Contacts of the helix formed by residues 219 - 244 (chain A) 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 A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217A  SER*     3.0    16.4    +      -       -      -
    218A  THR*     1.3    76.0    -      -       -      +
    220A  TYR*     1.3    62.3    +      -       -      +
    221A  GLU*     4.8     2.0    -      -       -      -
    222A  ALA*     3.3    21.0    -      -       -      +
    223A  ASN*     3.0    27.9    +      -       -      +
    220C  TYR*     3.9     6.0    -      -       -      +
    221C  GLU*     6.1     1.8    -      -       -      -
    276C  HIS*     4.5     9.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 220 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  THR      3.6     4.2    +      -       -      -
    219A  SER*     1.3    69.2    -      -       -      +
    221A  GLU*     1.3    66.1    +      -       -      +
    223A  ASN*     2.9     7.0    +      -       +      +
    224A  VAL*     2.9    44.4    +      -       +      +
    272A  VAL*     3.4    31.4    -      -       +      -
    273A  THR*     2.9    33.7    +      -       +      +
    275A  GLN*     5.1     4.2    -      -       -      +
    276A  HIS*     3.4    44.2    -      +       +      +
    279A  LYS*     5.6     3.2    -      -       -      +
    213D  THR*     4.2     9.2    +      -       -      +
    214D  ALA*     5.2     1.2    -      -       -      -
    217D  SER*     3.4    30.6    -      -       -      -
    219D  SER*     4.0     1.6    -      -       -      +
    222D  ALA*     3.6    28.7    -      -       +      -
    223D  ASN*     4.6     1.1    -      -       -      -
    226D  LEU*     4.9     2.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 221 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  SER*     3.5     2.1    -      -       -      -
    220A  TYR*     1.3    77.9    -      -       -      +
    222A  ALA*     1.3    62.8    +      -       -      +
    224A  VAL*     3.1    22.7    -      -       -      +
    225A  THR*     3.0    31.0    +      -       -      -
    221C  GLU*     3.5    30.4    -      -       +      +
    219D  SER*     6.2     0.7    -      -       -      -
    221D  GLU*     2.8    33.5    -      -       +      +
    222D  ALA*     3.1    37.9    -      -       +      +
    225D  THR*     3.3    12.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 222 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  SER*     3.3    24.4    +      -       -      +
    220A  TYR      3.3     0.8    -      -       -      -
    221A  GLU*     1.3    78.8    -      -       -      +
    223A  ASN*     1.3    59.6    +      -       -      +
    225A  THR*     3.4     1.7    -      -       -      -
    226A  LEU*     2.9    35.0    +      -       -      +
    220C  TYR*     3.9    24.0    -      -       +      -
    221C  GLU*     3.2    25.6    +      -       +      +
    224C  VAL*     4.2     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 223 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  ALA*     3.3    40.2    +      -       +      +
    217A  SER*     3.4    25.1    +      -       -      -
    219A  SER      3.0    19.9    +      -       -      +
    220A  TYR*     2.9     7.3    +      -       -      +
    222A  ALA*     1.3    79.7    -      -       -      +
    224A  VAL*     1.3    61.9    +      -       -      +
    226A  LEU*     3.9     1.1    -      -       -      +
    227A  VAL*     3.2    29.5    +      -       -      +
    272A  VAL*     3.5    27.6    -      -       +      +
    275A  GLN*     3.5    17.2    -      -       -      +
    220C  TYR*     5.0     1.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 224 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  TYR*     2.9    48.6    +      -       +      +
    221A  GLU*     3.1    38.8    -      -       -      +
    223A  ASN*     1.3    75.9    -      -       -      +
    225A  THR*     1.3    66.5    +      -       -      +
    227A  VAL*     5.2     1.3    -      -       -      -
    228A  VAL*     3.0    32.7    +      -       -      +
    269A  VAL*     6.1     1.6    -      -       +      -
    272A  VAL*     5.3     4.3    -      -       +      -
    222D  ALA*     4.3     2.5    -      -       +      +
    225D  THR*     3.8    15.5    -      -       +      -
    226D  LEU*     3.4    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 225 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  GLU*     3.0    22.6    +      -       -      -
    222A  ALA      3.4     8.3    -      -       -      -
    224A  VAL*     1.3    79.7    -      -       -      +
    226A  LEU*     1.3    59.0    +      -       +      +
