Contacts of the helix formed by residues 944 - 969 (chain B) 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 B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678B  ASN*     2.9    35.7    +      -       +      +
    943B  LYS*     1.3    72.7    -      -       -      +
    945B  ARG*     1.3    71.2    +      -       +      +
    946B  ASP*     3.6    26.5    -      -       +      +
    947B  LEU*     2.8    35.3    +      -       +      +
    948B  HIS      3.0     9.7    +      -       -      -
   1064B  HIS*     3.6    18.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 945 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452B  HG9      4.3    16.4    -      -       -      +
    943B  LYS      3.6     1.8    +      -       -      -
    944B  VAL*     1.3    76.0    -      -       +      +
    946B  ASP*     1.3    69.6    +      -       -      +
    948B  HIS*     3.6     1.1    -      -       -      +
    949B  LEU*     3.0    56.3    +      -       +      +
   1064B  HIS*     4.9     1.0    +      -       -      -
   1068B  ASN*     3.5    20.6    +      -       -      +
   1071B  ILE*     3.6    30.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 946 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    944B  VAL*     2.9    27.0    +      -       +      +
    945B  ARG*     1.3    83.2    -      -       -      +
    947B  LEU*     1.3    69.7    +      -       +      +
    949B  LEU*     3.9     5.9    +      -       -      +
    950B  LYS*     3.5    19.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 947 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678B  ASN*     3.8    27.8    -      -       -      +
    679B  PHE      3.7    24.5    -      -       -      +
    680B  PRO*     4.8     9.0    -      -       +      -
    681B  ILE*     4.9     3.4    -      -       +      -
    682B  PHE*     3.9    25.8    -      -       +      +
    943B  LYS*     3.9    22.9    -      -       +      +
    944B  VAL*     2.8    21.2    +      -       +      +
    946B  ASP*     1.3    80.8    -      -       +      +
    948B  HIS*     1.3    65.1    +      -       -      +
    950B  LYS*     3.0    14.9    +      -       -      +
    951B  TRP*     3.2    29.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 948 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462B  666      3.0    16.6    +      -       -      +
    940B  GLY*     3.6    20.3    +      -       -      +
    941B  PRO*     3.6    17.8    -      -       +      +
    944B  VAL      3.0    10.4    +      -       -      +
    945B  ARG      3.6     6.3    -      -       -      +
    947B  LEU*     1.3    78.1    -      -       -      +
    949B  LEU*     1.3    66.4    +      -       +      +
    951B  TRP      3.6     0.2    +      -       -      -
    952B  THR*     2.6    51.8    +      -       -      -
    988B  GLN*     3.6    17.7    -      -       -      -
    992B  ILE*     4.8     0.9    -      -       +      -
   1068B  ASN*     3.2    38.4    -      -       +      +
   1071B  ILE*     4.4     1.8    -      -       +      -
   1072B  TRP*     3.1    28.4    +      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 949 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  HG9      3.9    15.8    -      -       +      +
    452B  HG9      4.5    16.8    -      -       +      -
    945B  ARG*     3.0    51.6    +      -       +      +
    946B  ASP*     4.4     6.1    -      -       -      +
    947B  LEU      3.3     0.2    -      -       -      -
    948B  HIS*     1.3    84.2    -      -       +      +
    950B  LYS*     1.3    60.6    +      -       -      +
    952B  THR*     3.7     4.7    -      -       -      -
    953B  GLU*     2.9    30.4    +      -       -      +
   1071B  ILE*     4.4     8.1    -      -       +      -
   1072B  TRP*     3.7    33.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 950 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682B  PHE*     3.4    48.3    -      -       +      -
    946B  ASP      3.5    13.5    +      -       -      +
    947B  LEU      3.0    10.8    +      -       -      +
    949B  LEU*     1.3    80.6    -      -       -      +
    951B  TRP*     1.3    62.7    +      -       -      +
    953B  GLU*     3.5    31.0    +      -       -      +
