Contacts of the helix formed by residues 219 - 244 (chain B) in PDB entry 4LML


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 SER 219 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  SER*     3.1    14.8    +      -       -      -
    218B  THR*     1.3    76.7    -      -       -      +
    220B  TYR*     1.3    65.5    +      -       -      +
    221B  GLU*     4.6     3.6    -      -       -      -
    222B  ALA*     3.5    18.4    -      -       -      +
    223B  ASN*     3.2    24.2    +      -       -      +
    275B  GLN*     5.4     0.2    -      -       -      -
    220E  TYR*     4.1     5.7    -      -       -      +
    221E  GLU*     5.9     1.3    -      -       -      +
    276E  HIS*     4.3     8.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  THR      3.7     4.0    +      -       -      -
    219B  SER*     1.3    71.6    -      -       -      +
    221B  GLU*     1.3    64.1    +      -       -      +
    223B  ASN*     2.9    21.1    +      -       +      +
    224B  VAL*     2.9    33.6    +      -       +      +
    272B  VAL*     3.8    22.2    -      -       +      -
    273B  THR*     3.3    25.7    +      -       -      +
    275B  GLN*     5.7     3.6    -      -       -      +
    276B  HIS*     3.5    44.9    -      +       +      +
    279B  LYS*     5.9     1.4    -      -       -      +
    213C  THR*     4.4    11.8    +      -       -      +
    214C  ALA*     5.2     2.0    -      -       -      -
    216C  TRP*     6.1     0.2    -      -       -      +
    217C  SER*     3.6    31.5    -      -       -      -
    219C  SER*     4.2     4.0    -      -       -      +
    222C  ALA*     3.7    25.4    -      -       +      -
    223C  ASN*     4.9     1.6    -      -       -      -
    226C  LEU*     5.2     2.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  SER*     3.4     4.0    -      -       -      -
    220B  TYR*     1.3    77.6    -      -       -      +
    222B  ALA*     1.3    62.1    +      -       -      +
    224B  VAL*     3.0    19.3    -      -       -      +
    225B  THR*     3.0    28.7    +      -       -      -
    219C  SER*     6.6     0.2    -      -       -      -
    221C  GLU*     3.4    29.5    -      -       +      +
    222C  ALA*     3.3    34.6    -      -       +      +
    225C  THR*     3.7     8.8    +      -       -      -
    221E  GLU*     3.1    38.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  SER*     3.5    22.3    +      -       -      +
    220B  TYR      3.4     0.6    -      -       -      -
    221B  GLU*     1.3    77.6    -      -       -      +
    223B  ASN*     1.3    59.9    +      -       -      +
    225B  THR*     3.5     1.0    +      -       -      -
    226B  LEU*     3.0    35.6    +      -       -      +
    220E  TYR*     3.6    29.8    -      -       +      -
    221E  GLU*     3.5    23.1    +      -       +      +
    224E  VAL*     4.3     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214B  ALA*     3.3    33.2    +      -       +      +
    217B  SER*     3.4    31.1    +      -       -      -
    219B  SER      3.2    14.8    +      -       -      +
    220B  TYR*     2.9    14.5    +      -       +      +
    222B  ALA*     1.3    79.5    -      -       -      +
    224B  VAL*     1.3    62.0    -      -       -      +
    226B  LEU      4.1     0.2    -      -       -      -
    227B  VAL*     3.2    28.2    +      -       -      +
    272B  VAL*     3.7    32.3    -      -       +      +
    275B  GLN*     3.8    14.8    +      -       -      +
    291B  THR*     6.4     0.4    -      -       -      +
    220E  TYR*     5.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220B  TYR*     2.9    45.8    +      -       +      +
    221B  GLU*     3.0    37.7    +      -       -      +
    223B  ASN*     1.3    75.7    -      -       -      +
    225B  THR*     1.3    66.7    +      -       -      +
    227B  VAL*     5.3     0.9    -      -       -      -
    228B  VAL*     3.0    33.1    +      -       +      +
    272B  VAL*     5.9     3.1    -      -       +      -
    222C  ALA*     4.5     3.6    -      -       +      +
    225C  THR*     3.9    17.3    -      -       +      -
    226C  LEU*     3.6    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  GLU*     3.0    19.4    +      -       -      -
    222B  ALA      3.8     3.8    -      -       -      -
    224B  VAL*     1.3    80.0    -      -       -      +
    226B  LEU*     1.3    65.2    +      -       +      +
    228B  VAL*     5.0     0.9    -      -       -      -