    228A  VAL*     4.9     0.9    -      -       -      -
    229A  SER*     2.9    46.9    +      -       -      +
    221C  GLU*     3.5     9.5    +      -       -      -
    224C  VAL*     3.6    29.4    -      -       +      +
    225C  THR*     4.5    14.8    +      -       -      +
    228C  VAL*     5.1     4.3    -      -       +      -
    225D  THR*     4.6    10.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 226 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  ILE*     3.2    45.3    -      -       +      +
    211A  SER      4.1     7.6    -      -       -      +
    213A  THR*     4.2    12.3    -      -       +      -
    214A  ALA*     4.2    12.6    -      -       +      -
    222A  ALA      2.9    21.9    +      -       -      +
    223A  ASN*     4.1     4.7    -      -       -      +
    224A  VAL      3.3     0.4    -      -       -      -
    225A  THR*     1.3    78.5    -      -       +      +
    227A  VAL*     1.3    55.7    +      -       -      +
    229A  SER*     3.9     0.3    -      -       -      -
    230A  THR*     2.5    41.6    +      -       +      +
    220C  TYR*     5.3     3.4    -      -       +      +
    224C  VAL*     3.5    34.3    -      -       +      -
    228C  VAL*     4.4    11.9    -      -       +      -
    269C  VAL*     5.7     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 227 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  SER*     3.8    22.4    -      -       -      +
    212A  TRP*     5.8     0.2    -      -       -      -
    214A  ALA*     5.0     2.9    -      -       +      -
    215A  PHE*     6.4     0.9    -      -       +      -
    223A  ASN      3.2    19.5    +      -       -      +
    224A  VAL*     4.6     0.9    -      -       -      +
    226A  LEU*     1.3    74.4    -      -       +      +
    228A  VAL*     1.3    57.9    +      -       -      +
    230A  THR*     2.9    17.3    +      -       -      -
    231A  LEU*     2.9    20.4    +      -       +      +
    265A  TYR*     3.4    31.0    -      -       +      +
    268A  ALA*     3.6    21.3    -      -       +      -
    269A  VAL*     3.5    18.4    -      -       +      -
    272A  VAL*     4.5    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 228 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224A  VAL*     3.0    25.8    +      -       +      +
    225A  THR*     4.2     0.9    -      -       -      +
    227A  VAL*     1.3    78.0    -      -       -      +
    229A  SER*     1.3    63.6    +      -       -      +
    231A  LEU*     3.0    12.4    +      -       +      +
    232A  ALA*     2.9    28.4    +      -       +      +
    269A  VAL*     4.7     6.5    -      -       +      -
    210D  ILE*     4.6    11.7    -      -       +      -
    225D  THR*     5.4     4.3    -      -       +      +
    226D  LEU*     4.4    26.9    -      -       +      -
    229D  SER*     3.3    39.7    -      -       -      +
    230D  THR*     5.2     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 229 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225A  THR*     2.9    25.3    +      -       -      +
    226A  LEU      4.4     0.4    -      -       -      -
    228A  VAL*     1.3    81.7    -      -       -      +
    230A  THR*     1.3    60.1    -      -       -      +
    232A  ALA*     4.0    10.1    -      -       -      +
    233A  ALA*     3.8    16.3    +      -       -      +
    228C  VAL*     3.3    32.4    -      -       -      +
    229C  SER*     5.6     1.0    +      -       -      -
    232C  ALA*     6.1     0.7    -      -       -      +
    229D  SER*     5.2     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 230 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  ILE*     3.2    44.5    -      -       +      +
    210A  ILE*     4.0    15.7    -      -       +      -
    211A  SER*     3.1    19.5    -      -       -      +
    226A  LEU*     2.5    27.8    +      -       +      +
    227A  VAL      2.9    12.0    +      -       -      -
    229A  SER*     1.3    76.1    -      -       -      +
    231A  LEU*     1.3    58.5    +      -       -      +
    232A  ALA      3.2     0.2    -      -       -      -
    233A  ALA*     3.3     4.8    +      -       -      -
    234A  HIS*     3.0    24.3    +      -       -      +
    265A  TYR*     3.1    12.0    -      -       -      -
    228C  VAL*     5.2     5.4    -      -       +      -
    231C  LEU*     6.3     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 231 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227A  VAL      2.9    20.6    +      -       -      +
    228A  VAL*     3.2    11.9    -      -       +      +
    230A  THR*     1.3    73.6    -      -       -      +
