Contacts of the helix formed by residues 1020 - 1048 (chain B) in PDB entry 3U5N


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 ILE1020 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    958B  LEU*     3.3     7.0    -      -       -      +
   1018B  TYR*     3.4     2.6    -      -       -      +
   1019B  GLN*     1.3    88.8    -      -       +      +
   1021B  PRO*     1.3    70.3    -      -       +      +
   1022B  ASP*     2.8    40.2    -      -       +      +
   1023B  ASP*     2.8    39.2    +      -       -      +
   1024B  PHE      3.7     1.7    +      -       -      -
   1084B  ARG*     4.9     4.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO1021 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    958B  LEU*     3.2    11.9    -      -       +      -
    962B  ASP*     3.5    31.0    -      -       -      +
    966B  CYS*     4.1    12.1    -      -       -      -
   1020B  ILE*     1.3    93.4    -      -       +      +
   1022B  ASP*     1.3    65.8    +      -       -      +
   1024B  PHE*     3.1     5.1    +      -       +      +
   1025B  VAL*     3.0    26.9    +      -       +      +
   1081B  TYR*     3.5    28.0    -      -       +      +
   1084B  ARG*     3.8    17.5    -      -       -      +
   1086B  PHE*     4.0     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP1022 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1020B  ILE*     2.8    19.4    -      -       +      +
   1021B  PRO*     1.3    77.0    -      -       -      +
   1023B  ASP*     1.3    61.6    +      -       -      +
   1025B  VAL*     3.5     2.1    +      -       -      +
   1026B  ALA*     3.0    28.9    +      -       -      +
   1084B  ARG*     2.5    48.7    +      -       -      -
   1086B  PHE*     3.7    19.1    -      -       +      +
   1087B  ALA      5.1     9.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1023 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1018B  TYR*     3.6    21.3    -      -       +      -
   1019B  GLN*     3.7    10.7    +      -       -      +
   1020B  ILE*     2.8    37.1    +      -       -      +
   1022B  ASP*     1.3    80.3    -      -       -      +
   1024B  PHE*     1.3    61.5    +      -       -      +
   1026B  ALA*     3.6     6.3    +      -       -      +
   1027B  ASP*     3.1    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1024 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    958B  LEU*     5.4     0.7    -      -       +      -
    966B  CYS*     3.3    53.6    -      -       +      -
    969B  LEU*     3.9    30.1    -      -       +      -
    970B  LEU*     4.1    10.3    -      -       +      -
    973B  LEU*     6.1     0.2    -      -       +      -
   1006B  VAL*     3.5    31.4    -      -       +      -
   1010B  LEU*     4.0    11.4    -      -       +      -
   1018B  TYR*     3.8    28.2    -      +       +      -
   1020B  ILE      3.7     1.6    +      -       -      -
   1021B  PRO*     3.1    10.4    +      -       +      +
   1023B  ASP*     1.3    75.3    -      -       -      +
   1025B  VAL*     1.3    76.8    +      -       +      +
   1027B  ASP*     3.2     3.5    +      -       -      +
   1028B  VAL*     3.0    41.7    +      -       +      +
   1073B  PHE*     4.4     5.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with VAL1025 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    969B  LEU*     5.3     1.3    -      -       +      -
   1021B  PRO*     3.0    20.6    +      -       +      +
   1022B  ASP      3.8     4.3    -      -       -      +
   1024B  PHE*     1.3    87.4    -      -       +      +
   1026B  ALA*     1.3    57.5    +      -       -      +
   1028B  VAL*     3.3     2.4    +      -       -      +
   1029B  ARG*     3.0    61.0    +      -       +      +
   1073B  PHE*     4.5     7.9    -      -       +      -
   1077B  LEU*     3.9    30.7    -      -       +      -
   1081B  TYR*     5.5     1.3    -      -       +      -
   1086B  PHE*     3.9    31.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1026 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1022B  ASP      3.0    17.4    +      -       -      +
   1023B  ASP*     4.0     6.5    -      -       -      +
   1024B  PHE      3.3     0.2    -      -       -      -
   1025B  VAL*     1.3    77.2    -      -       -      +
   1027B  ASP*     1.3    60.3    +      -       -      +
   1029B  ARG*     3.7     7.9    +      -       -      +
   1030B  LEU*     3.1    27.9    +      -       -      +
