Contacts of the helix formed by residues 103 - 127 (chain A) in PDB entry 5SV1


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 103 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  SER*     3.4     8.3    +      -       -      +
    102A  ASP*     1.3    75.1    -      -       -      +
    104A  ASN*     1.3    66.9    +      -       -      +
    105A  GLU*     3.3    21.2    +      -       -      +
    106A  GLY      3.5    14.0    +      -       -      -
    107A  ILE*     3.8     9.7    +      -       -      +
    108B  MLY      3.6    25.8    -      -       -      -
    225B  ASP*     3.6    23.6    -      -       -      +
    229B  SER*     3.7     3.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  SER      4.7     4.0    -      -       -      +
    102A  ASP      3.4    11.2    +      -       -      +
    103A  ASP*     1.3    71.9    +      -       -      +
    105A  GLU*     1.3    67.4    +      -       -      +
    106A  GLY      3.0     2.5    +      -       -      -
    107A  ILE*     3.3    16.3    +      -       -      +
    108A  MLY      3.2    42.4    +      -       -      +
    224A  LEU*     3.4    46.2    +      -       +      +
    225A  ASP*     5.0     1.6    +      -       -      +
    228A  ALA*     3.8    16.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  ASP*     3.3    15.4    +      -       -      +
    104A  ASN*     1.3    77.6    -      -       -      +
    106A  GLY*     1.3    61.3    +      -       -      +
    108A  MLY      3.7    32.6    -      -       -      +
    109A  GLU*     3.1    50.3    +      -       -      +
    108B  MLY      5.8     1.6    -      -       -      -
    105E  GLU*     5.4     5.4    -      -       -      +
    109E  GLU*     4.9     9.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  ASP*     3.5     8.3    +      -       -      -
    104A  ASN      3.0     1.0    -      -       -      -
    105A  GLU*     1.3    77.0    -      -       -      +
    107A  ILE*     1.3    69.3    +      -       -      +
    109A  GLU*     3.2     4.7    +      -       -      +
    110A  ARG*     2.9    44.5    +      -       -      +
    108B  MLY      4.0    16.6    -      -       -      -
    225B  ASP*     3.6     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  GLU*     4.3     7.7    -      -       +      +
     95A  LEU*     3.8    28.0    -      -       +      +
     98A  SER*     3.6    36.1    -      -       -      +
    101A  SER*     5.1     7.4    -      -       -      +
    103A  ASP      3.8    10.3    +      -       -      +
    104A  ASN*     3.3    17.8    +      -       -      +
    106A  GLY*     1.3    74.3    -      -       -      +
    108A  MLY      1.3    65.2    +      -       -      +
    110A  ARG*     3.0    14.4    +      -       -      +
    111A  THR*     2.9    23.7    +      -       -      +
    220A  GLN*     4.2    12.3    -      -       -      +
    224A  LEU*     3.7    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MLY 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  ASN*     3.2    21.1    +      -       -      +
    105A  GLU*     3.7    42.8    -      -       -      +
    107A  ILE*     1.3    76.5    +      -       -      +
    109A  GLU*     1.3    68.4    +      -       -      +
    111A  THR*     3.0    12.8    +      -       -      -
    112A  SER*     3.2    14.2    +      -       -      -
    217A  LEU*     5.4     0.3    -      -       -      +
    220A  GLN*     3.9    12.6    -      -       -      +
    221A  SER*     3.8    34.8    -      -       -      +
    224A  LEU*     4.6    13.5    -      -       +      -
    225A  ASP*     2.7    34.8    +      -       -      -
    103E  ASP*     3.6    14.4    -      -       -      -
    105E  GLU      5.7     0.2    -      -       -      -
    106E  GLY*     4.2    11.4    -      -       -      -
    109E  GLU*     3.9    21.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  GLU*     3.1    43.0    +      -       -      +
    106A  GLY      3.5     4.9    -      -       -      +
    108A  MLY      1.3    79.9    +      -       -      +
    110A  ARG*     1.3    65.8    +      -       +      +
    112A  SER*     3.0    14.2    +      -       -      -
    113A  PHE*     3.1    12.5    +      -       -      +
    105B  GLU*     6.0     1.9    -      -       -      +
    108B  MLY      3.3    30.0    -      -       -      +
    221B  SER*     5.0     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  GLU*     3.2    26.7    +      -       -      +
     98A  SER*     3.0    27.0    +      -       -      -
    101A  SER*     4.5     3.0    +      -       -      -
    106A  GLY*     2.9    22.3    +      -       -      +
    107A  ILE*     3.2    32.4    -      -       -      +
    109A  GLU*     1.3    73.2    -      -       +      +
    111A  THR*     1.3    66.6    +      -       -      +
    113A  PHE*     3.1     7.3    +      -       -      +
    114A  ARG*     3.0    22.2    +      -       -      +
    218B  LEU*     3.7    29.1    -      -       +      +
    221B  SER*     3.1    30.4    +      -       -      +
    222B  ARG*     3.9    15.2    -      -       -      +
    225B  ASP*     2.5    44.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  GLU      5.6     0.2    -      -       -      -
     91A  ALA*     4.1    19.5    -      -       +      +
     94A  GLU*     3.8    17.2    -      -       +      +
