Contacts of the helix formed by residues 296 - 319 (chain A) in PDB entry 5I4V


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 GLY 296 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294A  GLN      4.1     0.4    +      -       -      -
    295A  LEU*     1.3    77.6    -      -       -      +
    297A  ARG*     1.3    60.9    +      -       -      -
    298A  GLU      3.3     2.9    -      -       -      -
    299A  ASP*     3.3    11.3    +      -       -      +
    300A  GLN*     3.1    23.9    +      -       -      +
    388A  GLU*     4.8     9.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 297 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293A  LEU*     4.4    13.1    +      -       -      +
    295A  LEU      3.8     0.6    +      -       -      -
    296A  GLY*     1.3    69.8    -      -       -      -
    298A  GLU*     1.3    66.1    +      -       +      +
    300A  GLN*     3.3    34.4    +      -       -      +
    301A  ILE*     3.2    28.9    +      -       +      +
    472A  HIS*     3.2    42.0    -      -       +      +
    475A  LEU*     4.1    22.1    +      -       +      +
    476A  GLN*     3.1    36.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 298 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296A  GLY      3.3     0.8    -      -       -      -
    297A  ARG*     1.3    80.0    -      -       +      +
    299A  ASP*     1.3    59.6    +      -       -      +
    301A  ILE*     3.5    12.7    +      -       +      +
    302A  ALA*     3.0    26.3    +      -       -      +
    385A  ASN      4.9     2.4    -      -       -      +
    387A  GLN*     2.9    41.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 299 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295A  LEU*     4.7    16.8    -      -       +      +
    296A  GLY*     3.3    12.5    +      -       -      +
    298A  GLU*     1.3    77.2    -      -       -      +
    300A  GLN*     1.3    59.5    +      -       -      +
    301A  ILE      3.2     0.4    -      -       -      -
    302A  ALA*     3.7     4.2    -      -       -      +
    303A  LEU*     2.8    40.0    +      -       +      +
    385A  ASN      3.7     5.7    -      -       -      +
    386A  VAL*     3.8    11.7    -      -       +      +
    387A  GLN*     3.0    33.4    +      -       -      +
    388A  GLU*     3.0    37.0    +      -       -      +
    392A  VAL*     4.8     2.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 300 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292A  PHE*     3.1    51.4    +      -       +      +
    293A  LEU*     3.5    20.7    +      -       -      +
    295A  LEU*     3.0    25.4    +      -       +      +
    296A  GLY      3.1    14.7    +      -       -      +
    297A  ARG*     3.3    39.0    +      -       -      +
    298A  GLU      3.5     0.2    -      -       -      -
    299A  ASP*     1.3    75.4    -      -       -      +
    301A  ILE*     1.3    62.7    +      -       -      +
    303A  LEU*     3.5     1.2    +      -       -      +
    304A  LEU*     3.1    31.4    +      -       -      +
    475A  LEU*     3.6    18.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 301 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297A  ARG*     3.2    29.9    +      -       +      +
    298A  GLU*     3.5    13.2    -      -       +      +
    300A  GLN*     1.3    77.6    -      -       -      +
    302A  ALA*     1.3    58.6    +      -       -      +
    304A  LEU*     3.3     2.3    +      -       -      +
    305A  LYS*     2.9    44.6    +      -       +      +
    469A  LYS*     6.4     1.1    -      -       +      -
    471A  LEU*     4.1    26.1    -      -       +      +
    472A  HIS*     4.3    22.0    -      -       +      +
    475A  LEU*     3.9    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 302 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298A  GLU      3.0    18.5    +      -       -      +
    299A  ASP*     3.1     6.9    +      -       -      +
    301A  ILE*     1.3    77.3    -      -       -      +
    303A  LEU*     1.3    63.5    +      -       -      +
    305A  LYS*     3.6     9.4    +      -       -      +
    306A  ALA*     3.4    21.7    +      -       -      +
    383A  ARG*     4.3     4.7    -      -       -      +
    384A  PRO*     3.6    23.5    -      -       -      +
    385A  ASN*     3.9    19.1    -      -       +      +
    386A  VAL*     4.3     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 303 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292A  PHE*     4.5     3.6    -      -       +      -
