Contacts of the helix formed by residues 101 - 128 (chain B) in PDB entry 2YW7


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 THR 101 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  VAL*     4.4     6.9    -      -       -      +
     44B  GLY*     5.5     1.8    -      -       -      -
     45B  PRO*     5.6     9.9    -      -       +      -
    100B  ASP*     1.3    87.8    +      -       -      +
    102B  VAL*     1.3    72.4    +      -       +      +
    103B  GLN*     4.0    22.7    -      -       +      +
    104B  ALA*     2.9    23.4    +      -       -      +
    105B  HIS*     3.1     9.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 102 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  VAL*     3.8    12.6    -      -       +      -
     43B  VAL      3.8     5.4    +      -       -      +
     44B  GLY*     5.4     1.3    -      -       -      -
     45B  PRO*     6.0     1.5    -      -       +      +
     46B  ASN*     3.5    15.9    -      -       +      +
     47B  PHE*     3.4    36.6    -      -       +      +
     50B  VAL*     3.6    26.6    -      -       +      +
    100B  ASP      3.7     2.2    +      -       -      -
    101B  THR*     1.3    73.0    -      -       +      +
    103B  GLN*     1.3    68.8    +      -       +      +
    105B  HIS*     2.9     7.7    +      -       -      +
    106B  LEU*     2.9    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  THR*     3.1    16.2    -      -       +      +
    102B  VAL*     1.3    82.2    -      -       +      +
    104B  ALA*     1.3    54.8    +      -       -      +
    105B  HIS      2.7    11.8    +      -       -      -
    106B  LEU*     4.5     6.3    -      -       +      +
    107B  ALA*     2.9    28.9    +      -       +      +
    155B  HIS*     5.9    14.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97B  VAL*     4.2     8.2    -      -       +      +
    100B  ASP*     3.1    36.8    -      -       +      +
    101B  THR*     2.9    19.6    +      -       -      +
    103B  GLN*     1.3    79.0    -      -       -      +
    105B  HIS*     1.3    55.7    +      -       -      +
    107B  ALA*     4.6     3.3    -      -       -      +
    108B  ALA*     3.5    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  VAL*     4.0    13.3    -      -       +      +
     41B  ASN*     2.9    29.3    +      -       +      -
     42B  VAL*     3.5    25.6    -      -       +      -
     50B  VAL*     6.1     2.0    -      -       +      -
     95B  TYR*     2.7    29.6    +      +       -      +
     97B  VAL*     3.4    13.9    -      -       +      +
     98B  GLU      2.7    25.2    +      -       -      -
    100B  ASP*     3.3    15.3    +      -       +      +
    101B  THR      3.1    19.2    +      -       -      -
    102B  VAL      2.9     6.5    +      -       -      +
    103B  GLN      2.7     5.3    +      -       -      -
    104B  ALA*     1.3    72.3    -      -       -      +
    106B  LEU*     1.3    57.9    +      -       +      +
    107B  ALA      3.1     1.1    -      -       -      -
    108B  ALA*     2.8     2.8    +      -       -      +
    109B  LEU*     2.5    38.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  VAL*     3.9    21.5    -      -       +      -
     53B  MET*     4.0    26.2    -      -       +      -
     54B  ILE*     6.1     0.4    -      -       +      -
    102B  VAL*     2.9    40.1    +      -       +      +
    103B  GLN*     4.0     4.7    -      -       -      +
    105B  HIS*     1.3    72.3    -      -       +      +
    107B  ALA*     1.3    54.8    +      -       -      +
    109B  LEU*     3.5    13.9    -      -       +      +
    110B  ASP*     2.6    37.6    +      -       -      +
    152B  VAL*     3.5    25.1    -      -       +      +
    154B  ALA*     4.8     9.9    -      -       +      +
    155B  HIS      4.3    18.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103B  GLN*     2.9    17.9    +      -       +      +
    104B  ALA*     4.6     4.0    -      -       -      +
    106B  LEU*     1.3    77.7    -      -       -      +
    108B  ALA*     1.3    60.9    +      -       -      +
    110B  ASP*     3.4     9.5    -      -       -      +
    111B  LEU*     3.4    26.8    +      -       +      +
    155B  HIS      5.4     3.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  TYR*     3.6    11.4    -      -       +      +
