Contacts of the helix formed by residues 102 - 127 (chain D) 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 VAL 102 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42D  VAL*     3.5    24.0    -      -       +      -
     43D  VAL      3.8     8.3    +      -       -      +
     45D  PRO*     5.4     6.0    -      -       +      +
     46D  ASN      5.9     0.2    -      -       -      +
     47D  PHE*     4.0    23.8    -      -       -      +
     50D  VAL*     3.6    14.6    -      -       +      -
    101D  THR*     1.3    69.8    -      -       -      +
    103D  GLN*     1.3    73.0    +      -       -      +
    105D  HIS*     3.1     2.3    -      -       -      +
    106D  LEU*     2.6    62.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45D  PRO*     5.0    12.5    -      -       -      +
    101D  THR*     3.5    26.1    -      -       +      +
    102D  VAL*     1.3    82.9    +      -       -      +
    104D  ALA*     1.3    56.0    +      -       +      +
    105D  HIS      2.7     4.2    +      -       -      -
    106D  LEU*     4.6     3.8    -      -       -      -
    107D  ALA*     2.7    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 104 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97D  VAL*     4.1     4.6    -      -       -      +
    100D  ASP*     3.6    24.4    -      -       -      +
    101D  THR*     2.6    32.7    +      -       -      +
    103D  GLN*     1.3    72.5    -      -       +      +
    105D  HIS*     1.3    60.7    +      -       -      +
    107D  ALA*     4.4     6.5    -      -       -      -
    108D  ALA*     5.1     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37D  HIS*     5.4     0.2    -      +       -      -
     38D  VAL*     3.2    42.9    -      -       +      +
     41D  ASN*     3.0    26.4    +      -       +      -
     42D  VAL*     4.2     5.4    -      -       +      -
     95D  TYR*     2.8    30.9    +      +       -      -
     97D  VAL*     3.5    22.4    -      -       +      -
     98D  GLU      2.9    22.0    +      -       -      -
    100D  ASP*     3.6     6.5    -      -       +      -
    101D  THR      2.9    21.3    -      -       -      +
    102D  VAL*     3.1     4.7    -      -       -      +
    103D  GLN      2.7     4.4    +      -       -      -
    104D  ALA*     1.3    69.7    -      -       -      +
    106D  LEU*     1.3    56.7    +      -       -      +
    107D  ALA      3.1     1.8    -      -       -      +
    108D  ALA*     3.6     8.7    -      -       -      +
    109D  LEU*     2.6    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38D  VAL*     5.5     1.7    -      -       +      +
     50D  VAL*     3.9    21.5    -      -       +      -
     53D  MET*     3.5    35.0    -      -       +      -
     54D  ILE*     5.8     0.2    -      -       +      -
    102D  VAL*     2.6    40.4    +      -       +      +
    103D  GLN*     3.8     3.8    -      -       -      +
    105D  HIS*     1.3    72.2    -      -       -      +
    107D  ALA*     1.3    57.1    +      -       -      +
    109D  LEU*     3.2    12.0    +      -       +      +
    110D  ASP      2.9    23.4    +      -       -      -
    152D  VAL*     3.6    35.1    -      -       +      +
    154D  ALA*     4.4    16.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 107 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103D  GLN      2.7    25.5    +      -       -      +
    104D  ALA*     4.4     3.6    -      -       -      -
    105D  HIS      4.3     0.9    -      -       -      +
    106D  LEU*     1.3    72.0    -      -       -      +
    108D  ALA*     1.3    55.2    +      -       -      +
    110D  ASP*     2.7    36.6    +      -       -      +
    111D  LEU*     3.1     7.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 108 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95D  TYR*     3.6    20.0    -      -       +      +
     97D  VAL*     3.6    24.0    -      -       +      -
    104D  ALA*     5.1     1.1    -      -       -      +
    105D  HIS*     3.2     8.0    +      -       -      +
    107D  ALA*     1.3    77.6    -      -       -      +
    109D  LEU*     1.3    59.2    +      -       -      +
    110D  ASP      3.4     0.2    -      -       -      -
    111D  LEU*     3.2    33.9    -      -       +      +