    295A  LEU*     3.7    30.5    -      -       +      -
    299A  ASP*     2.8    23.3    +      -       +      +
    300A  GLN      3.9     3.1    -      -       -      +
    302A  ALA*     1.3    75.2    -      -       -      +
    304A  LEU*     1.3    62.1    +      -       +      +
    306A  ALA*     4.1     2.3    -      -       -      +
    307A  SER*     3.0    28.5    +      -       -      -
    378A  ILE*     3.4    31.2    -      -       +      +
    379A  PHE*     4.4     7.0    -      -       +      -
    380A  SER      3.4    25.1    -      -       -      +
    383A  ARG*     4.0    11.0    -      -       +      +
    386A  VAL*     4.0    15.0    -      -       +      -
    392A  VAL*     4.3    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 304 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282A  ILE*     4.8    11.7    -      -       +      -
    283A  VAL*     3.8    35.0    -      -       +      -
    286A  ALA*     4.1    10.5    -      -       +      -
    292A  PHE*     3.3    38.1    -      -       +      -
    300A  GLN      3.1    11.6    +      -       -      +
    301A  ILE      3.3     3.3    +      -       -      +
    303A  LEU*     1.3    77.7    -      -       +      +
    305A  LYS*     1.3    64.6    +      -       -      +
    307A  SER*     3.8     5.8    -      -       -      +
    308A  THR*     2.8    36.8    +      -       -      +
    378A  ILE*     4.7     8.1    -      -       +      -
    456A  ILE*     4.7     1.3    -      -       +      -
    471A  LEU*     4.3    17.0    -      -       +      -
    475A  LEU*     4.4    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 305 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301A  ILE*     2.9    37.9    +      -       +      +
    302A  ALA*     3.8     8.7    -      -       -      +
    304A  LEU*     1.3    75.8    -      -       -      +
    306A  ALA*     1.3    62.5    +      -       -      +
    308A  THR*     4.0     5.0    +      -       -      -
    309A  ILE*     5.0     1.4    +      -       -      +
    385A  ASN*     5.7     4.3    -      -       -      -
    455A  GLU*     3.4    17.2    +      -       +      +
    456A  ILE*     3.8    42.9    -      -       +      +
    457A  TRP*     4.6     7.8    +      -       -      -
    458A  ASP*     3.0    31.0    +      -       -      -
    464A  GLY      5.0     1.4    +      -       -      -
    465A  SER      6.2     0.6    -      -       -      -
    466A  GLY*     5.9     3.4    -      -       -      -
    471A  LEU*     4.4     6.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 306 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302A  ALA      3.4     9.2    +      -       -      +
    303A  LEU      4.1     0.4    -      -       -      +
    304A  LEU      3.2     0.4    -      -       -      -
    305A  LYS*     1.3    80.7    -      -       +      +
    307A  SER*     1.3    61.3    +      -       -      +
    308A  THR      3.5     0.2    -      -       -      -
    309A  ILE*     4.0    13.2    -      -       -      +
    310A  GLU*     3.9    13.5    -      -       -      +
    383A  ARG*     3.4    43.4    +      -       +      +
    384A  PRO*     4.6     9.2    -      -       +      -
    432A  SER*     4.7     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 307 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282A  ILE*     5.3     0.2    -      -       -      +
    303A  LEU      3.0    21.8    +      -       -      -
    304A  LEU*     3.3     7.8    +      -       -      +
    306A  ALA*     1.3    74.3    -      -       -      +
    308A  THR*     1.3    69.1    +      -       -      +
    309A  ILE      3.3     2.5    -      -       -      -
    310A  GLU*     3.0     4.8    +      -       -      +
    311A  ILE*     2.8    41.2    +      -       -      +
    377A  ASN*     3.4    27.6    -      -       -      -
    378A  ILE*     4.1     8.9    -      -       -      +
    383A  ARG*     3.8    10.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 308 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279A  VAL*     4.1    15.9    -      -       +      +
    282A  ILE*     3.6    27.0    -      -       +      +
    304A  LEU*     2.8    25.1    +      -       -      +
    305A  LYS      4.2     2.9    -      -       -      -
    306A  ALA      3.5     1.0    -      -       -      -
    307A  SER*     1.3    78.1    +      -       -      +
    309A  ILE*     1.3    60.0    +      -       -      +