    232A  ALA*     1.3    59.9    +      -       -      +
    234A  HIS*     3.3     4.8    +      -       -      +
    235A  ILE*     2.9    40.9    +      -       +      +
    262A  TYR*     4.2    27.6    -      -       +      +
    265A  TYR*     3.2    35.6    -      -       +      +
    269A  VAL*     5.7     0.4    -      -       +      -
    206D  PHE*     6.4     0.4    -      -       +      -
    207D  ILE*     4.1    17.5    -      -       +      -
    210D  ILE*     3.7    32.1    -      -       +      -
    230D  THR*     6.1     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 232 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228A  VAL*     2.9    16.1    +      -       +      +
    229A  SER*     4.0    11.7    -      -       -      +
    230A  THR      3.2     0.2    -      -       -      -
    231A  LEU*     1.3    76.0    -      -       -      +
    233A  ALA*     1.3    57.7    +      -       -      +
    235A  ILE*     3.0    17.2    +      -       -      +
    236A  ALA*     2.9    25.9    +      -       -      +
    229D  SER      5.9     3.1    -      -       -      +
    233D  ALA*     5.7     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 233 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  ILE*     3.7    16.8    -      -       +      -
    229A  SER      3.8    10.5    +      -       -      +
    230A  THR*     3.3     9.0    +      -       -      +
    232A  ALA*     1.3    78.3    -      -       -      +
    234A  HIS*     1.3    58.2    +      -       -      +
    236A  ALA*     3.3     9.7    -      -       -      +
    237A  PHE*     3.0    33.8    +      -       -      -
    232C  ALA*     5.9     3.6    -      -       +      -
    235C  ILE*     3.7    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 234 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  MET*     3.7    24.4    -      -       +      -
    207A  ILE*     3.3    10.9    -      -       +      +
    230A  THR      3.0    14.0    +      -       -      +
    231A  LEU*     3.5    12.6    -      -       -      +
    232A  ALA      3.1     0.4    -      -       -      -
    233A  ALA*     1.3    75.6    -      -       -      +
    235A  ILE*     1.3    61.1    +      -       -      +
    237A  PHE*     3.5     3.2    +      -       -      +
    238A  ASN*     2.9    27.2    +      -       -      +
    258A  ILE*     3.1    38.0    +      -       +      +
    261A  ILE*     3.2    28.5    -      -       +      +
    262A  TYR*     3.4    40.4    +      +       -      -
    265A  TYR*     4.1     9.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with ILE 235 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231A  LEU*     2.9    28.9    +      -       +      +
    232A  ALA*     3.3     9.0    -      -       -      +
    234A  HIS*     1.3    71.1    -      -       -      +
    236A  ALA*     1.3    61.2    +      -       -      +
    238A  ASN*     3.3     1.4    +      -       -      +
    239A  ILE*     2.9    41.4    +      -       +      +
    262A  TYR*     3.6    26.5    -      -       +      +
    207D  ILE*     4.1    21.1    -      -       +      -
    233D  ALA*     3.8    28.9    -      -       +      +
    236D  ALA*     5.9     2.5    -      -       +      -
    237D  PHE*     3.6    31.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 236 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232A  ALA      2.9    11.4    +      -       -      +
    233A  ALA*     3.3    15.0    -      -       -      +
    234A  HIS      3.2     0.2    -      -       -      -
    235A  ILE*     1.3    78.6    -      -       -      +
    237A  PHE*     1.3    58.5    +      -       +      +
    239A  ILE*     3.3     6.7    +      -       -      +
    240A  LEU*     2.9    29.4    +      -       -      +
    235C  ILE*     5.6     4.5    -      -       +      -
    239C  ILE*     5.3    11.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 237 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  ASN      3.6    19.3    -      -       -      -
    200A  ILE*     3.9    33.9    -      -       +      -
    203A  PRO*     3.7    26.5    -      -       +      -
    204A  MET*     4.5    24.0    -      -       +      -
    207A  ILE*     4.6     9.0    -      -       +      -
    233A  ALA      3.0    28.9    +      -       -      +
    234A  HIS      3.9     4.3    -      -       -      +
    236A  ALA*     1.3    76.0    -      -       -      +
    238A  ASN*     1.3    64.5    +      -       -      +
    240A  LEU*     3.2    15.5    +      -       +      +
    241A  VAL*     3.0    29.0    +      -       -      +
    258A  ILE*     4.7     1.1    -      -       -      -
    235C  ILE*     3.6    43.5    -      -       +      -
