Contacts of the helix formed by residues 197 - 219 (chain Y) in PDB entry 1XDM


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 ASP 197 (chain Y).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193Y  ASP      4.8     6.3    +      -       -      -
    198Y  LEU*     1.3    62.1    +      -       -      +
    199Y  GLU*     3.3    19.1    +      -       -      +
    200Y  HIS*     2.8    29.4    +      -       -      +
    201Y  CYS*     2.7    36.4    +      -       -      +
    234Y  THR      5.0     3.1    -      -       -      -
    241Y  LYS*     3.4    39.7    -      -       +      +
    243Y  TYR*     3.2    21.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 198 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197Y  ASP*     1.3    79.4    +      -       -      +
    199Y  GLU*     1.3    57.9    +      -       -      +
    200Y  HIS      2.9     0.3    +      -       -      -
    201Y  CYS*     3.1     0.3    +      -       -      -
    202Y  GLN*     2.8    31.9    +      -       -      +
    233Y  VAL*     3.4    26.9    -      -       +      +
    234Y  THR*     3.7    15.4    -      -       -      -
    243Y  TYR*     3.1    55.4    +      -       +      +
    247Y  GLN*     4.0    20.2    -      -       +      -
    248Y  VAL*     4.3     0.7    -      -       -      +
    251Y  ALA*     3.3    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 199 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197Y  ASP*     3.3    10.4    +      -       -      +
    198Y  LEU*     1.3    79.6    -      -       -      +
    200Y  HIS*     1.3    59.7    +      -       -      +
    202Y  GLN*     3.6    11.7    -      -       -      +
    203Y  TYR*     3.3    21.8    +      -       -      +
    243Y  TYR*     4.7     0.2    +      -       -      -
    364Y  SO4      4.6    16.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 200 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193Y  ASP*     3.5    38.8    +      -       -      +
    197Y  ASP*     2.8    28.6    +      -       -      +
    199Y  GLU*     1.3    75.7    -      -       -      +
    201Y  CYS*     1.3    66.8    +      -       -      -
    202Y  GLN      3.0     2.0    +      -       -      -
    203Y  TYR*     3.0    13.5    +      +       -      +
    204Y  VAL*     3.0    42.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 201 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190Y  VAL*     4.3    21.7    -      -       -      +
    191Y  ILE      5.2     3.8    -      -       -      -
    193Y  ASP      6.0     3.8    -      -       -      -
    197Y  ASP      2.7    16.9    +      -       -      +
    198Y  LEU      3.8     3.4    -      -       -      +
    200Y  HIS*     1.3    77.3    -      -       +      +
    202Y  GLN*     1.3    57.9    +      -       -      +
    204Y  VAL*     3.5     7.8    +      -       -      +
    205Y  THR*     2.7    35.5    +      -       -      -
    231Y  ASN*     4.6     4.7    -      -       -      -
    232Y  MET      4.7     1.1    -      -       -      -
    233Y  VAL*     3.8    12.8    -      -       +      -
    234Y  THR*     3.8    30.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 202 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198Y  LEU      2.8    17.2    +      -       -      +
    199Y  GLU*     3.6    13.5    -      -       -      +
    201Y  CYS*     1.3    76.7    -      -       -      +
    203Y  TYR*     1.3    65.9    +      -       -      +
    205Y  THR*     2.9    15.2    +      -       -      -
    206Y  GLU*     2.7    47.7    +      -       -      +
    233Y  VAL*     3.3    12.9    -      -       +      +
    251Y  ALA*     3.2    34.9    -      -       +      +
    254Y  THR*     3.3    13.1    -      -       -      +
    255Y  ALA*     3.9     4.6    -      -       +      +
    364Y  SO4      3.0    33.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 203 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199Y  GLU      3.3    11.3    +      -       -      +
    200Y  HIS*     3.0    16.3    +      +       -      +
    202Y  GLN*     1.3    79.6    -      -       -      +
    204Y  VAL*     1.3    68.8    +      -       +      +
