Contacts of the helix formed by residues 944 - 969 (chain C) in PDB entry 1SO2


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with VAL 944 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678C  ASN*     2.7    36.3    +      -       +      +
    943C  LYS*     1.3    71.5    -      -       -      +
    945C  ARG*     1.3    58.2    +      -       +      +
    946C  ASP*     3.9    19.5    -      -       +      +
    947C  LEU*     2.8    46.0    +      -       +      +
    948C  HIS      3.0     8.8    +      -       -      -
   1064C  HIS*     3.6    19.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 945 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    943C  LYS      3.5     2.0    +      -       -      -
    944C  VAL*     1.3    73.9    -      -       +      +
    946C  ASP*     1.3    73.6    +      -       -      +
    947C  LEU      3.1     0.2    +      -       -      -
    948C  HIS*     3.2     3.0    +      -       -      +
    949C  LEU*     2.8    62.5    +      -       +      +
   1064C  HIS*     4.9     1.2    +      -       -      -
   1068C  ASN*     3.5    19.6    +      -       -      +
   1071C  ILE*     3.6    31.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 946 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682C  PHE*     5.7     0.3    -      -       -      -
    944C  VAL*     3.1    22.1    +      -       +      +
    945C  ARG*     1.3    92.4    +      -       -      +
    947C  LEU*     1.3    60.8    +      -       +      +
    949C  LEU*     4.5     5.9    -      -       -      +
    950C  LYS*     3.6    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 947 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678C  ASN*     3.7    47.1    -      -       +      +
    679C  PHE      4.2    13.9    -      -       -      +
    680C  PRO*     4.8     4.9    -      -       +      -
    681C  ILE*     4.5     6.5    -      -       +      +
    682C  PHE*     4.0    28.5    -      -       +      -
    940C  GLY      4.9     0.2    -      -       -      -
    943C  LYS*     3.9    21.5    -      -       +      +
    944C  VAL*     2.8    14.8    +      -       +      +
    946C  ASP*     1.3    77.0    -      -       +      +
    948C  HIS*     1.3    67.6    +      -       -      +
    950C  LYS*     3.1    13.4    +      -       -      +
    951C  TRP*     3.2    28.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 948 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    463C  666      3.1    13.7    +      -       -      +
    940C  GLY*     3.2    23.7    +      -       -      +
    941C  PRO*     3.6    16.4    -      -       +      +
    944C  VAL      3.0     8.2    +      -       -      +
    945C  ARG      3.6     6.3    -      -       -      +
    947C  LEU*     1.3    78.6    -      -       -      +
    949C  LEU*     1.3    68.1    +      -       +      +
    951C  TRP      3.4     1.0    +      -       -      -
    952C  THR*     2.9    44.9    +      -       -      -
    988C  GLN*     3.5    13.0    -      -       -      -
    992C  ILE*     5.1     2.0    -      -       +      -
   1068C  ASN*     3.5    40.1    -      -       +      +
   1071C  ILE*     4.4     4.7    -      -       +      -
   1072C  TRP*     3.1    31.0    +      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 949 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    945C  ARG*     2.8    60.0    +      -       +      +
    946C  ASP*     4.5     6.3    -      -       -      +
    948C  HIS*     1.3    78.1    -      -       +      +
    950C  LYS*     1.3    65.8    +      -       -      +
    952C  THR*     3.8     4.8    -      -       +      +
    953C  GLU*     3.1    23.9    +      -       -      +
   1071C  ILE*     4.8     7.0    -      -       +      -
   1072C  TRP*     3.6    35.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 950 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682C  PHE*     3.5    48.8    -      -       +      -
    946C  ASP      3.6    14.2    +      -       -      +
    947C  LEU      3.1    10.2    +      -       -      +
    949C  LEU*     1.3    79.5    -      -       -      +
    951C  TRP*     1.3    62.4    +      -       -      +
    953C  GLU*     3.4    27.2    +      -       -      +
