Contacts of the helix formed by residues 240 - 266 (chain B) in PDB entry 5U3W


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 GLU 240 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238B  TYR*     3.4     8.7    -      -       -      -
    239B  LYS*     1.3    87.4    +      -       +      +
    241B  ILE*     1.3    67.8    +      -       +      +
    242B  SER*     3.2     8.7    +      -       -      +
    243B  VAL*     3.3    25.1    +      -       +      +
    244B  HIS*     2.9    22.9    +      -       -      +
    321B  ARG*     2.7    48.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 241 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216B  ILE*     4.0    31.4    -      -       +      -
    219B  LEU*     3.0    39.3    -      -       +      -
    238B  TYR*     2.8    26.8    +      -       +      +
    240B  GLU*     1.3    74.7    -      -       +      +
    242B  SER*     1.3    69.7    +      -       -      +
    244B  HIS*     3.4     1.4    +      -       -      +
    245B  VAL*     2.9    36.6    +      -       +      +
    316B  PHE*     3.8    25.6    -      -       +      -
    320B  LEU*     4.4     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 242 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240B  GLU*     3.2    15.9    +      -       -      +
    241B  ILE*     1.3    85.9    -      -       -      +
    243B  VAL*     1.3    56.9    +      -       -      +
    245B  VAL*     3.7     2.9    +      -       -      +
    246B  PHE*     3.1    24.6    +      -       -      +
    320B  LEU*     3.7    19.5    -      -       -      +
    321B  ARG*     3.1    30.9    +      -       -      +
    324B  PHE*     3.8    30.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 243 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239B  LYS*     5.0    14.1    -      -       +      +
    240B  GLU*     3.3    33.6    +      -       +      +
    242B  SER*     1.3    75.2    -      -       -      +
    244B  HIS*     1.3    66.2    -      -       -      +
    246B  PHE*     3.2     7.2    +      -       -      +
    247B  TYR*     2.9    57.8    +      -       +      +
    321B  ARG*     4.2     2.9    -      -       -      +
    324B  PHE*     3.8    16.6    -      -       +      -
    424B  GLU*     4.8     0.2    -      -       -      +
    427B  THR*     3.7    24.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 244 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  LEU*     4.0    23.3    -      -       +      -
    223B  GLU*     2.8    30.6    +      -       +      +
    232B  VAL*     4.1    13.9    -      -       +      -
    235B  LEU*     3.5    30.6    -      -       +      +
    236B  PRO      5.2     5.2    +      -       -      -
    238B  TYR*     3.4    46.4    -      +       +      +
    239B  LYS      5.9     0.4    -      -       -      +
    240B  GLU      2.9     7.6    +      -       -      +
    241B  ILE*     3.6     3.6    -      -       -      +
    243B  VAL*     1.3    78.1    -      -       -      +
    245B  VAL*     1.3    61.6    +      -       +      +
    247B  TYR*     3.2    12.8    +      -       -      +
    248B  ARG*     3.0    26.2    +      -       +      +
    501B  7U1      5.7     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with VAL 245 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  LEU*     4.5     6.7    -      -       +      -
    241B  ILE*     2.9    36.2    +      -       +      +
    242B  SER      3.9     0.7    -      -       -      +
    244B  HIS*     1.3    69.4    -      -       -      +
    246B  PHE*     1.3    68.0    +      -       -      +
    248B  ARG*     3.1     8.9    +      -       -      +
    249B  CYS*     2.9    29.7    +      -       -      -
    316B  PHE*     4.4     8.5    -      -       +      -
    317B  LEU*     4.0     8.1    -      -       +      -
    320B  LEU*     3.7    29.6    -      -       +      -
    328B  ILE*     4.7     2.7    -      -       +      -
    501B  7U1      3.6    39.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 246 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242B  SER      3.1    15.4    +      -       -      +
    243B  VAL      3.3     7.6    -      -       -      +
    245B  VAL*     1.3    77.1    -      -       -      +
    247B  TYR*     1.3    63.9    +      +       -      +
    249B  CYS*     3.1     8.9    +      -       -      +
    250B  GLN*     2.9    44.9    +      -       -      +
    324B  PHE*     3.7    24.9    -      +       +      -
    327B  ILE*     5.0     4.3    -      -       +      -
    417B  MET*     3.8    30.3    -      -       +      -
    420B  ILE*     4.4    12.3    -      -       +      -
    427B  THR*     3.4    34.3    -      -       +      -
