Contacts of the helix formed by residues 102 - 128 (chain K) in PDB entry 1VEQ


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 K).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42K  VAL*     3.8    17.7    -      -       +      -
     43K  VAL      3.1    12.0    +      -       -      +
     44K  GLY*     3.9    13.0    -      -       -      -
     45K  PRO*     4.8     1.3    -      -       +      -
     46K  ASN*     3.6    37.2    -      -       -      +
     47K  PHE      4.5     0.2    -      -       -      +
     50K  VAL*     3.2    38.8    -      -       +      -
    101K  THR*     1.3    76.5    -      -       -      +
    103K  GLN*     1.3    73.4    +      -       +      +
    105K  HIS*     3.2     2.1    +      -       -      +
    106K  LEU*     3.1    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 103 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45F  PRO*     4.4    20.5    -      -       -      +
     46K  ASN*     4.7     3.8    +      -       -      +
    101K  THR*     3.5     9.9    -      -       -      +
    102K  VAL*     1.3    90.3    -      -       +      +
    104K  ALA*     1.3    66.9    +      -       -      +
    106K  LEU*     3.5     4.3    +      -       -      +
    107K  ALA*     3.0    24.5    +      -       -      +
    155K  HIS*     4.0    20.9    +      -       -      +
    156K  LEU*     4.1    19.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 104 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97K  VAL*     4.8     6.7    -      -       +      -
    100K  ASP*     3.5    28.9    -      -       +      +
    101K  THR*     2.9    23.9    +      -       -      +
    102K  VAL      3.1     0.2    +      -       -      -
    103K  GLN*     1.3    77.2    -      -       -      +
    105K  HIS*     1.3    66.4    +      -       -      +
    107K  ALA*     3.3     4.9    +      -       -      +
    108K  ALA*     3.0    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 105 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38K  VAL*     4.0    20.3    -      -       +      +
     41K  ASN*     3.2    19.5    +      -       +      -
     42K  VAL*     3.7    22.9    -      -       +      -
     95K  TYR*     2.6    39.5    +      +       -      +
     97K  VAL*     3.0    29.8    -      -       +      +
     98K  GLU      3.1    18.8    +      -       -      -
    100K  ASP*     3.6    11.0    +      -       +      -
    101K  THR      3.3    19.1    -      -       -      -
    102K  VAL      3.2     6.0    +      -       -      +
    104K  ALA*     1.3    78.0    -      -       -      +
    106K  LEU*     1.3    55.3    +      -       +      +
    108K  ALA*     2.9     3.3    +      -       -      -
    109K  LEU*     2.6    37.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 106 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38K  VAL*     6.4     0.7    -      -       +      -
     50K  VAL*     3.9    11.4    -      -       +      -
     53K  MET*     4.1    16.8    -      -       +      -
     54K  ILE*     6.1     1.3    -      -       +      -
    102K  VAL*     3.1    35.2    +      -       +      +
    103K  GLN*     3.9     5.6    -      -       -      +
    105K  HIS*     1.3    78.3    -      -       +      +
    107K  ALA*     1.3    52.0    +      -       -      +
    109K  LEU*     3.3     9.6    +      -       +      -
    110K  ASP*     2.7    31.0    +      -       -      +
    152K  VAL*     3.0    41.6    -      -       +      +
    155K  HIS*     3.5    37.2    -      -       +      -
    156K  LEU*     4.1    12.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 107 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103K  GLN      3.0    19.3    +      -       -      +
    104K  ALA*     3.5     4.5    -      -       -      +
    106K  LEU*     1.3    74.7    -      -       -      +
    108K  ALA*     1.3    61.8    +      -       -      +
    110K  ASP*     2.9    23.5    -      -       -      +
    111K  LEU*     3.0    14.0    -      -       +      +
    156K  LEU*     3.8    21.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 108 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95K  TYR*     3.6    23.3    -      -       +      +
     97K  VAL*     4.1    12.8    -      -       +      -
    104K  ALA      3.0    11.4    +      -       -      +
    105K  HIS      2.9     7.5    +      -       -      +
    107K  ALA*     1.3    76.1    -      -       -      +
    109K  LEU*     1.3    60.5    +      -       -      +
    111K  LEU*     3.3    15.7    +      -       -      +
    112K  VAL*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 109 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31K  LEU*     5.6     0.4    -      -       +      -
