Contacts of the helix formed by residues 99 - 127 (chain A) in PDB entry 5FLZ


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 ASP 99 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  VAL*     6.0     6.5    -      -       +      +
     98A  MET*     1.3    75.5    -      -       -      +
    100A  PRO*     1.3    70.5    -      -       -      +
    101A  SER*     2.8    33.1    +      -       -      -
    102A  PHE*     3.5    27.4    -      -       +      -
    103A  LYS*     2.7    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  MET      4.2     2.5    -      -       -      +
     99A  ASP*     1.3    94.8    -      -       -      +
    101A  SER*     1.4    59.4    +      -       -      +
    103A  LYS*     3.8    12.9    -      -       +      +
    104A  THR*     2.9    32.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  ASP*     2.8    17.0    +      -       -      -
    100A  PRO*     1.4    81.6    -      -       -      +
    102A  PHE*     1.4    70.4    +      -       -      +
    104A  THR*     3.6     4.7    +      -       -      -
    105A  PHE*     3.1    36.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  GLU*     5.5     1.1    -      -       -      -
     59A  VAL*     3.2    35.4    -      -       +      -
     60A  VAL*     4.6    11.4    -      -       +      -
     63A  LEU*     4.3    20.2    -      -       +      +
     98A  MET*     4.1    11.9    -      -       +      -
     99A  ASP*     3.2    30.0    +      -       +      +
    101A  SER*     1.4    85.2    -      -       -      +
    103A  LYS*     1.4    54.7    +      -       -      +
    105A  PHE*     3.2    11.2    +      +       -      +
    106A  SER*     2.8    35.9    +      -       -      -
    171A  ARG*     3.4    29.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  LYS*     3.3    30.0    +      -       +      +
     97A  LYS*     3.8    13.3    -      -       -      +
     98A  MET*     3.1    45.3    +      -       -      +
     99A  ASP      2.7    18.3    +      -       -      +
    100A  PRO*     3.8    12.1    -      -       +      +
    102A  PHE*     1.4    71.7    -      -       -      +
    104A  THR*     1.4    56.2    +      -       -      +
    106A  SER*     2.8    21.9    +      -       -      -
    107A  ARG*     3.1    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  PRO      2.9    17.8    +      -       -      -
    101A  SER*     3.8     5.3    -      -       -      -
    103A  LYS*     1.4    73.9    -      -       -      +
    105A  PHE*     1.4    68.8    +      -       +      +
    107A  ARG*     3.1    16.9    +      -       +      +
    108A  ARG*     3.2    12.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  SER*     3.1    34.9    +      -       -      -
    102A  PHE*     3.2    11.0    +      +       -      +
    104A  THR*     1.4    81.3    -      -       +      +
    106A  SER*     1.3    59.3    -      -       -      +
    108A  ARG*     3.1    22.4    +      -       +      +
    109A  ILE*     3.1    26.0    +      -       +      +
    171A  ARG*     4.1    40.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  LEU*     5.9     7.6    -      -       -      -
     66A  VAL*     6.0     6.5    -      -       -      -
     96A  LYS*     2.9    22.9    +      -       -      -
     98A  MET*     3.7    13.7    -      -       -      +
    102A  PHE      2.8    14.8    +      -       -      -
    103A  LYS*     2.8    21.5    +      -       -      -
    104A  THR      3.2     0.2    -      -       -      -
    105A  PHE*     1.3    76.9    -      -       -      +
    107A  ARG*     1.4    54.2    +      -       -      +
    109A  ILE*     3.4    11.5    +      -       -      +
    110A  VAL*     3.0    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  LYS*     3.7    19.7    -      -       -      +
    103A  LYS      3.1     9.5    +      -       -      +
    104A  THR*     3.1    15.0    +      -       +      +
    106A  SER*     1.4    73.3    +      -       -      +
    108A  ARG*     1.4    66.4    +      -       -      +
    110A  VAL*     3.2    37.1    +      -       -      +
    111A  ARG*     3.4    20.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  THR      3.2     6.4    +      -       -      +
