Contacts of the helix formed by residues 9 - 37 (chain R) in PDB entry 2QJK


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with GLY 9 (chain R).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250Q  ARG*     6.0     0.6    -      -       -      +
     10R  THR*     1.3    59.9    +      -       -      -
     11R  ARG*     3.2    20.8    +      -       -      +
     12R  ARG*     3.6    41.7    +      -       -      +
     13R  ASP*     3.8     5.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 10 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9R  GLY*     1.3    71.3    -      -       -      -
     11R  ARG*     1.3    60.9    +      -       -      +
     12R  ARG      3.6     1.1    -      -       -      -
     13R  ASP*     3.7    16.4    +      -       +      +
     14R  PHE*     3.0    34.3    -      -       +      +
     17R  TYR*     6.2     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 11 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250Q  ARG*     5.6     6.7    -      -       -      +
      9R  GLY*     3.2    13.8    -      -       -      +
     10R  THR*     1.3    82.7    -      -       -      +
     12R  ARG*     1.3    62.9    +      -       -      +
     14R  PHE*     3.6    16.6    -      -       -      +
     15R  LEU*     3.6     7.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 12 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250Q  ARG*     2.9    55.4    -      -       -      +
      9R  GLY*     3.6    31.5    +      -       -      +
     11R  ARG*     1.3    77.2    -      -       -      +
     13R  ASP*     1.3    77.0    +      -       +      +
     14R  PHE      3.2     0.4    -      -       -      -
     15R  LEU*     3.1     6.7    +      -       -      +
     16R  TYR*     2.9    46.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 13 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9R  GLY      3.8     6.1    -      -       -      +
     10R  THR*     3.7    26.5    +      -       +      +
     11R  ARG      3.4     0.2    -      -       -      -
     12R  ARG*     1.3    82.9    -      -       +      +
     14R  PHE*     1.3    65.9    +      -       -      +
     16R  TYR*     3.3    13.8    +      -       -      +
     17R  TYR*     3.0    58.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 14 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243Q  LEU*     6.3     0.7    -      -       +      -
     10R  THR*     3.0    30.5    +      -       +      +
     11R  ARG*     3.6     9.2    -      -       -      +
     12R  ARG      3.2     0.2    -      -       -      -
     13R  ASP*     1.3    76.3    -      -       -      +
     15R  LEU*     1.3    72.0    +      -       +      +
     17R  TYR*     2.9     9.1    +      -       +      +
     18R  ALA*     2.7    53.4    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 15 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243Q  LEU*     3.9    29.6    -      -       +      +
    246Q  LEU*     3.9    24.5    -      -       +      -
    247Q  THR*     3.6    39.3    -      -       -      +
    250Q  ARG*     4.7    16.2    -      -       +      -
     11R  ARG      3.6     8.2    +      -       -      +
     12R  ARG*     3.1     9.3    +      -       -      +
     14R  PHE*     1.3    91.1    -      -       +      +
     16R  TYR*     1.3    56.7    +      -       +      +
     18R  ALA*     2.9     5.5    +      -       -      +
     19R  THR*     2.7    37.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 16 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250P  ILE*     6.0     1.3    -      -       +      -
    247Q  THR*     4.1    27.1    +      -       +      -
    250Q  ARG*     4.3    19.2    +      -       -      -
    251Q  LEU*     4.6    20.8    -      -       +      +
     12R  ARG*     2.9    46.7    +      -       +      +
     13R  ASP*     3.5    18.4    -      -       -      +
     15R  LEU*     1.3    80.3    -      -       +      +
     17R  TYR*     1.3    59.8    +      -       +      +
     19R  THR*     3.7     7.2    -      -       -      +
     20R  ALA*     3.1    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 17 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10R  THR*     6.2     0.7    -      -       +      -
     13R  ASP*     3.0    50.9    +      -       -      +
     14R  PHE*     2.9    11.6    +      -       +      +
     16R  TYR*     1.3    76.2    -      -       +      +
     18R  ALA*     1.3    65.0    +      -       -      +
     19R  THR      3.2     1.3    -      -       -      -
     20R  ALA*     4.3     5.6    -      -       +      +
     21R  GLY*     3.3    18.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 18 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243Q  LEU*     3.7    23.2    -      -       +      +
     14R  PHE*     2.7    39.9    +      -       +      +
     15R  LEU*     3.5     9.0    -      -       -      +
     17R  TYR*     1.3    73.8    -      -       -      +
     19R  THR*     1.3    62.9    +      -       -      +
     21R  GLY*     3.5     2.0    +      -       -      -
