Contacts of the helix formed by residues 219 - 244 (chain D) 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 D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  TYR*     4.0     1.4    -      -       -      +
    221A  GLU*     6.2     0.9    -      -       -      -
    276A  HIS*     3.8    15.8    +      -       -      -
    217D  SER*     2.9    16.7    +      -       -      -
    218D  THR*     1.3    76.9    -      -       -      +
    220D  TYR*     1.3    65.7    +      -       -      +
    221D  GLU*     4.7     3.1    -      -       -      -
    222D  ALA*     3.5    18.7    -      -       -      +
    223D  ASN*     3.0    23.6    +      -       -      +
    275D  GLN*     5.6     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 220 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218D  THR      3.6     4.4    +      -       -      -
    219D  SER*     1.3    72.2    -      -       -      +
    221D  GLU*     1.3    64.3    +      -       -      +
    223D  ASN*     3.1     6.2    +      -       +      +
    224D  VAL*     2.9    44.5    +      -       +      +
    272D  VAL*     3.5    33.2    -      -       +      -
    273D  THR*     3.4    25.2    +      -       -      +
    275D  GLN*     6.1     2.7    -      -       -      +
    276D  HIS*     3.4    42.2    -      +       +      +
    279D  LYS*     5.8     1.5    -      -       -      +
    213E  THR*     5.1     6.9    +      -       -      +
    214E  ALA*     5.8     0.9    -      -       -      -
    216E  TRP      5.7     0.9    -      -       -      -
    217E  SER*     3.2    36.8    -      -       -      -
    219E  SER*     4.0     5.4    -      -       -      +
    222E  ALA*     4.0    20.4    -      -       +      -
    223E  ASN*     5.2     0.2    -      -       -      -
    226E  LEU*     5.7     3.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 221 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  GLU*     2.8    38.4    -      -       +      +
    221C  GLU*     4.9     1.2    -      -       -      +
    219D  SER*     3.4     3.1    -      -       -      -
    220D  TYR*     1.3    79.5    -      -       -      +
    222D  ALA*     1.3    62.3    +      -       -      +
    224D  VAL*     3.0    13.2    -      -       -      +
    225D  THR*     3.0    29.4    +      -       -      -
    219E  SER*     6.2     1.3    -      -       -      -
    221E  GLU*     3.4    32.7    -      -       +      +
    222E  ALA*     3.5    30.2    -      -       +      +
    225E  THR*     3.7     9.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 222 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  TYR*     3.6    28.0    -      -       +      -
    221A  GLU*     3.1    29.3    +      -       +      +
    224A  VAL*     4.4     3.6    -      -       +      -
    219D  SER*     3.5    22.3    +      -       -      +
    220D  TYR      3.4     0.4    -      -       -      -
    221D  GLU*     1.3    79.4    -      -       -      +
    223D  ASN*     1.3    58.9    +      -       -      +
    225D  THR*     3.5     1.0    +      -       -      -
    226D  LEU*     3.0    36.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 223 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  TYR*     4.6     0.9    -      -       -      -
    214D  ALA*     3.3    24.2    +      -       +      +
    217D  SER*     2.8    50.7    +      -       -      -
    219D  SER      3.0    18.2    +      -       -      +
    220D  TYR*     3.1     7.3    +      -       -      +
    222D  ALA*     1.3    78.5    -      -       -      +
    224D  VAL*     1.3    61.6    +      -       -      +
    226D  LEU*     3.9     1.2    -      -       -      +
    227D  VAL*     3.2    30.5    +      -       -      +
    272D  VAL*     3.7    30.0    -      -       +      +
    275D  GLN*     4.2     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 224 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220D  TYR*     2.9    49.3    +      -       +      +
    221D  GLU*     3.0    35.7    -      -       -      +
    223D  ASN*     1.3    78.7    -      -       -      +
    225D  THR*     1.3    65.8    +      -       -      +
    227D  VAL*     3.5     2.4    +      -       -      -
    228D  VAL*     3.0    31.9    +      -       +      +
    269D  VAL*     6.5     0.9    -      -       -      -
    272D  VAL*     5.2     5.8    -      -       +      -
    222E  ALA*     4.3     7.4    -      -       +      +
    225E  THR*     4.5     5.8    -      -       +      -
    226E  LEU*     3.7    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 225 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  GLU*     3.3    22.7    +      -       -      +