    954C  GLY*     3.2    16.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 951 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    463C  666      3.8    23.3    -      -       +      +
    681C  ILE*     4.3     4.2    -      -       +      +
    682C  PHE*     3.5    31.1    -      +       -      -
    735C  PRO      5.5     4.0    -      -       -      -
    736C  TYR*     3.7    30.7    -      +       +      -
    738C  ASN*     4.9     1.8    -      -       -      -
    740C  ILE*     3.5    29.4    -      -       +      -
    741C  HIS*     3.7    34.3    -      -       +      -
    744C  ASP*     3.9    35.6    +      -       +      -
    939C  ASN*     5.1     2.8    -      -       -      +
    940C  GLY*     4.4    14.1    -      -       -      -
    943C  LYS*     5.3     1.7    -      -       +      +
    947C  LEU*     3.2    33.5    +      -       +      +
    948C  HIS      4.0     1.3    -      -       -      +
    950C  LYS*     1.3    73.4    -      -       -      +
    952C  THR*     1.3    66.1    +      -       -      +
    953C  GLU      3.1     1.8    -      -       -      -
    954C  GLY*     3.1    10.4    +      -       -      +
    955C  ILE*     3.1    15.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 952 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    463C  666      3.3     3.9    +      -       -      -
    948C  HIS*     2.9    32.1    +      -       -      -
    949C  LEU*     3.8     9.2    -      -       +      -
    950C  LYS      3.4     0.2    -      -       -      -
    951C  TRP*     1.3    75.7    -      -       -      +
    953C  GLU*     1.3    65.0    +      -       -      +
    955C  ILE*     3.1    22.2    -      -       -      +
    956C  VAL*     3.1    11.7    +      -       +      +
    984C  LEU*     3.6    31.9    -      -       +      -
    988C  GLN*     2.7    30.1    +      -       +      +
   1072C  TRP*     4.4     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 953 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    949C  LEU      3.1    12.1    +      -       -      +
    950C  LYS*     3.4    30.4    +      -       -      +
    951C  TRP      3.1     0.2    -      -       -      -
    952C  THR*     1.3    82.9    -      -       -      +
    954C  GLY*     1.3    61.6    +      -       -      +
    956C  VAL*     3.2     8.8    -      -       +      +
    957C  ASN*     3.1    47.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 954 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    735C  PRO*     3.6    31.7    -      -       -      +
    736C  TYR*     3.6    10.7    -      -       -      +
    950C  LYS      3.2     8.3    +      -       -      -
    951C  TRP*     3.1     8.9    +      -       -      -
    953C  GLU*     1.3    81.1    -      -       -      +
    955C  ILE*     1.3    56.2    +      -       -      +
    957C  ASN*     4.8     1.1    -      -       -      -
    958C  GLU*     3.1    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 955 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    463C  666      3.9    43.1    -      -       +      +
    736C  TYR*     3.4    34.8    -      -       +      -
    737C  HIS*     4.3    11.2    -      -       +      -
    951C  TRP      3.1    10.9    +      -       -      +
    952C  THR*     3.1    21.3    -      -       -      +
    954C  GLY*     1.3    74.2    -      -       -      +
    956C  VAL*     1.3    64.2    +      -       +      +
    958C  GLU*     4.6     3.8    -      -       +      +
    959C  PHE*     2.9    59.4    +      -       +      -
    987C  LEU*     5.0     2.0    -      -       +      -
    988C  GLN*     4.9     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 956 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    952C  THR*     3.1    16.3    +      -       +      +
    953C  GLU*     3.2    18.8    -      -       +      +
    955C  ILE*     1.3    74.1    -      -       +      +
    957C  ASN*     1.3    78.7    +      -       -      +
    959C  PHE*     3.3     9.3    +      -       -      +
    960C  TYR*     3.0    44.9    +      -       +      +
    976C  PHE      5.8     0.4    -      -       -      +
    984C  LEU*     3.7    36.1    -      -       +      -