    112D  VAL*     3.3    12.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 109 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31D  LEU*     5.9     1.3    -      -       +      -
     34D  THR*     4.4    10.8    -      -       +      -
     35D  LEU*     3.8    29.6    -      -       +      -
     38D  VAL*     3.8    25.6    -      -       +      -
     53D  MET*     4.8     1.1    -      -       +      -
     54D  ILE*     4.4    16.8    -      -       +      -
     95D  TYR*     3.6    10.1    +      -       +      -
    105D  HIS      2.6    21.0    +      -       -      +
    106D  LEU*     3.3    18.2    -      -       +      +
    108D  ALA*     1.3    72.3    -      -       -      +
    110D  ASP*     1.3    64.6    +      -       -      +
    111D  LEU      3.2     0.2    -      -       -      -
    112D  VAL*     3.2    20.6    +      -       +      +
    113D  TYR*     3.3    24.0    +      -       +      -
    148D  PHE*     4.6    11.7    -      -       +      -
    152D  VAL*     5.0     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 110 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  LEU      2.9    12.0    +      -       -      +
    107D  ALA*     2.7    21.4    +      -       -      +
    109D  LEU*     1.3    70.2    -      -       -      +
    111D  LEU*     1.3    60.6    +      -       -      +
    113D  TYR*     3.2    12.8    +      -       -      +
    114D  ASN*     3.0    16.7    +      -       -      -
    149D  GLN*     3.1     9.8    +      -       -      +
    152D  VAL*     4.2    15.4    -      -       +      +
    153D  ARG*     2.8    48.2    +      -       +      +
    155D  HIS*     5.8     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 111 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  ALA      3.1     8.7    +      -       -      +
    108D  ALA*     3.2    25.8    -      -       +      +
    109D  LEU      3.2     0.2    -      -       -      -
    110D  ASP*     1.3    76.9    -      -       -      +
    112D  VAL*     1.3    63.9    +      -       -      +
    113D  TYR      3.2     0.5    +      -       -      -
    114D  ASN*     3.2    30.1    +      -       +      +
    115D  GLY*     3.6     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 112 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  ASP*     5.8     2.5    -      -       -      +
     31D  LEU*     4.7    12.3    -      -       +      -
     34D  THR*     4.6     9.2    -      -       +      -
     95D  TYR*     3.7    27.6    -      -       +      -
    108D  ALA      3.3    12.5    +      -       -      +
    109D  LEU*     3.2    17.3    +      -       +      +
    111D  LEU*     1.3    76.0    -      -       +      +
    113D  TYR*     1.3    71.7    +      -       +      +
    115D  GLY*     3.2     5.7    +      -       -      -
    116D  VAL*     3.1    36.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 113 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31D  LEU*     3.5    33.7    -      -       +      +
     35D  LEU*     4.2     0.6    -      -       +      +
     57D  GLN*     2.7    28.6    +      -       -      +
    109D  LEU*     3.5    22.4    -      -       +      +
    110D  ASP*     3.2     9.7    +      -       -      +
    111D  LEU      3.2     0.8    -      -       -      -
    112D  VAL*     1.3    82.7    -      -       +      +
    114D  ASN*     1.3    66.8    +      -       -      +
    116D  VAL*     2.8     6.7    +      -       +      +
    117D  ILE*     2.8    31.5    +      -       +      +
    145D  LEU*     3.2    48.6    -      -       +      +
    148D  PHE*     3.1    30.8    -      +       +      -
    149D  GLN*     3.8    26.5    -      -       +      +
    152D  VAL*     5.4     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 114 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110D  ASP*     3.0    28.7    +      -       -      -
    111D  LEU*     3.2    24.8    +      -       +      +
    113D  TYR*     1.3    75.8    -      -       -      +
    115D  GLY*     1.3    57.6    +      -       -      +
    117D  ILE*     4.0     3.5    -      -       -      +
    118D  GLU*     3.0    44.4    +      -       -      +
    149D  GLN*     2.9    20.2    +      -       -      +