    229B  SER*     2.9    40.8    +      -       -      +
    225C  THR*     4.6    12.2    +      -       -      +
    221E  GLU*     3.4    16.7    +      -       -      +
    224E  VAL*     3.8    24.0    -      -       +      +
    225E  THR*     4.4    18.7    +      -       -      +
    228E  VAL*     5.1     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210B  ILE*     3.1    41.7    -      -       +      +
    211B  SER      4.3     2.5    -      -       -      +
    213B  THR*     3.7    18.6    -      -       +      -
    214B  ALA*     3.9    20.2    -      -       +      -
    222B  ALA*     3.0    23.0    +      -       +      +
    223B  ASN      4.1     0.9    -      -       -      +
    225B  THR*     1.3    77.8    -      -       +      +
    227B  VAL*     1.3    57.4    +      -       -      +
    229B  SER*     3.8     0.9    -      -       -      -
    230B  THR*     2.8    37.5    +      -       -      +
    220E  TYR*     5.2     3.1    -      -       +      +
    224E  VAL*     3.5    36.1    -      -       +      -
    228E  VAL*     4.4    11.8    -      -       +      +
    269E  VAL*     5.4     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211B  SER*     3.8    18.2    -      -       -      +
    212B  TRP*     5.8     0.4    -      -       -      -
    214B  ALA*     4.9     5.6    -      -       +      -
    215B  PHE*     6.1     2.5    -      -       +      -
    223B  ASN      3.2    20.2    +      -       -      +
    224B  VAL*     4.5     0.9    -      -       -      +
    226B  LEU*     1.3    75.4    -      -       +      +
    228B  VAL*     1.3    58.2    +      -       +      +
    230B  THR*     2.9    16.8    +      -       -      -
    231B  LEU*     3.0    17.4    +      -       +      +
    265B  TYR*     3.6    21.0    -      -       +      +
    268B  ALA*     4.2    15.9    -      -       +      -
    269B  VAL*     3.6    30.5    -      -       +      -
    272B  VAL*     4.7    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224B  VAL*     3.0    23.2    +      -       -      +
    225B  THR*     4.4     1.1    -      -       -      +
    227B  VAL*     1.3    78.0    -      -       +      +
    229B  SER*     1.3    63.1    +      -       -      +
    231B  LEU*     2.9    13.7    +      -       +      +
    232B  ALA*     2.9    28.1    +      -       +      +
    269B  VAL*     5.4     4.0    -      -       +      -
    210C  ILE*     5.0    11.4    -      -       +      -
    225C  THR*     5.2     5.4    -      -       +      +
    226C  LEU*     4.5    27.4    -      -       +      -
    229C  SER*     3.5    37.2    -      -       -      +
    230C  THR*     5.4     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225B  THR*     2.9    27.6    +      -       -      +
    226B  LEU      4.2     0.2    -      -       -      -
    228B  VAL*     1.3    80.6    -      -       -      +
    230B  THR*     1.3    60.8    +      -       -      +
    232B  ALA*     3.9     9.6    -      -       -      +
    233B  ALA*     3.7    16.1    +      -       -      +
    229C  SER*     5.5     1.6    +      -       -      -
    228E  VAL*     3.3    32.2    -      -       -      +
    229E  SER*     5.4     2.3    +      -       -      -
    232E  ALA*     6.0     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  ILE*     3.2    35.6    -      -       +      +
    210B  ILE*     3.9    17.3    -      -       +      -
    211B  SER*     3.4    19.1    -      -       -      +
    226B  LEU*     2.8    25.8    +      -       +      +
    227B  VAL*     2.9    13.9    +      -       -      -
    229B  SER*     1.3    76.5    -      -       -      +
    231B  LEU*     1.3    59.2    +      -       -      +
    232B  ALA      3.2     0.4    -      -       -      -
    233B  ALA*     3.2     5.7    +      -       -      +
    234B  HIS      2.9    23.9    +      -       -      -
    265B  TYR*     3.1    19.2    +      -       -      -
    228E  VAL*     5.3     4.7    -      -       +      -
    231E  LEU*     6.2     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227B  VAL*     3.0    15.9    +      -       +      +
    228B  VAL*     2.9    17.5    +      -       +      +
    230B  THR*     1.3    76.6    -      -       -      +
    232B  ALA*     1.3    56.8    +      -       -      +
    234B  HIS*     3.1     2.8    +      -       +      +
    235B  ILE*     2.9    40.3    +      -       +      +
    262B  TYR*     3.9    27.4    -      -       +      -