    107A  ILE      2.9    13.2    +      -       -      -
    108A  MLY      3.0     4.0    +      -       -      -
    110A  ARG*     1.3    74.1    -      -       -      +
    112A  SER*     1.3    65.4    +      -       -      +
    114A  ARG*     3.0     8.2    +      -       -      +
    115A  LEU*     2.8    28.1    +      -       +      +
    216A  VAL*     5.6     0.2    -      -       +      -
    217A  LEU*     3.5    21.8    -      -       +      -
    220A  GLN*     2.7    40.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 112 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  MLY      3.2     6.6    +      -       -      -
    109A  GLU*     3.0    11.1    +      -       -      -
    111A  THR*     1.3    77.1    -      -       -      +
    113A  PHE*     1.3    65.1    +      -       -      +
    115A  LEU*     3.0     1.7    +      -       -      +
    116A  GLU*     2.8    36.2    +      -       -      +
    217A  LEU*     3.2    34.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 113 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  GLU      3.1     8.4    +      -       -      +
    110A  ARG*     3.1    12.9    +      -       -      +
    112A  SER*     1.3    78.4    -      -       -      +
    114A  ARG*     1.3    65.1    +      -       -      +
    116A  GLU*     4.3     3.1    -      -       +      +
    117A  ARG*     3.3    38.5    +      -       +      +
    214B  ALA*     3.6    37.2    -      -       +      -
    217B  LEU*     4.3    22.7    -      -       +      -
    218B  LEU*     4.1    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 114 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  GLU*     2.7    62.6    +      -       +      +
     93A  ASN*     2.9    34.3    +      -       -      +
     94A  GLU*     3.4    23.1    +      -       -      +
     97A  LEU*     4.8     4.6    -      -       -      +
    110A  ARG      3.0    11.0    +      -       -      +
    111A  THR*     3.0     7.9    +      -       -      +
    113A  PHE*     1.3    73.1    -      -       -      +
    115A  LEU*     1.3    69.8    +      -       +      +
    117A  ARG*     3.0     9.5    +      -       -      +
    118A  ARG*     2.8    22.9    +      -       -      +
    218B  LEU*     3.6    33.3    -      -       +      +
    222B  ARG*     5.0     3.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 115 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  LEU*     3.7    39.2    -      -       +      +
     90A  GLU*     3.8    20.0    -      -       +      -
     91A  ALA*     4.7     0.7    -      -       +      +
    111A  THR*     2.8    29.4    +      -       +      +
    112A  SER*     4.0     1.6    -      -       -      +
    114A  ARG*     1.3    71.9    -      -       +      +
    116A  GLU*     1.3    68.2    +      -       -      +
    118A  ARG*     3.0    13.1    +      -       +      +
    119A  VAL*     3.1    15.8    +      -       -      +
    213A  ALA*     4.0    23.1    -      -       +      +
    216A  VAL*     3.8    26.5    -      -       +      -
    217A  LEU*     3.7    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 116 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  SER*     2.8    35.9    +      -       -      +
    113A  PHE*     4.3     4.7    -      -       +      +
    115A  LEU*     1.3    73.2    -      -       -      +
    117A  ARG*     1.3    62.9    +      -       -      +
    119A  VAL*     2.9    18.1    +      -       -      +
    120A  ALA*     3.2     9.4    +      -       -      +
    210A  GLY*     5.7     2.1    -      -       -      +
    213A  ALA*     5.2     6.9    -      -       -      +
    214A  ALA      5.9     0.2    +      -       -      -
    217A  LEU*     4.6    13.7    -      -       +      +
    113E  PHE*     5.2    10.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 117 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113A  PHE*     3.3    35.2    +      -       +      +
    114A  ARG*     3.0     5.8    +      -       -      +
    116A  GLU*     1.3    79.1    -      -       -      +
    118A  ARG*     1.3    68.8    +      -       -      +
    120A  ALA*     3.0    19.4    +      -       +      +
    121A  ALA*     3.1    13.3    +      -       +      +
    124A  ARG*     5.5     2.2    +      -       -      +
    207B  ALA*     4.0     4.8    +      -       -      +
    210B  GLY*     3.5    22.0    +      -       -      -
    211B  ASP*     2.3    51.4    +      -       -      +
    214B  ALA*     3.8    18.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 118 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  HIS*     5.7     7.3    -      -       +      +
     87A  LEU*     4.1    21.3    -      -       +      -
     90A  GLU*     3.1    39.8    +      -       -      +
    114A  ARG      2.8    16.4    +      -       -      +
    115A  LEU*     3.0    13.2    +      -       -      +
    117A  ARG*     1.3    73.8    -      -       -      +
    119A  VAL*     1.3    64.3    +      -       -      +
    121A  ALA*     3.0    25.3    +      -       -      +
    122A  VAL*     3.1    19.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 119 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  LEU*     5.1     2.0    -      -       +      -
    115A  LEU      3.1    11.5    +      -       -      +
    116A  GLU*     2.9    12.6    +      -       -      +