     22R  ALA*     3.2    16.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 19 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240Q  LEU*     4.4     4.7    -      -       +      +
    243Q  LEU*     3.4    27.0    -      -       -      +
    244Q  LEU*     4.1    21.3    +      -       +      +
    247Q  THR*     3.3    26.6    +      -       +      +
     15R  LEU*     2.7    15.0    +      -       -      +
     16R  TYR*     3.7     8.3    -      -       -      +
     18R  ALA*     1.3    73.9    -      -       -      +
     20R  ALA*     1.3    70.8    +      -       +      +
     21R  GLY      2.7     5.6    +      -       -      -
     22R  ALA*     2.8    14.7    +      -       -      +
     23R  GLY*     3.0    10.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 20 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16R  TYR      3.1    14.9    +      -       -      +
     17R  TYR*     4.5     7.0    -      -       +      +
     19R  THR*     1.3    84.5    -      -       +      +
     21R  GLY*     1.3    60.7    +      -       -      +
     23R  GLY*     3.3     3.4    +      -       -      +
     24R  ALA*     3.0    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 21 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17R  TYR      3.3    13.2    +      -       -      -
     18R  ALA*     3.7     5.2    -      -       -      -
     19R  THR      2.7     2.6    +      -       -      -
     20R  ALA*     1.3    76.1    -      -       -      +
     22R  ALA*     1.3    65.1    +      -       -      -
     23R  GLY      3.2     0.3    +      -       -      -
     24R  ALA*     3.2     8.5    +      -       -      +
     25R  VAL*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 22 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236Q  PHE*     5.1     8.4    -      -       +      +
    239Q  VAL*     5.3     4.5    -      -       +      -
    240Q  LEU*     3.9    26.8    -      -       +      +
    243Q  LEU*     4.4    10.1    -      -       +      -
     18R  ALA      3.2    11.1    +      -       -      +
     19R  THR      2.8    10.2    +      -       -      +
     21R  GLY*     1.3    70.3    -      -       -      -
     23R  GLY*     1.3    68.2    +      -       -      +
     25R  VAL*     3.1    12.7    +      -       -      +
     26R  ALA*     3.0    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 23 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240Q  LEU*     4.2    15.5    -      -       -      +
     19R  THR      3.0    11.7    +      -       -      -
     20R  ALA*     3.6     5.4    -      -       -      -
     21R  GLY      3.1     0.2    -      -       -      -
     22R  ALA*     1.3    79.7    -      -       -      +
     24R  ALA*     1.3    65.4    +      -       -      +
     26R  ALA*     3.0     3.2    +      -       -      +
     27R  THR*     2.9    25.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 24 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20R  ALA      3.0    12.7    +      -       -      +
     21R  GLY*     3.5     9.9    -      -       -      +
     23R  GLY*     1.3    72.8    -      -       -      +
     25R  VAL*     1.3    65.2    +      -       +      +
     27R  THR*     3.1    11.2    +      -       -      -
     28R  GLY*     3.0    20.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 25 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236Q  PHE*     3.1    33.2    -      -       +      -
     21R  GLY      3.0    19.2    +      -       -      +
     22R  ALA*     3.2    14.1    -      -       -      +
     23R  GLY      3.1     0.2    +      -       -      -
     24R  ALA*     1.3    77.6    -      -       +      +
     26R  ALA*     1.3    66.8    +      -       -      +
     28R  GLY*     3.2     1.9    +      -       -      -
     29R  ALA*     3.0    16.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 26 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236Q  PHE*     4.1    22.9    -      -       +      -
    237Q  LEU*     6.2     1.8    -      -       +      -
    240Q  LEU*     4.8    14.4    -      -       +      -
     22R  ALA      3.0     6.6    +      -       -      +
     23R  GLY*     3.0     9.0    +      -       -      +
     25R  VAL*     1.3    76.4    -      -       -      +
     27R  THR*     1.3    58.8    +      -       -      +
     29R  ALA*     2.5    35.5    +      -       -      +
     30R  ALA*     3.0    10.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 27 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23R  GLY      2.9    17.2    +      -       -      -
     24R  ALA*     3.2    14.2    -      -       -      +
     26R  ALA*     1.3    74.3    -      -       -      +
     28R  GLY*     1.3    63.1    +      -       -      +
     30R  ALA*     3.2     8.8    -      -       -      +
     31R  VAL*     3.1    35.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 28 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24R  ALA      3.0    12.9    +      -       -      -
     25R  VAL      3.7     2.7    -      -       -      -
     26R  ALA      2.8     1.4    +      -       -      -
     27R  THR*     1.3    72.5    -      -       -      +
     29R  ALA*     1.3    58.1    +      -       -      +
     30R  ALA      2.9     5.7    +      -       -      -
