Contacts of the helix formed by residues 120 - 148 (chain I) in PDB entry 2FJC


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 ILE 120 (chain I).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63F  ILE*     4.3    13.5    -      -       +      -
     60I  ILE*     4.1    21.5    -      -       +      -
     61I  TYR      3.3    23.7    +      -       -      +
     62I  GLY*     4.0     1.8    -      -       -      -
     64I  GLU*     3.3    29.6    -      -       +      +
     65I  PHE*     3.4    30.7    -      -       -      +
     68I  VAL*     3.6    23.3    -      -       +      -
    119I  THR*     1.3    71.3    -      -       -      +
    121I  VAL*     1.3    69.4    +      -       +      +
    123I  ALA*     3.2     1.9    +      -       -      +
    124I  LEU*     2.9    36.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 121 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63F  ILE*     4.3    24.9    -      -       +      -
    119I  THR*     3.8    12.5    -      -       +      +
    120I  ILE*     1.3    77.7    -      -       +      +
    122I  SER*     1.3    62.7    +      -       -      +
    124I  LEU*     4.6     0.4    -      -       -      -
    125I  ALA*     2.9    31.5    +      -       -      +
    175I  LEU*     3.7    22.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 122 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118I  ILE*     3.8     9.8    -      -       -      +
    119I  THR*     2.8    22.5    +      -       -      -
    121I  VAL*     1.3    86.0    -      -       -      +
    123I  ALA*     1.3    60.7    +      -       -      +
    125I  ALA*     3.5     5.2    +      -       -      +
    126I  ARG*     3.1    53.9    +      -       -      +
    129I  ARG*     4.9     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 123 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56I  TYR*     3.7    25.9    -      -       +      -
     60I  ILE*     3.6    25.8    -      -       +      -
     72I  LEU*     5.6     1.3    -      -       +      -
    118I  ILE*     3.7    10.2    -      -       +      +
    119I  THR      2.9    16.5    +      -       -      +
    120I  ILE      3.7     2.7    -      -       -      +
    122I  SER*     1.3    77.9    -      -       -      +
    124I  LEU*     1.3    64.9    +      -       +      +
    126I  ARG*     3.2     4.7    +      -       -      +
    127I  VAL*     3.0    28.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 124 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63F  ILE*     4.6     7.0    -      -       +      -
     68I  VAL*     3.9    28.3    -      -       +      -
     71I  LEU*     4.4    12.1    -      -       +      -
     72I  LEU*     4.4    14.1    -      -       +      -
    120I  ILE*     2.9    37.2    +      -       +      +
    123I  ALA*     1.3    73.2    -      -       +      +
    125I  ALA*     1.3    61.5    +      -       -      +
    127I  VAL*     3.3     8.1    +      -       +      +
    128I  LYS*     2.9    30.3    +      -       -      +
    171I  LEU*     3.9    24.1    -      -       +      +
    174I  THR*     3.8    22.0    -      -       +      +
    175I  LEU*     3.8    18.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 125 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121I  VAL      2.9    20.0    +      -       -      +
    122I  SER*     3.7     7.0    -      -       -      +
    124I  LEU*     1.3    74.9    -      -       -      +
    126I  ARG*     1.3    59.2    +      -       -      +
    128I  LYS*     3.4     3.8    +      -       -      +
    129I  ARG*     3.0    41.8    +      -       -      +
    175I  LEU*     3.5    18.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 126 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52I  LYS*     5.4     3.6    -      -       -      +
     56I  TYR*     3.3    24.9    -      -       -      +
    113I  GLU*     2.7    39.6    +      -       -      -
    115I  GLU*     3.4    25.3    +      -       -      -
    118I  ILE*     3.3    20.4    -      -       -      +
    122I  SER*     3.1    31.1    +      -       -      +
    123I  ALA      3.2     5.8    +      -       -      +
    125I  ALA*     1.3    74.7    -      -       -      +
    127I  VAL*     1.3    64.7    +      -       -      +
    129I  ARG*     3.2    31.9    +      -       -      +
    130I  ASP*     3.0    27.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 127 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49I  LEU*     5.6     1.6    -      -       +      -