    224A  VAL*     3.8    22.0    -      -       +      +
    225A  THR*     4.6    14.1    +      -       -      +
    228A  VAL*     5.4     3.1    -      -       +      -
    221D  GLU*     3.0    21.4    +      -       -      -
    222D  ALA      3.7     1.8    -      -       -      -
    224D  VAL*     1.3    77.0    -      -       -      +
    226D  LEU*     1.3    64.3    +      -       -      +
    228D  VAL*     4.8     2.9    -      -       -      -
    229D  SER*     2.9    35.9    +      -       -      +
    225E  THR*     4.4    13.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 226 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  TYR*     4.9     2.7    -      -       +      +
    224A  VAL*     3.4    35.9    -      -       +      -
    228A  VAL*     4.4    12.5    -      -       +      +
    269A  VAL*     5.3     1.8    -      -       +      -
    210D  ILE*     3.1    43.5    -      -       +      +
    211D  SER*     4.1     8.1    -      -       -      +
    213D  THR*     3.9    18.4    -      -       +      -
    214D  ALA*     4.3     7.9    -      -       +      -
    222D  ALA      3.0    26.9    +      -       -      +
    223D  ASN      3.9     6.7    -      -       -      +
    224D  VAL      3.2     0.2    -      -       -      -
    225D  THR*     1.3    77.8    -      -       -      +
    227D  VAL*     1.3    57.6    +      -       -      +
    229D  SER*     3.8     1.2    -      -       -      -
    230D  THR*     2.8    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 227 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211D  SER*     4.0    17.5    -      -       -      +
    214D  ALA*     4.9     4.3    -      -       +      -
    223D  ASN      3.2    19.3    +      -       -      +
    224D  VAL*     3.5     4.0    +      -       -      +
    226D  LEU*     1.3    74.7    -      -       +      +
    228D  VAL*     1.3    58.9    +      -       +      +
    230D  THR*     2.9    16.5    +      -       -      -
    231D  LEU*     3.0    19.4    +      -       +      +
    265D  TYR*     3.9    25.9    -      -       +      +
    268D  ALA*     4.4    12.6    -      -       +      -
    269D  VAL*     3.4    34.3    -      -       +      +
    272D  VAL*     4.7    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 228 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224D  VAL*     3.0    22.7    +      -       -      +
    225D  THR*     4.1     2.5    -      -       -      +
    227D  VAL*     1.3    79.9    -      -       +      +
    229D  SER*     1.3    66.5    +      -       -      +
    231D  LEU*     3.1     7.7    +      -       +      +
    232D  ALA*     3.0    30.3    +      -       +      +
    269D  VAL*     5.6     4.0    -      -       +      -
    210E  ILE*     5.2     8.7    -      -       +      -
    225E  THR*     5.1     6.3    -      -       +      +
    226E  LEU*     4.7    28.5    -      -       +      +
    229E  SER*     3.4    38.4    -      -       -      +
    230E  THR*     5.5     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 229 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228A  VAL*     3.3    32.4    -      -       -      +
    229A  SER*     5.2     2.6    +      -       -      -
    232A  ALA*     5.9     3.1    -      -       -      +
    225D  THR*     2.9    26.2    +      -       -      +
    226D  LEU      4.2     0.7    -      -       -      -
    228D  VAL*     1.3    81.9    -      -       -      +
    230D  THR*     1.3    61.5    +      -       -      +
    232D  ALA*     4.2     6.8    -      -       -      +
    233D  ALA*     4.0    14.7    +      -       -      +
    229E  SER*     5.7     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 230 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228A  VAL*     5.2     5.2    -      -       +      -
    231A  LEU*     6.1     2.0    -      -       +      -
    207D  ILE*     3.4    42.2    -      -       +      +
    210D  ILE*     4.1    15.5    -      -       +      -
    211D  SER*     3.2    26.8    -      -       -      +
    226D  LEU*     2.8    22.7    +      -       +      +
    227D  VAL      2.9    12.6    +      -       -      -
    229D  SER*     1.3    79.4    -      -       -      +
    231D  LEU*     1.3    62.6    +      -       -      +
    232D  ALA      3.3     0.2    -      -       -      -
    233D  ALA*     3.4     2.8    +      -       -      +
    234D  HIS*     3.0    22.0    +      -       -      +
    265D  TYR*     3.3     6.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 231 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227D  VAL*     3.0    22.3    +      -       +      +
    228D  VAL*     3.1     7.6    +      -       +      +