    311A  ILE*     3.3     1.5    +      -       -      -
    312A  MET*     2.8    48.1    +      -       -      +
    456A  ILE*     3.1    29.9    -      -       +      +
    457A  TRP*     4.4     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 309 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305A  LYS      5.0     0.9    +      -       -      +
    306A  ALA      4.0    12.5    -      -       -      +
    308A  THR*     1.3    82.3    -      -       -      +
    310A  GLU*     1.3    62.3    +      -       +      +
    312A  MET*     3.3    27.7    +      -       +      +
    313A  LEU*     2.9    41.8    +      -       +      +
    349A  PHE*     4.6     9.0    -      -       +      -
    432A  SER*     3.7    31.6    -      -       -      +
    435A  HIS*     3.7    48.2    -      -       +      +
    457A  TRP*     4.2    14.9    -      -       +      +
    501A  67S      4.9     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 310 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306A  ALA      3.9     6.8    -      -       -      +
    307A  SER      3.0     6.8    +      -       -      +
    309A  ILE*     1.3    87.7    -      -       +      +
    311A  ILE*     1.3    58.8    +      -       -      +
    313A  LEU*     3.1     7.4    +      -       -      +
    314A  LEU*     3.0    30.5    +      -       -      +
    377A  ASN*     2.7    37.8    +      -       -      +
    383A  ARG*     2.8    36.8    +      -       -      -
    425A  LEU      4.8     0.7    -      -       -      +
    428A  LEU*     3.7    42.7    -      -       +      +
    429A  ARG*     3.4    16.8    +      -       -      -
    432A  SER*     4.1     7.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 311 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282A  ILE*     3.8    34.5    -      -       +      -
    285A  PHE*     6.3     0.4    -      -       +      -
    307A  SER*     2.8    37.9    +      -       -      +
    308A  THR      3.8     2.9    -      -       -      +
    310A  GLU*     1.3    73.7    -      -       -      +
    312A  MET*     1.3    60.6    +      -       -      +
    314A  LEU*     3.0     8.8    +      -       +      +
    315A  GLU*     2.8    41.6    +      -       +      +
    374A  ILE*     4.1    30.5    -      -       +      +
    377A  ASN*     4.1    11.2    -      -       -      +
    378A  ILE*     3.7    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 312 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275A  ALA*     4.7     4.0    -      -       +      +
    278A  SER*     3.1    31.2    -      -       -      +
    279A  VAL*     4.7     5.8    -      -       -      -
    282A  ILE*     4.2     3.6    -      -       +      +
    308A  THR*     2.8    43.4    +      -       -      +
    309A  ILE*     3.3    15.9    -      -       +      +
    311A  ILE*     1.3    74.2    -      -       -      +
    313A  LEU*     1.3    52.0    +      -       -      +
    315A  GLU*     3.5     3.4    +      -       -      +
    316A  THR*     2.6    38.0    +      -       -      -
    457A  TRP*     3.7    24.2    -      -       +      -
    501A  67S      3.4    54.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 313 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309A  ILE*     2.9    29.3    +      -       +      +
    310A  GLU*     3.4     8.7    -      -       -      +
    311A  ILE      3.1     0.2    -      -       -      -
    312A  MET*     1.3    74.6    -      -       -      +
    314A  LEU*     1.3    64.0    +      -       -      +
    316A  THR*     3.2     4.2    +      -       -      -
    317A  ALA*     3.0    23.9    +      -       -      +
    349A  PHE*     4.9     7.4    -      -       +      -
    353A  ILE*     3.8    35.9    -      -       +      -
    356A  PHE*     3.8    12.2    -      -       +      -
    428A  LEU*     4.0    12.3    -      -       +      -
    431A  LEU*     3.4    45.1    -      -       +      +
    432A  SER      4.9     0.9    -      -       -      +
    501A  67S      4.0    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 314 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    310A  GLU      3.0    15.0    +      -       -      +
    311A  ILE*     3.4    11.2    -      -       -      +
    313A  LEU*     1.3    76.2    -      -       -      +
    315A  GLU*     1.3    62.6    +      -       -      +
    316A  THR      3.2     0.3    +      -       -      -
    317A  ALA*     3.2     4.2    +      -       -      +