    118A  ARG*     1.3    75.6    -      -       -      +
    120A  ALA*     1.3    65.5    +      -       -      +
    122A  VAL*     2.9    21.6    +      -       -      +
    123A  GLY      3.1     9.4    +      -       -      -
    206A  LYS*     4.3    33.2    -      -       +      +
    209A  LEU*     3.6    34.1    -      -       +      +
    210A  GLY*     4.4     5.2    -      -       -      +
    213A  ALA*     4.2    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 120 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  GLU      3.2     4.2    +      -       -      +
    117A  ARG*     3.0    16.4    +      -       +      +
    119A  VAL*     1.3    79.3    -      -       -      +
    121A  ALA*     1.3    63.3    +      -       -      +
    123A  GLY*     2.9    13.6    +      -       -      +
    124A  ARG*     3.0    20.5    +      -       -      +
    206A  LYS*     5.0     6.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 121 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  ARG*     3.1    12.1    +      -       +      +
    118A  ARG*     3.0    22.4    +      -       -      +
    120A  ALA*     1.3    74.9    -      -       -      +
    122A  VAL*     1.3    64.8    +      -       +      +
    124A  ARG*     3.0    35.2    +      -       -      +
    125A  GLN*     3.0    32.7    +      -       -      +
    211B  ASP*     5.8     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 122 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  LEU*     4.5    19.1    -      -       +      -
    118A  ARG*     3.1    18.2    +      -       +      +
    119A  VAL*     2.9    10.8    +      -       +      +
    121A  ALA*     1.3    75.2    -      -       +      +
    123A  GLY*     1.3    62.8    +      -       -      +
    125A  GLN*     3.0    14.9    +      -       -      +
    126A  MET*     2.9    29.7    +      -       +      +
    205A  PHE*     4.0    21.8    -      -       +      -
    206A  LYS*     6.0     2.9    -      -       +      -
    209A  LEU*     3.6    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 123 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  VAL      3.1     6.5    +      -       -      -
    120A  ALA      2.9     8.6    +      -       -      -
    122A  VAL*     1.3    77.2    -      -       -      +
    124A  ARG*     1.3    60.9    +      -       -      +
    126A  MET*     2.9    10.9    +      -       -      +
    127A  GLY*     2.9    21.7    +      -       -      -
    202A  ILE*     5.0     2.8    -      -       -      +
    206A  LYS*     3.4    34.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 124 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  ARG*     5.5     1.6    -      -       -      +
    120A  ALA*     3.0    16.7    +      -       -      +
    121A  ALA*     3.0    35.2    +      -       -      +
    123A  GLY*     1.3    76.4    -      -       -      +
    125A  GLN*     1.3    66.1    +      -       -      +
    127A  GLY*     3.8     2.2    +      -       -      +
    128A  ARG*     3.6    19.6    +      -       -      +
    203B  GLY      5.3     2.9    -      -       -      -
    204B  GLY*     5.1     9.8    +      -       -      -
    207B  ALA*     3.6    34.8    -      -       -      +
    208B  MET*     5.5     3.6    -      -       -      +
    211B  ASP*     4.1    20.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 125 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  LYS*     6.1     0.5    -      -       -      -
    121A  ALA*     3.0    21.3    +      -       -      +
    122A  VAL*     3.5    12.9    -      -       -      +
    124A  ARG*     1.3    82.9    -      -       +      +
    126A  MET*     1.3    72.4    +      -       +      +
    128A  ARG*     3.7    17.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 126 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  LYS*     5.3     7.3    -      -       -      +
     47A  GLU*     4.6    12.6    -      -       +      +
     48A  PHE*     4.6    16.6    -      -       -      -
     51A  GLN*     4.2    24.7    -      -       -      +
    122A  VAL*     2.9    26.5    +      -       +      +
    123A  GLY*     2.9     8.5    +      -       -      +
    125A  GLN*     1.3    85.6    -      -       +      +
    127A  GLY*     1.3    59.7    +      -       -      +
    128A  ARG      3.2     6.2    +      -       -      +
    130A  ASN*     4.7     6.4    +      -       -      -
    202A  ILE*     3.6    28.2    -      -       +      +
    205A  PHE*     3.3    39.9    -      -       +      -
    206A  LYS*     6.4     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 127 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  GLY      2.9    13.4    +      -       -      -
    124A  ARG*     3.8     5.1    +      -       -      -
    125A  GLN      3.4     0.2    -      -       -      -
    126A  MET*     1.3    75.5    -      -       -      +
    128A  ARG*     1.3    61.2    +      -       -      +
    129A  GLY      3.3     4.0    +      -       -      -
    130A  ASN*     3.3    22.7    +      -       -      +
    131A  GLY      4.3     2.9    +      -       -      -
    202A  ILE*     3.9    10.9    -      -       -      +
    200B  ARG*     5.0     5.9    -      -       -      +
----------------------------------------------------------
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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