Contacts of the helix formed by residues 98 - 122 (chain D) in PDB entry 2PGW


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 98 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  PHE*     4.6     3.0    -      -       -      -
     91D  TYR*     3.6    28.0    -      -       +      -
     96D  ALA*     2.7    27.8    +      -       +      +
     97D  ASN*     1.3    72.1    -      -       -      +
     99D  MSE      1.3    64.5    +      -       -      +
    100D  ARG*     3.3     2.7    -      -       -      -
    101D  ALA*     3.3    14.2    +      -       +      -
    102D  ALA*     3.0    18.9    +      -       -      +
     55E  PRO*     4.8     8.1    -      -       +      -
    100E  ARG*     3.6    18.4    -      -       +      +
    101E  ALA*     3.5    39.7    -      -       +      +
    104E  GLN*     3.7    22.0    -      -       +      +
    251E  PHE*     4.9     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with MSE 99 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  PHE*     3.9    24.2    -      -       +      -
     97D  ASN      3.5     5.7    +      -       -      -
     98D  ILE*     1.3    73.8    -      -       -      +
    100D  ARG*     1.3    58.3    +      -       +      +
    102D  ALA*     3.2     1.2    +      -       -      +
    103D  ASN*     2.9    47.7    +      -       -      +
    252D  THR*     3.7    33.4    -      -       +      -
    253D  LEU*     5.2     1.6    -      -       -      -
    254D  TYR*     4.0    19.7    -      -       +      -
    100E  ARG*     5.4     1.2    -      -       -      +
    228E  TRP*     3.2    63.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 100 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98D  ILE      3.3     0.6    -      -       -      -
     99D  MSE      1.3    76.6    -      -       -      +
    101D  ALA*     1.3    63.8    +      -       -      +
    103D  ASN*     3.2    11.4    +      -       -      +
    104D  GLN*     3.2    18.7    +      -       -      +
    227D  SER      5.2     2.8    +      -       -      -
    228D  TRP*     3.5    25.4    -      -       -      +
    248D  GLN      4.1     6.3    +      -       -      -
    249D  ALA*     3.7    13.5    +      -       -      +
    251D  PHE*     3.5    39.6    -      -       +      +
    252D  THR*     3.9    10.0    -      -       +      +
    255D  ASP*     3.0    32.6    +      -       -      -
    273D  ARG      4.9     1.0    -      -       -      +
    274D  GLU      4.7     1.2    -      -       -      +
     97E  ASN*     2.8    28.6    +      -       -      +
     98E  ILE*     3.6    20.5    -      -       +      +
     99E  MSE      5.2     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 101 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91D  TYR*     4.9     1.8    -      -       +      -
     98D  ILE*     3.3    18.7    +      -       +      +
     99D  MSE      3.3     0.2    -      -       -      -
    100D  ARG*     1.3    78.6    -      -       -      +
    102D  ALA*     1.3    62.3    +      -       -      +
    104D  GLN*     3.3    19.9    -      -       -      +
    105D  ILE*     3.7    10.9    +      -       -      +
     98E  ILE*     3.4    19.1    -      -       +      +
    101E  ALA*     3.4    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 102 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  PHE*     3.5    38.6    -      -       +      -
     91D  TYR*     3.8    24.6    +      -       +      -
     98D  ILE      3.0    11.0    +      -       -      +
     99D  MSE      3.6     2.5    -      -       -      +
    101D  ALA*     1.3    75.8    -      -       -      +
    103D  ASN*     1.3    61.8    +      -       -      +
    105D  ILE*     3.0     5.2    +      -       -      +
    106D  PHE*     2.8    40.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  MSE      2.9    40.4    +      -       -      +
    100D  ARG*     3.2     4.4    +      -       -      +
    102D  ALA*     1.3    77.3    -      -       -      +
    104D  GLN*     1.3    55.2    +      -       -      +
    106D  PHE*     4.4     7.4    -      -       -      +
    107D  SER*     2.8    36.0    +      -       -      -
    251D  PHE      4.4     0.2    +      -       -      -
    252D  THR*     4.0    13.1    -      -       -      +
    273D  ARG      3.7     2.0    -      -       -      +
    274D  GLU      3.0    28.6    +      -       -      +
    275D  ILE*     3.4    21.1    +      -       -      +
    276D  GLY*     3.4    13.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 104 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51D  CYS*     3.6    17.7    -      -       -      +
     52D  THR*     3.1    48.8    +      -       -      +
     53D  VAL      4.0     1.0    -      -       -      -