    206Y  GLU*     3.4    16.7    +      -       +      +
    207Y  LYS*     3.3    54.2    +      -       +      +
    217Z  ASN*     5.7     2.2    -      -       -      -
    220Z  HIS*     4.8    24.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with VAL 204 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163Y  ILE*     5.9     2.0    -      -       +      -
    190Y  VAL*     4.7    17.3    -      -       +      -
    200Y  HIS*     3.0    40.1    +      -       +      +
    201Y  CYS*     3.7     8.5    -      -       -      +
    203Y  TYR*     1.3    80.0    -      -       +      +
    205Y  THR*     1.3    65.7    +      -       -      +
    207Y  LYS*     2.9    21.9    +      -       +      +
    208Y  VAL*     3.0    32.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 205 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190Y  VAL*     4.4    10.0    -      -       +      +
    201Y  CYS*     2.7    22.2    +      -       -      -
    202Y  GLN      2.9     9.1    +      -       -      -
    204Y  VAL*     1.3    75.8    -      -       -      +
    206Y  GLU*     1.3    57.7    +      -       -      +
    208Y  VAL*     3.6     6.9    +      -       -      +
    209Y  LEU*     2.9    54.6    +      -       +      +
    230Y  PRO*     5.9     2.2    -      -       +      -
    231Y  ASN*     4.0    21.0    +      -       -      +
    233Y  VAL*     3.3    27.1    -      -       +      +
    255Y  ALA*     4.4     7.2    -      -       +      -
    256Y  LEU*     5.7     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 206 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202Y  GLN*     2.7    42.4    +      -       -      +
    203Y  TYR*     3.7    17.6    -      -       +      +
    204Y  VAL      3.1     0.2    -      -       -      -
    205Y  THR*     1.3    72.6    -      -       -      +
    207Y  LYS*     1.3    66.6    +      -       +      +
    209Y  LEU*     3.4     1.1    +      -       -      -
    210Y  ALA      3.1    14.0    +      -       -      -
    255Y  ALA*     3.2    25.8    -      -       +      +
    258Y  ARG*     3.2    28.0    +      -       -      +
    259Y  THR*     3.2    26.3    -      -       +      +
    364Y  SO4      5.3     0.2    +      -       -      -
    217Z  ASN*     3.4    13.5    +      -       -      +
    220Z  HIS*     5.3     6.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 207 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159Y  SER      6.1     0.2    -      -       -      -
    160Y  SER*     4.6    15.9    +      -       -      +
    163Y  ILE*     4.6    19.1    -      -       +      +
    203Y  TYR*     3.3    53.2    +      -       +      +
    204Y  VAL*     2.9    13.1    +      -       +      +
    206Y  GLU*     1.3    73.1    -      -       +      +
    208Y  VAL*     1.3    60.2    +      -       +      +
    209Y  LEU      2.9     3.4    -      -       -      -
    210Y  ALA*     2.7    26.5    +      -       -      +
    211Y  ALA*     3.0    12.7    +      -       -      +
    217Z  ASN*     4.4    15.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 208 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163Y  ILE*     3.9    33.4    -      -       +      +
    166Y  ASN*     6.3     0.2    -      -       +      -
    188Y  PRO*     4.3    14.1    -      -       +      -
    189Y  GLU*     3.5    40.8    -      -       -      +
    190Y  VAL*     5.0     1.1    -      -       +      -
    204Y  VAL*     3.0    36.3    +      -       +      +
    205Y  THR*     3.9     6.7    -      -       -      +
    207Y  LYS*     1.3    74.1    -      -       +      +
    209Y  LEU*     1.3    57.8    +      -       +      +
    211Y  ALA*     3.8     2.1    -      -       -      +
    212Y  VAL*     2.9    31.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 209 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188Y  PRO*     4.1    18.2    -      -       +      -
    205Y  THR*     2.9    42.3    +      -       +      +
    206Y  GLU      3.8     1.1    -      -       -      +
    207Y  LYS      2.8     0.6    +      -       -      -
    208Y  VAL*     1.3    77.2    -      -       +      +
    210Y  ALA*     1.3    63.5    +      -       -      +