    105A  PHE*     3.1    12.5    +      -       +      +
    107A  ARG*     1.4    78.5    -      -       -      +
    109A  ILE*     1.3    70.9    +      -       -      +
    111A  ARG*     3.0    64.8    +      -       -      +
    112A  TYR*     3.4    36.6    -      -       -      +
    174A  GLU*     5.6     4.5    -      -       -      -
    178A  ASN*     4.0    24.5    +      -       -      +
    182A  VAL*     4.8     5.5    -      -       -      +
    186A  MET*     4.6     9.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  LEU*     5.3     7.4    -      -       +      -
     66A  VAL*     6.4     2.0    -      -       +      -
     67A  LEU*     4.6    27.6    -      -       +      -
    105A  PHE*     3.1    22.4    +      -       +      +
    106A  SER*     3.6    13.0    -      -       -      +
    108A  ARG*     1.3    96.2    -      -       +      +
    110A  VAL*     1.3    64.6    +      -       +      +
    112A  TYR*     3.1    14.2    +      -       +      +
    113A  GLY*     3.1    10.9    +      -       -      -
    170A  ILE*     5.0    17.9    -      -       +      -
    174A  GLU*     5.3    16.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  GLU*     5.9     1.6    -      -       -      +
     96A  LYS*     4.7    12.1    -      -       +      +
    106A  SER*     3.0    24.6    +      -       -      +
    107A  ARG*     3.3    34.8    -      -       -      +
    108A  ARG      3.2     0.2    -      -       -      -
    109A  ILE*     1.3    75.5    -      -       +      +
    111A  ARG*     1.4    59.2    +      -       +      +
    113A  GLY*     3.2     3.4    +      -       -      -
    114A  LYS*     3.0    37.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  ARG*     3.4    23.3    -      -       -      +
    108A  ARG*     3.2    56.8    +      -       -      +
    110A  VAL*     1.4    58.9    -      -       +      +
    112A  TYR*     1.3    66.1    +      -       -      +
    114A  LYS*     3.3    11.8    -      -       +      +
    115A  GLN*     3.2    24.1    +      -       -      +
    186A  MET*     5.2    10.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 112 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  ARG*     3.4    29.7    -      -       -      +
    109A  ILE*     3.1     7.7    +      -       +      +
    111A  ARG*     1.3    79.9    -      -       -      +
    113A  GLY*     1.3    65.5    +      -       -      +
    115A  GLN*     3.2     8.4    +      -       +      -
    116A  TYR*     3.1    38.7    +      +       +      +
    119A  LEU*     5.9     1.2    -      -       -      +
    146A  LEU*     4.6    12.3    -      -       -      +
    150A  TYR*     4.0    32.2    -      +       -      -
    178A  ASN*     4.6     3.1    -      -       -      +
    181A  GLU*     3.3    48.7    -      -       +      +
    182A  VAL*     4.0    19.5    -      -       +      -
    185A  GLN*     5.6     5.0    -      -       +      +
    186A  MET*     4.1    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 113 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  ILE      3.1    12.1    +      -       -      -
    110A  VAL*     3.2     3.8    +      -       -      -
    112A  TYR*     1.3    78.9    -      -       -      +
    114A  LYS*     1.4    55.7    +      -       -      +
    116A  TYR*     3.2    24.8    +      -       -      -
    117A  MET*     3.1    38.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 114 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  ILE*     3.9    21.6    +      -       -      +
     91A  GLU*     2.9    47.9    +      -       -      +
    110A  VAL*     3.0    24.0    +      -       +      +
    111A  ARG*     3.3    11.7    -      -       -      +
    113A  GLY*     1.4    69.4    -      -       -      +
    115A  GLN*     1.3    71.4    +      -       -      +
    116A  TYR      3.4     0.2    +      -       -      -
    117A  MET*     3.4     6.6    +      -       -      +
    118A  ILE*     3.0    40.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 115 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  ARG      3.2     8.8    +      -       -      +
    112A  TYR*     3.2    13.8    +      -       +      +
    114A  LYS*     1.3    84.3    -      -       -      +