   1033B  LYS*     5.0     3.0    -      -       -      +
   1087B  ALA      5.5     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1027 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    999B  LYS*     4.3     6.2    +      -       -      -
   1001B  MET*     3.3    36.1    -      -       -      +
   1006B  VAL*     4.0     7.2    -      -       +      -
   1009B  LYS*     2.8    28.8    +      -       -      -
   1018B  TYR*     2.8    30.6    +      -       -      +
   1023B  ASP      3.1    16.5    +      -       -      +
   1024B  PHE      3.2     3.1    +      -       -      +
   1026B  ALA*     1.3    77.2    -      -       -      +
   1028B  VAL*     1.3    62.1    +      -       -      +
   1030B  LEU*     3.3    18.1    +      -       -      +
   1031B  ILE*     3.3    10.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1028 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    970B  LEU*     5.3     2.9    -      -       +      -
    973B  LEU*     3.7    20.0    -      -       +      -
   1003B  LEU*     5.4     0.2    -      -       +      -
   1006B  VAL*     4.4    11.0    -      -       +      -
   1024B  PHE*     3.0    49.9    +      -       +      +
   1025B  VAL      3.3     4.5    +      -       -      +
   1027B  ASP*     1.3    76.8    -      -       -      +
   1029B  ARG*     1.3    62.2    +      -       -      +
   1031B  ILE*     3.2    20.6    +      -       +      +
   1032B  PHE*     3.2    19.8    -      -       +      -
   1073B  PHE*     3.5    38.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG1029 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1025B  VAL*     3.0    34.4    +      -       -      +
   1026B  ALA*     4.1     5.6    -      -       -      +
   1028B  VAL*     1.3    75.0    -      -       -      +
   1030B  LEU*     1.3    57.7    +      -       -      +
   1032B  PHE*     3.1     9.8    +      -       -      +
   1033B  LYS*     2.9    54.0    +      -       +      +
   1073B  PHE*     4.2     7.8    -      -       +      -
   1074B  GLU*     2.8    41.7    +      -       -      +
   1077B  LEU*     3.4    16.6    -      -       -      +
   1086B  PHE*     2.8    39.8    +      -       -      +
   1087B  ALA*     4.5     5.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1030 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    999B  LYS*     3.3    55.2    -      -       +      +
   1001B  MET*     3.6    20.9    -      -       +      -
   1026B  ALA      3.1    18.4    +      -       -      +
   1027B  ASP*     3.4    16.2    -      -       -      +
   1029B  ARG*     1.3    72.5    -      -       -      +
   1031B  ILE*     1.3    67.7    +      -       -      +
   1033B  LYS*     4.0    17.0    -      -       +      +
   1034B  ASN*     2.9    46.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1031 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    982B  PHE*     3.9    23.2    -      -       +      +
   1001B  MET*     3.6    31.9    -      -       +      +
   1002B  ASP      3.6    17.5    -      -       -      +
   1003B  LEU*     3.4    31.9    -      -       +      +
   1006B  VAL*     4.2     7.6    -      -       +      -
   1027B  ASP      3.3    13.0    +      -       -      +
   1028B  VAL*     3.2    14.3    +      -       -      +
   1030B  LEU*     1.3    80.8    -      -       -      +
   1032B  PHE*     1.3    80.9    +      -       +      +
   1034B  ASN*     3.5     6.2    +      -       -      +
   1035B  CYS*     3.2    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1032 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    973B  LEU*     4.5     8.7    -      -       +      -
    982B  PHE*     4.0    22.7    -      +       +      -
   1003B  LEU*     5.3     2.5    -      -       +      -
   1028B  VAL*     3.2    41.7    -      -       +      -
   1029B  ARG*     3.1     8.4    +      -       -      +
   1031B  ILE*     1.3    97.6    -      -       +      +
   1033B  LYS*     1.3    63.7    +      -       -      +
   1035B  CYS*     3.4     5.1    +      -       +      +
   1036B  GLU*     3.2    24.6    +      -       -      +
   1066B  GLY*     3.6    23.0    -      -       -      +
   1069B  VAL*     3.5    36.6    -      -       +      -
   1070B  ALA*     3.6    34.1    -      -       +      -
   1073B  PHE*     4.9     3.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with LYS1033 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1026B  ALA*     5.0     2.7    -      -       -      +