    211Y  ALA      3.4     0.4    -      -       -      -
    212Y  VAL*     3.9     3.1    -      -       +      +
    213Y  TYR*     3.3    42.5    +      -       +      +
    228Y  LEU*     3.9    29.8    -      -       +      -
    230Y  PRO*     5.1     4.7    -      -       +      -
    255Y  ALA      4.8     2.7    -      -       -      +
    256Y  LEU*     3.8    23.3    -      -       +      -
    259Y  THR*     3.4    29.9    -      -       -      +
    260Y  VAL*     4.0     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 210 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206Y  GLU      3.1    12.4    +      -       -      +
    207Y  LYS*     2.7    12.7    +      -       -      +
    209Y  LEU*     1.3    71.0    -      -       -      +
    211Y  ALA*     1.3    68.1    +      -       -      +
    212Y  VAL      3.1     0.4    -      -       -      -
    213Y  TYR*     4.0     2.0    -      -       -      +
    214Y  LYS*     2.9    29.1    +      -       -      +
    259Y  THR*     4.4     8.1    -      -       +      -
    214Z  LYS*     4.0    15.8    -      -       +      +
    217Z  ASN*     3.5    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 211 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163Y  ILE*     3.4    35.9    -      -       +      +
    164Y  GLN*     5.1     2.0    -      -       -      +
    167Y  ALA*     3.4    14.1    -      -       +      +
    207Y  LYS      3.0     8.9    +      -       -      +
    208Y  VAL      3.8     2.5    -      -       -      +
    210Y  ALA*     1.3    77.6    -      -       -      +
    212Y  VAL*     1.3    51.7    +      -       -      +
    214Y  LYS*     3.5     4.3    -      -       -      +
    215Y  ALA*     2.8    35.2    +      -       -      +
    214Z  LYS*     4.6    12.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 212 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163Y  ILE*     5.9     0.7    -      -       +      -
    166Y  ASN*     6.2     0.7    -      -       +      -
    167Y  ALA*     3.9    20.6    -      -       +      +
    170Y  LEU*     4.9     8.3    -      -       +      -
    186Y  VAL*     3.6    22.4    -      -       +      -
    188Y  PRO*     4.2    17.7    -      -       +      -
    208Y  VAL*     2.9    23.1    +      -       +      +
    209Y  LEU*     4.0     7.2    -      -       +      +
    210Y  ALA      3.1     0.6    -      -       -      -
    211Y  ALA*     1.3    73.4    -      -       +      +
    213Y  TYR*     1.3    67.3    +      -       +      +
    214Y  LYS      3.1     1.6    -      -       -      -
    215Y  ALA*     3.2     6.3    +      -       -      +
    216Y  LEU*     2.8    52.2    +      -       +      +
    228Y  LEU*     5.4     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 213 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186Y  VAL*     4.9     0.9    -      -       +      +
    209Y  LEU*     3.3    30.2    +      -       +      +
    210Y  ALA*     4.7     1.3    -      -       -      +
    212Y  VAL*     1.3    79.6    -      -       +      +
    214Y  LYS*     1.3    63.7    +      -       -      +
    216Y  LEU*     3.9    16.5    -      -       +      +
    217Y  ASN*     3.4    19.1    +      -       -      +
    223Y  LEU*     3.6    28.7    -      -       +      +
    226Y  THR*     4.7     8.1    -      -       +      +
    228Y  LEU*     2.7    52.0    -      -       +      +
    259Y  THR      4.3     2.9    -      -       -      +
    260Y  VAL*     3.6    31.0    -      -       +      +
    261Y  PRO*     3.6    26.4    -      -       +      +
    264Y  VAL*     3.4    23.3    -      -       +      +
    210Z  ALA*     5.8     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 214 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210Y  ALA      2.9    20.8    +      -       -      +
    211Y  ALA      3.5     3.4    -      -       -      +
    213Y  TYR*     1.3    76.4    -      -       -      +
    215Y  ALA*     1.3    56.8    +      -       -      +
    217Y  ASN*     2.8    23.9    +      -       -      +
    218Y  ASP*     2.9    45.9    +      -       -      +
    164Z  GLN*     5.5     6.5    -      -       -      +