     34K  THR*     4.7     8.3    -      -       +      -
     35K  LEU*     3.9    28.9    -      -       +      -
     38K  VAL*     4.2    31.0    -      -       +      -
     54K  ILE*     5.5     2.9    -      -       +      -
     95K  TYR*     4.2     6.9    -      -       +      -
    105K  HIS*     2.6    19.7    +      -       +      +
    106K  LEU*     3.5    13.9    -      -       +      +
    108K  ALA*     1.3    70.2    -      -       -      +
    110K  ASP*     1.3    68.0    +      -       -      +
    112K  VAL*     3.0    28.2    +      -       +      +
    113K  TYR*     3.0    26.8    +      -       +      -
    148K  PHE*     4.2    17.9    -      -       +      -
    152K  VAL*     4.3     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 110 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106K  LEU      2.7    13.9    +      -       -      +
    107K  ALA*     2.9    19.5    -      -       -      +
    109K  LEU*     1.3    78.9    -      -       -      +
    111K  LEU*     1.3    65.4    +      -       +      +
    113K  TYR*     3.3     2.9    +      -       -      +
    114K  ASN*     2.9    27.0    +      -       -      +
    149K  GLN*     3.4     8.5    +      -       -      +
    152K  VAL*     4.1     8.5    -      -       +      +
    153K  ARG*     2.7    49.5    +      -       -      +
    156K  LEU*     4.6    10.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 111 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107K  ALA*     3.0    20.6    -      -       +      +
    108K  ALA*     3.3    11.4    +      -       -      +
    109K  LEU      3.1     0.2    -      -       -      -
    110K  ASP*     1.3    85.6    -      -       +      +
    112K  VAL*     1.3    67.1    +      -       +      +
    114K  ASN*     2.9    29.6    +      -       +      +
    115K  GLY*     3.2     5.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 112 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30K  ASP*     5.0    11.0    -      -       -      +
     31K  LEU*     4.6    16.6    -      -       +      -
     34K  THR*     5.2     8.3    -      -       +      -
     92K  TRP*     5.7     6.5    -      -       +      -
     95K  TYR*     4.3    14.1    -      -       +      -
    108K  ALA      3.0    20.4    -      -       -      +
    109K  LEU*     3.0    24.9    +      -       +      +
    111K  LEU*     1.3    74.6    -      -       -      +
    113K  TYR*     1.3    64.2    +      -       +      +
    115K  GLY*     3.3     3.2    +      -       -      -
    116K  VAL*     3.1    29.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 113 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31K  LEU*     3.4    30.7    -      -       +      +
     35K  LEU*     3.6    16.3    -      -       +      +
     57K  GLN*     3.1    31.3    +      -       -      +
    109K  LEU*     3.0    28.2    +      -       +      +
    110K  ASP      3.6     4.0    -      -       -      +
    112K  VAL*     1.3    74.7    -      -       +      +
    114K  ASN*     1.3    57.0    +      -       -      +
    116K  VAL*     4.1     5.8    -      -       +      -
    117K  ILE*     2.7    41.6    +      -       +      +
    145K  LEU*     3.5    43.7    -      -       +      -
    148K  PHE*     3.4    31.0    -      +       -      -
    149K  GLN*     3.4    27.8    -      -       +      +
    152K  VAL*     5.5     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 114 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110K  ASP*     2.9    23.6    +      -       -      +
    111K  LEU*     2.9    19.3    +      -       -      +
    113K  TYR*     1.3    77.4    -      -       -      +
    115K  GLY*     1.3    58.0    +      -       -      +
    117K  ILE*     3.9     0.2    -      -       -      -
    118K  GLU*     2.9    35.9    +      -       -      +
    149K  GLN*     2.9    13.0    +      -       -      -
    153K  ARG*     3.1    14.4    +      -       -      +
      7L  PRO*     3.7    28.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 115 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92K  TRP*     4.2    14.5    -      -       -      -
    111K  LEU      3.2     7.7    +      -       -      -
    112K  VAL      3.3     5.1    +      -       -      -
    113K  TYR      3.2     0.2    -      -       -      -
    114K  ASN*     1.3    78.9    -      -       -      +
    116K  VAL*     1.3    59.0    +      -       -      +
    118K  GLU*     4.1     7.4    -      -       -      -
