Contacts of the helix formed by residues 15 - 38 (chain P) in PDB entry 2DYS


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 15 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8N  PHE*     3.6    35.9    -      -       +      -
     14P  SER*     1.3    91.8    -      -       -      +
     16P  TRP*     1.3    76.4    +      -       +      +
     17P  PRO      3.3     1.6    -      -       -      -
     18P  LEU*     3.1     7.6    +      -       -      +
     19P  THR*     3.0    22.7    +      -       -      +
     21W  HIS*     3.4    41.7    -      -       +      +
     32W  TYR*     3.7    19.1    -      -       +      -
     36W  MET*     3.8     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 16 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96N  ARG*     5.0     2.5    -      -       -      -
     14P  SER*     3.2    13.9    +      -       -      -
     15P  PRO*     1.3    85.6    -      -       +      +
     17P  PRO*     1.3    67.3    -      -       +      +
     19P  THR*     3.1    16.7    +      -       +      -
     20P  GLY*     2.8    26.7    +      -       -      -
     53P  THR*     3.3    12.3    -      -       +      +
     56P  GLN*     3.1    52.9    -      -       +      +
     57P  TRP*     3.6    42.9    -      +       +      -
     59P  ARG*     4.0     3.6    -      -       -      -
     60P  ASP*     2.7    29.7    +      -       +      -
     21W  HIS*     3.6    23.5    -      +       +      +
     32W  TYR*     3.7    28.5    -      +       +      -
     35W  THR*     4.1    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 17 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96N  ARG*     3.2    37.9    -      -       +      +
     99N  ASN*     3.6    24.7    -      -       +      +
    100N  MET*     3.6    29.3    -      -       +      +
    103N  TRP*     4.9     1.3    -      -       -      -
     14P  SER*     3.5    18.4    -      -       -      +
     15P  PRO      3.6     0.2    -      -       -      -
     16P  TRP*     1.3    93.1    -      -       +      +
     18P  LEU*     1.3    56.1    +      -       -      +
     21P  ALA*     2.9    29.3    +      -       -      +
     57P  TRP*     3.9    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 18 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7N  LEU*     3.8    50.9    -      -       +      +
      8N  PHE*     4.2    10.5    -      -       +      -
     99N  ASN*     5.0     0.6    -      -       -      +
    103N  TRP*     4.0    35.4    -      -       +      -
     15P  PRO      3.1     9.6    +      -       -      +
     17P  PRO*     1.3    77.7    -      -       -      +
     19P  THR*     1.3    67.0    +      -       +      +
     21P  ALA*     3.1     6.9    +      -       +      +
     22P  LEU*     2.9    50.1    +      -       +      +
     36W  MET*     5.0     8.1    -      -       +      -
     40W  LEU*     5.9     2.2    -      -       +      -
    101W  CHD      4.3     7.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 19 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15P  PRO      3.0    11.8    +      -       -      +
     16P  TRP*     3.1    24.9    +      -       +      -
     18P  LEU*     1.3    75.1    -      -       -      +
     20P  GLY*     1.3    59.4    +      -       -      +
     22P  LEU*     3.3     2.7    +      -       -      -
     23P  SER*     2.8    29.8    +      -       -      -
     53P  THR*     3.0    21.3    +      -       -      +
     35W  THR*     3.9    17.3    -      -       +      -
     36W  MET*     3.6    31.4    -      -       +      -
     39W  CYS*     3.7    21.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 20 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100N  MET*     4.5     9.9    -      -       -      -
    609N  PGV      4.1    13.1    -      -       -      +
     16P  TRP      2.8    13.6    +      -       -      -
     17P  PRO      3.8     0.9    -      -       -      -
     19P  THR*     1.3    79.0    +      -       -      +
     21P  ALA*     1.3    60.5    +      -       -      +
     23P  SER*     2.6    24.3    +      -       -      -
     24P  ALA*     3.0     9.9    +      -       -      +
     53P  THR*     3.5    19.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 21 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100N  MET*     4.4     3.0    -      -       +      -