    207Z  LYS      5.7     1.1    -      -       -      -
    210Z  ALA*     3.8    17.5    -      -       +      +
    211Z  ALA*     4.4    19.7    -      -       -      +
    214Z  LYS*     3.7    49.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 215 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167Y  ALA*     3.3    35.7    -      -       +      +
    168Y  ASN*     3.8    12.1    -      -       -      +
    171Y  ALA*     4.0     2.2    -      -       +      -
    211Y  ALA      2.8    19.7    +      -       -      +
    212Y  VAL      3.2     6.5    -      -       -      +
    214Y  LYS*     1.3    75.3    -      -       -      +
    216Y  LEU*     1.3    62.8    +      -       -      +
    217Y  ASN      2.9     1.7    +      -       -      -
    218Y  ASP*     2.9    16.1    +      -       -      -
    219Y  HIS*     2.8    24.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 216 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170Y  LEU      4.2     0.4    -      -       -      +
    171Y  ALA*     3.9    12.1    -      -       +      +
    174Y  ALA*     3.6    21.8    -      -       +      -
    186Y  VAL*     4.1    17.9    -      -       +      -
    212Y  VAL*     2.8    46.3    +      -       +      +
    213Y  TYR*     3.9    27.4    -      -       +      +
    214Y  LYS      3.3     0.2    -      -       -      -
    215Y  ALA*     1.3    73.1    -      -       -      +
    217Y  ASN*     1.3    56.7    +      -       -      +
    219Y  HIS      3.9     0.4    -      -       -      -
    220Y  HIS      3.3     2.8    +      -       -      -
    221Y  VAL*     2.8    71.6    +      -       +      +
    223Y  LEU*     4.2    13.0    -      -       +      -
    226Y  THR*     5.4     2.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 217 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213Y  TYR      3.4    12.3    +      -       -      +
    214Y  LYS      2.8    11.4    +      -       -      +
    216Y  LEU*     1.3    77.7    -      -       -      +
    218Y  ASP*     1.3    64.5    +      -       -      +
    219Y  HIS      3.0     1.3    -      -       -      -
    220Y  HIS*     2.8    21.9    +      -       -      +
    221Y  VAL      4.9     0.4    -      -       -      +
    223Y  LEU*     5.4     9.2    -      -       +      +
    203Z  TYR*     5.3     6.1    +      -       -      -
    206Z  GLU*     4.0    13.4    +      -       -      +
    207Z  LYS*     4.2    20.8    +      -       -      +
    210Z  ALA*     3.3    33.5    -      -       +      +
    258Z  ARG*     5.1     4.0    +      -       -      +
    259Z  THR*     4.1    10.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 218 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161X  LEU*     3.3    37.2    -      -       +      +
    164X  GLN*     5.7     2.2    +      -       -      -
    168Y  ASN*     4.5     5.6    -      -       -      +
    214Y  LYS*     2.9    52.7    +      -       -      +
    215Y  ALA*     2.9    12.3    +      -       -      +
    217Y  ASN*     1.3    79.2    -      -       -      +
    219Y  HIS*     1.3    62.6    +      -       +      +
    220Y  HIS*     3.5     1.6    +      -       -      +
    203Z  TYR*     5.3     4.5    +      -       -      -
    207Z  LYS*     6.2     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 219 (chain Y). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161X  LEU*     4.5    15.6    -      -       +      +
    165X  GLU*     2.8    29.7    +      -       -      -
    168Y  ASN*     3.3    37.8    +      -       -      -
    171Y  ALA*     3.5    15.1    -      -       +      +
    172Y  ARG*     3.7    15.9    +      -       +      +
    175Y  SER*     4.5    10.7    +      -       -      +
    215Y  ALA      2.8    29.2    +      -       -      +
    217Y  ASN      3.0     0.8    -      -       -      -
    218Y  ASP*     1.3    83.0    -      -       +      +
    220Y  HIS*     1.3    71.8    +      -       -      +
    221Y  VAL*     3.4    16.5    +      -       +      +
----------------------------------------------------------
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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