Contacts of the helix formed by residues 140 - 164 (chain A) in PDB entry 1BMO


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 140 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  CYS      3.4     1.8    +      -       -      -
    139A  LEU*     1.3    70.4    -      -       -      +
    141A  SER*     1.3    64.8    +      -       -      +
    143A  LEU*     3.2    16.6    +      -       -      +
    144A  THR*     3.5    11.1    +      -       -      +
    251A  ARG*     2.6    37.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139A  LEU*     2.8    14.7    +      -       -      +
    140A  ASP*     1.3    78.0    -      -       -      +
    142A  GLU*     1.3    67.8    +      -       -      +
    144A  THR*     2.9    25.0    +      -       -      -
    145A  GLU*     3.5    11.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 142 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139A  LEU*     2.7    57.8    +      -       +      +
    141A  SER*     1.3    76.4    +      -       -      +
    143A  LEU*     1.3    56.8    +      -       -      +
    145A  GLU*     3.3     2.6    +      -       -      -
    146A  PHE*     2.8    30.1    +      -       -      +
    245A  MET*     3.5    38.6    -      -       +      +
    247A  HIS*     2.7    34.5    +      -       -      -
    248A  CYS*     3.6     9.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 143 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  CYS*     3.9    15.9    -      -       -      -
    139A  LEU      3.1     5.7    +      -       -      +
    140A  ASP      3.4    10.5    -      -       -      +
    141A  SER      3.1     0.8    +      -       -      -
    142A  GLU*     1.3    77.8    -      -       -      +
    144A  THR*     1.3    66.6    +      -       +      +
    146A  PHE*     3.2    13.5    +      -       +      +
    147A  PRO*     3.3    12.1    -      -       -      +
    248A  CYS*     4.0     2.1    -      -       +      +
    251A  ARG*     3.5    52.3    -      -       +      +
    252A  PHE*     3.6    32.7    -      -       +      +
    255A  THR*     4.6    11.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 144 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  ASP      3.5     7.7    +      -       -      +
    141A  SER*     2.9    17.4    +      -       -      -
    143A  LEU*     1.3    81.2    -      -       +      +
    145A  GLU*     1.3    58.6    +      -       -      +
    147A  PRO*     3.5    10.8    -      -       -      +
    148A  LEU*     3.6    13.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 145 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  SER*     3.9    12.0    +      -       -      +
    142A  GLU*     3.3     8.7    +      -       -      +
    143A  LEU      3.2     0.6    -      -       -      -
    144A  THR*     1.3    79.3    +      -       -      +
    146A  PHE*     1.3    64.4    +      -       -      +
    147A  PRO      3.6     0.4    -      -       -      -
    148A  LEU*     3.5     9.8    +      -       -      +
    149A  ARG*     2.8    67.0    +      -       +      +
    196A  VAL*     3.7    29.4    -      -       +      +
    245A  MET*     3.2    24.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 146 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  GLU      2.8    12.1    +      -       -      +
    143A  LEU*     3.3    13.0    -      -       -      +
    145A  GLU*     1.3    74.6    -      -       -      +
    147A  PRO*     1.3    74.0    -      -       +      +
    149A  ARG*     2.9     7.4    +      -       -      +
    150A  MET*     2.9    58.9    +      -       +      +
    243A  ILE*     4.3     2.5    -      -       +      -
    244A  PRO      3.2    27.4    -      -       -      -
    245A  MET*     3.5    23.8    -      -       +      -
    248A  CYS*     3.8    10.1    -      -       +      -
    249A  THR*     3.5    26.5    -      -       -      -
    252A  PHE*     3.3    45.5    -      +       +      -
    253A  PHE*     4.5     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with PRO 147 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143A  LEU      3.3    14.8    -      -       -      +
    144A  THR*     3.5    12.1    -      -       -      +
    145A  GLU      3.6     0.2    -      -       -      -
    146A  PHE*     1.3    95.3    -      -       +      +
    148A  LEU*     1.3    61.6    +      -       +      +
    150A  MET      4.0     0.2    -      -       -      -
    151A  ARG*     3.0    40.6    +      -       -      +
    252A  PHE*     3.3    26.9    -      -       +      -
    272A  CYS      4.5    11.7    -      -       -      +
    273A  PHE*     4.1    14.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 148 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  THR      3.6    22.7    -      -       -      +
    145A  GLU      3.8     4.9    -      -       -      +
    146A  PHE      3.2     0.4    -      -       -      -
    147A  PRO*     1.3    80.6    -      -       +      +
    149A  ARG*     1.3    64.4    +      -       -      +
    151A  ARG*     3.6    24.3    +      -       -      +
    152A  ASP*     3.3    23.9    +      -       -      +
    196A  VAL*     3.5    32.3    -      -       +      +
    199A  LEU*     3.8    16.5    -      -       +      +