    238C  ASN*     5.0     0.7    -      -       -      -
    239C  ILE*     4.6     5.2    -      -       +      -
    262C  TYR*     3.9     4.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 238 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234A  HIS      2.9    19.0    +      -       -      +
    235A  ILE      3.3     5.7    +      -       -      +
    237A  PHE*     1.3    76.2    -      -       -      +
    239A  ILE*     1.3    61.5    +      -       -      +
    241A  VAL*     3.3     1.9    +      -       -      +
    242A  GLU*     2.9    50.4    +      -       -      +
    258A  ILE*     3.2    45.8    -      -       +      +
    262A  TYR*     3.2    28.7    +      -       +      +
    198D  PRO      4.6     1.4    -      -       -      +
    199D  ASN*     3.8    20.5    +      -       -      +
    237D  PHE*     4.9     1.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 239 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  ILE*     2.9    37.7    +      -       +      +
    236A  ALA*     3.7     6.1    -      -       -      +
    238A  ASN*     1.3    74.2    -      -       -      +
    240A  LEU*     1.3    62.7    +      -       -      +
    242A  GLU*     3.3    11.3    +      -       -      +
    243A  THR*     2.9    45.8    +      -       -      +
    236D  ALA*     5.2    13.2    -      -       +      +
    237D  PHE*     4.8     8.7    -      -       +      -
    240D  LEU*     3.7    40.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 240 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200A  ILE*     3.5    32.3    -      -       +      -
    236A  ALA      2.9    14.8    +      -       -      +
    237A  PHE*     3.4    13.2    -      -       +      +
    239A  ILE*     1.3    80.4    -      -       -      +
    241A  VAL*     1.3    62.1    +      -       +      +
    243A  THR*     3.5    16.5    -      -       +      +
    244A  ASN*     3.8    16.1    +      -       -      +
    239C  ILE*     3.7    46.0    -      -       +      -
    242C  GLU*     4.3     9.0    -      -       -      +
    243C  THR*     5.0     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 241 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  TYR*     4.2    29.6    +      -       +      +
    200A  ILE*     4.1    28.7    -      -       +      -
    237A  PHE      3.0    16.9    +      -       -      +
    238A  ASN      4.0     2.5    -      -       -      +
    240A  LEU*     1.3    78.7    -      -       +      +
    242A  GLU*     1.3    63.9    +      -       -      +
    243A  THR      3.0     5.6    +      -       -      -
    244A  ASN*     3.3    13.1    +      -       -      +
    245A  LEU*     3.7    15.2    +      -       +      +
    254A  THR*     4.9    16.2    -      -       +      -
    258A  ILE*     5.0    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 242 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238A  ASN*     2.9    35.5    +      -       -      +
    239A  ILE*     3.7    13.4    -      -       -      +
    241A  VAL*     1.3    76.3    -      -       -      +
    243A  THR*     1.3    57.9    +      -       -      +
    244A  ASN      3.6     0.2    -      -       -      -
    245A  LEU*     3.2    24.2    -      -       -      +
    247A  LYS*     3.4    26.5    +      -       -      +
    199D  ASN*     3.6    28.9    -      -       -      +
    200D  ILE*     3.2    28.8    -      -       -      +
    240D  LEU*     4.1    10.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 243 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  LYS*     3.8    19.4    +      -       -      -
    239A  ILE*     2.9    31.7    +      -       -      +
    240A  LEU*     3.5     9.8    -      -       +      +
    241A  VAL      3.0     0.2    -      -       -      -
    242A  GLU*     1.3    76.8    -      -       -      +
    244A  ASN*     1.3    72.5    +      -       -      +
    245A  LEU      3.1     9.0    +      -       -      +
    240D  LEU*     4.9     8.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 244 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31A  ASP*     4.1     9.2    -      -       -      +
     32A  LYS*     3.6    16.2    +      -       -      +
    118A  TYR*     5.4     6.7    -      -       -      +
    240A  LEU*     3.8    14.2    +      -       -      +
    241A  VAL*     3.3     7.8    +      -       -      +
    243A  THR*     1.3    92.6    -      -       -      +
    245A  LEU*     1.3    68.1    +      -       +      +
     32C  LYS*     6.0     2.4    -      -       -      +
----------------------------------------------------------
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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