    103N  TRP*     3.4    41.1    -      -       +      +
    104N  LEU*     3.9    18.5    -      -       +      +
    107N  PRO*     4.2     5.8    -      -       +      +
     17P  PRO      2.9    18.1    +      -       -      +
     18P  LEU*     3.4     7.2    -      -       +      +
     20P  GLY*     1.3    75.3    -      -       -      +
     22P  LEU*     1.3    62.7    +      -       +      +
     24P  ALA*     3.1    18.4    -      -       -      +
     25P  LEU*     3.2     8.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 22 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107N  PRO*     4.9     9.9    -      -       +      -
     18P  LEU*     2.9    42.2    +      -       +      +
     19P  THR*     3.7     3.8    -      -       -      +
     21P  ALA*     1.3    75.4    -      -       +      +
     23P  SER*     1.3    59.2    +      -       -      +
     25P  LEU*     3.0    15.2    +      -       +      +
     26P  LEU*     2.9    34.1    +      -       -      +
     36W  MET*     5.6     1.1    -      -       -      -
     39W  CYS*     4.0    27.8    -      -       +      +
     40W  LEU*     4.1    20.9    -      -       +      -
     43W  THR*     3.5    31.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 23 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    609N  PGV      4.3     0.2    -      -       -      +
     19P  THR      2.8    18.3    +      -       -      -
     20P  GLY*     2.6    21.6    +      -       -      -
     22P  LEU*     1.3    71.6    -      -       -      +
     24P  ALA*     1.3    55.4    +      -       -      +
     26P  LEU*     3.2     4.8    +      -       -      +
     27P  MET*     2.9    36.2    +      -       -      +
     46P  GLY      3.7     1.3    -      -       -      -
     49P  THR*     3.1    29.6    -      -       -      -
     50P  ASN*     3.3    35.3    +      -       -      -
     39W  CYS*     4.8     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 24 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104N  LEU*     3.7    21.3    -      -       +      -
    152N  LEU*     3.9    14.8    -      -       +      -
    609N  PGV      4.1    13.9    -      -       +      -
     20P  GLY      3.0     7.5    +      -       -      +
     21P  ALA      3.1    12.1    -      -       -      +
     23P  SER*     1.3    82.8    +      -       -      +
     25P  LEU*     1.3    59.1    +      -       -      +
     27P  MET*     3.5    13.1    +      -       -      +
     28P  THR*     3.0    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 25 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107N  PRO*     3.9    39.3    -      -       +      +
    110N  LEU*     4.0    25.6    -      -       +      -
    111N  LEU*     4.3    17.9    -      -       +      -
    152N  LEU*     4.4     4.2    -      -       -      +
     21P  ALA      3.2     3.8    +      -       -      +
     22P  LEU*     3.0    17.3    +      -       +      +
     24P  ALA*     1.3    77.1    -      -       -      +
     26P  LEU*     1.3    60.4    +      -       +      +
     28P  THR*     3.1     4.2    +      -       -      -
     29P  SER*     2.8    38.6    +      -       -      +
     43W  THR*     4.2    23.3    -      -       +      +
     46W  SER*     4.1    20.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 26 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22P  LEU      2.9    19.2    +      -       -      +
     23P  SER*     3.2     2.7    +      -       -      +
     25P  LEU*     1.3    80.4    -      -       +      +
     27P  MET*     1.3    51.4    +      -       -      +
     29P  SER*     3.8     3.0    -      -       -      -
     30P  GLY*     2.7    31.4    +      -       -      -
     42P  LEU*     3.6    20.3    -      -       +      +
     45P  ILE*     3.9    27.4    -      -       +      -
     46P  GLY*     3.4    17.7    -      -       -      +
     49P  THR*     4.0    15.7    -      -       -      +
     38W  LEU      4.1     6.5    -      -       -      +
     39W  CYS*     4.2     9.6    -      -       -      +
     42W  GLY*     3.2    37.5    -      -       -      +
     43W  THR*     3.6    10.3    -      -       -      +
     46W  SER*     4.0     5.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 27 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    609N  PGV      4.4    13.7    -      -       +      -