    200A  ALA*     3.4    39.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 149 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  GLU*     2.8    59.0    +      -       -      +
    146A  PHE*     2.9    11.8    +      -       -      +
    148A  LEU*     1.3    78.7    -      -       -      +
    150A  MET*     1.3    57.9    +      -       -      +
    152A  ASP*     3.7     4.7    +      -       -      +
    153A  TRP*     3.3    20.6    +      -       -      +
    193A  ASP*     4.4    19.4    +      -       -      -
    194A  HIS      3.7    20.8    +      -       -      +
    195A  PRO*     4.9     1.4    -      -       -      +
    196A  VAL*     3.9    13.7    -      -       -      +
    199A  LEU*     4.0    15.8    -      -       -      +
    244A  PRO*     3.8    30.8    -      -       +      +
    245A  MET*     4.4    12.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 150 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146A  PHE*     2.9    53.8    +      -       +      +
    147A  PRO      4.3     1.1    -      -       -      +
    149A  ARG*     1.3    69.8    -      -       -      +
    151A  ARG*     1.3    68.1    +      -       -      +
    152A  ASP      3.2     1.6    -      -       -      -
    153A  TRP*     3.1    30.1    +      -       +      +
    154A  LEU*     3.0    31.1    +      -       -      +
    238A  LEU*     3.9    31.6    -      -       +      -
    243A  ILE*     4.3     8.3    -      -       +      -
    244A  PRO*     4.6     8.1    -      -       +      +
    253A  PHE*     4.0     9.2    -      -       +      -
    269A  TRP*     5.2     1.6    -      -       -      -
    273A  PHE*     3.4    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 151 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147A  PRO*     3.0    22.2    +      -       -      +
    148A  LEU*     3.6    37.8    +      -       -      +
    150A  MET*     1.3    80.3    -      -       -      +
    152A  ASP*     1.3    63.1    +      -       -      +
    154A  LEU*     3.2    23.1    +      -       -      +
    155A  LYS      3.4     4.9    +      -       -      -
    199A  LEU      4.6     2.0    +      -       -      -
    200A  ALA*     5.2     0.2    -      -       -      +
    203A  PHE*     3.3    57.8    -      -       -      +
    210A  TYR*     3.9    22.4    -      -       +      -
    214A  VAL*     4.2    15.9    -      -       +      -
    273A  PHE*     2.7    52.0    +      -       +      +
    274A  GLY*     4.1     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 152 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  LEU      3.3    14.7    +      -       -      +
    149A  ARG      3.8     5.1    -      -       -      +
    150A  MET      3.2     0.2    -      -       -      -
    151A  ARG*     1.3    76.8    -      -       -      +
    153A  TRP*     1.3    68.2    +      -       -      +
    154A  LEU      3.1     0.9    +      -       -      -
    155A  LYS*     3.1    30.7    +      -       -      +
    156A  ASN*     3.1    37.0    +      -       -      -
    189A  LEU*     4.8     5.5    -      -       -      +
    190A  GLU      5.2     0.3    -      -       -      +
    192A  GLY      4.5    10.6    -      -       -      +
    194A  HIS*     4.7     3.3    -      -       -      -
    199A  LEU*     4.0    27.7    -      -       +      +
    210A  TYR*     4.3    13.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  ARG      3.3    13.0    +      -       -      +
    150A  MET*     3.1    23.8    +      -       +      +
    152A  ASP*     1.3    82.7    +      -       -      +
    154A  LEU*     1.3    76.0    +      -       +      +
    156A  ASN*     3.5     6.0    +      -       +      +
    157A  VAL*     3.0    54.3    +      -       +      +
    217A  GLN*     3.2    31.6    -      -       -      -
    237A  PRO      5.4     0.2    -      -       -      -
    238A  LEU*     3.6    16.2    -      -       +      -
    242A  LEU*     4.4    17.8    +      -       +      +
    243A  ILE*     3.6    33.7    -      -       +      -
    244A  PRO*     3.7    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  MET*     3.0    24.6    +      -       +      +
    151A  ARG*     3.3    14.6    -      -       +      +
    152A  ASP      3.1     0.2    -      -       -      -
    153A  TRP*     1.3    86.0    -      -       +      +
    155A  LYS*     1.3    68.6    +      -       -      +
    157A  VAL*     3.0    17.2    +      -       +      +
    158A  LEU*     3.0    14.6    +      -       -      +
    213A  PRO*     4.0    26.0    -      -       +      +
    214A  VAL*     4.0    22.2    -      -       +      +
    216A  TRP*     5.5     5.4    -      -       +      -
    217A  GLN*     3.3    46.4    -      -       +      +
    269A  TRP*     4.6     8.5    -      -       +      -
    273A  PHE*     5.3     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  ARG      3.4     1.6    +      -       -      -
    152A  ASP*     3.1    29.8    +      -       -      +
    154A  LEU*     1.3    77.8    -      -       -      +
    156A  ASN*     1.3    72.0    +      -       -      +
    158A  LEU*     3.5     1.9    +      -       -      +
    159A  VAL*     2.9    43.4    +      -       +      +
    182A  ILE*     4.4     9.0    -      -       +      -
    188A  ARG*     4.5     6.0    -      -       +      +
    189A  LEU*     2.8    34.7    +      -       -      +
