Contacts of the helix formed by residues 260 - 285 (chain H) in PDB entry 5MGX


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 THR 260 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154F  GLN*     4.3     3.4    -      -       -      -
    238F  VAL*     5.5    10.8    -      -       -      +
    239F  LEU*     5.7     2.8    -      -       -      +
    259H  MET*     1.3    75.7    -      -       -      +
    261H  PHE*     1.3    63.7    +      -       -      +
    262H  GLU*     2.7    29.6    +      -       +      +
    263H  GLU*     2.8    46.3    +      -       +      +
    264H  GLU*     3.1    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 261 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147F  LEU*     6.0     0.2    -      -       +      -
    148F  GLY*     3.7    29.6    -      -       -      -
    150F  CYS*     3.5    20.6    -      -       -      -
    154F  GLN*     3.6    40.4    +      -       +      +
    157F  ASP*     3.6    33.9    -      -       +      -
    158F  LEU*     3.9    26.7    -      -       +      -
    239F  LEU*     5.8     4.3    -      -       +      +
    260H  THR*     1.3    76.3    +      -       -      +
    262H  GLU*     1.3    73.2    +      -       +      +
    264H  GLU*     3.2     4.1    +      -       -      +
    265H  ALA*     3.0    40.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 262 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150F  CYS*     5.6     1.6    -      -       -      -
    242F  ASN*     4.4    15.2    +      -       -      +
    260H  THR*     2.7    35.2    +      -       +      +
    261H  PHE*     1.3    92.4    +      -       +      +
    263H  GLU*     1.3    56.9    +      -       +      +
    265H  ALA*     3.8     5.0    +      -       -      +
    266H  GLN*     3.1    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 263 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213H  THR*     5.3     1.2    +      -       -      -
    214H  GLY*     3.8    20.5    +      -       -      -
    215H  GLN*     3.2    40.2    +      -       -      +
    218H  VAL*     5.1     1.3    -      -       +      +
    259H  MET*     3.3    16.6    -      -       +      +
    260H  THR*     2.8    45.2    +      -       +      +
    261H  PHE      3.2     0.4    -      -       -      -
    262H  GLU*     1.3    75.8    -      -       +      +
    264H  GLU*     1.4    57.7    +      -       -      +
    266H  GLN*     3.4    11.7    +      -       -      +
    267H  LEU*     3.0    38.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 264 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97F  LEU*     3.7    20.6    -      -       +      +
     99F  ASN*     5.4     1.6    +      -       -      -
    154F  GLN*     3.9    14.4    -      -       -      +
    158F  LEU*     4.3    15.9    -      -       +      -
    176F  LYS*     3.1    28.6    +      -       -      -
    177F  TYR*     3.1    23.8    +      -       +      -
    254H  SER*     5.6     5.7    -      -       -      -
    259H  MET*     4.1    11.0    -      -       +      +
    260H  THR      3.1    18.8    +      -       -      +
    261H  PHE*     3.2     8.3    +      -       -      +
    263H  GLU*     1.4    74.4    -      -       -      +
    265H  ALA*     1.3    56.7    +      -       -      +
    267H  LEU*     3.3    10.9    +      -       -      +
    268H  LEU*     3.0    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 265 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158F  LEU*     4.9     2.8    -      -       +      +
    261H  PHE*     3.0    32.0    +      -       +      +
    262H  GLU*     4.0     5.8    -      -       -      +
    264H  GLU*     1.3    73.2    -      -       -      +
    266H  GLN*     1.4    58.6    +      -       -      +
    268H  LEU*     3.0    14.7    +      -       +      +
    269H  GLN*     3.0    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 266 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215H  GLN*     4.9     9.5    +      -       -      -
    218H  VAL*     3.9    35.4    -      -       +      +
    262H  GLU      3.1    20.5    +      -       -      +
    263H  GLU*     3.4    11.0    +      -       -      +
    265H  ALA*     1.4    73.1    -      -       -      +
    267H  LEU*     1.3    62.1    +      -       -      +
    269H  GLN*     3.4    11.2    +      -       +      +