     97B  VAL*     3.6    26.2    -      -       +      -
    104B  ALA      3.5    15.3    +      -       -      +
    105B  HIS      2.8    12.7    +      -       -      +
    107B  ALA*     1.3    73.0    -      -       -      +
    109B  LEU*     1.3    59.6    +      -       -      +
    111B  LEU*     3.0    28.9    +      -       -      +
    112B  VAL*     3.1    13.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  LEU*     5.7     0.2    -      -       +      -
     34B  THR*     4.7     9.2    -      -       +      -
     35B  LEU*     4.0    31.9    -      -       +      -
     38B  VAL*     4.3    19.5    -      -       +      -
     54B  ILE*     4.5    15.7    -      -       +      -
     95B  TYR*     4.0    11.4    -      -       +      +
    105B  HIS*     2.5    19.9    +      -       +      +
    106B  LEU*     3.5    15.5    -      -       +      +
    108B  ALA*     1.3    69.7    -      -       -      +
    110B  ASP*     1.3    64.8    +      -       -      +
    112B  VAL*     2.9    28.1    +      -       +      +
    113B  TYR*     3.0    24.9    +      -       +      -
    148B  PHE*     4.3    14.6    -      -       +      -
    152B  VAL*     4.5     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106B  LEU      2.6    21.6    +      -       -      +
    107B  ALA*     3.4    12.4    -      -       -      +
    109B  LEU*     1.3    72.7    -      -       -      +
    111B  LEU*     1.3    70.2    +      -       -      +
    113B  TYR*     3.4     3.3    +      -       -      +
    114B  ASN*     3.2    12.0    +      -       -      -
    149B  GLN*     3.0    33.2    +      -       -      +
    152B  VAL*     3.5    19.2    -      -       +      +
    153B  ARG*     3.2    36.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107B  ALA*     3.5    17.3    -      -       +      +
    108B  ALA*     3.0    16.4    +      -       -      +
    110B  ASP*     1.3    86.8    -      -       -      +
    112B  VAL*     1.3    61.9    +      -       -      +
    114B  ASN*     3.4    25.1    -      -       +      +
    115B  GLY*     3.7     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 112 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  LEU*     3.7    30.5    -      -       +      -
     34B  THR*     5.1     7.2    -      -       +      -
     92B  TRP*     6.2     4.3    -      -       +      -
     95B  TYR*     4.2    29.4    -      -       +      +
    108B  ALA      3.1     7.8    +      -       -      +
    109B  LEU*     2.9    19.1    +      -       +      +
    111B  LEU*     1.3    74.8    -      -       -      +
    113B  TYR*     1.3    69.6    +      -       +      +
    114B  ASN      3.2     0.7    +      -       -      -
    115B  GLY*     3.2    12.5    +      -       -      -
    116B  VAL*     3.4    16.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  LEU*     3.4    34.5    -      -       +      +
     35B  LEU*     3.6     7.7    -      -       +      +
     57B  GLN*     2.4    44.7    +      -       -      +
     61B  VAL*     3.8     0.2    -      -       -      +
    109B  LEU*     3.0    25.3    +      -       +      +
    110B  ASP*     3.8     8.1    -      -       -      +
    112B  VAL*     1.3    80.5    -      -       +      +
    114B  ASN*     1.3    63.0    +      -       -      +
    116B  VAL*     3.2     9.2    +      -       +      +
    117B  ILE*     2.8    33.5    +      -       +      +
    145B  LEU*     3.7    36.8    -      -       +      -
    148B  PHE*     3.4    23.6    -      +       -      -
    149B  GLN*     3.7    22.4    -      -       +      +
    152B  VAL*     5.5     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110B  ASP*     3.2    18.2    +      -       -      -
    111B  LEU*     3.4    21.2    -      -       +      +
    112B  VAL      3.1     0.2    -      -       -      -
    113B  TYR*     1.3    76.1    -      -       -      +
    115B  GLY*     1.3    58.4    +      -       -      +
    116B  VAL      2.9     1.2    +      -       -      -
    117B  ILE*     3.3     3.0    +      -       -      +
    118B  GLU*     2.9    33.7    +      -       -      +
    149B  GLN*     3.1    30.5    +      -       -      +
    153B  ARG*     3.7    15.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  TRP*     5.5     5.0    -      -       -      -
    111B  LEU      3.7     4.2    +      -       -      -