     53I  LEU*     3.9    21.8    -      -       +      -
     56I  TYR*     3.5    26.5    -      -       +      -
     72I  LEU*     4.4     8.5    -      -       +      -
     75I  TYR*     4.3    12.6    -      -       +      -
    123I  ALA      3.0    16.4    +      -       -      +
    124I  LEU*     3.3    15.3    -      -       +      +
    126I  ARG*     1.3    72.4    -      -       -      +
    128I  LYS*     1.3    65.1    +      -       -      +
    130I  ASP*     3.2     8.3    +      -       -      +
    131I  PHE*     2.7    40.0    +      -       +      -
    171I  LEU*     3.3    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 128 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124I  LEU      2.9    17.0    +      -       -      +
    125I  ALA*     3.5     6.3    -      -       -      +
    127I  VAL*     1.3    76.6    -      -       -      +
    129I  ARG*     1.3    57.1    +      -       -      +
    131I  PHE*     3.2     4.1    +      -       -      +
    132I  GLU*     2.9    67.6    +      -       +      +
    168I  ILE*     3.7    15.2    -      -       +      +
    171I  LEU*     3.7    21.8    -      -       +      -
    172I  GLY*     3.5    38.4    -      -       -      +
    175I  LEU*     4.1    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 129 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122I  SER      4.9     0.2    +      -       -      -
    125I  ALA*     3.0    20.9    +      -       -      +
    126I  ARG*     3.4    46.5    -      -       -      +
    128I  LYS*     1.3    76.1    -      -       -      +
    130I  ASP*     1.3    60.2    +      -       -      +
    132I  GLU*     3.2    17.3    +      -       -      +
    133I  TYR*     2.9    27.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 130 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49I  LEU*     4.2    20.5    -      -       +      +
     52I  LYS*     2.6    43.7    +      -       -      +
     56I  TYR*     5.4     0.5    -      -       -      -
    110I  ILE*     3.8    20.3    -      -       +      +
    111I  ALA      5.4     0.3    +      -       -      -
    126I  ARG      3.0    16.7    +      -       -      +
    127I  VAL*     3.7     9.3    -      -       -      +
    129I  ARG*     1.3    74.6    -      -       -      +
    131I  PHE*     1.3    61.7    +      -       -      +
    133I  TYR*     3.3     9.4    +      -       -      +
    134I  LEU*     2.9    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 131 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49I  LEU*     3.6    31.2    -      -       +      -
     53I  LEU*     4.9     2.7    -      -       +      -
     75I  TYR*     3.9    45.8    -      +       +      -
     79I  VAL*     4.5     9.0    -      -       +      -
    127I  VAL*     2.7    25.0    +      -       +      +
    128I  LYS      3.6     4.5    -      -       -      +
    130I  ASP*     1.3    74.0    -      -       -      +
    132I  GLU*     1.3    58.2    +      -       -      +
    134I  LEU*     3.3     4.5    +      -       +      +
    135I  SER*     2.8    28.9    +      -       -      -
    164I  LEU*     3.8    25.2    -      -       +      +
    167I  ALA*     3.8    27.6    -      -       +      -
    168I  ILE*     3.6    17.0    -      -       +      +
    171I  LEU*     3.8    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 132 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128I  LYS*     2.9    54.1    +      -       -      +
    129I  ARG*     3.6    19.0    -      -       -      +
    131I  PHE*     1.3    74.7    -      -       -      +
    133I  TYR*     1.3    64.8    +      -       -      +
    135I  SER*     3.1     3.8    +      -       -      -
    136I  THR*     3.0    30.7    +      -       +      +
    168I  ILE*     3.8    28.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 133 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41I  GLN*     3.5    15.6    +      -       -      -
     45I  ASP*     3.2    29.2    +      -       -      -
    109I  GLY*     3.4    30.8    -      -       -      -
    110I  ILE*     3.7    28.0    -      -       +      -
    129I  ARG      2.9    14.2    +      -       -      +
    130I  ASP*     3.6     9.9    -      -       -      +
    132I  GLU*     1.3    76.5    -      -       -      +
    134I  LEU*     1.3    68.9    +      -       +      +
    136I  THR*     3.0    23.8    +      -       -      -
    137I  ARG*     3.1    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 134 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42I  HIS*     5.2     3.4    -      -       -      +