     31R  VAL*     3.0     8.9    +      -       -      +
     32R  TRP*     2.8    32.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 29 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236Q  PHE*     3.8    25.1    -      -       +      -
     25R  VAL      3.0    12.4    +      -       -      +
     26R  ALA      2.5    16.9    +      -       -      +
     28R  GLY*     1.3    69.6    -      -       -      +
     30R  ALA*     1.3    54.1    +      -       -      -
     32R  TRP*     4.5     2.9    -      -       -      +
     33R  PRO*     2.9    24.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 30 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26R  ALA      3.0     7.4    +      -       -      +
     27R  THR*     3.2    13.2    -      -       -      +
     29R  ALA*     1.3    76.9    -      -       -      +
     31R  VAL*     1.3    65.1    +      -       +      +
     33R  PRO*     2.8    24.9    -      -       -      +
     34R  LEU*     3.4    17.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 31 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27R  THR*     3.2    24.9    -      -       +      +
     28R  GLY*     3.5     9.4    -      -       -      +
     30R  ALA*     1.3    76.3    -      -       +      +
     32R  TRP*     1.3    69.0    +      -       -      +
     34R  LEU*     3.0    23.4    +      -       +      +
     35R  ILE*     3.1    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 32 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28R  GLY      2.8    17.5    +      -       -      +
     29R  ALA*     4.5     3.4    -      -       -      +
     31R  VAL*     1.3    73.4    -      -       -      +
     33R  PRO*     1.4    63.4    -      -       +      +
     35R  ILE*     2.6    53.3    +      -       +      +
     36R  ASN*     2.7    54.8    +      -       +      +
     39R  ASN*     4.3     6.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 33 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88P  ASN      4.5     5.4    -      -       -      +
     89P  GLY*     6.0     4.3    -      -       -      -
     93P  LEU*     4.8    12.0    -      -       +      +
     29R  ALA      2.9    23.8    -      -       -      +
     30R  ALA*     2.8    26.5    -      -       -      +
     32R  TRP*     1.4    91.6    -      -       +      +
     34R  LEU*     1.3    60.5    +      -       +      +
     35R  ILE      3.0     0.2    -      -       -      -
     36R  ASN*     3.8     9.2    -      -       +      +
     37R  GLN*     3.1    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 34 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60P  VAL*     4.0    29.8    -      -       +      -
     61P  THR*     5.1     2.0    -      -       +      -
     64P  VAL*     3.9    25.6    -      -       +      +
     93P  LEU*     4.6    17.5    -      -       +      -
     30R  ALA*     3.5    17.9    -      -       +      +
     31R  VAL*     3.0    18.4    +      -       +      +
     33R  PRO*     1.3    78.5    -      -       +      +
     35R  ILE*     1.3    60.2    +      -       +      +
     37R  GLN*     3.0    29.6    +      -       -      +
     38R  MET*     5.1     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 35 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179M  TRP*     3.1    46.8    +      -       +      +
     31R  VAL*     3.3    33.0    -      -       +      +
     32R  TRP*     2.6    28.1    +      -       +      +
     34R  LEU*     1.3    79.0    -      -       +      +
     36R  ASN*     1.3    66.3    +      -       -      +
     37R  GLN      3.1     1.3    -      -       -      -
     38R  MET*     3.0    14.2    +      -       -      +
     39R  ASN*     5.8     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 36 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88P  ASN*     3.0    27.4    +      -       +      +
     32R  TRP*     2.7    53.4    +      -       +      +
     33R  PRO*     4.2     7.2    -      -       +      -
     35R  ILE*     1.3    74.2    -      -       -      +
     37R  GLN*     1.3    55.6    +      -       -      +
     38R  MET      2.9     0.2    -      -       -      -
     39R  ASN*     2.6    61.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 37 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64P  VAL*     3.6    25.7    -      -       +      +
     67P  MET*     3.7    15.8    -      -       -      +
     68P  HIS*     2.7    39.0    +      -       -      -
     87P  VAL*     3.6    22.9    -      -       +      +
     88P  ASN*     3.5    23.9    +      -       -      +
     93P  LEU*     4.1     9.6    -      -       +      -
     33R  PRO      3.1    15.0    +      -       -      +
     34R  LEU*     3.0    30.6    +      -       -      +
     36R  ASN*     1.3    75.9    -      -       -      +
     38R  MET*     1.3    89.3    +      -       -      +
     39R  ASN      3.5     7.8    -      -       -      +
     41R  SER*     6.1     0.2    -      -       -      -
----------------------------------------------------------
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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