    230D  THR*     1.3    76.2    +      -       -      +
    232D  ALA*     1.3    57.3    +      -       -      +
    234D  HIS*     3.1     7.6    +      -       -      +
    235D  ILE*     2.9    35.3    +      -       +      +
    262D  TYR*     4.2    25.8    -      -       +      -
    265D  TYR*     3.3    38.6    -      -       +      -
    269D  VAL*     6.0     0.4    -      -       +      -
    206E  PHE*     6.4     0.2    -      -       +      -
    207E  ILE*     4.6    16.8    -      -       +      -
    210E  ILE*     3.9    29.6    -      -       +      -
    230E  THR*     6.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 232 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228D  VAL*     3.0    17.3    +      -       +      +
    229D  SER*     4.3     8.7    -      -       -      +
    231D  LEU*     1.3    76.5    -      -       -      +
    233D  ALA*     1.3    62.6    +      -       -      +
    235D  ILE*     3.2    15.0    +      -       -      +
    236D  ALA*     3.0    20.7    +      -       -      +
    229E  SER      5.6     5.8    -      -       -      +
    233E  ALA*     5.6     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 233 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232A  ALA*     5.7     5.8    -      -       +      -
    235A  ILE*     3.8    30.1    -      -       +      -
    207D  ILE*     4.1     7.6    -      -       +      -
    229D  SER      4.0    10.6    +      -       -      +
    230D  THR*     3.4     8.8    +      -       -      +
    232D  ALA*     1.3    79.0    -      -       -      +
    234D  HIS*     1.3    58.0    +      -       -      +
    236D  ALA*     3.1    10.9    +      -       +      +
    237D  PHE*     2.9    35.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 234 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204D  MET*     3.7    25.5    -      -       +      -
    207D  ILE*     3.7    12.3    -      -       +      +
    208D  LEU*     6.1     0.2    -      -       +      -
    230D  THR      3.0    14.5    +      -       -      +
    231D  LEU*     3.1    24.0    +      -       -      +
    233D  ALA*     1.3    74.1    -      -       -      +
    235D  ILE*     1.3    60.8    +      -       -      +
    237D  PHE*     3.4     7.2    +      -       -      +
    238D  ASN*     2.9    24.3    +      -       -      +
    258D  ILE*     3.7    34.2    -      -       +      +
    261D  ILE*     3.1    37.1    -      -       +      +
    262D  TYR*     4.1    20.1    -      +       -      -
    265D  TYR*     4.1     9.8    -      +       -      +
----------------------------------------------------------
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Residues in contact with ILE 235 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231D  LEU*     2.9    29.3    +      -       +      +
    232D  ALA*     3.5     7.6    -      -       -      +
    234D  HIS*     1.3    72.5    -      -       -      +
    236D  ALA*     1.3    60.9    +      -       -      +
    238D  ASN*     3.1     2.1    +      -       +      +
    239D  ILE*     2.9    42.4    +      -       +      +
    262D  TYR*     3.1    36.1    -      -       +      +
    207E  ILE*     3.9    27.6    -      -       +      -
    233E  ALA*     4.1    21.1    -      -       +      +
    236E  ALA*     6.0     2.0    -      -       +      -
    237E  PHE*     3.5    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 236 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  ILE*     5.9     2.7    -      -       +      -
    239A  ILE*     5.2    13.1    -      -       +      +
    232D  ALA      3.0    13.1    +      -       -      +
    233D  ALA*     3.2    14.8    -      -       -      +
    235D  ILE*     1.3    78.1    -      -       -      +
    237D  PHE*     1.3    57.3    +      -       +      +
    239D  ILE*     3.3     9.7    +      -       -      +
    240D  LEU*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 237 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  ILE*     3.6    41.5    -      -       +      -
    238A  ASN*     4.9     1.6    -      -       -      -
    239A  ILE*     4.8    10.5    -      -       +      -
    262A  TYR*     3.8    14.4    -      -       -      -
    199D  ASN      3.7    18.8    -      -       -      -
    200D  ILE*     4.0    33.2    -      -       +      -
    203D  PRO*     3.9    14.6    -      -       +      -
    204D  MET*     4.5    24.9    -      -       +      -
    207D  ILE*     4.6     9.4    -      -       +      -
    233D  ALA      2.9    27.2    +      -       -      -
    234D  HIS*     3.6     9.6    -      -       -      +
    236D  ALA*     1.3    72.7    -      -       -      +