    153D  ARG*     3.5     9.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 115 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92D  TRP*     6.5     0.9    -      -       -      -
    111D  LEU      3.6     3.4    +      -       -      -
    112D  VAL      3.2     7.6    +      -       -      -
    113D  TYR      3.1     0.8    -      -       -      -
    114D  ASN*     1.3    80.8    -      -       -      +
    116D  VAL*     1.3    55.8    +      -       -      +
    118D  GLU*     4.0     7.6    -      -       -      +
    119D  ASP*     3.0    36.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 116 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27D  THR*     3.5    32.6    -      -       +      +
     28D  TYR*     4.7     4.9    -      -       +      -
     31D  LEU*     3.9    27.8    -      -       +      -
     92D  TRP*     6.2     2.0    -      -       +      -
    112D  VAL*     3.1    32.3    -      -       +      +
    113D  TYR*     2.8    11.2    +      -       +      +
    115D  GLY*     1.3    77.4    -      -       -      +
    117D  ILE*     1.3    56.6    +      -       +      +
    119D  ASP*     4.0     2.7    -      -       -      +
    120D  THR*     2.7    37.6    +      -       -      +
    145D  LEU*     4.7    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 117 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  TYR*     2.8    24.0    +      -       +      +
    114D  ASN*     4.0     3.1    -      -       -      +
    116D  VAL*     1.3    70.8    -      -       -      +
    118D  GLU*     1.3    57.2    +      -       +      +
    120D  THR*     3.0     7.0    +      -       -      -
    121D  ARG*     2.8    57.5    +      -       +      +
    142D  ALA*     5.7     2.9    -      -       +      +
    145D  LEU*     4.0    18.6    -      -       +      +
    146D  GLU*     3.3    52.3    -      -       +      +
    149D  GLN*     3.1    36.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 118 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114D  ASN*     3.0    29.7    +      -       +      +
    115D  GLY*     4.0     6.1    -      -       -      +
    117D  ILE*     1.3    76.3    -      -       +      +
    119D  ASP*     1.3    62.1    +      -       -      +
    121D  ARG*     3.5    17.5    +      -       -      +
    122D  LYS*     3.1    40.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 119 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23D  LYS*     4.3    16.4    +      -       -      -
     24D  GLN*     4.9     6.3    -      -       -      +
     27D  THR*     4.8     8.6    +      -       +      +
     91D  THR*     3.4    21.9    +      -       -      +
     92D  TRP*     4.1    12.5    -      -       -      -
    115D  GLY      3.0    20.3    +      -       -      +
    116D  VAL*     4.0     5.6    -      -       -      +
    118D  GLU*     1.3    76.2    -      -       -      +
    120D  THR*     1.3    57.0    +      -       -      +
    122D  LYS*     3.2    26.2    +      -       -      +
    123D  SER*     3.0    28.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 120 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24D  GLN*     2.7    36.2    +      -       -      +
     28D  TYR*     4.6     1.8    +      -       -      +
    116D  VAL*     2.7    25.7    +      -       -      +
    117D  ILE*     3.0     7.4    +      -       -      -
    119D  ASP*     1.3    73.5    -      -       -      +
    121D  ARG*     1.3    57.3    +      -       -      +
    122D  LYS      3.0     1.6    -      -       -      -
    123D  SER*     2.8     5.6    +      -       -      +
    124D  ILE*     2.6    56.3    +      -       +      +
    138D  LEU*     4.3     9.9    -      -       +      +
    141D  HIS*     5.6     0.2    -      -       +      -
    142D  ALA*     4.3    16.8    -      -       +      +
    145D  LEU*     5.8     3.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 121 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  ASP*     5.5     5.1    +      -       -      -
     71A  ARG*     5.3     0.6    -      -       -      +
     75A  LEU*     5.2    10.5    -      -       -      +
    133A  VAL*     6.1     2.9    -      -       +      +
    117D  ILE*     2.8    41.5    +      -       +      +