     45I  ASP*     3.7    34.3    -      -       +      +
     46I  LEU*     3.5    26.9    -      -       +      -
     49I  LEU*     3.6    25.8    -      -       +      -
     79I  VAL*     5.6     0.7    -      -       +      -
    110I  ILE*     4.2     7.9    -      -       +      -
    130I  ASP      2.9    17.6    +      -       -      +
    131I  PHE*     3.6    10.3    -      -       +      +
    133I  TYR*     1.3    79.1    -      -       +      +
    135I  SER*     1.3    54.4    +      -       -      +
    137I  ARG*     3.2     5.1    +      -       +      +
    138I  PHE*     2.7    64.9    +      -       +      -
    164I  LEU*     4.1     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 135 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131I  PHE      2.8    18.1    +      -       -      -
    132I  GLU*     3.1     7.6    +      -       -      -
    134I  LEU*     1.3    76.8    -      -       -      +
    136I  THR*     1.3    59.2    +      -       -      +
    138I  PHE      3.4     0.2    +      -       -      -
    139I  SER*     2.9    35.6    +      -       -      -
    161I  LEU*     3.6    15.5    +      -       -      +
    164I  LEU*     3.9    14.9    -      -       -      +
    165I  GLY*     5.6     1.7    +      -       -      -
    168I  ILE*     4.0    17.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 136 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132I  GLU*     3.0    15.1    +      -       +      +
    133I  TYR*     3.0    16.0    +      -       -      -
    135I  SER*     1.3    75.3    -      -       -      +
    137I  ARG*     1.3    68.6    +      -       -      +
    139I  SER*     3.3     8.0    +      -       -      -
    140I  GLN*     3.2    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 137 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38I  GLN*     2.9    40.1    -      -       -      +
     41I  GLN*     2.9    33.4    +      -       -      +
     42I  HIS*     3.7    11.9    -      -       +      +
     45I  ASP*     4.8     1.3    -      -       -      +
    133I  TYR*     3.1    42.3    +      -       +      +
    134I  LEU*     3.6     8.1    -      -       +      +
    136I  THR*     1.3    84.1    +      -       -      +
    138I  PHE*     1.3    61.1    +      -       -      +
    140I  GLN*     2.8    44.4    +      -       -      +
    141I  THR*     3.4     8.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 138 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42I  HIS*     3.3    40.8    -      +       +      -
     46I  LEU*     3.9    20.9    -      -       +      -
     86I  ILE*     3.3    25.6    -      -       +      -
    134I  LEU*     2.7    46.9    +      -       +      +
    137I  ARG*     1.3    70.2    -      -       -      +
    139I  SER*     1.3    59.9    +      -       -      +
    141I  THR*     3.1     2.8    +      -       -      -
    142I  GLN      2.9    23.7    +      -       -      -
    157I  ILE*     3.3    25.6    -      -       +      +
    160I  ILE*     3.8    24.5    -      -       +      -
    161I  LEU*     3.4    17.7    -      -       +      -
    164I  LEU*     3.5    22.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 139 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135I  SER*     2.9    24.0    +      -       -      -
    136I  THR*     3.5     9.3    -      -       -      -
    137I  ARG      3.2     0.2    -      -       -      -
    138I  PHE*     1.3    77.0    -      -       -      +
    140I  GLN*     1.3    62.9    +      -       -      +
    142I  GLN*     3.2     5.8    +      -       -      +
    143I  VAL*     3.0    30.4    +      -       -      +
    161I  LEU*     4.0    20.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 140 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38I  GLN*     3.6     6.5    -      -       -      +
    136I  THR*     3.2    18.0    +      -       -      +
    137I  ARG*     2.8    53.0    +      -       -      +
    138I  PHE      3.2     0.4    -      -       -      -
    139I  SER*     1.3    76.8    -      -       -      +
    141I  THR*     1.3    62.2    +      -       -      +
    143I  VAL*     3.3     9.1    +      -       -      +
    144I  LEU*     3.0    30.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 141 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35I  ILE*     4.6     8.3    -      -       +      -
     38I  GLN*     3.1    22.8    +      -       +      +
     39I  LEU*     3.8    28.5    -      -       +      -