    238D  ASN*     1.3    65.4    +      -       -      +
    240D  LEU*     3.1    11.3    +      -       +      +
    241D  VAL*     2.9    28.0    +      -       -      +
    258D  ILE*     4.9     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 238 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234D  HIS      2.9    14.6    +      -       -      +
    235D  ILE      3.1     8.9    +      -       -      +
    237D  PHE*     1.3    75.0    -      -       -      +
    239D  ILE*     1.3    61.9    +      -       -      +
    241D  VAL*     3.8     1.7    -      -       -      +
    242D  GLU*     2.9    57.8    +      -       -      +
    258D  ILE*     3.4    44.2    -      -       +      +
    262D  TYR*     3.8    25.5    +      -       +      +
    198E  PRO      4.9     1.0    -      -       -      +
    199E  ASN*     4.0    24.8    +      -       -      +
    237E  PHE*     5.0     2.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 239 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235D  ILE*     2.9    32.5    +      -       +      +
    236D  ALA*     3.5    11.7    -      -       -      +
    238D  ASN*     1.3    76.9    -      -       -      +
    240D  LEU*     1.3    67.8    +      -       -      +
    242D  GLU*     3.9     9.5    -      -       -      +
    243D  THR*     2.9    38.8    +      -       -      +
    236E  ALA*     4.8    17.3    -      -       +      +
    237E  PHE*     4.9     8.5    -      -       +      +
    240E  LEU*     3.6    39.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 240 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239A  ILE*     3.7    44.2    -      -       +      -
    242A  GLU*     4.1     8.7    -      -       -      +
    243A  THR*     4.9     7.4    -      -       -      +
    200D  ILE*     3.8    29.2    -      -       +      -
    236D  ALA      2.9    15.0    +      -       -      +
    237D  PHE*     3.1    12.3    +      -       +      +
    239D  ILE*     1.3    78.3    -      -       -      +
    241D  VAL*     1.3    62.2    +      -       +      +
    243D  THR*     3.7     7.3    -      -       +      -
    244D  ASN*     3.7    26.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 241 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118D  TYR*     4.5    22.7    -      -       +      +
    200D  ILE*     4.1    34.5    -      -       +      -
    204D  MET*     6.5     0.2    -      -       -      -
    237D  PHE*     2.9    20.8    +      -       +      +
    238D  ASN*     3.8     4.9    -      -       -      +
    240D  LEU*     1.3    74.4    -      -       +      +
    242D  GLU*     1.3    62.8    +      -       -      +
    243D  THR      3.0     5.4    +      -       -      -
    244D  ASN*     3.3    13.9    +      -       -      +
    245D  LEU*     3.4    22.0    +      -       +      +
    254D  THR*     4.8    16.8    -      -       +      -
    258D  ILE*     5.1     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 242 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238D  ASN*     2.9    39.7    +      -       -      +
    239D  ILE*     3.9     7.4    -      -       -      +
    241D  VAL*     1.3    73.1    -      -       -      +
    243D  THR*     1.3    57.8    +      -       -      +
    245D  LEU*     3.0    25.0    -      -       -      +
    247D  LYS*     3.0    34.4    +      -       -      +
    199E  ASN*     3.6    25.2    -      -       -      +
    200E  ILE*     3.3    27.9    -      -       -      +
    240E  LEU*     4.2    12.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 243 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32D  LYS*     3.1    32.5    +      -       -      +
    239D  ILE*     2.9    30.2    +      -       -      +
    240D  LEU*     3.7     8.3    -      -       +      +
    241D  VAL      3.0     0.2    -      -       -      -
    242D  GLU*     1.3    75.4    -      -       -      +
    244D  ASN*     1.3    72.5    +      -       -      +
    245D  LEU      3.1     7.6    +      -       -      -
    240E  LEU*     4.3    13.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 244 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31D  ASP*     4.1    11.4    -      -       -      +
     32D  LYS*     3.6    15.1    -      -       -      +
    118D  TYR*     5.5     6.1    -      -       -      +
    240D  LEU*     3.7    17.4    +      -       -      +
    241D  VAL*     3.3     6.7    +      -       -      +
    243D  THR*     1.3    92.4    -      -       -      +
    245D  LEU*     1.3    68.5    +      -       +      +
----------------------------------------------------------
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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