    270H  LEU*     3.2    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 267 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214H  GLY*     4.2    20.2    -      -       -      +
    217H  ARG*     3.8    42.6    -      -       +      +
    218H  VAL*     3.9    13.7    -      -       +      +
    251H  ILE*     3.6    43.3    -      -       +      +
    259H  MET*     5.7     3.6    -      -       +      -
    263H  GLU*     3.0    27.8    +      -       +      +
    264H  GLU*     3.7     9.0    -      -       -      +
    266H  GLN*     1.3    74.1    -      -       -      +
    268H  LEU*     1.4    59.3    +      -       -      +
    269H  GLN      3.4     0.2    -      -       -      -
    270H  LEU*     3.4     8.8    +      -       +      +
    271H  LYS*     3.0    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 268 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96F  ILE*     3.5    32.8    -      -       +      +
     97F  LEU*     3.8    25.6    -      -       +      -
    158F  LEU*     4.1    19.5    -      -       +      +
    251H  ILE*     5.6     0.2    -      -       -      -
    264H  GLU      3.0    16.5    +      -       -      +
    265H  ALA*     3.0    13.0    +      -       -      +
    267H  LEU*     1.4    74.2    -      -       -      +
    269H  GLN*     1.4    69.0    +      -       -      +
    271H  LYS*     3.3    18.6    +      -       -      +
    272H  VAL*     3.1    28.5    +      -       -      +
    301H  HIS*     4.5    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 269 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265H  ALA*     3.0    19.0    +      -       +      +
    266H  GLN*     3.5    11.4    -      -       -      +
    268H  LEU*     1.4    80.5    -      -       -      +
    270H  LEU*     1.3    57.8    +      -       -      +
    272H  VAL*     2.9    20.3    -      -       -      +
    273H  LYS*     3.3    22.4    +      -       -      +
    302H  GLN*     3.6    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 270 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218H  VAL*     3.8    16.8    -      -       +      +
    221H  ALA*     3.8    27.1    -      -       +      -
    222H  ASN*     3.5    41.5    -      -       -      +
    225H  ARG*     4.2    13.2    -      -       -      +
    251H  ILE*     4.0    11.4    -      -       +      -
    266H  GLN      3.2    11.3    +      -       -      +
    267H  LEU*     3.5    12.1    -      -       +      +
    268H  LEU      3.2     0.4    -      -       -      -
    269H  GLN*     1.3    78.4    -      -       -      +
    271H  LYS*     1.3    58.9    +      -       -      +
    273H  LYS*     3.3    12.9    +      -       +      +
    274H  CYS*     3.0    36.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 271 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95F  ASP      4.0     3.8    +      -       -      -
     96F  ILE      3.2    18.3    +      -       -      -
     97F  LEU      3.3     3.3    -      -       -      +
     98F  GLY*     3.2    35.8    -      -       -      +
    248H  ILE*     4.6    10.3    -      -       +      +
    251H  ILE*     3.7    23.3    -      -       +      +
    252H  THR*     3.9    21.0    -      -       +      +
    267H  LEU      3.0    17.7    +      -       -      +
    268H  LEU*     3.3    17.9    +      -       +      +
    270H  LEU*     1.3    75.3    -      -       -      +
    272H  VAL*     1.4    52.9    +      -       -      +
    274H  CYS*     3.3     4.4    +      -       -      +
    275H  LEU*     2.8    50.4    +      -       +      +
    301H  HIS*     4.6    13.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 272 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268H  LEU*     3.1    17.0    +      -       +      +
    269H  GLN*     2.9    29.8    -      -       -      +
    271H  LYS*     1.4    71.3    -      -       +      +
    273H  LYS*     1.4    62.3    +      -       +      +
    275H  LEU*     3.4     6.5    +      -       +      -
    276H  ASN*     3.0    30.0    +      -       -      +
    298H  VAL*     3.6    22.5    -      -       +      +
    301H  HIS*     3.6    43.1    -      -       +      +
    302H  GLN*     3.5    31.2    -      -       -      +
    305H  ASN*     5.7     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 273 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225H  ARG*     4.7    17.3    -      -       -      +