    954B  GLY*     3.3    16.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 951 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462B  666      3.6    25.6    -      -       +      +
    681B  ILE*     4.3     5.9    -      -       +      +
    682B  PHE*     3.4    32.7    -      +       -      -
    735B  PRO      5.2     4.0    -      -       -      -
    736B  TYR*     3.5    36.5    -      +       +      -
    738B  ASN*     4.8     3.1    -      -       -      -
    740B  ILE*     3.5    29.6    -      -       +      -
    741B  HIS*     3.6    30.5    -      -       +      -
    744B  ASP*     3.9    34.6    +      -       +      -
    939B  ASN*     4.9     2.4    -      -       -      +
    940B  GLY*     4.5    13.2    -      -       -      -
    943B  LYS*     5.6     0.6    -      -       +      +
    947B  LEU*     3.2    33.2    +      -       +      +
    948B  HIS      4.0     1.3    -      -       -      +
    950B  LYS*     1.3    76.8    -      -       -      +
    952B  THR*     1.3    63.7    +      -       -      +
    954B  GLY*     3.0     3.6    +      -       -      -
    955B  ILE*     3.0    20.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 952 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  HG9      5.1     4.0    -      -       +      -
    462B  666      3.2     8.1    +      -       -      -
    948B  HIS*     2.6    42.8    +      -       -      -
    949B  LEU*     3.7     8.7    -      -       -      -
    951B  TRP*     1.3    75.4    -      -       -      +
    953B  GLU*     1.3    63.5    +      -       -      +
    955B  ILE*     3.1    24.9    -      -       -      +
    956B  VAL*     3.1     9.2    +      -       +      +
    984B  LEU*     3.8    22.2    -      -       +      -
    988B  GLN*     3.3    26.7    -      -       +      +
   1072B  TRP*     4.5     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 953 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  HG9      3.9    30.1    -      -       +      +
    949B  LEU      2.9    18.5    +      -       -      +
    950B  LYS*     3.6    30.7    +      -       -      +
    951B  TRP      3.2     0.2    -      -       -      -
    952B  THR*     1.3    78.4    -      -       -      +
    954B  GLY*     1.3    59.1    +      -       -      +
    956B  VAL*     2.9    26.4    -      -       -      +
    957B  ASN*     3.2    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 954 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    735B  PRO*     3.6    31.3    -      -       -      +
    736B  TYR*     3.6    10.1    -      -       -      +
    950B  LYS      3.3     7.7    +      -       -      -
    951B  TRP*     3.0     8.6    +      -       -      -
    953B  GLU*     1.3    80.3    -      -       -      +
    955B  ILE*     1.3    61.0    +      -       -      +
    957B  ASN*     3.4     2.1    +      -       -      -
    958B  GLU*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 955 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462B  666      4.0    32.5    -      -       +      -
    736B  TYR*     3.7    33.2    -      -       +      -
    737B  HIS*     4.1    14.4    -      -       +      -
    951B  TRP      3.0    13.1    +      -       -      +
    952B  THR*     3.1    25.4    -      -       -      +
    954B  GLY*     1.3    76.3    -      -       -      +
    956B  VAL*     1.3    65.0    +      -       +      +
    958B  GLU*     3.3     3.6    +      -       +      -
    959B  PHE*     3.0    56.0    +      -       +      -
    987B  LEU*     5.1     2.9    -      -       +      -
    988B  GLN*     4.2    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 956 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  HG9      3.9    23.3    -      -       +      -
    952B  THR*     3.1    15.1    +      -       +      +
    953B  GLU*     2.9    30.7    -      -       -      +
    955B  ILE*     1.3    78.6    -      -       +      +
    957B  ASN*     1.3    70.0    +      -       -      +
    959B  PHE*     3.3     7.4    +      -       -      +
    960B  TYR*     3.1    43.1    +      -       +      +
    976B  PHE      6.1     0.2    -      -       -      -
    984B  LEU*     3.6    31.0    -      -       +      -
    987B  LEU*     4.6    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 957 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  HG9      3.1    63.1    +      -       -      +