    119K  ASP*     3.1    32.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 116 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24K  GLN*     5.5     0.2    -      -       -      +
     27K  THR*     3.9    31.2    -      -       +      +
     28K  TYR*     4.7     7.9    -      -       +      -
     31K  LEU*     4.6    31.6    -      -       +      -
     92K  TRP*     4.7     7.4    -      -       +      -
    112K  VAL*     3.1    21.3    -      -       +      +
    113K  TYR*     3.0    11.5    +      -       +      +
    115K  GLY*     1.3    78.6    -      -       -      +
    117K  ILE*     1.3    60.2    +      -       +      +
    118K  GLU      3.3     0.2    -      -       -      -
    119K  ASP*     4.1     1.8    -      -       -      +
    120K  THR*     2.7    40.3    +      -       -      +
    145K  LEU*     4.7    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 117 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113K  TYR*     2.7    23.3    +      -       +      +
    114K  ASN      4.0     2.0    -      -       -      +
    116K  VAL*     1.3    70.2    -      -       +      +
    118K  GLU*     1.3    60.2    +      -       -      +
    120K  THR*     3.3     5.9    +      -       -      -
    121K  ARG*     2.9    38.9    +      -       +      +
    142K  ALA*     5.6     3.4    -      -       +      -
    145K  LEU*     4.5    10.8    -      -       +      -
    146K  GLU*     3.5    54.7    -      -       +      +
    149K  GLN*     3.4    41.7    -      -       +      +
      6L  ILE*     4.1    13.2    -      -       +      -
      7L  PRO*     4.3    10.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 118 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114K  ASN*     2.9    20.8    +      -       -      +
    115K  GLY*     4.4     5.5    -      -       -      +
    117K  ILE*     1.3    74.6    -      -       -      +
    119K  ASP*     1.3    71.6    +      -       -      +
    120K  THR      3.0     1.2    +      -       -      -
    121K  ARG*     3.1     5.3    +      -       +      +
    122K  LYS*     3.1    22.7    +      -       -      +
      7L  PRO*     3.8    31.8    +      -       +      +
      8L  GLY*     5.0     3.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 119 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23K  LYS*     3.4    32.9    +      -       +      -
     24K  GLN*     4.7     7.0    -      -       -      +
     27K  THR*     5.2     9.2    +      -       +      +
     91K  THR*     5.1     4.3    +      -       -      -
     92K  TRP*     5.0    10.5    -      -       -      -
    115K  GLY*     3.1    24.8    +      -       -      +
    116K  VAL*     4.1     3.8    -      -       -      +
    118K  GLU*     1.3    83.7    -      -       -      +
    120K  THR*     1.3    57.0    +      -       -      +
    122K  LYS*     3.8     6.2    +      -       -      +
    123K  SER*     3.1    31.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 120 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24K  GLN*     2.6    24.7    +      -       -      +
     28K  TYR*     4.8     2.1    +      -       -      +
    116K  VAL*     2.7    27.3    +      -       -      +
    117K  ILE*     3.4     7.6    -      -       -      +
    118K  GLU      3.0     0.4    +      -       -      -
    119K  ASP*     1.3    74.1    -      -       -      +
    121K  ARG*     1.3    68.9    +      -       -      +
    123K  SER*     2.8    16.8    +      -       -      -
    124K  ILE*     2.8    29.2    +      -       +      +
    138K  LEU*     3.6    28.0    -      -       +      +
    141K  HIS*     5.8     0.2    -      -       +      -
    142K  ALA*     4.5    14.6    -      -       +      +
    145K  LEU*     5.7     3.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 121 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117K  ILE*     2.9    29.1    +      -       +      +
    118K  GLU*     3.5     5.8    -      -       +      +
    120K  THR*     1.3    72.8    -      -       +      +
    122K  LYS*     1.3    63.1    +      -       -      +
    124K  ILE*     2.9    25.7    +      -       +      +
    125K  GLU*     3.0    14.6    +      -       -      +
    142K  ALA*     5.8     0.7    -      -       +      -
    146K  GLU*     2.9    38.2    +      -       -      -
      6L  ILE*     3.4    20.5    -      -       -      +
      7L  PRO      4.2    11.0    -      -       -      +
      8L  GLY*     5.1    11.1    +      -       -      -
      9L  LEU*     4.2    19.7    -      -       -      +
     71L  ARG*     3.7     5.7    -      -       -      +
    130L  LEU      5.3     0.2    +      -       -      -
    131L  ASP*     2.6    34.2    +      -       -      +