     23P  SER      2.9    22.3    +      -       -      +
     24P  ALA*     3.8    15.3    -      -       -      +
     25P  LEU      3.3     0.2    -      -       -      -
     26P  LEU*     1.3    74.8    -      -       -      +
     28P  THR*     1.3    61.2    +      -       +      +
     30P  GLY*     3.5     0.3    -      -       -      -
     31P  LEU*     2.8    35.6    +      -       +      +
     43P  LEU*     3.6    11.1    -      -       +      +
     46P  GLY*     3.5    22.9    -      -       -      +
     47P  LEU*     3.7    29.2    -      -       +      +
     50P  ASN*     3.5    27.4    -      -       -      +
    302P  DMU      5.4     5.2    -      -       +      -
    307P  PGV      3.6    27.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 28 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111N  LEU*     3.7    13.6    -      -       -      +
    148N  PHE*     3.4    37.7    -      -       +      +
    151N  HIS*     5.6     0.2    -      -       +      -
    152N  LEU*     4.1    18.4    -      -       +      -
    609N  PGV      3.9    28.7    -      -       +      -
     24P  ALA      3.0    19.0    +      -       -      +
     25P  LEU*     3.1    10.2    +      -       -      -
     27P  MET*     1.3    71.6    -      -       -      +
     29P  SER*     1.3    64.8    +      -       -      +
     31P  LEU*     3.3     1.8    +      -       -      +
     32P  THR*     2.7    34.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 29 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111N  LEU*     4.8     9.2    -      -       -      +
    145N  LEU*     5.3     2.7    -      -       -      +
     25P  LEU*     2.8    24.5    +      -       -      +
     26P  LEU*     3.8     4.5    -      -       -      -
     28P  THR*     1.3    80.7    +      -       -      +
     30P  GLY*     1.3    57.4    +      -       -      +
     32P  THR*     3.1     9.8    +      -       -      -
     33P  MET*     2.9    30.5    +      -       -      +
     42P  LEU*     3.9    16.3    -      -       -      +
     46W  SER*     3.8    20.2    +      -       -      -
     49W  CYS*     6.0     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 30 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26P  LEU      2.7    21.3    +      -       -      -
     27P  MET      3.5     2.0    -      -       -      -
     28P  THR      3.2     0.2    -      -       -      -
     29P  SER*     1.3    76.9    -      -       -      +
     31P  LEU*     1.3    55.7    +      -       -      +
     33P  MET*     3.2     3.8    +      -       -      +
     34P  TRP*     2.9    28.4    +      -       -      +
     39P  SER      4.0     1.2    -      -       -      +
     42P  LEU*     3.5     8.5    -      -       -      +
     43P  LEU*     3.4    29.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 31 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148N  PHE*     3.6    32.5    -      -       +      -
    609N  PGV      4.2    12.6    -      -       +      -
     27P  MET*     2.8    23.7    +      -       +      +
     29P  SER      3.3     0.2    -      -       -      -
     30P  GLY*     1.3    68.7    -      -       -      +
     32P  THR*     1.3    57.4    +      -       -      +
     34P  TRP*     3.2    29.3    +      -       +      +
     35P  PHE*     2.7    47.8    +      -       +      +
     43P  LEU*     4.1    16.6    -      -       +      -
    302P  DMU      3.9    23.6    -      -       +      -
    305P  PEK      4.2    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 32 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141N  ALA*     3.8    23.3    -      -       +      +
    144N  ASP*     4.8     4.3    -      -       +      -
    145N  LEU*     3.8    33.2    -      -       +      +
    148N  PHE*     3.1    18.8    -      -       -      -
     28P  THR      2.7    22.2    +      -       -      -
     29P  SER*     3.3     7.6    -      -       -      -
     31P  LEU*     1.3    77.4    -      -       -      +
     33P  MET*     1.3    58.6    +      -       -      +
     35P  PHE*     4.5     4.7    -      -       -      +
     36P  HIS*     2.9    39.0    +      -       +      +
     37P  PHE*     4.3     5.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 33 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29P  SER      2.9    14.5    +      -       -      +