    735B  PRO*     4.0    17.3    -      -       +      +
    953B  GLU*     3.2    36.8    +      -       -      +
    954B  GLY*     4.0     5.8    -      -       -      +
    955B  ILE      3.4     0.2    -      -       -      -
    956B  VAL*     1.3    83.0    -      -       -      +
    958B  GLU*     1.3    62.2    +      -       -      +
    960B  TYR*     3.2     9.0    +      -       -      +
    961B  GLU*     3.1    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 958 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    734B  ILE*     3.6     9.4    -      -       +      +
    735B  PRO*     3.6    15.0    -      -       +      +
    736B  TYR*     3.0    13.9    +      -       -      -
    737B  HIS*     2.5    57.4    +      -       -      -
    825B  HIS*     4.1     0.2    -      -       -      -
    827B  GLY*     3.3    35.9    -      -       -      +
    828B  ARG*     5.7     1.1    -      -       -      +
    954B  GLY      3.1    16.1    +      -       -      +
    955B  ILE*     3.7     9.6    -      -       +      +
    956B  VAL      3.2     0.2    -      -       -      -
    957B  ASN*     1.3    77.9    -      -       -      +
    959B  PHE*     1.3    65.7    +      -       +      +
    961B  GLU*     3.2     8.8    +      -       -      +
    962B  GLN*     3.1    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 959 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462B  666      3.7    61.7    -      +       +      -
    737B  HIS*     5.8     0.7    -      +       -      -
    829B  THR*     4.8     4.5    -      -       +      -
    955B  ILE*     3.0    43.2    +      -       +      +
    956B  VAL*     3.3     6.5    +      -       -      +
    958B  GLU*     1.3    80.0    -      -       +      +
    960B  TYR*     1.3    57.9    +      -       +      +
    962B  GLN*     3.3     4.6    +      -       -      +
    963B  GLY      2.9    22.9    +      -       -      -
    976B  PHE*     4.2    15.5    -      -       +      +
    977B  MET*     3.3    49.8    -      -       +      +
    987B  LEU*     4.1    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 960 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  HG9      3.9    36.1    +      -       +      +
    956B  VAL*     3.1    34.1    +      -       +      +
    957B  ASN*     3.6     8.3    -      -       -      +
    958B  GLU      3.1     0.2    -      -       -      -
    959B  PHE*     1.3    74.9    -      -       +      +
    961B  GLU*     1.3    66.6    +      -       -      +
    963B  GLY*     3.3     0.5    +      -       -      -
    964B  ASP*     3.0    29.5    +      -       -      +
    976B  PHE      3.9    17.9    -      -       -      -
    977B  MET*     3.7    10.7    -      -       -      +
    978B  ASP      3.9     4.5    -      -       -      -
    979B  ARG*     3.3    69.3    -      -       +      +
    982B  PRO*     3.4    25.8    -      -       +      +
    983B  GLN      5.0     0.7    +      -       -      -
    984B  LEU*     5.3     5.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 961 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  HG9      6.1     0.7    -      -       -      -
    734B  ILE*     5.0     6.9    -      -       -      +
    735B  PRO*     4.1    25.7    -      -       -      +
    828B  ARG*     3.7    23.8    +      -       -      +
    957B  ASN*     3.1    19.7    +      -       -      +
    958B  GLU*     3.2     9.4    +      -       -      +
    960B  TYR*     1.3    75.7    -      -       -      +
    962B  GLN*     1.3    63.0    +      -       -      +
    964B  ASP*     3.4     9.8    +      -       -      +
    965B  GLU*     3.3    16.8    +      -       -      +
    979B  ARG*     4.8     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 962 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    827B  GLY      4.2     2.5    -      -       -      +
    828B  ARG*     3.3    39.5    -      -       +      +
    829B  THR*     2.9    46.0    +      -       -      +
    832B  PHE*     3.6    13.3    -      -       +      +
    958B  GLU      3.1    12.6    +      -       -      +
    959B  PHE*     3.6     9.9    -      -       -      +
    961B  GLU*     1.3    78.0    -      -       -      +