    987C  LEU*     4.0    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 957 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    735C  PRO*     3.9    16.2    -      -       +      +
    953C  GLU*     3.1    41.9    +      -       -      +
    954C  GLY*     3.7     5.2    -      -       -      +
    956C  VAL*     1.3    89.4    -      -       -      +
    958C  GLU*     1.3    63.1    +      -       -      +
    960C  TYR*     3.0    25.4    +      -       -      +
    961C  GLU*     3.2    14.6    +      -       -      +
    979C  ARG*     4.8     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 958 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    734C  ILE*     3.2    10.3    -      -       +      +
    735C  PRO*     3.4    20.1    -      -       +      +
    736C  TYR*     3.0    29.5    +      -       +      -
    737C  HIS*     2.5    43.1    +      -       -      -
    825C  HIS*     3.9     0.3    -      -       -      -
    827C  GLY*     3.4    39.5    -      -       -      +
    828C  ARG*     5.6     0.7    -      -       -      +
    954C  GLY      3.1    11.5    +      -       -      +
    955C  ILE*     4.0     7.5    -      -       +      +
    957C  ASN*     1.3    78.5    -      -       -      +
    959C  PHE*     1.3    64.7    +      -       +      +
    961C  GLU*     3.2    18.5    +      -       -      +
    962C  GLN*     3.3    10.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 959 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    463C  666      3.8    63.5    -      +       +      -
    737C  HIS*     6.0     0.2    -      +       -      -
    829C  THR*     4.9     6.1    -      -       +      -
    955C  ILE*     2.9    43.9    +      -       +      +
    956C  VAL*     3.5     7.0    -      -       -      +
    957C  ASN      3.2     0.2    -      -       -      -
    958C  GLU*     1.3    80.3    -      -       +      +
    960C  TYR*     1.3    57.8    +      -       -      +
    962C  GLN*     3.2     7.3    +      -       -      +
    963C  GLY      3.0    20.8    +      -       -      -
    976C  PHE*     4.1    24.0    -      -       +      +
    977C  MET*     3.3    36.5    -      -       +      +
    987C  LEU*     3.9    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 960 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    956C  VAL*     3.0    34.7    +      -       +      +
    957C  ASN*     3.0    15.9    +      -       -      +
    959C  PHE*     1.3    71.4    -      -       -      +
    961C  GLU*     1.3    59.6    +      -       -      +
    962C  GLN      3.1     1.8    -      -       -      -
    963C  GLY*     3.1     0.9    +      -       -      -
    964C  ASP*     2.9    33.6    +      -       -      +
    976C  PHE      3.6    19.7    -      -       -      -
    977C  MET      3.7    17.4    -      -       -      +
    978C  ASP      3.7    13.5    -      -       -      -
    979C  ARG*     2.9    56.9    +      -       +      +
    982C  PRO*     3.3    25.9    -      -       +      +
    983C  GLN      4.8     1.4    +      -       -      -
    984C  LEU*     5.3     6.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 961 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    734C  ILE*     5.3     3.2    -      -       -      +
    735C  PRO*     3.3    37.9    -      -       -      +
    828C  ARG*     3.8    18.7    +      -       -      +
    957C  ASN*     3.2     9.4    +      -       -      +
    958C  GLU*     3.2    13.1    +      -       -      +
    960C  TYR*     1.3    76.8    -      -       -      +
    962C  GLN*     1.3    60.9    +      -       -      +
    964C  ASP*     3.5    10.3    +      -       -      +
    965C  GLU*     3.3    21.3    +      -       -      +
    979C  ARG*     3.8     5.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 962 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    827C  GLY      4.1     2.0    -      -       -      +
    828C  ARG*     3.2    32.4    -      -       +      +
    829C  THR*     3.0    44.3    +      -       -      +
    832C  PHE*     3.9    13.3    -      -       +      +
    958C  GLU      3.3     6.7    +      -       -      +
    959C  PHE*     3.2    12.1    +      -       +      +
    960C  TYR      3.1     0.6    -      -       -      -