    318A  ARG*     3.1    23.3    +      -       -      +
    356A  PHE*     4.1    21.8    -      -       +      -
    360A  MET*     4.2    21.1    -      -       +      -
    370A  TYR*     3.8    18.1    -      -       +      +
    373A  LEU*     4.5    21.3    -      -       +      +
    374A  ILE*     3.9    34.5    -      -       +      -
    377A  ASN*     5.0     5.4    -      -       +      +
    424A  LYS*     5.7     0.4    -      -       +      -
    428A  LEU*     4.0    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 315 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  GLN*     2.6    32.0    +      -       -      -
    239A  ASN*     5.0     1.3    +      -       -      -
    278A  SER*     5.8     0.4    -      -       -      +
    281A  GLU*     4.8     7.0    -      -       -      +
    282A  ILE*     5.9     2.5    -      -       +      -
    311A  ILE*     2.8    32.3    +      -       +      +
    312A  MET*     3.8     4.0    -      -       -      +
    314A  LEU*     1.3    73.7    -      -       -      +
    316A  THR*     1.3    63.3    +      -       -      +
    318A  ARG*     2.9    30.3    +      -       -      +
    319A  ARG*     2.4    61.9    +      -       -      +
    370A  TYR*     6.1     0.2    -      -       -      -
    374A  ILE*     3.2     9.3    -      -       +      +
    501A  67S      4.0    21.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 316 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312A  MET      2.6    24.8    +      -       -      -
    313A  LEU*     3.4    10.3    -      -       -      +
    314A  LEU      3.1     0.4    -      -       -      -
    315A  GLU*     1.3    74.5    -      -       -      +
    317A  ALA*     1.3    66.9    +      -       -      +
    319A  ARG*     2.9    18.2    +      -       -      +
    320A  TYR*     3.4     8.3    +      -       -      +
    327A  ILE*     3.7    36.2    -      -       +      +
    329A  PHE*     4.2     6.9    -      -       +      -
    340A  PHE*     5.2     0.9    -      -       +      -
    353A  ILE*     4.0    18.8    -      -       +      -
    357A  SER*     4.6     1.3    -      -       -      +
    501A  67S      3.4    30.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 317 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313A  LEU      3.0    13.3    +      -       -      +
    314A  LEU      3.6     7.6    -      -       -      +
    316A  THR*     1.3    76.4    -      -       -      +
    318A  ARG*     1.3    63.8    +      -       -      +
    320A  TYR*     3.0    20.8    +      -       -      +
    356A  PHE*     4.2     8.3    -      -       +      -
    357A  SER*     3.5    36.1    +      -       -      +
    360A  MET*     3.8    23.9    -      -       +      +
    361A  ARG*     5.9     1.4    +      -       -      +
    370A  TYR*     4.3     2.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 318 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  GLN*     3.0    30.7    +      -       -      +
    239A  ASN*     6.0     1.8    -      -       -      -
    314A  LEU      3.1    13.4    +      -       -      +
    315A  GLU*     2.9    47.1    +      -       -      +
    317A  ALA*     1.3    76.7    -      -       -      +
    319A  ARG*     1.3    64.0    +      -       -      +
    320A  TYR      3.4     3.5    +      -       -      +
    367A  ASP*     3.3    46.6    +      -       -      +
    370A  TYR*     3.6    47.0    +      -       +      +
    374A  ILE*     4.2     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 319 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239A  ASN*     3.3    32.5    +      -       -      +
    281A  GLU*     4.1     1.0    +      -       -      -
    315A  GLU*     2.4    50.7    +      -       -      +
    316A  THR      2.9    10.6    +      -       -      +
    318A  ARG*     1.3    84.3    -      -       -      +
    320A  TYR*     1.3    61.1    +      -       -      +
    321A  ASN*     3.8     1.4    +      -       -      +
    326A  CYS      3.8     0.3    -      -       -      +
    327A  ILE*     3.4     5.5    -      -       +      -
    328A  THR*     3.0    53.9    +      -       -      +
    329A  PHE*     4.5     9.4    -      -       -      -
    330A  LEU*     4.9     5.9    +      -       -      +
    501A  67S      3.7    29.8    +      -       -      -
----------------------------------------------------------
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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