     30P  GLY*     3.4    12.1    -      -       -      +
     32P  THR*     1.3    77.5    -      -       -      +
     34P  TRP*     1.3    57.6    +      -       -      +
     37P  PHE*     2.8    64.5    +      -       +      -
     38P  ASN      3.1     7.4    +      -       -      -
     39P  SER*     3.4    23.3    +      -       -      +
     42P  LEU*     4.5    16.8    -      -       +      +
     45W  TYR*     5.7     2.2    -      -       +      +
     49W  CYS*     3.7    44.9    -      -       +      +
     52W  TRP*     4.8    10.5    -      -       +      -
     53W  ALA*     5.9     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 34 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30P  GLY      2.9    16.4    +      -       -      +
     31P  LEU*     3.5    21.8    -      -       +      +
     33P  MET*     1.3    80.2    -      -       -      +
     35P  PHE*     1.3    88.7    +      +       -      +
     36P  HIS      3.4     0.3    +      -       -      -
     38P  ASN*     3.6    16.6    +      -       -      +
     39P  SER      3.2    15.2    +      -       -      +
     40P  MET*     3.5    17.0    -      -       +      -
     43P  LEU*     4.5    11.0    -      -       +      -
    302P  DMU      2.6    61.2    +      +       -      -
    305P  PEK      3.8    30.1    -      -       +      -
     61T  SER*     3.0    35.2    +      -       -      -
     62T  TRP*     3.8    19.5    -      +       -      -
     69T  PHE*     5.3     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with PHE 35 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144N  ASP*     5.2     1.3    -      -       +      -
    148N  PHE*     4.9     3.6    -      +       -      -
    210N  LEU*     4.2    23.6    -      -       +      -
    214N  ASN*     3.2    48.7    -      -       +      +
    215N  LEU*     4.3    16.4    -      -       +      -
     31P  LEU*     2.7    31.3    +      -       +      +
     32P  THR*     5.1     1.1    -      -       -      -
     34P  TRP*     1.3   102.6    -      +       -      +
     36P  HIS*     1.3    68.2    +      -       +      +
     38P  ASN      5.0     0.2    -      -       -      -
    305P  PEK      4.3    24.7    -      -       +      -
     58T  LYS*     2.8    29.3    +      -       -      -
     61T  SER*     3.4    17.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 36 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135N  ASN*     6.6     0.7    -      -       +      -
    140N  GLY*     3.3    30.2    +      -       -      -
    141N  ALA*     3.7    18.1    -      -       +      +
    144N  ASP*     2.6    31.4    +      -       +      -
    213N  ARG*     4.6     1.3    -      -       -      -
    214N  ASN*     3.7    11.4    +      -       -      -
     32P  THR*     2.9    25.3    +      -       +      +
     35P  PHE*     1.3    86.7    +      -       +      +
     37P  PHE*     1.3    86.4    +      -       +      +
     38P  ASN      3.4     3.1    -      -       -      -
     58T  LYS*     4.2    13.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 37 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118N  VAL*     5.8     1.1    -      -       +      -
    119N  GLU*     4.9    12.8    -      -       -      -
    141N  ALA*     4.3    19.1    -      -       +      -
    145N  LEU*     6.4     0.4    -      -       +      -
     32P  THR*     4.3     4.5    -      -       +      -
     33P  MET*     2.8    57.0    +      -       +      +
     36P  HIS*     1.3    97.2    -      -       +      +
     38P  ASN*     1.3    71.1    +      -       -      +
     39P  SER*     3.3     6.6    +      -       -      -
     52W  TRP*     3.7    27.6    -      +       +      -
     53W  ALA*     3.8    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 38 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33P  MET      3.1     2.8    +      -       -      -
     34P  TRP*     3.6    17.1    +      -       -      +
     36P  HIS      3.4     2.4    -      -       -      -
     37P  PHE*     1.3    80.1    -      -       -      +
     39P  SER*     1.3    57.4    +      -       -      +
    302P  DMU      4.8    10.0    +      -       -      -
     61T  SER*     4.0    19.2    -      -       -      +
----------------------------------------------------------
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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