    429B  LEU*     3.8    14.4    -      -       +      -
    501B  7U1      3.9    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 247 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235B  LEU*     4.5    17.3    -      -       +      -
    236B  PRO*     3.5    48.1    -      -       +      +
    237B  PRO      5.1     4.9    -      -       -      -
    239B  LYS*     4.5     6.4    -      -       +      -
    243B  VAL*     2.9    39.3    +      -       +      +
    244B  HIS*     3.5    12.3    -      -       -      +
    246B  PHE*     1.3    73.9    -      +       -      +
    248B  ARG*     1.3    57.6    +      -       -      +
    250B  GLN*     3.5    19.7    -      -       -      +
    251B  CME      2.9    36.1    +      -       -      -
    426B  GLU      4.0     4.0    +      -       -      -
    427B  THR*     3.6    16.1    -      -       +      -
    428B  SER*     2.9    48.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 248 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223B  GLU*     2.9    37.4    +      -       -      -
    228B  TRP*     3.7    44.7    -      -       -      +
    230B  GLN*     3.0    41.0    +      -       -      +
    232B  VAL*     3.8    18.8    -      -       -      +
    235B  LEU*     3.9    17.2    -      -       +      +
    244B  HIS*     3.0    26.3    +      -       +      +
    245B  VAL      3.1     8.5    +      -       -      +
    247B  TYR*     1.3    75.6    -      -       -      +
    249B  CYS*     1.3    60.4    +      -       -      +
    251B  CME      3.4     8.9    +      -       -      +
    252B  THR*     3.1    27.5    +      -       -      -
    501B  7U1      3.8    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 249 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245B  VAL*     2.9    31.1    +      -       -      -
    246B  PHE*     3.4     9.2    -      -       -      +
    248B  ARG*     1.3    73.6    -      -       -      +
    250B  GLN*     1.3    57.1    +      -       -      +
    252B  THR*     3.3     2.8    +      -       -      -
    253B  THR*     2.9    33.3    +      -       -      -
    328B  ILE*     4.8     9.6    -      -       -      -
    501B  7U1      3.5    77.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 250 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246B  PHE*     2.9    26.2    +      -       +      +
    247B  TYR*     3.5    22.4    -      -       -      +
    248B  ARG      3.3     0.2    -      -       -      -
    249B  CYS*     1.3    73.1    -      -       -      +
    251B  CME      1.3    76.7    +      -       -      +
    253B  THR*     3.3     1.4    +      -       -      -
    254B  VAL*     3.1    29.3    +      -       -      +
    417B  MET*     5.6     0.9    -      -       -      +
    428B  SER*     3.0    22.8    +      -       -      -
    429B  LEU*     3.5     7.6    -      -       -      +
    430B  HIS*     2.8    38.5    +      -       +      +
    433B  LEU*     3.5    19.3    -      -       +      +
    501B  7U1      3.8    16.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with CME 251 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229B  LYS*     5.0     6.1    +      -       -      -
    230B  GLN*     3.6    41.0    +      -       +      -
    234B  GLY      5.6     2.7    -      -       -      -
    235B  LEU*     3.2    34.1    -      -       +      -
    236B  PRO*     6.2     2.7    -      -       -      -
    247B  TYR*     2.9    16.7    +      -       -      +
    248B  ARG*     3.6     7.9    -      -       -      +
    250B  GLN*     1.3    91.6    +      -       -      +
    252B  THR*     1.3    61.5    +      -       -      +
    254B  VAL*     3.4    19.6    +      -       +      +
    255B  GLU*     3.0    26.5    +      -       -      +
    430B  HIS*     3.5    30.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 252 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248B  ARG*     3.1    17.5    +      -       -      -
    249B  CYS      3.8     4.0    -      -       -      -
    250B  GLN      3.3     0.2    -      -       -      -
    251B  CME      1.3    71.6    +      -       -      +
    253B  THR*     1.3    59.5    +      -       -      +
    255B  GLU*     3.4     6.5    +      -       +      +
    256B  THR*     2.8    40.0    +      -       -      +
    501B  7U1      3.4    44.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 253 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249B  CYS      2.9    20.0    +      -       -      -
    250B  GLN      3.5     6.1    -      -       -      -
    251B  CME      3.3     0.2    -      -       -      -
    252B  THR*     1.3    76.9    -      -       -      +
    254B  VAL*     1.3    58.5    +      -       -      +