    269H  GLN*     3.3    20.7    +      -       -      +
    270H  LEU*     3.3    21.6    +      -       +      +
    272H  VAL*     1.4    78.6    -      -       +      +
    274H  CYS*     1.3    55.1    -      -       -      +
    276H  ASN*     3.5     6.3    +      -       -      +
    277H  ASN*     3.0    38.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 274 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221H  ALA      4.8     1.6    -      -       -      -
    225H  ARG*     4.0    24.7    -      -       -      -
    244H  TYR*     3.8    11.7    -      -       +      +
    247H  ALA*     3.7    24.5    -      -       -      -
    248H  ILE*     3.8    21.1    -      -       +      -
    251H  ILE*     4.5     7.6    -      -       -      -
    270H  LEU*     3.0    29.8    +      -       -      +
    271H  LYS*     3.6     5.2    -      -       -      +
    273H  LYS*     1.3    73.2    -      -       -      +
    275H  LEU*     1.4    54.1    +      -       -      +
    277H  ASN*     3.3     9.5    +      -       -      +
    278H  LEU*     2.8    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 275 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248H  ILE*     3.9    24.0    -      -       +      -
    271H  LYS*     2.8    44.6    +      -       +      +
    272H  VAL*     4.7     2.5    -      -       -      -
    274H  CYS*     1.4    69.2    -      -       -      +
    276H  ASN*     1.3    60.0    +      -       -      +
    278H  LEU*     3.4     7.3    +      -       +      +
    279H  ALA*     3.0    24.1    +      -       -      +
    294H  SER*     3.4    33.1    -      -       -      +
    297H  LEU*     4.1    36.6    -      -       +      -
    298H  VAL*     3.6    19.3    -      -       +      +
    301H  HIS*     4.9     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 276 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272H  VAL      3.0    18.3    +      -       -      +
    273H  LYS*     3.5     9.1    -      -       -      +
    275H  LEU*     1.3    72.3    -      -       -      +
    277H  ASN*     1.3    61.8    +      -       -      +
    279H  ALA*     3.5     6.5    +      -       -      +
    280H  ALA      3.1    18.2    +      -       -      -
    295H  CYS*     5.8     0.8    -      -       -      +
    298H  VAL*     3.6     7.8    -      -       +      +
    305H  ASN*     3.9    11.7    +      -       -      +
    307H  LYS*     3.4    19.5    -      -       -      +
    308H  ALA*     3.4    37.8    -      -       -      +
    311H  ARG*     3.0    43.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 277 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707D  GLU*     3.7    29.1    +      -       -      +
    225H  ARG*     4.0    15.0    -      -       -      +
    229H  ASN*     3.1    27.8    +      -       -      +
    232H  TYR*     4.9     0.9    -      -       -      -
    244H  TYR*     3.4    27.9    -      -       +      -
    273H  LYS*     3.0    23.9    +      -       -      +
    274H  CYS      3.5     6.1    -      -       -      +
    276H  ASN*     1.3    78.3    -      -       -      +
    278H  LEU*     1.3    60.3    +      -       -      +
    280H  ALA*     3.5     7.6    -      -       -      +
    281H  SER*     3.0    27.7    +      -       -      -
    311H  ARG*     4.8     1.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 278 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241H  ALA*     3.4    39.7    -      -       +      +
    244H  TYR*     3.8    11.6    -      -       +      -
    245H  ASP*     4.3    16.8    -      -       +      +
    248H  ILE*     3.8    22.2    -      -       +      -
    274H  CYS      2.8    16.2    +      -       -      +
    275H  LEU*     3.5    10.5    -      -       +      +
    277H  ASN*     1.3    73.0    -      -       -      +
    279H  ALA*     1.4    53.8    +      -       -      +
    281H  SER*     3.1     4.3    +      -       -      -
    282H  GLN*     2.8    59.6    +      -       -      +
    294H  SER*     3.7    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 279 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275H  LEU      3.0    16.3    +      -       -      +
    276H  ASN*     3.7     7.6    -      -       -      +
    278H  LEU*     1.4    74.3    -      -       -      +
    280H  ALA*     1.4    54.7    +      -       -      +
    282H  GLN*     3.3    12.6    +      -       -      +