    116A  TYR*     1.3    57.1    +      -       -      +
    118A  ILE*     3.2    15.6    +      -       -      +
    119A  LEU*     2.8    31.9    +      -       -      +
    185A  GLN*     6.3     1.8    -      -       +      -
    186A  MET*     3.8    35.0    -      -       +      -
    189A  LEU*     3.3    27.7    -      -       +      +
    190A  TYR*     3.6    31.0    +      -       -      +
    193A  TYR*     3.5    14.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 116 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  LEU      5.6     2.5    -      -       -      -
     68A  ILE      3.2    25.8    +      -       -      -
     69A  GLY*     3.3    14.1    +      -       -      -
     70A  LEU*     6.0     0.3    -      -       -      +
    112A  TYR*     3.1    33.5    +      +       +      +
    113A  GLY*     3.2    24.3    +      -       -      +
    115A  GLN*     1.3    75.1    -      -       -      +
    117A  MET*     1.3    84.7    +      -       +      +
    119A  LEU*     3.3    11.8    +      -       +      +
    120A  THR*     3.2    35.3    +      -       +      +
    146A  LEU*     6.1     2.9    -      -       +      -
    150A  TYR*     4.4    27.8    -      +       +      -
----------------------------------------------------------
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Residues in contact with MET 117 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  GLY*     4.1    19.3    -      -       -      +
     75A  ILE*     5.8     5.6    -      -       +      -
     91A  GLU*     5.2    13.0    -      -       +      +
     92A  PHE*     4.4    31.6    -      -       +      +
    113A  GLY*     3.1    21.8    +      -       -      +
    114A  LYS*     3.7     9.9    -      -       -      +
    116A  TYR*     1.3   103.6    -      -       +      +
    118A  ILE*     1.3    65.8    +      -       +      +
    120A  THR*     2.8    21.3    +      -       -      -
    121A  ARG*     3.3    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 118 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  ILE      5.8     0.4    -      -       -      +
     91A  GLU*     3.9    19.1    -      -       -      +
    114A  LYS*     3.0    39.7    +      -       +      +
    115A  GLN*     3.8    14.4    -      -       -      +
    117A  MET*     1.3    73.8    -      -       +      +
    119A  LEU*     1.4    66.5    +      -       -      +
    121A  ARG*     3.1    12.2    +      -       +      +
    122A  ALA*     2.9    21.8    +      -       +      +
    193A  TYR*     3.3    37.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 119 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  TYR*     5.9     1.6    -      -       -      +
    115A  GLN      2.8    17.3    +      -       -      +
    116A  TYR*     3.4    10.1    -      -       -      +
    118A  ILE*     1.4    76.7    -      -       -      +
    120A  THR*     1.3    62.5    +      -       +      +
    122A  ALA*     3.1     7.2    +      -       -      +
    123A  TYR*     2.8    29.6    +      -       +      +
    126A  TRP*     4.6    10.5    -      -       +      -
    142A  ILE*     5.2     5.8    -      -       +      -
    143A  ARG*     5.4     9.2    -      -       -      -
    146A  LEU*     3.7    29.8    -      -       +      -
    185A  GLN*     3.5    34.3    -      -       +      +
    189A  LEU*     3.8    30.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 120 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  TYR*     3.2    20.5    +      -       +      +
    117A  MET*     2.8    23.7    +      -       -      -
    119A  LEU*     1.3    80.4    -      -       +      +
    121A  ARG*     1.4    60.3    +      -       -      +
    123A  TYR*     3.2    10.4    +      -       -      +
    124A  GLU*     3.3    20.5    +      -       -      +
    143A  ARG*     3.4    38.7    +      -       -      +
    146A  LEU*     6.2     2.5    -      -       +      -
    147A  GLU*     5.7     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 121 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  TYR*     4.1    10.2    +      -       -      -
     79A  ASN*     3.3    28.7    +      -       -      -
     80A  ASP*     3.7    26.1    +      -       -      +
