Contacts of the helix formed by residues 961 - 989 (chain D) in PDB entry 1C1G


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 ALA 961 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677C  ALA*     4.4    20.0    -      -       +      +
    678C  LEU*     4.7     6.7    -      -       +      -
    681C  LEU*     4.3    25.1    -      -       +      +
    957D  ARG*     3.2    17.8    +      -       +      +
    958D  LEU      4.0     1.1    -      -       -      +
    960D  THR*     1.3    77.3    +      -       -      +
    962D  LEU*     1.3    61.0    +      -       -      +
    964D  LYS*     3.7    11.3    -      -       -      +
    965D  LEU*     3.2    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 962 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677C  ALA*     5.8     1.3    -      -       +      -
    958D  LEU*     3.1    34.4    +      -       +      +
    959D  ALA*     3.1    14.6    +      -       +      +
    961D  ALA*     1.3    75.1    -      -       -      +
    963D  GLN*     1.3    65.9    +      -       +      +
    965D  LEU*     3.1    43.0    +      -       +      +
    966D  GLU*     3.2    12.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 963 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    959D  ALA      3.5     9.3    -      -       -      +
    960D  THR*     3.2    28.0    +      -       -      +
    962D  LEU*     1.3    77.4    -      -       +      +
    964D  LYS*     1.3    70.5    +      -       +      +
    965D  LEU      3.5     0.2    -      -       -      -
    966D  GLU*     4.0    10.5    -      -       -      +
    967D  GLU*     3.1    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 964 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    681C  LEU*     4.1    22.5    -      -       +      +
    684C  ALA*     5.3     0.2    -      -       -      +
    960D  THR*     3.1    29.7    +      -       -      +
    961D  ALA*     3.7     5.3    -      -       -      -
    962D  LEU      3.2     0.8    -      -       -      -
    963D  GLN*     1.3    88.4    +      -       -      +
    965D  LEU*     1.3    68.0    +      -       -      +
    966D  GLU      3.3     0.4    -      -       -      -
    967D  GLU*     2.6    53.3    +      -       -      +
    968D  ALA*     3.2    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 965 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677C  ALA*     5.3     5.6    -      -       +      -
    680C  LYS*     3.2    51.6    +      -       +      +
    681C  LEU*     4.4     0.4    -      -       -      +
    684C  ALA*     5.3     0.5    -      -       -      +
    961D  ALA      3.2    11.4    +      -       -      +
    962D  LEU*     3.1    37.7    +      -       +      +
    964D  LYS*     1.3    81.9    -      -       -      +
    966D  GLU*     1.3    69.0    +      -       +      +
    968D  ALA*     3.9     2.0    -      -       -      +
    969D  GLU*     3.1    51.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 966 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    962D  LEU*     3.5    17.3    -      -       -      +
    963D  GLN*     4.0    10.7    -      -       -      +
    965D  LEU*     1.3    84.1    -      -       +      +
    967D  GLU*     1.3    56.9    +      -       -      +
    969D  GLU*     3.4    16.2    -      -       -      +
    970D  LYS*     2.7    56.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 967 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    963D  GLN      3.1    16.8    +      -       -      +
    964D  LYS*     2.6    38.7    +      -       -      +
    965D  LEU      3.4     0.6    +      -       -      -
    966D  GLU*     1.3    74.2    -      -       -      +
    968D  ALA*     1.3    67.9    +      -       -      +
    970D  LYS*     3.0    25.3    +      -       +      +
    971D  ALA*     3.2    12.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 968 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    681C  LEU*     6.1     0.4    -      -       +      -
    684C  ALA*     3.9    30.8    -      -       +      +
    685C  GLU*     6.1     0.9    -      -       +      -
    688C  ALA*     5.8     3.6    -      -       -      +
    964D  LYS      3.2    18.4    +      -       -      +
    965D  LEU      3.9     2.2    -      -       -      +
    967D  GLU*     1.3    79.1    +      -       -      +
    969D  GLU*     1.3    62.4    +      -       -      +
    971D  ALA*     3.5     8.5    +      -       -      +
    972D  ALA*     3.2    18.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 969 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    680C  LYS*     5.7     3.4    -      -       +      +
    684C  ALA*     6.0     3.8    -      -       +      -
    965D  LEU*     3.1    41.8    +      -       +      +
    966D  GLU*     3.4    21.8    -      -       -      +
    967D  GLU      3.1     0.2    -      -       -      -
    968D  ALA*     1.3    74.9    -      -       -      +
    970D  LYS*     1.3    54.9    +      -       +      +
    972D  ALA*     2.7    31.3    +      -       -      +
    973D  ASP*     3.0    17.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 970 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    966D  GLU*     2.7    62.2    +      -       -      +
    967D  GLU*     3.0    13.9    +      -       +      +
    969D  GLU*     1.3    75.3    -      -       +      +