     54D  ALA*     3.0    29.6    +      -       -      +
     60D  THR*     4.5     6.4    -      -       -      +
    100D  ARG      3.2     8.9    +      -       -      +
    101D  ALA      3.3    12.0    -      -       -      +
    102D  ALA      3.1     0.4    -      -       -      -
    103D  ASN*     1.3    78.6    -      -       -      +
    105D  ILE*     1.3    66.4    +      -       +      +
    107D  SER*     3.8     8.1    -      -       -      -
    273D  ARG*     3.5    20.1    +      -       +      +
     96E  ALA*     4.1    11.5    -      -       -      +
     98E  ILE*     3.8    22.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51D  CYS*     3.1    26.4    -      -       +      -
     52D  THR      5.2     0.4    -      -       -      +
     60D  THR*     4.2    32.1    -      -       +      +
     63D  ILE*     4.1    17.0    -      -       +      -
     64D  LEU*     3.7    31.9    -      -       +      +
     67D  LEU*     3.5    27.1    -      -       +      -
     91D  TYR*     4.1     5.6    -      -       -      +
    101D  ALA      3.7    13.0    -      -       -      +
    102D  ALA      3.0     5.0    +      -       -      +
    104D  GLN*     1.3    86.9    -      -       -      +
    106D  PHE*     1.3    64.6    +      -       -      +
    107D  SER      3.1     3.2    +      -       -      -
    108D  GLY      3.1     2.1    +      -       -      -
    109D  ILE*     3.6     7.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67D  LEU*     3.9    19.1    -      -       +      -
     83D  ILE*     3.5    41.2    -      -       +      +
     86D  ILE*     3.7    25.4    -      -       +      -
     87D  PHE*     3.7    44.4    -      +       +      -
     91D  TYR*     4.2     4.0    -      +       -      -
    102D  ALA*     2.8    45.3    +      -       +      +
    103D  ASN*     4.1     9.4    -      -       -      +
    105D  ILE*     1.3    70.7    -      -       -      +
    107D  SER*     1.3    59.3    +      -       -      +
    109D  ILE*     3.7    13.7    -      -       +      -
    110D  ASP*     2.8    34.7    +      -       -      +
    276D  GLY*     3.8    10.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 107 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50D  GLU      4.5     4.6    +      -       -      -
     51D  CYS*     6.0     0.2    -      -       -      -
    103D  ASN      2.8    15.6    +      -       -      -
    104D  GLN      3.8     8.7    -      -       -      -
    105D  ILE      3.1     0.2    -      -       -      -
    106D  PHE*     1.3    75.8    -      -       -      +
    108D  GLY*     1.3    58.1    +      -       -      +
    110D  ASP*     3.9     1.4    -      -       -      +
    111D  MSE      3.0    33.7    +      -       -      +
    272D  PRO*     2.8    43.6    +      -       -      +
    273D  ARG*     3.4     8.2    +      -       -      -
    276D  GLY      3.6    12.1    +      -       -      -
    277D  GLY*     3.6     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 108 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37D  ILE*     3.5    18.1    -      -       -      +
     49D  GLY*     3.9     0.3    -      -       -      -
     50D  GLU      3.3    24.4    +      -       -      -
     51D  CYS*     3.6    14.6    -      -       -      -
    105D  ILE      3.1     5.1    +      -       -      -
    107D  SER*     1.3    78.5    -      -       -      +
    109D  ILE*     1.3    64.7    +      -       -      +
    111D  MSE      3.2     5.7    -      -       -      +
    112D  ALA      3.0    18.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 109 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37D  ILE*     3.8    17.2    -      -       +      +
     39D  ILE*     3.9     3.5    -      -       +      +
     51D  CYS*     4.7     0.2    -      -       -      -
     64D  LEU*     3.8    16.2    -      -       +      -
     67D  LEU*     5.3     3.1    -      -       +      -
     68D  ALA*     3.4    39.9    -      -       +      +
     71D  LEU*     3.7    25.8    -      -       +      -
     83D  ILE*     4.2    19.3    -      -       +      -
     86D  ILE*     6.2     0.9    -      -       +      -
    105D  ILE*     3.6     8.1    +      -       +      +
    106D  PHE*     3.1    20.1    +      -       +      +
    108D  GLY*     1.3    74.6    -      -       -      +
    110D  ASP*     1.3    64.2    +      -       -      +
    112D  ALA*     3.1     5.5    +      -       -      +
    113D  MSE      2.9    31.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 110 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  VAL*     3.3    19.0    -      -       -      +
     83D  ILE*     4.0    13.2    -      -       +      +
    106D  PHE      2.8    19.4    +      -       -      +