    265B  TYR*     3.1    35.6    -      -       +      -
    269B  VAL*     5.9     1.6    -      -       +      -
    206C  PHE*     6.3     0.4    -      -       +      -
    207C  ILE*     3.9    25.4    -      -       +      -
    210C  ILE*     4.4    24.7    -      -       +      -
    230C  THR*     5.9     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228B  VAL*     2.9    16.3    +      -       +      +
    229B  SER*     3.9    10.8    -      -       -      +
    230B  THR      3.2     0.2    -      -       -      -
    231B  LEU*     1.3    76.0    -      -       -      +
    233B  ALA*     1.3    57.2    +      -       -      +
    235B  ILE*     3.1    15.0    +      -       -      +
    236B  ALA*     2.9    27.8    +      -       -      +
    229C  SER      5.9     2.7    -      -       -      +
    233C  ALA*     6.0     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 233 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  ILE*     3.8    17.7    -      -       +      -
    229B  SER      3.7    10.5    +      -       -      +
    230B  THR*     3.2     9.9    +      -       -      +
    232B  ALA*     1.3    77.7    -      -       -      +
    234B  HIS*     1.3    58.0    +      -       -      +
    236B  ALA*     3.1     9.8    +      -       -      +
    237B  PHE*     2.9    33.4    +      -       +      -
    232E  ALA*     6.0     1.8    -      -       +      -
    235E  ILE*     3.6    29.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 234 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204B  MET*     3.9    15.2    -      -       -      +
    207B  ILE*     3.3    13.1    -      -       +      +
    230B  THR      2.9    13.1    +      -       -      +
    231B  LEU*     3.5     7.9    -      -       +      +
    232B  ALA      3.1     0.2    -      -       -      -
    233B  ALA*     1.3    75.6    -      -       -      +
    235B  ILE*     1.3    60.3    +      -       -      +
    237B  PHE*     3.5     3.5    +      -       -      +
    238B  ASN*     2.9    24.1    +      -       -      +
    258B  ILE*     3.0    43.7    +      -       +      +
    261B  ILE*     3.3    35.7    -      -       +      +
    262B  TYR*     3.4    37.7    +      +       -      -
    265B  TYR*     3.9    15.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with ILE 235 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231B  LEU*     2.9    34.9    +      -       +      +
    232B  ALA*     3.5     9.2    -      -       -      +
    234B  HIS*     1.3    75.4    -      -       -      +
    236B  ALA*     1.3    57.8    +      -       -      +
    238B  ASN*     3.2     3.2    -      -       +      +
    239B  ILE*     2.9    42.5    +      -       +      +
    262B  TYR*     3.0    33.0    -      -       +      +
    207C  ILE*     4.0    13.9    -      -       +      -
    233C  ALA*     3.8    29.4    -      -       +      +
    236C  ALA*     5.7     3.1    -      -       +      -
    237C  PHE*     3.7    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 236 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232B  ALA      2.9    12.7    +      -       -      +
    233B  ALA*     3.2    15.0    -      -       -      +
    235B  ILE*     1.3    76.0    -      -       -      +
    237B  PHE*     1.3    58.9    +      -       +      +
    239B  ILE*     3.2    11.2    +      -       -      +
    240B  LEU*     2.9    28.2    +      -       -      +
    235E  ILE*     5.3     5.2    -      -       +      -
    239E  ILE*     5.3    13.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 237 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199B  ASN      3.5    21.5    -      -       -      -
    200B  ILE*     4.3    27.8    -      -       +      -
    203B  PRO*     3.6    24.5    -      -       +      -
    204B  MET*     4.4    23.3    -      -       +      -
    207B  ILE*     4.3    18.8    -      -       +      -
    233B  ALA      2.9    32.0    +      -       -      +
    234B  HIS      3.8     4.0    -      -       -      +
    236B  ALA*     1.3    68.9    -      -       -      +
    238B  ASN*     1.3    66.2    +      -       -      +
    240B  LEU*     3.1    14.4    +      -       +      +
    241B  VAL*     2.9    29.2    +      -       +      +
    258B  ILE*     5.8     1.3    -      -       -      -
    235E  ILE*     4.0    30.7    -      -       +      -
    238E  ASN*     5.2     2.9    -      -       -      -
    239E  ILE*     5.3     1.5    -      -       +      +