   1029B  ARG*     2.9    51.3    +      -       +      +
   1030B  LEU*     3.7    17.9    -      -       +      +
   1032B  PHE*     1.3    74.4    -      -       -      +
   1034B  ASN*     1.3    61.8    +      -       -      +
   1036B  GLU*     3.3     5.7    +      -       -      +
   1037B  ARG*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1034 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    993B  TYR*     3.9    17.7    +      -       -      +
    997B  ILE*     3.4    33.4    -      -       +      +
    999B  LYS*     2.8    26.5    +      -       -      +
   1000B  PRO*     3.7     7.7    -      -       -      +
   1001B  MET*     3.8     6.6    +      -       -      +
   1030B  LEU*     2.9    36.1    +      -       -      +
   1031B  ILE*     3.6     6.4    -      -       -      +
   1033B  LYS*     1.3    75.2    -      -       -      +
   1035B  CYS*     1.3    65.0    +      -       -      +
   1037B  ARG*     4.4     1.2    -      -       -      +
   1038B  PHE*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS1035 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    982B  PHE*     3.6    24.9    -      -       +      -
    993B  TYR*     5.6     1.8    -      -       -      -
   1031B  ILE      3.2    11.3    +      -       -      +
   1032B  PHE*     3.5    11.7    -      -       -      +
   1033B  LYS      3.2     0.4    -      -       -      -
   1034B  ASN*     1.3    80.8    -      -       -      +
   1036B  GLU*     1.3    59.8    +      -       -      +
   1038B  PHE*     3.4     3.8    +      -       -      +
   1039B  ASN*     3.1    29.5    +      -       -      +
   1062B  VAL*     3.5    35.9    -      -       -      -
   1063B  ALA*     3.9    13.2    -      -       -      -
   1066B  GLY*     4.2     6.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU1036 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1032B  PHE      3.2    14.7    +      -       -      +
   1033B  LYS*     3.8     5.6    -      -       -      +
   1035B  CYS*     1.3    82.7    -      -       -      +
   1037B  ARG*     1.3    59.6    +      -       -      +
   1039B  ASN*     3.5    15.9    +      -       -      +
   1040B  GLU*     2.9    31.1    +      -       +      +
   1059B  ASP*     4.9     2.1    -      -       -      +
   1063B  ALA*     4.0    15.7    -      -       -      +
   1066B  GLY      5.3     0.7    -      -       -      -
   1067B  LYS*     3.4    36.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG1037 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    996B  ILE*     4.4    12.4    +      -       +      +
    997B  ILE*     4.0    17.5    -      -       +      -
   1033B  LYS      2.9    18.1    +      -       -      +
   1034B  ASN*     3.8     4.9    -      -       -      +
   1036B  GLU*     1.3    75.3    -      -       -      +
   1038B  PHE*     1.3    60.2    +      -       -      +
   1040B  GLU*     2.7    37.5    +      -       -      +
   1041B  MET*     2.9    49.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1038 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    990B  ILE*     3.9    27.1    -      -       +      -
    991B  PRO*     4.2     3.8    -      -       +      -
    993B  TYR*     3.4    45.1    -      +       +      -
    996B  ILE*     3.6    30.1    -      -       +      -
    997B  ILE*     4.2     3.1    -      -       +      +
   1034B  ASN      3.0    18.3    +      -       -      +
   1035B  CYS*     3.9     3.8    -      -       -      +
   1037B  ARG*     1.3    73.5    -      -       -      +
   1039B  ASN*     1.3    69.7    +      -       -      +
   1041B  MET*     3.2     1.4    +      -       -      -
   1042B  MET*     2.9    65.3    +      -       +      +
   1062B  VAL*     6.3     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN1039 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1035B  CYS      3.1    16.9    +      -       -      +
   1036B  GLU*     3.8    12.3    +      -       -      +
   1038B  PHE*     1.3    80.3    -      -       -      +
   1040B  GLU*     1.3    63.4    +      -       -      +
   1042B  MET*     3.1     9.4    +      -       -      +
   1043B  LYS*     3.1    31.5    +      -       -      +
   1058B  ALA      4.7     1.4    -      -       -      +
   1059B  ASP*     2.5    31.9    +      -       -      +
   1060B  SER*     3.0    32.6    +      -       -      +