    132L  LEU*     4.8     2.6    -      -       -      +
    133L  VAL*     4.0     9.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 122 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118K  GLU      3.1    11.8    +      -       -      +
    119K  ASP*     3.9     6.7    -      -       -      +
    121K  ARG*     1.3    79.5    -      -       -      +
    123K  SER*     1.3    63.8    +      -       -      +
    124K  ILE      3.0     0.2    +      -       -      -
    125K  GLU*     3.3     6.6    +      -       -      +
    126K  LYS*     2.9    39.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 123 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20K  LEU*     3.3    32.1    +      -       -      +
     23K  LYS*     5.8     3.3    -      -       -      +
     24K  GLN*     4.3    10.9    +      -       -      -
    119K  ASP      3.1    14.3    +      -       -      -
    120K  THR*     2.8    17.1    +      -       -      -
    122K  LYS*     1.3    75.6    -      -       -      +
    124K  ILE*     1.3    57.5    +      -       -      +
    126K  LYS*     4.0     7.8    -      -       -      +
    127K  LEU*     3.0    33.8    +      -       -      +
    138K  LEU*     5.1     9.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 124 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120K  THR*     2.8    32.3    +      -       +      +
    121K  ARG*     2.9    16.3    +      -       -      +
    123K  SER*     1.3    73.8    -      -       -      +
    125K  GLU*     1.3    60.1    +      -       -      +
    126K  LYS      3.1     1.3    -      -       -      -
    127K  LEU*     2.7    31.2    +      -       -      +
    128K  GLU      3.2     8.8    +      -       -      -
    135K  GLN*     3.5    27.2    +      -       +      +
    138K  LEU*     4.1    15.3    -      -       +      +
    139K  ILE*     3.9    37.2    -      -       +      +
    142K  ALA*     4.4     8.3    -      -       +      -
    132L  LEU*     4.5    13.7    -      -       +      -
    133L  VAL*     4.9     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 125 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121K  ARG      3.0     7.3    +      -       -      +
    122K  LYS*     3.8     9.4    -      -       -      +
    124K  ILE*     1.3    80.9    -      -       -      +
    126K  LYS*     1.3    61.8    +      -       -      +
    127K  LEU      3.3     0.3    +      -       -      -
    128K  GLU*     3.4    27.0    +      -       -      +
    129K  ASP*     4.6     6.1    -      -       -      +
    135K  GLN*     5.1     0.4    -      -       -      +
    132L  LEU*     4.6    18.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 126 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20K  LEU*     4.5    25.2    -      -       +      +
    122K  LYS*     2.9    26.8    +      -       -      +
    123K  SER*     4.0     7.2    -      -       -      +
    125K  GLU*     1.3    77.9    -      -       -      +
    127K  LEU*     1.3    61.0    +      -       -      +
    129K  ASP*     4.1    10.1    +      -       -      +
    130K  LEU*     3.6    18.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 127 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17K  VAL*     3.9    29.4    -      -       +      -
     20K  LEU*     4.1    12.3    -      -       +      -
     21K  LEU*     5.0     7.0    -      -       +      -
    123K  SER*     3.0    22.2    +      -       -      +
    124K  ILE*     2.7    14.0    +      -       -      +
    126K  LYS*     1.3    76.2    -      -       -      +
    128K  GLU*     1.3    54.3    +      -       -      -
    129K  ASP      2.8    13.0    +      -       -      -
    130K  LEU*     2.8    32.3    +      -       +      +
    131K  ASP      3.2    25.9    +      -       -      +
    134K  SER*     3.2    28.9    -      -       -      +
    135K  GLN*     4.2     9.4    -      -       +      -
    138K  LEU*     4.6    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 128 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128J  GLU*     4.1    14.0    -      -       -      +
    124K  ILE      3.2     6.1    +      -       -      -
    125K  GLU*     3.4    23.4    +      -       -      +
    127K  LEU*     1.3    74.2    -      -       -      +
    129K  ASP*     1.3    64.9    +      -       -      +
    130K  LEU      5.2     0.4    -      -       -      -
    132K  LEU*     4.5    22.9    -      -       +      +
    135K  GLN*     3.3    30.1    +      -       -      +
    128L  GLU*     4.0    19.0    -      -       -      +
    132L  LEU*     4.7    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