    262E  TYR*     3.7    13.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 238 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234B  HIS*     2.9    18.0    +      -       +      +
    235B  ILE      3.2    11.5    +      -       -      +
    237B  PHE*     1.3    75.5    -      -       -      +
    239B  ILE*     1.3    62.1    +      -       -      +
    241B  VAL*     4.0     2.8    -      -       -      +
    242B  GLU*     2.9    50.0    +      -       -      +
    258B  ILE*     3.6    29.5    -      -       +      +
    262B  TYR*     3.7    23.9    +      -       +      +
    198C  PRO      4.5     2.3    -      -       -      +
    199C  ASN*     3.5    32.0    +      -       -      +
    237C  PHE*     4.8     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 239 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235B  ILE*     2.9    32.7    +      -       +      +
    236B  ALA*     3.6     9.4    -      -       -      +
    237B  PHE      3.2     0.2    -      -       -      -
    238B  ASN*     1.3    79.9    -      -       -      +
    240B  LEU*     1.3    60.3    +      -       -      +
    242B  GLU*     3.3    16.2    +      -       -      +
    243B  THR*     2.9    44.4    +      -       -      +
    236C  ALA*     4.8    17.7    -      -       +      +
    237C  PHE*     5.4     5.8    -      -       +      +
    240C  LEU*     4.2    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 240 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200B  ILE*     3.6    31.2    -      -       +      -
    236B  ALA      2.9    13.6    +      -       -      +
    237B  PHE*     3.1    17.2    +      -       +      +
    239B  ILE*     1.3    78.4    -      -       -      +
    241B  VAL*     1.3    60.2    +      -       -      +
    243B  THR*     3.6    15.0    +      -       +      -
    244B  ASN*     4.0    13.9    +      -       -      +
    239E  ILE*     3.7    46.4    -      -       +      -
    242E  GLU*     4.2    13.2    -      -       -      +
    243E  THR*     5.3     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 241 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  TYR*     4.1    31.0    +      -       +      +
    200B  ILE*     3.7    39.9    -      -       +      -
    237B  PHE      2.9    19.1    +      -       -      +
    238B  ASN*     4.1     2.5    -      -       -      +
    240B  LEU*     1.3    74.1    -      -       +      +
    242B  GLU*     1.3    63.2    +      -       -      +
    243B  THR      3.1     5.6    +      -       -      -
    244B  ASN*     3.4    13.2    +      -       -      +
    245B  LEU*     3.9    15.9    +      -       +      +
    254B  THR*     5.2    10.8    -      -       +      -
    258B  ILE*     5.3    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 242 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238B  ASN*     2.9    37.2    +      -       -      +
    239B  ILE*     3.6    10.3    -      -       -      +
    241B  VAL*     1.3    75.7    -      -       -      +
    243B  THR*     1.3    62.3    +      -       -      +
    245B  LEU*     3.5    17.2    -      -       -      +
    247B  LYS*     3.6    27.3    +      -       -      +
    199C  ASN*     4.0    28.9    -      -       -      +
    200C  ILE*     3.6    23.3    -      -       -      +
    240C  LEU*     3.7    17.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 243 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  LYS*     3.7    22.9    +      -       -      +
    239B  ILE*     2.9    27.6    +      -       -      +
    240B  LEU*     3.7     9.6    -      -       +      +
    241B  VAL      3.1     0.6    -      -       -      -
    242B  GLU*     1.3    81.5    -      -       -      +
    244B  ASN*     1.3    72.2    +      -       -      +
    245B  LEU      3.2     4.8    +      -       -      +
    240C  LEU*     5.2     6.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 244 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  ASP*     3.9    11.1    -      -       -      +
     32B  LYS*     3.7    15.5    +      -       -      +
    118B  TYR*     5.3     5.8    -      -       -      +
    240B  LEU*     4.0    12.2    +      -       -      +
    241B  VAL*     3.4     8.5    +      -       -      +
    243B  THR*     1.3    91.8    -      -       -      +
    245B  LEU*     1.3    70.1    +      -       +      +
----------------------------------------------------------
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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