    117A  MET      3.3    13.5    +      -       -      +
    118A  ILE*     3.1    17.8    +      -       +      +
    120A  THR*     1.4    76.0    +      -       -      +
    122A  ALA*     1.3    62.5    +      -       -      +
    124A  GLU*     3.3    19.5    +      -       +      +
    125A  LYS*     3.4    15.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 122 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  ILE*     2.9    16.0    +      -       +      +
    119A  LEU      3.3     9.4    -      -       -      +
    121A  ARG*     1.3    73.2    -      -       -      +
    123A  TYR*     1.4    64.3    +      -       -      +
    125A  LYS*     3.2    29.5    +      -       -      +
    126A  TRP*     3.1    43.6    +      -       +      +
    189A  LEU*     3.8    13.7    -      -       +      -
    193A  TYR*     5.2     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 123 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  LEU*     2.8    17.7    +      -       +      +
    120A  THR      3.5     4.7    -      -       -      +
    121A  ARG      3.2     0.2    -      -       -      -
    122A  ALA*     1.4    79.0    -      -       -      +
    124A  GLU*     1.4    77.7    +      -       -      +
    126A  TRP*     3.3    13.1    +      +       +      +
    127A  SER*     3.1    47.4    +      -       -      +
    139A  ALA*     3.6    25.6    -      -       +      -
    140A  TYR*     3.9    16.8    -      -       -      -
    143A  ARG*     3.4    57.4    -      -       +      +
    292B  ILE*     4.8    17.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 124 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  THR*     3.3    15.4    +      -       -      +
    121A  ARG*     3.3    11.4    +      -       +      +
    123A  TYR*     1.4    90.7    -      -       +      +
    125A  LYS*     1.4    62.9    +      -       -      +
    127A  SER      2.7    25.9    -      -       -      +
    128A  ASP*     3.4    18.5    -      -       +      +
    143A  ARG*     5.2     1.5    +      -       -      +
    295B  ARG*     4.5    15.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 125 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  ARG*     3.4     8.2    +      -       -      +
    122A  ALA*     3.2    24.2    +      -       -      +
    124A  GLU*     1.4    65.4    -      -       -      +
    126A  TRP*     1.4    58.9    +      -       +      +
    128A  ASP*     5.1     1.4    -      -       -      +
    130A  SER*     2.8    23.7    +      -       -      -
    193A  TYR*     6.0     3.6    -      -       -      -
    196A  ILE*     3.8    32.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 126 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  LEU*     4.6     8.7    -      -       +      -
    122A  ALA*     3.1    29.0    +      -       +      -
    123A  TYR*     3.7    20.9    -      +       +      +
    125A  LYS*     1.4    85.8    -      -       +      +
    127A  SER*     1.3    58.5    +      -       -      +
    130A  SER*     2.8    13.0    +      -       -      -
    135A  LEU*     3.7    29.8    -      -       +      +
    136A  GLN*     3.3    17.0    -      -       -      +
    138A  PHE*     4.1    17.4    -      +       -      -
    139A  ALA*     3.5    33.9    -      -       +      -
    142A  ILE*     5.6     9.0    -      -       +      -
    188A  LEU*     6.3     1.3    -      -       +      -
    189A  LEU*     3.5    26.5    -      -       +      -
    192A  ILE*     3.7    39.3    -      -       +      +
    193A  TYR*     6.0     0.9    -      +       -      -
    196A  ILE*     4.3    12.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 127 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  TYR*     3.1    34.9    +      -       -      +
    124A  GLU*     2.7    26.0    -      -       -      +
    126A  TRP*     1.3    77.5    +      -       -      +
    128A  ASP*     1.4    56.3    +      -       -      +
    130A  SER*     3.7     0.7    -      -       -      -
    136A  GLN*     3.5    25.2    +      -       -      -
    139A  ALA*     3.3    25.3    -      -       -      +
    140A  TYR*     4.1     2.9    +      -       -      -
    324B  ASP*     5.7     1.1    -      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il