    971D  ALA*     1.3    62.3    +      -       -      +
    972D  ALA      3.3     0.2    +      -       -      -
    973D  ASP*     3.4    11.6    +      -       -      +
    974D  GLU*     3.2    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 971 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    688C  ALA*     6.3     3.4    -      -       +      -
    967D  GLU      3.2     8.1    +      -       -      +
    968D  ALA*     3.7    11.2    -      -       -      +
    970D  LYS*     1.3    79.5    -      -       -      +
    972D  ALA*     1.3    54.5    +      -       -      +
    974D  GLU*     3.4    18.7    -      -       -      +
    975D  SER*     2.8    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 972 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    684C  ALA      6.0     0.4    -      -       -      +
    687C  ALA*     5.4    14.1    -      -       +      -
    688C  ALA*     5.8     8.3    -      -       +      +
    691C  SER*     5.5     4.9    -      -       -      +
    968D  ALA      3.2    12.1    +      -       -      +
    969D  GLU*     2.7    21.2    +      -       -      +
    971D  ALA*     1.3    67.3    -      -       -      +
    973D  ASP*     1.3    56.8    +      -       -      +
    975D  SER*     2.8    29.0    +      -       -      -
    976D  GLU*     3.2    11.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 973 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    969D  GLU*     3.0    20.3    +      -       -      +
    970D  LYS*     3.6    10.7    -      -       -      +
    972D  ALA*     1.3    74.2    -      -       -      +
    974D  GLU*     1.3    63.3    +      -       +      +
    976D  GLU*     3.0    19.5    +      -       -      +
    977D  ARG*     3.2    24.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 974 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    695C  MET*     5.3     0.5    -      -       -      +
    970D  LYS*     3.2    13.1    +      -       +      +
    971D  ALA*     3.4    27.7    +      -       -      +
    973D  ASP*     1.3    78.3    -      -       +      +
    975D  SER*     1.3    56.4    +      -       -      +
    977D  ARG*     3.7    13.9    +      -       -      +
    978D  GLY*     3.2    23.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 975 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    688C  ALA*     5.9     2.7    -      -       -      -
    691C  SER*     4.2    27.4    -      -       -      +
    692C  GLU*     5.4     1.3    -      -       -      -
    695C  MET*     4.1    23.5    -      -       -      +
    971D  ALA*     2.8    15.0    +      -       -      +
    972D  ALA*     2.8    19.1    +      -       -      -
    974D  GLU*     1.3    72.4    -      -       -      +
    976D  GLU*     1.3    54.6    +      -       -      -
    979D  MET*     3.2    24.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 976 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    691C  SER*     6.1     1.3    -      -       -      -
    972D  ALA      3.2     6.9    +      -       -      +
    973D  ASP*     3.0    12.4    +      -       -      +
    975D  SER*     1.3    73.2    -      -       -      +
    977D  ARG*     1.3    60.0    +      -       +      +
    978D  GLY      3.4     0.2    -      -       -      -
    979D  MET*     3.7    21.0    -      -       +      +
    980D  LYS*     2.5    61.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 977 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    973D  ASP*     3.2    22.8    +      -       +      +
    974D  GLU*     3.9    11.4    -      -       -      +
    976D  GLU*     1.3    76.4    -      -       +      +
    978D  GLY*     1.3    59.1    +      -       -      +
    980D  LYS*     2.9    31.8    +      -       -      +
    981D  VAL*     3.2    13.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 978 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    695C  MET*     4.8    11.7    -      -       -      -
    974D  GLU      3.2    13.7    +      -       -      -
    975D  SER      4.3     1.6    -      -       -      -
    977D  ARG*     1.3    78.7    -      -       -      +
    979D  MET*     1.3    61.1    +      -       -      +
    981D  VAL*     3.3    13.7    +      -       -      +
    982D  ILE*     3.2    25.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 979 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    691C  SER*     4.9    17.3    -      -       -      +
    694C  GLY*     5.0    11.0    -      -       -      -
    695C  MET*     4.8    13.0    -      -       +      +
    698C  ILE*     5.6     1.3    -      -       +      -
    975D  SER      3.2    21.5    +      -       -      +
    976D  GLU*     3.8    22.7    -      -       +      +
    977D  ARG      3.2     0.8    -      -       -      -
    978D  GLY*     1.3    75.5    -      -       -      +
    980D  LYS*     1.3    64.4    +      -       +      +
    982D  ILE*     3.3    11.4    -      -       +      +
    983D  GLU*     3.2    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 980 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    976D  GLU*     2.5    61.3    +      -       -      +
    977D  ARG*     2.9    18.8    +      -       -      +
    979D  MET*     1.3    82.4    -      -       +      +
    981D  VAL*     1.3    56.6    +      -       -      +