    118D  GLU*     3.7    14.8    -      -       -      +
    120D  THR*     1.3    72.7    -      -       -      +
    122D  LYS*     1.3    56.2    +      -       -      +
    124D  ILE*     3.2    16.1    +      -       +      +
    125D  GLU*     2.9    38.3    +      -       +      +
    142D  ALA*     5.7     1.1    -      -       +      -
    146D  GLU*     3.5    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 122 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118D  GLU*     3.1    31.0    +      -       -      +
    119D  ASP*     3.2    28.0    +      -       -      +
    120D  THR      3.0     0.6    -      -       -      -
    121D  ARG*     1.3    76.6    -      -       +      +
    123D  SER*     1.3    57.6    +      -       -      +
    125D  GLU*     2.9    14.0    +      -       -      +
    126D  LYS*     2.9    51.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 123 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20D  LEU*     3.4    39.6    +      -       -      +
     23D  LYS*     5.8     4.0    -      -       -      +
     24D  GLN*     4.5     8.4    +      -       -      -
    119D  ASP      3.0    10.7    +      -       -      -
    120D  THR*     2.8    12.9    +      -       -      -
    122D  LYS*     1.3    75.7    -      -       -      +
    124D  ILE*     1.3    60.9    +      -       -      +
    126D  LYS*     3.7     8.6    +      -       -      +
    127D  LEU*     3.2    29.8    +      -       -      +
    138D  LEU*     3.8    14.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 124 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  LEU*     3.9    20.9    -      -       +      -
    133A  VAL*     4.9     5.6    -      -       +      -
    120D  THR*     2.6    24.1    +      -       +      +
    121D  ARG*     3.3    17.9    -      -       +      +
    123D  SER*     1.3    70.7    -      -       -      +
    125D  GLU*     1.3    63.7    +      -       -      +
    127D  LEU      3.5     3.3    +      -       -      -
    135D  GLN*     3.1    30.3    +      -       +      +
    138D  LEU*     3.6    22.9    -      -       +      -
    139D  ILE*     3.3    50.9    -      -       +      +
    142D  ALA*     3.8    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 125 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  LEU*     4.7    17.8    -      -       +      +
    121D  ARG*     2.9    21.1    +      -       +      +
    122D  LYS*     2.9    11.1    +      -       -      +
    124D  ILE*     1.3    72.9    -      -       -      +
    126D  LYS*     1.3    54.9    +      -       +      +
    127D  LEU      2.8     5.1    +      -       -      -
    128D  GLU*     2.7    36.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 126 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20D  LEU*     3.9    31.0    -      -       +      +
     23D  LYS*     5.6     8.1    -      -       -      +
    122D  LYS*     2.9    33.1    +      -       -      +
    123D  SER*     3.9    10.8    +      -       -      +
    125D  GLU*     1.3    76.1    -      -       +      +
    127D  LEU*     1.3    59.1    +      -       -      +
    128D  GLU      3.3     1.1    +      -       -      -
    129D  ASP      5.1     1.2    +      -       -      +
    130D  LEU*     3.4    21.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 127 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17D  VAL*     3.8    35.2    -      -       +      -
     20D  LEU*     4.0    17.9    -      -       +      -
     21D  LEU*     4.8     2.7    -      -       +      -
    123D  SER      3.2    22.1    +      -       -      +
    124D  ILE      3.8     6.1    -      -       -      +
    125D  GLU      2.8     1.2    +      -       -      -
    126D  LYS*     1.3    78.7    -      -       -      +
    128D  GLU*     1.3    68.5    +      -       -      +
    129D  ASP      3.5     0.9    -      -       -      -
    130D  LEU*     3.2     6.9    +      -       +      -
    131D  ASP*     3.2    40.9    +      -       +      +
    134D  SER*     3.7    30.5    -      -       -      +
    135D  GLN*     3.5    10.2    +      -       +      -
    138D  LEU*     3.8    15.0    -      -       +      -
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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