    256B  THR*     3.1     6.5    +      -       -      -
    257B  VAL*     2.9    32.3    +      -       +      +
    287B  HIS*     4.1     8.5    -      -       +      +
    290B  ILE*     3.9    14.8    -      -       +      +
    291B  PHE*     6.1     0.2    -      -       -      -
    433B  LEU*     3.6    26.7    -      -       +      -
    501B  7U1      3.6    50.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 254 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274A  PHE*     3.8    25.1    -      -       +      -
    250B  GLN      3.1    16.7    +      -       -      +
    251B  CME      3.9    15.9    -      -       +      +
    253B  THR*     1.3    74.8    -      -       -      +
    255B  GLU*     1.3    63.2    +      -       -      +
    257B  VAL*     3.3    10.6    +      -       -      +
    258B  ARG*     3.2    23.3    +      -       +      +
    430B  HIS*     3.7    45.1    -      -       +      +
    432B  LEU*     4.2     5.8    -      -       +      -
    433B  LEU*     4.0    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 255 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229B  LYS*     3.3    42.8    +      -       +      +
    251B  CME      3.0    20.8    +      -       -      +
    252B  THR*     3.8     7.6    -      -       +      +
    254B  VAL*     1.3    77.6    -      -       -      +
    256B  THR*     1.3    61.6    +      -       -      +
    258B  ARG*     3.2    34.6    +      -       -      +
    259B  GLU*     3.3    33.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 256 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190B  PHE*     4.9     0.9    -      -       +      -
    252B  THR*     2.8    27.1    +      -       -      +
    253B  THR*     3.1     5.1    +      -       -      -
    255B  GLU*     1.3    74.9    -      -       -      +
    257B  VAL*     1.3    60.3    +      -       -      +
    259B  GLU*     3.1    18.8    +      -       -      +
    260B  LEU*     2.9    28.1    +      -       +      +
    290B  ILE*     3.6    28.4    -      -       +      +
    293B  MET*     3.6    23.6    -      -       +      -
    501B  7U1      5.1     2.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 257 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274A  PHE*     4.8     0.9    -      -       +      -
    501A  B7G      3.9    35.0    -      -       +      -
    253B  THR*     2.9    24.8    +      -       +      +
    254B  VAL*     3.5    11.0    -      -       -      +
    256B  THR*     1.3    76.0    -      -       -      +
    258B  ARG*     1.3    57.0    +      -       -      +
    260B  LEU*     3.5     7.6    +      -       -      +
    261B  THR*     2.9    33.9    +      -       -      +
    286B  VAL*     4.0    23.5    -      -       +      +
    287B  HIS*     6.0     0.2    -      -       +      -
    290B  ILE*     3.9    17.0    -      -       +      +
    432B  LEU*     4.0    14.6    -      -       +      -
    433B  LEU*     5.1     1.3    -      -       +      -
    436B  ILE*     4.7     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 258 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272A  SER*     4.1    22.6    +      -       -      +
    274A  PHE*     3.4    46.2    -      -       +      +
    254B  VAL*     3.2    15.2    +      -       -      +
    255B  GLU*     3.3    31.6    -      -       -      +
    256B  THR      3.1     0.8    -      -       -      -
    257B  VAL*     1.3    76.6    -      -       -      +
    259B  GLU*     1.3    61.5    +      -       +      +
    261B  THR*     3.4     7.5    +      -       -      -
    262B  GLU*     3.3    28.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 259 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  ASN*     3.5    25.1    -      -       -      +
    190B  PHE*     3.3    30.1    -      -       +      +
    191B  ASN*     3.4    24.3    +      -       -      +
    255B  GLU*     3.3    34.5    +      -       -      +
    256B  THR*     3.1    19.3    +      -       -      +
    258B  ARG*     1.3    75.9    -      -       +      +
    260B  LEU*     1.3    58.4    +      -       -      +
    262B  GLU*     3.1     7.7    +      -       -      +
    263B  PHE*     2.8    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 260 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190B  PHE*     3.8    15.0    -      -       +      -
    256B  THR      2.9    20.6    +      -       -      +
    257B  VAL      3.8     4.3    -      -       -      +
    258B  ARG      3.3     0.2    -      -       -      -
    259B  GLU*     1.3    74.9    -      -       -      +
    261B  THR*     1.3    59.0    +      -       -      +
    263B  PHE*     3.7     7.3    -      -       +      +