    190A  GLU      4.7     0.4    +      -       -      -
    202A  ASP*     5.1     0.9    -      -       -      -
    209A  MET*     4.3    28.9    -      -       +      +
    210A  TYR*     3.7    37.7    -      -       +      -
    213A  PRO*     4.0    17.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  ASP*     3.1    42.6    +      -       -      +
    153A  TRP*     4.0     6.2    -      -       +      +
    155A  LYS*     1.3    88.4    +      -       -      +
    157A  VAL*     1.3    60.2    +      -       +      +
    159A  VAL*     3.7     4.0    -      -       -      +
    160A  THR*     2.8    35.1    +      -       +      +
    188A  ARG*     4.6    10.7    +      -       -      -
    190A  GLU      4.6     0.2    -      -       -      -
    191A  ALA*     3.3    40.0    +      -       +      +
    192A  GLY      4.7     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  TRP*     3.0    63.3    +      -       +      +
    154A  LEU*     3.0     9.7    +      -       +      +
    156A  ASN*     1.3    73.4    -      -       +      +
    158A  LEU*     1.3    61.9    +      -       -      +
    160A  THR*     3.0     8.7    +      -       -      +
    161A  LEU*     2.9    33.5    +      -       +      +
    216A  TRP*     4.3    22.0    -      -       +      -
    217A  GLN*     6.3     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  LEU      3.0    13.5    +      -       -      +
    155A  LYS*     3.8     5.6    -      -       -      +
    157A  VAL*     1.3    80.5    -      -       -      +
    159A  VAL*     1.3    61.0    +      -       +      +
    161A  LEU*     3.4     5.4    +      -       +      +
    162A  TYR      3.2    16.8    +      -       -      -
    171A  LEU*     3.7    21.2    -      -       +      +
    179A  VAL*     3.3    24.7    -      -       +      +
    182A  ILE*     5.5     0.7    -      -       +      -
    212A  PHE*     3.5    31.2    -      -       +      -
    213A  PRO*     3.5    26.5    -      -       +      -
    216A  TRP*     3.5    43.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  LYS*     2.9    32.2    +      -       +      +
    156A  ASN*     3.7     8.5    -      -       -      +
    157A  VAL      3.2     0.2    -      -       -      -
    158A  LEU*     1.3    75.6    -      -       +      +
    160A  THR*     1.3    60.3    +      -       +      +
    162A  TYR*     2.9    21.9    +      -       -      +
    163A  GLU*     3.0    27.5    +      -       -      +
    179A  VAL*     3.9     9.4    -      -       +      -
    182A  ILE*     4.2    23.6    -      -       +      -
    183A  HIS*     3.9    17.3    -      -       +      -
    188A  ARG*     3.3    32.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156A  ASN*     2.8    19.2    +      -       +      +
    157A  VAL*     3.0    14.7    +      -       -      +
    159A  VAL*     1.3    79.9    -      -       +      +
    161A  LEU*     1.3    56.0    +      -       -      +
    163A  GLU*     3.4    20.0    +      -       -      +
    164A  ARG*     2.9    36.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157A  VAL*     2.9    22.1    +      -       +      +
    158A  LEU*     3.5    10.5    -      -       +      +
    159A  VAL      3.0     0.4    +      -       -      -
    160A  THR*     1.3    74.6    -      -       -      +
    162A  TYR*     1.3    55.3    +      -       -      +
    164A  ARG*     3.1    28.5    +      -       -      +
    165A  ASP*     2.8    34.8    +      -       -      +
    170A  LEU*     3.4    30.0    -      -       +      +
    171A  LEU*     4.2    17.9    -      -       +      -
    216A  TRP*     3.5    38.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  LEU      3.2     1.0    +      -       -      -
    159A  VAL      2.9     7.4    +      -       -      +
    161A  LEU*     1.3    79.7    -      -       -      +
    163A  GLU*     1.3    74.1    +      -       +      +
    165A  ASP*     3.4    15.9    +      -       -      +
    171A  LEU*     3.5    12.8    -      -       +      +
    176A  LYS*     3.8    47.4    +      -       -      -
    179A  VAL*     3.6    20.6    -      -       +      -
    180A  LYS*     3.6    32.9    +      -       +      +
    183A  HIS*     3.3    37.1    +      +       +      -
    184A  GLU*     3.5    20.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  VAL*     3.0    23.3    +      -       -      +
    160A  THR*     3.8    19.4    -      -       -      +
    162A  TYR*     1.3    90.8    -      -       +      +
    164A  ARG*     1.3    60.6    +      -       +      +
    165A  ASP      3.6     4.2    +      -       -      +
    183A  HIS*     2.9    30.6    +      -       +      +
    188A  ARG*     5.4     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  THR*     2.9    21.0    +      -       -      +
    161A  LEU*     3.2    31.1    -      -       -      +
    163A  GLU*     1.3    75.4    -      -       -      +
    165A  ASP*     1.3    64.1    +      -       -      +
    166A  GLU*     3.7     4.2    +      -       -      +
    169A  ASN*     4.4     5.4    +      -       -      +
    170A  LEU*     3.6    31.0    -      -       +      +
----------------------------------------------------------
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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