   1063B  ALA*     3.4    20.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1040 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1036B  GLU      2.9    19.9    +      -       -      +
   1037B  ARG*     2.7    46.7    +      -       -      +
   1039B  ASN*     1.3    81.0    -      -       -      +
   1041B  MET*     1.3    73.2    +      -       +      +
   1043B  LYS*     3.4    12.1    +      -       -      +
   1044B  VAL*     3.3    22.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET1041 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    996B  ILE*     4.2    30.1    -      -       +      -
   1037B  ARG*     2.9    43.4    +      -       -      +
   1038B  PHE      3.2     3.3    +      -       -      +
   1040B  GLU*     1.3   107.2    -      -       +      +
   1042B  MET*     1.3    61.0    +      -       -      +
   1044B  VAL*     3.2    27.4    +      -       +      +
   1045B  VAL*     3.0    33.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET1042 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    991B  PRO      4.2     9.6    -      -       -      +
    992B  ASN*     4.5     8.5    -      -       +      +
    996B  ILE*     3.6    18.4    -      -       +      -
   1038B  PHE*     2.9    62.2    +      -       +      +
   1039B  ASN*     3.1     8.7    +      -       -      +
   1041B  MET*     1.3    78.5    -      -       -      +
   1043B  LYS*     1.3    61.7    +      -       +      +
   1045B  VAL*     3.2    32.2    +      -       +      +
   1046B  GLN*     3.2    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS1043 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1039B  ASN*     3.1    20.7    +      -       -      +
   1040B  GLU*     3.7    11.7    -      -       -      +
   1041B  MET      3.2     0.2    -      -       -      -
   1042B  MET*     1.3    73.9    -      -       +      +
   1044B  VAL*     1.3    67.0    +      -       +      +
   1046B  GLN*     3.2    29.4    +      -       -      +
   1047B  VAL*     3.4    11.1    +      -       -      +
   1058B  ALA*     3.2    40.4    -      -       -      +
   1059B  ASP*     3.8    20.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1044 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1040B  GLU*     3.3    16.1    +      -       +      +
   1041B  MET*     3.2    32.4    +      -       +      +
   1043B  LYS*     1.3    76.5    -      -       -      +
   1045B  VAL*     1.3    64.0    +      -       +      +
   1047B  VAL*     3.1    28.1    -      -       +      +
   1048B  TYR*     3.3    25.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1045 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    992B  ASN*     5.6     5.4    -      -       -      +
    996B  ILE*     5.9     1.6    -      -       +      -
   1041B  MET*     3.0    21.6    +      -       +      +
   1042B  MET*     3.2    30.9    +      -       +      +
   1044B  VAL*     1.3    77.6    -      -       +      +
   1046B  GLN*     1.3    66.5    +      -       +      +
   1047B  VAL      3.4     0.3    +      -       -      -
   1048B  TYR*     3.5    15.6    +      -       -      +
   1049B  ALA*     3.9    10.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN1046 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1042B  MET*     3.2    22.5    +      -       -      +
   1043B  LYS*     3.2    23.3    +      -       -      +
   1044B  VAL      3.2     0.8    -      -       -      -
   1045B  VAL*     1.3    83.8    -      -       +      +
   1047B  VAL*     1.3    56.3    +      -       -      +
   1049B  ALA*     3.0    33.5    +      -       -      +
   1058B  ALA      5.3     3.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1047 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1043B  LYS      3.4     6.7    +      -       -      +
   1044B  VAL*     3.1    26.0    +      -       +      +
   1046B  GLN*     1.3    78.4    -      -       -      +
   1048B  TYR*     1.3    76.8    +      -       +      +
   1049B  ALA      3.3     2.3    +      -       -      -
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Residues in contact with TYR1048 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1044B  VAL*     3.3    43.7    -      -       +      +
   1045B  VAL*     3.5     8.7    +      -       -      +
   1046B  GLN      3.2     0.8    -      -       -      -
   1047B  VAL*     1.3    87.4    -      -       +      +
   1049B  ALA*     1.3    59.1    +      -       -      +
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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