      -       -      -
    218C  LYS*     1.3    80.2    -      -       -      +
    220C  LEU*     1.3    55.6    +      -       -      +
    222C  PRO*     4.0     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 220 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17C  ALA*     3.2    33.9    -      -       +      +
     20C  LEU*     3.7    29.9    -      -       +      +
     21C  SER*     3.4     2.6    -      -       -      +
     22C  THR*     3.0    29.6    +      -       -      +
    174C  PHE*     3.9    13.9    -      -       +      -
    216C  PHE*     3.2    19.5    +      -       +      +
    219C  LEU*     1.3    77.7    -      -       -      +
    221C  VAL*     1.3    64.3    +      -       +      +
    222C  PRO*     3.8     0.7    -      -       -      -
    396C  LYS*     3.5    28.7    -      -       +      +
    399C  VAL*     4.7     7.9    -      -       +      -
    400C  ALA*     3.7    19.7    -      -       +      +
    403C  LEU*     5.3     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 221 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22C  THR*     3.6    25.1    -      -       +      +
    170C  GLU*     4.9    12.6    -      -       +      +
    171C  SER*     2.4    37.0    +      -       -      +
    174C  PHE*     3.4    52.3    -      -       +      -
    217C  ALA      3.2    11.0    +      -       -      +
    218C  LYS*     4.2     0.6    -      -       -      -
    220C  LEU*     1.3    84.5    -      -       +      +
    222C  PRO*     1.3    58.7    -      -       -      +
    393C  LEU*     5.3     8.3    -      -       +      -
----------------------------------------------------------
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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