    283H  LEU*     2.8    37.7    +      -       -      +
    291H  ALA*     3.6    24.0    -      -       +      +
    294H  SER*     3.8     5.2    -      -       -      -
    295H  CYS*     3.7    20.4    -      -       -      +
    311H  ARG*     4.9     4.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 280 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707D  GLU*     5.8     1.1    -      -       +      -
    232H  TYR*     3.9    21.2    +      -       +      +
    276H  ASN      3.1     8.0    +      -       -      +
    277H  ASN*     3.5    12.6    -      -       -      +
    279H  ALA*     1.4    74.8    -      -       -      +
    281H  SER*     1.4    60.3    +      -       -      +
    283H  LEU*     3.7     9.0    +      -       -      +
    284H  LYS*     3.4    27.0    +      -       -      +
    311H  ARG*     3.5    41.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 281 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232H  TYR*     3.5    18.0    -      -       -      -
    237H  PHE*     3.8    22.7    -      -       -      +
    240H  ALA*     3.7     4.3    -      -       -      +
    241H  ALA*     4.0    12.8    -      -       -      -
    244H  TYR*     3.3    17.0    -      -       -      -
    277H  ASN      3.0    13.6    +      -       -      -
    278H  LEU*     3.1     9.5    +      -       -      -
    280H  ALA*     1.4    73.4    -      -       -      +
    282H  GLN*     1.4    62.4    +      -       -      +
    284H  LYS*     3.3    14.0    +      -       -      +
    285H  LEU*     3.3    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 282 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241H  ALA*     5.1     5.6    -      -       +      +
    278H  LEU*     2.8    47.6    +      -       +      +
    279H  ALA*     3.4     5.1    +      -       -      +
    281H  SER*     1.4    68.9    -      -       -      +
    283H  LEU*     1.3    59.9    +      -       -      +
    285H  LEU*     3.2    11.7    +      -       +      -
    287H  HIS*     2.8    44.8    +      -       +      +
    290H  ALA*     3.5    26.3    +      -       +      +
    291H  ALA*     3.4    20.1    -      -       +      -
    294H  SER*     3.0    23.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 283 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    706D  GLU*     5.9     2.0    -      -       -      +
    279H  ALA      2.8    21.3    +      -       -      +
    280H  ALA*     3.7     7.9    -      -       -      +
    282H  GLN*     1.3    71.3    -      -       -      +
    284H  LYS*     1.4    63.4    +      -       +      +
    286H  ASP*     2.9    27.1    +      -       -      +
    287H  HIS      4.8     1.1    -      -       -      +
    288H  TYR*     4.1     5.4    -      -       +      -
    291H  ALA*     3.8     5.8    -      -       +      +
    311H  ARG*     4.1    30.7    -      -       +      +
    314H  LYS*     4.2    24.7    -      -       +      +
    315H  VAL*     3.7    28.3    -      -       +      -
    318H  GLN*     3.4    33.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 284 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    706D  GLU*     2.9    30.7    +      -       -      +
    232H  TYR*     3.5    17.7    +      -       -      +
    237H  PHE*     3.6    48.7    -      -       +      -
    280H  ALA      3.4    13.6    +      -       -      +
    281H  SER      3.3    11.9    +      -       -      +
    283H  LEU*     1.4    80.9    -      -       +      +
    285H  LEU*     1.3    59.4    +      -       -      +
    286H  ASP*     3.3     7.5    +      -       -      +
    314H  LYS*     5.6     4.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 285 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237H  PHE*     3.7    39.9    -      -       +      +
    238H  VAL*     3.7    28.5    -      -       +      +
    241H  ALA*     4.8     6.1    -      -       +      -
    281H  SER      3.3    13.2    +      -       -      +
    282H  GLN*     3.2    12.2    +      -       +      +
    283H  LEU      3.1     1.2    -      -       -      -
    284H  LYS*     1.3    75.9    -      -       -      +
    286H  ASP*     1.3    66.7    +      -       -      +
    287H  HIS*     3.0    12.2    +      -       +      +
----------------------------------------------------------
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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