    112B  VAL      3.2     7.0    +      -       -      -
    114B  ASN*     1.3    76.4    -      -       -      +
    116B  VAL*     1.3    61.4    +      -       -      +
    118B  GLU*     3.9    18.6    -      -       -      -
    119B  ASP*     3.4    25.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  THR*     3.7    32.7    -      -       +      +
     28B  TYR*     5.3     2.7    -      -       +      -
     31B  LEU*     4.4    16.2    -      -       +      -
     92B  TRP*     6.2     4.0    -      -       +      -
    112B  VAL*     3.4    25.8    -      -       +      +
    113B  TYR*     3.2    12.5    +      -       +      +
    114B  ASN      3.0     0.6    -      -       -      -
    115B  GLY*     1.3    80.9    -      -       -      +
    117B  ILE*     1.3    57.7    +      -       +      +
    118B  GLU      3.1     0.9    -      -       -      -
    119B  ASP*     3.2     3.7    +      -       -      +
    120B  THR*     2.7    47.6    +      -       -      +
    145B  LEU*     4.6    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113B  TYR*     2.8    22.2    -      -       +      +
    114B  ASN*     3.8     2.9    -      -       -      +
    116B  VAL*     1.3    74.7    -      -       +      +
    118B  GLU*     1.3    53.5    +      -       -      +
    120B  THR*     3.5     7.4    -      -       -      -
    121B  ARG*     2.6    42.6    +      -       +      +
    142B  ALA*     6.0     2.5    -      -       +      -
    145B  LEU*     4.3     8.3    -      -       +      +
    146B  GLU*     3.1    63.3    -      -       +      +
    149B  GLN*     3.1    35.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  ASN*     2.9    20.2    +      -       -      +
    115B  GLY*     3.9    13.4    +      -       -      -
    117B  ILE*     1.3    77.7    -      -       -      +
    119B  ASP*     1.3    67.8    +      -       -      +
    121B  ARG*     3.7     6.4    -      -       -      +
    122B  LYS*     3.2    50.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  GLN*     4.8     7.0    -      -       -      +
     27B  THR*     5.0     7.0    +      -       +      +
     91B  THR*     4.8    10.4    -      -       -      +
     92B  TRP*     4.4    18.9    -      -       -      -
    115B  GLY      3.4    16.8    -      -       -      +
    116B  VAL*     3.2     8.2    +      -       -      +
    118B  GLU*     1.3    89.1    -      -       -      +
    120B  THR*     1.3    59.6    +      -       -      +
    122B  LYS*     3.0    19.4    +      -       -      +
    123B  SER*     2.8    33.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  GLN*     2.8    33.6    +      -       -      +
     27B  THR*     5.3     0.3    -      -       -      +
     28B  TYR*     4.8     2.5    -      -       -      +
    116B  VAL*     2.7    36.1    +      -       -      +
    117B  ILE*     3.5     8.5    -      -       -      -
    119B  ASP*     1.3    71.7    -      -       -      +
    121B  ARG*     1.3    61.2    +      -       -      +
    123B  SER*     3.6     3.8    +      -       -      -
    124B  ILE*     3.1    24.0    +      -       -      +
    138B  LEU*     3.9    25.3    -      -       +      +
    142B  ALA*     3.9    21.3    -      -       +      +
    145B  LEU*     4.5     7.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  ILE*     2.6    23.7    +      -       +      +
    118B  GLU*     3.7     6.7    -      -       -      +
    120B  THR*     1.3    71.2    -      -       -      +
    122B  LYS*     1.3    65.6    +      -       -      +
    124B  ILE*     3.4    16.8    +      -       +      +
    125B  GLU*     3.2    45.0    +      -       -      +
    142B  ALA*     5.9     1.6    -      -       +      -
    146B  GLU*     4.1    18.0    +      -       -      +
     13D  LYS*     6.4     1.3    -      -       -      -
     71D  ARG*     4.4     2.8    -      -       -      +
    130D  LEU      4.8     3.8    +      -       -      -
    131D  ASP*     2.6    46.7    +      -       -      +
    132D  LEU*     3.2    27.5    -      -       -      +
    133D  VAL*     3.4    23.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  GLU*     3.2    43.0    +      -       -      +
    119B  ASP*     3.0    20.2    +      -       -      +
    121B  ARG*     1.3    74.6    -      -       -      +
    123B  SER*     1.3    52.3    +      -       -      +