    107D  SER      3.9     1.8    -      -       -      +
    109D  ILE*     1.3    75.0    -      -       -      +
    111D  MSE      1.3    64.6    +      -       -      +
    113D  MSE      3.2     1.0    +      -       -      +
    114D  TRP*     3.0    53.1    +      -       -      -
    276D  GLY      3.9     9.6    -      -       -      +
    277D  GLY*     4.0     2.5    -      -       -      -
    278D  ILE*     2.7    29.1    +      -       -      +
    279D  GLN*     3.1    16.6    +      -       -      +
    280D  PRO*     4.2     5.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with MSE 111 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  ILE      4.3     2.2    -      -       -      -
     49D  GLY*     3.8     5.2    -      -       -      -
     50D  GLU      3.7    23.8    -      -       -      +
    107D  SER*     3.0    20.4    +      -       -      +
    108D  GLY      3.2    10.1    -      -       -      +
    110D  ASP*     1.3    78.4    +      -       -      +
    112D  ALA*     1.3    63.3    +      -       -      +
    114D  TRP*     3.5     2.6    +      -       -      +
    115D  ASP*     3.1    21.7    +      -       -      +
    272D  PRO*     5.4     7.2    -      -       +      -
    278D  ILE*     4.1    15.1    -      -       +      +
    305D  ILE*     3.1    45.1    -      -       +      +
    306D  THR*     4.3    12.8    -      -       -      -
    309D  ALA*     3.4    20.6    -      -       +      -
    356D  LEU*     3.3    31.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 112 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37D  ILE*     3.9     6.7    -      -       +      +
     39D  ILE*     3.5    22.2    -      -       +      -
     47D  GLY*     3.5    19.8    -      -       -      +
     48D  ILE      3.8    12.7    +      -       -      +
     49D  GLY      3.8     9.4    -      -       -      +
    108D  GLY      3.0     9.0    +      -       -      +
    109D  ILE      3.5     7.0    -      -       -      +
    111D  MSE      1.3    78.6    -      -       -      +
    113D  MSE      1.3    59.6    +      -       -      +
    115D  ASP*     3.2     2.3    +      -       -      +
    116D  LEU*     2.8    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MSE 113 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6D  ILE*     3.8    23.3    -      -       +      -
     39D  ILE*     3.7    23.6    -      -       +      -
     71D  LEU*     4.1     9.2    -      -       +      -
     75D  SER      3.7     8.7    -      -       -      +
     76D  PRO*     3.7    36.8    -      -       +      +
     79D  VAL*     3.7    41.7    -      -       +      -
     82D  LEU*     3.9    10.3    -      -       +      -
    109D  ILE*     2.9    26.8    +      -       +      +
    110D  ASP      3.2     4.9    +      -       -      +
    112D  ALA*     1.3    76.4    -      -       -      +
    114D  TRP*     1.3    57.6    +      -       -      +
    116D  LEU*     3.3     7.8    +      -       -      +
    117D  GLN*     2.9    32.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 114 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  VAL*     3.8    15.5    -      -       +      +
    110D  ASP*     3.0    56.2    +      -       -      +
    113D  MSE      1.3    75.5    -      -       +      +
    115D  ASP*     1.3    66.5    +      -       -      +
    117D  GLN*     3.6    31.0    -      -       -      +
    118D  GLY*     2.9    19.4    +      -       -      -
    125D  VAL*     3.7    19.1    -      -       +      +
    128D  LEU*     4.1    26.1    -      -       +      +
    129D  LEU*     4.3    23.1    -      -       +      -
    278D  ILE*     4.1    24.5    -      -       +      -
    279D  GLN*     3.8    37.1    -      -       +      +
    128H  LEU      4.3    12.1    -      -       -      -
    129H  LEU*     4.6     0.4    -      -       -      -
    130H  GLY*     4.1    17.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 115 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47D  GLY*     3.2     1.9    -      -       -      -
     48D  ILE*     2.8    30.4    +      -       -      +
    111D  MSE      3.1    15.6    +      -       -      +
    112D  ALA      3.2     8.0    +      -       -      +
    114D  TRP*     1.3    75.6    -      -       -      +
    116D  LEU*     1.3    58.6    +      -       -      +
    118D  GLY      3.2     1.4    +      -       -      -
    119D  LYS*     2.8    63.9    +      -       -      +
    125D  VAL*     4.3     0.6    -      -       -      +
    355D  GLY*     3.5     7.8    -      -       -      -
    356D  LEU*     2.8    41.3    +      -       +      +
    357D  GLY      4.3     0.9    +      -       -      -