    961C  GLU*     1.3    78.4    -      -       -      +
    963C  GLY*     1.3    55.3    +      -       -      +
    965C  GLU*     3.4     2.4    +      -       -      +
    966C  GLU*     2.7    63.9    +      -       +      +
    974C  SER*     4.0     2.4    +      -       -      -
    977C  MET*     3.5    26.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 963 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    959C  PHE      3.0    10.7    +      -       -      -
    960C  TYR      3.1     0.8    +      -       -      -
    962C  GLN*     1.3    72.6    -      -       -      +
    964C  ASP*     1.3    70.2    +      -       -      +
    966C  GLU*     3.3    17.2    +      -       -      +
    967C  ALA*     3.0    15.8    +      -       -      +
    973C  ILE*     3.5    14.9    -      -       -      +
    977C  MET*     3.2    25.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 964 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    960C  TYR      2.9    15.3    +      -       -      +
    961C  GLU*     3.6    11.8    -      -       -      +
    963C  GLY*     1.3    74.9    -      -       -      +
    965C  GLU*     1.3    55.2    +      -       -      +
    967C  ALA*     2.7    28.9    +      -       -      +
    968C  ASN*     2.9    24.6    +      -       -      +
    977C  MET      5.4     0.2    -      -       -      +
    979C  ARG*     3.0    43.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 965 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    828C  ARG*     2.7    27.3    +      -       -      +
    832C  PHE*     3.4    33.3    -      -       +      -
    961C  GLU      3.3    10.9    +      -       -      +
    962C  GLN      3.8     4.9    -      -       -      +
    964C  ASP*     1.3    77.5    -      -       -      +
    966C  GLU*     1.3    62.7    +      -       -      +
    968C  ASN*     3.2    12.0    +      -       +      +
    969C  LEU*     3.1    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 966 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    832C  PHE*     3.7    22.0    -      -       +      +
    962C  GLN*     2.7    49.0    +      -       +      +
    963C  GLY*     3.5    14.1    -      -       -      +
    965C  GLU*     1.3    73.5    -      -       -      +
    967C  ALA*     1.3    59.0    +      -       -      +
    969C  LEU*     3.5     2.3    +      -       -      +
    971C  LEU*     2.8    44.2    +      -       +      +
    972C  PRO      4.0    13.1    -      -       -      +
    973C  ILE*     3.6     4.6    -      -       -      -
    974C  SER*     2.5    50.0    +      -       -      -
    977C  MET*     4.2     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 967 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    963C  GLY      3.0     5.9    +      -       -      +
    964C  ASP*     2.7    17.3    +      -       -      +
    966C  GLU*     1.3    68.5    -      -       -      +
    968C  ASN*     1.3    57.5    +      -       -      +
    969C  LEU      2.9     5.2    -      -       -      -
    970C  GLY*     2.9    19.4    +      -       -      -
    971C  LEU      3.9     3.4    -      -       -      -
    973C  ILE*     3.3    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 968 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    964C  ASP*     2.9    36.5    +      -       -      +
    965C  GLU*     3.2    10.8    +      -       -      +
    967C  ALA*     1.3    76.1    -      -       -      +
    969C  LEU*     1.3    65.7    +      -       +      +
    970C  GLY      3.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 969 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    832C  PHE*     4.2     1.1    -      -       +      -
    836C  THR*     4.2    15.3    -      -       +      -
    965C  GLU*     3.1    43.0    +      -       +      +
    966C  GLU      3.8     0.9    -      -       -      +
    967C  ALA      2.9     1.6    -      -       -      -
    968C  ASN*     1.3    85.8    -      -       +      +
    970C  GLY*     1.3    62.1    +      -       -      +
    971C  LEU*     3.0    34.6    +      -       +      +
----------------------------------------------------------
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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