    125B  GLU*     3.1    15.4    +      -       -      +
    126B  LYS*     2.7    45.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  LEU*     4.1    30.3    +      -       -      +
     24B  GLN*     4.2     7.7    +      -       -      -
    119B  ASP*     2.8    18.4    +      -       -      +
    120B  THR*     3.9     7.6    -      -       -      -
    122B  LYS*     1.3    72.5    -      -       -      +
    124B  ILE*     1.3    64.0    +      -       -      +
    126B  LYS*     3.4    11.6    +      -       -      +
    127B  LEU*     3.1    28.0    +      -       -      +
    138B  LEU*     4.1    19.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 124 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120B  THR      3.1    17.1    +      -       -      +
    121B  ARG*     3.7    17.7    -      -       -      +
    122B  LYS      3.2     0.4    -      -       -      -
    123B  SER*     1.3    74.4    -      -       -      +
    125B  GLU*     1.3    55.2    +      -       -      +
    127B  LEU*     2.7    19.7    +      -       -      -
    135B  GLN*     2.6    38.5    +      -       -      +
    138B  LEU*     3.5    35.7    -      -       +      +
    139B  ILE*     3.8    18.8    -      -       +      -
    142B  ALA*     3.7    18.4    -      -       +      -
    132D  LEU*     3.5    31.4    -      -       +      -
    133D  VAL*     4.4    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 125 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  ARG*     3.2    36.9    +      -       -      +
    122B  LYS*     3.1    13.0    +      -       -      +
    124B  ILE*     1.3    79.3    -      -       +      +
    126B  LYS*     1.3    59.3    +      -       -      +
    127B  LEU      3.0     5.4    +      -       -      -
    128B  GLU*     3.3    18.1    +      -       -      +
    129B  ASP*     4.8     1.2    +      -       -      +
     13D  LYS*     5.2    12.3    +      -       -      +
    129D  ASP*     5.5     6.7    -      -       -      +
    132D  LEU*     5.3     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 126 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  LEU*     3.3    38.7    -      -       +      +
     23B  LYS*     5.0     6.2    -      -       -      +
    122B  LYS*     2.7    30.2    +      -       +      +
    123B  SER*     3.4     9.6    -      -       -      +
    125B  GLU*     1.3    72.3    -      -       -      +
    127B  LEU*     1.3    58.9    +      -       -      +
    129B  ASP*     4.7     3.3    +      -       -      +
    130B  LEU*     3.2    28.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 127 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  VAL*     4.0    20.9    -      -       +      -
     20B  LEU*     3.8    25.6    -      -       +      -
     21B  LEU*     4.9     4.3    -      -       +      -
    123B  SER      3.1    18.3    +      -       -      +
    124B  ILE*     2.7    14.1    +      -       -      +
    126B  LYS*     1.3    70.6    -      -       -      +
    128B  GLU*     1.3    56.5    +      -       -      +
    129B  ASP      2.8    12.6    +      -       -      -
    130B  LEU*     2.9    33.7    +      -       +      +
    131B  ASP*     3.2    25.9    +      -       +      +
    132B  LEU*     4.3     1.2    +      -       -      +
    134B  SER*     4.3     7.9    -      -       -      -
    135B  GLN*     3.2    31.0    +      -       +      +
    138B  LEU*     4.2    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 128 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128A  GLU*     4.8     9.9    -      -       -      +
    124B  ILE      3.3     1.0    +      -       -      +
    125B  GLU*     3.3    13.0    +      -       -      +
    127B  LEU*     1.3    76.1    -      -       -      +
    129B  ASP*     1.3    68.0    +      -       -      +
    132B  LEU*     3.4    25.9    -      -       -      +
    135B  GLN*     2.9    29.5    -      -       -      +
    128D  GLU*     3.3    24.8    -      -       -      +
    129D  ASP*     6.0     2.0    -      -       -      +
    132D  LEU*     3.8    18.7    -      -       +      +
----------------------------------------------------------
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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
------------------------------------------------------------
  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