    358D  PHE*     4.4     4.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 116 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6D  ILE*     4.7     2.2    -      -       +      -
     39D  ILE*     3.8    31.9    -      -       +      +
     41D  ALA*     4.2    11.0    -      -       +      -
     45D  THR*     3.6    46.0    -      -       +      +
     47D  GLY*     3.7    16.1    -      -       -      +
     76D  PRO*     3.8    25.4    -      -       +      -
    112D  ALA      2.8    17.0    +      -       -      +
    113D  MSE      3.4     8.1    -      -       -      +
    115D  ASP*     1.3    78.6    -      -       -      +
    117D  GLN*     1.3    60.9    +      -       -      +
    119D  LYS*     3.5     2.9    +      -       -      +
    120D  LEU*     3.0    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 117 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76D  PRO*     3.2    28.4    +      -       +      +
     77D  HIS*     3.5    34.1    +      -       +      +
     79D  VAL*     3.8    14.5    -      -       -      +
    113D  MSE      2.9    18.6    +      -       -      +
    114D  TRP*     3.2    43.4    +      -       -      +
    116D  LEU*     1.3    76.9    -      -       -      +
    118D  GLY*     1.3    58.2    +      -       -      +
    120D  LEU*     3.5     9.0    +      -       -      +
    121D  ALA*     3.0    29.6    +      -       -      +
    128D  LEU*     3.9    13.7    -      -       +      +
    127H  GLN      4.0     9.5    -      -       -      +
    128H  LEU*     5.2     1.9    -      -       -      -
    130H  GLY*     5.5     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 118 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114D  TRP      2.9    10.1    +      -       -      -
    117D  GLN*     1.3    75.3    -      -       -      +
    119D  LYS*     1.3    54.8    +      -       -      +
    121D  ALA*     3.3     1.3    +      -       -      -
    122D  GLY*     2.7    30.5    +      -       -      -
    123D  LEU      2.8    30.1    +      -       -      +
    128D  LEU*     3.6    13.4    -      -       -      +
    355D  GLY*     3.4    12.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 119 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45D  THR*     3.6    20.6    +      -       +      -
     46D  VAL      3.0    27.4    +      -       -      +
     47D  GLY*     4.5     0.2    -      -       -      -
     48D  ILE*     4.5    10.9    -      -       -      +
    115D  ASP*     2.8    50.9    +      -       -      +
    116D  LEU      3.9     0.7    -      -       -      +
    118D  GLY*     1.3    75.2    -      -       -      +
    120D  LEU*     1.3    62.7    +      -       -      +
    122D  GLY*     3.3    10.9    +      -       -      -
    354D  PRO*     3.9    25.1    -      -       +      +
    357D  GLY      5.7     0.9    -      -       -      +
    358D  PHE*     4.9    17.8    +      -       -      +
    359D  GLN*     5.8     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 120 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4D  VAL*     4.4    22.0    -      -       +      -
     41D  ALA*     4.8     0.4    -      -       +      -
     43D  ASP*     3.5    29.8    -      -       -      +
     45D  THR*     3.5    18.8    -      -       +      +
     76D  PRO*     4.1    28.5    -      -       +      -
     77D  HIS*     4.6    15.9    -      -       +      +
    116D  LEU*     3.0    32.7    +      -       +      +
    117D  GLN*     3.7     6.1    -      -       -      +
    119D  LYS*     1.3    76.2    -      -       -      +
    121D  ALA*     1.3    58.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 121 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77D  HIS*     6.2     2.2    -      -       +      -
    117D  GLN      3.0    17.1    +      -       -      +
    118D  GLY      4.0     2.0    -      -       -      +
    120D  LEU*     1.3    77.8    -      -       -      +
    122D  GLY*     1.3    63.4    +      -       -      +
    123D  LEU*     3.8    27.6    -      -       +      +
    128D  LEU*     4.5     7.6    -      -       +      -
    121H  ALA*     5.4    11.4    -      -       +      -
    123H  LEU*     6.2     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 122 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118D  GLY      2.7    13.4    +      -       -      -
    119D  LYS      3.3    11.0    +      -       -      -
    121D  ALA*     1.3    75.4    -      -       -      +
    123D  LEU*     1.3    64.6    +      -       -      +
    124D  PRO*     4.7     1.0    -      -       -      +
    354D  PRO*     4.0    20.6    -      -       -      +
----------------------------------------------------------
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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