     42I  HIS*     2.6    27.5    +      -       -      +
    137I  ARG      3.4     0.6    +      -       -      -
    138I  PHE      3.1     8.2    +      -       -      -
    140I  GLN*     1.3    77.4    -      -       -      +
    142I  GLN*     1.3    59.7    +      -       -      +
    144I  LEU*     3.1     9.2    +      -       -      +
    145I  ALA*     2.8    27.9    +      -       -      +
    153I  THR*     4.4     7.2    -      -       +      -
    157I  ILE*     4.0    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 142 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149G  GLY*     4.3    15.0    +      -       -      +
    151G  ALA*     3.6    30.2    -      -       +      +
    138I  PHE      2.9     8.3    +      -       -      +
    139I  SER*     3.2    10.3    +      -       -      +
    141I  THR*     1.3    76.2    -      -       -      +
    143I  VAL*     1.3    75.4    +      -       +      +
    145I  ALA*     3.8     6.5    -      -       -      +
    146I  ALA*     2.8    34.1    +      -       -      +
    154I  ASP*     2.8    34.8    -      -       -      +
    157I  ILE*     3.6    26.0    -      -       +      +
    158I  THR*     4.4     2.2    -      -       -      +
    161I  LEU*     4.2     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 143 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149G  GLY*     5.7     5.6    -      -       -      +
    139I  SER*     3.0    21.6    +      -       -      +
    140I  GLN*     3.5    10.3    -      -       -      +
    141I  THR      3.2     0.2    -      -       -      -
    142I  GLN*     1.3    92.0    -      -       +      +
    144I  LEU*     1.3    66.3    +      -       +      +
    146I  ALA*     3.3     2.4    +      -       -      +
    147I  GLU*     2.9    55.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 144 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34I  ALA*     4.2    28.7    -      -       +      +
     35I  ILE*     4.0    14.1    -      -       +      +
     38I  GLN*     4.0    27.1    -      -       +      -
    140I  GLN*     3.0    20.9    +      -       +      +
    141I  THR*     3.1     6.9    +      -       -      +
    143I  VAL*     1.3    80.2    -      -       +      +
    145I  ALA*     1.3    62.3    +      -       -      +
    147I  GLU*     3.4    12.4    +      -       -      +
    148I  SER*     3.0    27.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 145 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35I  ILE*     3.8     7.8    -      -       +      +
    141I  THR      2.8    18.8    +      -       -      +
    142I  GLN*     3.8     4.5    -      -       -      +
    144I  LEU*     1.3    72.6    -      -       -      +
    146I  ALA*     1.3    62.2    +      -       -      +
    148I  SER*     3.4     6.5    +      -       -      -
    149I  GLY      3.1     4.2    +      -       -      -
    150I  ASP*     2.8    50.2    +      -       +      +
    153I  THR*     4.1    12.8    -      -       +      -
    154I  ASP*     3.7    17.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142I  GLN*     2.8    31.2    +      -       -      +
    143I  VAL*     3.6     4.9    -      -       -      +
    145I  ALA*     1.3    75.5    -      -       -      +
    147I  GLU*     1.3    62.7    +      -       +      +
    149I  GLY*     3.3    11.8    +      -       -      -
    154I  ASP*     3.6    20.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 147 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143I  VAL*     2.9    41.5    +      -       +      +
    144I  LEU*     4.0    10.9    -      -       -      +
    146I  ALA*     1.3    79.0    -      -       +      +
    148I  SER*     1.3    58.5    +      -       -      +
    149I  GLY      3.4     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 148 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27I  PRO*     5.5     7.4    -      -       -      +
     28I  ASP*     6.3     0.2    -      -       -      -
     31I  ALA*     3.5    29.1    -      -       -      +
     35I  ILE*     3.5    17.2    -      -       -      +
    144I  LEU      3.0    17.5    +      -       -      -
    145I  ALA      3.4     5.5    +      -       -      -
    147I  GLU*     1.3    76.6    -      -       -      +
    149I  GLY*     1.3    59.5    +      -       -      +
    150I  ASP*     3.4     4.9    +      -       -      +
----------------------------------------------------------
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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