    264B  ALA*     2.9    32.2    +      -       -      +
    282B  LEU*     4.2     4.2    -      -       +      +
    286B  VAL*     3.9    23.8    -      -       +      +
    289B  ALA*     3.8    18.2    -      -       +      -
    290B  ILE*     3.9    17.3    -      -       +      -
    293B  MET*     3.7    22.7    -      -       +      -
    352B  ILE*     3.7    29.8    -      -       +      -
    356B  ILE*     4.7     7.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 261 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274A  PHE*     5.7     0.2    -      -       -      -
    275A  LEU*     4.1    22.9    -      -       +      +
    501A  B7G      3.7    22.2    -      -       +      +
    257B  VAL*     2.9    22.8    +      -       -      +
    258B  ARG*     3.7     7.3    -      -       -      -
    259B  GLU      3.2     0.4    -      -       -      -
    260B  LEU*     1.3    75.3    -      -       -      +
    262B  GLU*     1.3    71.8    +      -       -      +
    264B  ALA*     3.3     1.6    +      -       -      +
    265B  LYS*     3.0    41.7    +      -       -      +
    282B  LEU*     3.8    24.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 262 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  SER      5.2     4.9    -      -       -      +
    189B  ASN*     3.2    22.4    -      -       -      +
    258B  ARG      3.5    12.8    -      -       -      +
    259B  GLU*     3.1     6.9    +      -       -      +
    261B  THR*     1.3    87.8    -      -       -      +
    263B  PHE*     1.3    61.4    +      -       -      +
    265B  LYS*     3.5    17.6    +      -       -      +
    266B  SER*     2.9    28.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 263 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  ILE*     3.7    19.3    -      -       +      -
    185B  ALA*     3.8     7.6    -      -       +      -
    186B  TYR*     3.6    43.1    -      +       +      -
    189B  ASN*     3.8    12.0    -      -       +      +
    190B  PHE*     3.9    22.0    -      +       +      -
    259B  GLU      2.8    17.0    +      -       -      +
    260B  LEU*     3.7     7.9    -      -       +      +
    262B  GLU*     1.3    77.2    -      -       -      +
    264B  ALA*     1.3    67.8    +      -       +      +
    266B  SER*     3.0    17.2    +      -       -      -
    267B  ILE*     3.6    14.9    +      -       +      +
    349B  ALA*     3.5    24.0    -      -       -      -
    352B  ILE*     3.9    24.7    -      -       +      -
    353B  ALA*     4.0    16.4    -      -       +      -
    356B  ILE*     5.5     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 264 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  LEU      2.9    18.4    +      -       -      +
    261B  THR      3.7     3.4    -      -       -      +
    263B  PHE*     1.3    80.4    -      -       +      +
    265B  LYS*     1.3    58.4    +      -       -      +
    267B  ILE*     2.9    29.4    +      -       -      +
    270B  PHE*     3.2    52.2    -      -       +      +
    282B  LEU*     4.3    10.1    -      -       +      -
    356B  ILE*     4.4     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 265 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265A  LYS*     3.9    27.3    -      -       -      +
    275A  LEU*     3.6    28.6    -      -       -      +
    278A  GLN*     5.1     2.7    +      -       -      +
    261B  THR*     3.0    31.0    +      -       +      +
    262B  GLU*     3.8    21.3    -      -       -      +
    264B  ALA*     1.3    77.7    -      -       -      +
    266B  SER*     1.3    57.3    +      -       -      +
    267B  ILE      3.1     7.4    +      -       -      +
    268B  PRO*     4.9     1.0    -      -       -      +
    270B  PHE*     3.9    11.2    -      -       +      -
    271B  SER*     2.6    29.3    +      -       -      +
    275B  LEU*     3.9     1.2    -      -       -      +
    278B  GLN*     2.9    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 266 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181B  HIS*     3.1    26.5    +      -       -      -
    185B  ALA*     3.6    23.5    -      -       -      +
    188B  LYS*     5.7     5.0    +      -       -      +
    189B  ASN*     3.5    11.6    +      -       -      -
    262B  GLU      2.9    16.3    +      -       -      -
    263B  PHE      3.0    16.3    +      -       -      -
    265B  LYS*     1.3    75.4    -      -       -      +
    267B  ILE*     1.3    58.6    +      -       -      +
    268B  PRO*     3.9     1.3    -      -       -      -
----------------------------------------------------------
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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