    963B  GLY*     1.3    57.0    +      -       -      +
    965B  GLU*     3.3     4.2    +      -       -      +
    966B  GLU*     3.0    52.1    +      -       +      +
    974B  SER*     3.9     3.0    +      -       -      -
    977B  MET*     3.4    22.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 963 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    959B  PHE      2.9    10.9    +      -       -      -
    960B  TYR      3.3     0.6    +      -       -      -
    962B  GLN*     1.3    74.2    -      -       -      +
    964B  ASP*     1.3    66.5    +      -       -      +
    966B  GLU*     3.3    17.8    +      -       -      +
    967B  ALA*     3.0    24.4    +      -       -      +
    973B  ILE*     4.1    11.0    -      -       -      +
    977B  MET*     3.5    22.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 964 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    960B  TYR      3.0    16.3    +      -       -      +
    961B  GLU*     3.6    10.4    -      -       -      +
    962B  GLN      3.2     0.2    -      -       -      -
    963B  GLY*     1.3    75.2    -      -       -      +
    965B  GLU*     1.3    59.4    +      -       -      +
    967B  ALA*     3.2     6.8    +      -       -      +
    968B  ASN*     2.8    41.5    +      -       -      +
    977B  MET      5.5     0.5    -      -       -      +
    979B  ARG*     2.6    47.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 965 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    828B  ARG*     2.6    48.2    +      -       -      +
    832B  PHE*     3.6    22.2    -      -       +      -
    961B  GLU      3.3     3.2    +      -       -      +
    962B  GLN      3.3     9.2    +      -       -      +
    964B  ASP*     1.3    79.4    -      -       -      +
    966B  GLU*     1.3    56.9    +      -       -      +
    968B  ASN*     3.1     9.3    +      -       +      +
    969B  LEU*     2.9    42.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 966 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    832B  PHE*     3.9    25.3    -      -       +      +
    962B  GLN*     3.0    41.6    +      -       -      +
    963B  GLY*     3.5    14.6    -      -       -      +
    965B  GLU*     1.3    75.3    -      -       -      +
    967B  ALA*     1.3    56.7    +      -       -      +
    969B  LEU*     3.1     7.2    +      -       -      -
    971B  LEU*     2.7    43.9    +      -       +      +
    972B  PRO      4.0    14.7    -      -       -      +
    973B  ILE*     3.3     5.1    -      -       -      -
    974B  SER*     2.4    51.6    +      -       -      -
    977B  MET*     4.5     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 967 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    963B  GLY      3.0    17.2    +      -       -      +
    964B  ASP*     3.6     6.7    -      -       -      +
    966B  GLU*     1.3    73.4    -      -       -      +
    968B  ASN*     1.3    67.4    +      -       -      +
    970B  GLY*     2.9    14.7    +      -       -      -
    971B  LEU      4.0     8.7    +      -       -      -
    973B  ILE*     4.0    20.8    -      -       +      +
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Residues in contact with ASN 968 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    964B  ASP*     2.8    32.0    +      -       -      +
    965B  GLU*     3.1    13.8    +      -       +      +
    967B  ALA*     1.3    79.2    -      -       -      +
    969B  LEU*     1.3    62.4    +      -       +      +
    970B  GLY      3.2     2.8    +      -       -      -
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Residues in contact with LEU 969 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    832B  PHE*     4.4     3.8    -      -       +      -
    836B  THR*     3.9    28.7    -      -       +      -
    965B  GLU*     2.9    40.2    +      -       +      +
    966B  GLU      3.7     4.9    -      -       -      +
    967B  ALA      3.1     0.8    -      -       -      -
    968B  ASN*     1.3    78.7    -      -       +      +
    970B  GLY*     1.3    59.6    +      -       -      +
    971B  LEU*     3.0    21.7    +      -       +      +
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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