    983D  GLU*     3.8     4.6    -      -       -      +
    984D  SER*     2.9    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 981 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    977D  ARG      3.2     8.3    +      -       -      +
    978D  GLY*     3.3    21.3    -      -       -      +
    980D  LYS*     1.3    76.3    -      -       -      +
    982D  ILE*     1.3    60.8    +      -       +      +
    984D  SER*     4.2     3.9    -      -       -      +
    985D  ARG*     3.1    28.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 982 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    695C  MET*     4.1    12.3    -      -       +      +
    698C  ILE*     3.2    53.8    -      -       +      +
    699C  GLU*     4.0    30.3    -      -       +      +
    702C  ALA*     5.3     3.6    -      -       +      -
    978D  GLY      3.2    18.9    +      -       -      +
    979D  MET*     3.3    17.3    -      -       -      +
    981D  VAL*     1.3    76.7    -      -       +      +
    983D  GLU*     1.3    65.5    +      -       -      +
    985D  ARG*     3.7    18.1    -      -       -      +
    986D  ALA*     3.2    15.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 983 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    698C  ILE*     4.1    22.4    -      -       +      +
    979D  MET*     3.2    33.8    +      -       +      +
    980D  LYS*     3.8     6.5    -      -       -      +
    982D  ILE*     1.3    79.1    -      -       +      +
    984D  SER*     1.3    64.6    +      -       -      +
    985D  ARG      3.1     1.7    +      -       -      -
    986D  ALA*     3.2     9.9    +      -       -      +
    987D  GLN*     3.2    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 984 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    980D  LYS*     2.9    19.6    +      -       -      +
    981D  VAL*     4.5     3.4    -      -       -      -
    983D  GLU*     1.3    74.5    -      -       -      +
    985D  ARG*     1.3    66.8    +      -       -      +
    987D  GLN*     3.9    16.6    +      -       -      +
    988D  LYS*     3.2    38.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 985 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    702C  ALA*     4.8     8.9    -      -       -      +
    706C  GLU*     2.7    41.2    +      -       -      +
    981D  VAL*     3.1    22.1    +      -       +      +
    982D  ILE*     3.7    19.4    -      -       -      +
    983D  GLU      3.2     0.2    -      -       -      -
    984D  SER*     1.3    72.9    -      -       -      +
    986D  ALA*     1.3    52.7    +      -       -      +
    987D  GLN      2.6    16.1    +      -       -      -
    988D  LYS*     2.6    21.3    +      -       -      -
    989D  ASP*     2.8    22.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 986 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    698C  ILE*     3.6    24.7    -      -       +      +
    701C  ARG*     4.5     5.4    -      -       +      -
    702C  ALA*     5.0     3.1    -      -       +      +
    705C  ASP*     5.1     1.2    -      -       -      +
    708C  LYS*     3.8    19.0    +      -       -      +
    982D  ILE      3.2    14.0    +      -       -      +
    983D  GLU      3.2     3.4    +      -       -      +
    985D  ARG*     1.3    75.1    -      -       +      +
    987D  GLN*     1.3    53.9    +      -       -      +
    989D  ASP*     3.0    15.4    +      -       -      +
    990D  GLU*     3.2    21.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 987 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    983D  GLU*     3.2    19.9    +      -       -      +
    984D  SER*     3.9    14.9    +      -       -      +
    985D  ARG      2.6     5.3    +      -       -      -
    986D  ALA*     1.3    70.7    -      -       -      +
    988D  LYS*     1.3    60.9    +      -       -      +
    989D  ASP      3.0     0.7    -      -       -      -
    990D  GLU*     2.8    47.6    +      -       -      +
    991D  GLU*     3.2     6.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 988 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    984D  SER*     3.2    25.6    +      -       -      +
    985D  ARG*     2.6    16.7    +      -       -      +
    987D  GLN*     1.3    75.3    +      -       +      +
    989D  ASP*     1.3    58.4    +      -       -      +
    991D  GLU*     3.3    10.8    -      -       -      +
    992D  LYS*     3.0    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 989 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    702C  ALA*     5.0     0.2    -      -       -      -
    705C  ASP*     3.4    14.6    -      -       -      +
    706C  GLU*     3.3    27.8    -      -       +      +
    708C  LYS*     3.2    23.8    -      -       -      +
    709C  MET*     5.8     0.7    -      -       -      -
    985D  ARG*     2.8    30.8    -      -       -      +
    986D  ALA*     3.0    22.0    +      -       -      +
    988D  LYS*     1.3    79.3    -      -       -      +
    990D  GLU*     1.3    64.7    +      -       -      +
    992D  LYS*     3.4    16.4    -      -       +      +
    993D  MET      3.2    10.2    +      -       -      -
----------------------------------------------------------
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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