Contacts of the helix formed by residues 241 - 262 (chain S) in PDB entry 3FKS


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 ALA 241 (chain S).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77S  LEU      3.9    11.0    -      -       -      +
     78S  PHE*     3.5    31.5    +      -       -      +
     79S  GLY*     4.3     7.0    -      -       -      +
    239S  SER      3.7     1.1    +      -       -      -
    240S  GLU*     1.3    80.6    -      -       -      +
    242S  ALA*     1.3    67.1    +      -       -      +
    243S  PRO*     3.6     3.4    -      -       +      -
    244S  LEU*     3.5    19.1    +      -       +      +
    245S  GLN*     3.6     8.5    +      -       -      +
    287V  THR*     4.5     6.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 242 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241S  ALA*     1.3    69.3    -      -       -      +
    243S  PRO*     1.3    75.6    -      -       +      +
    245S  GLN*     3.0    17.0    +      -       -      +
    246S  TYR*     3.1     9.4    +      -       -      +
    279S  ALA*     3.8    16.1    -      -       +      +
    282S  GLN*     3.6    34.0    -      -       +      +
    283S  LEU*     3.8    21.1    -      -       +      -
    287V  THR*     4.3     7.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 243 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39S  GLY      5.7     0.7    -      -       -      +
     64S  MET*     5.1     2.7    -      -       -      -
     76S  VAL*     3.8    23.1    -      -       +      -
     77S  LEU      3.5    25.6    -      -       -      +
     78S  PHE*     3.9    20.4    -      -       +      -
    241S  ALA*     3.7     3.4    -      -       +      -
    242S  ALA*     1.3    95.1    -      -       +      +
    244S  LEU*     1.3    56.6    +      -       -      +
    246S  TYR*     3.1     4.2    +      -       +      +
    247S  LEU*     2.9    36.0    +      -       +      +
    283S  LEU*     3.6    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 244 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78S  PHE*     3.4    51.8    -      -       +      +
    111S  ASP*     5.1     4.7    -      -       -      +
    112S  ALA*     3.2    32.0    -      -       +      +
    113S  LEU*     4.6    13.7    -      -       +      -
    236S  ALA*     3.9     2.7    -      -       +      -
    240S  GLU*     3.5    40.2    -      -       +      +
    241S  ALA*     3.6    13.0    -      -       +      +
    242S  ALA      3.1     0.6    -      -       -      -
    243S  PRO*     1.3    80.8    -      -       -      +
    245S  GLN*     1.3    56.7    +      -       -      +
    247S  LEU*     3.4     0.8    +      -       -      -
    248S  ALA*     3.0    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 245 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208S  VAL*     3.7    12.3    -      -       +      +
    209S  GLY*     3.9    15.1    +      -       -      -
    236S  ALA*     3.3    29.2    -      -       +      +
    237S  THR      3.2    17.7    +      -       -      +
    238S  ALA*     3.8    12.5    +      -       -      +
    240S  GLU      3.4    13.9    +      -       -      -
    241S  ALA      3.7    10.1    +      -       -      +
    242S  ALA*     3.0     7.5    +      -       -      +
    244S  LEU*     1.3    75.1    -      -       -      +
    246S  TYR*     1.3    62.9    +      -       -      +
    249S  PRO*     3.2    18.7    -      -       -      +
    275S  LYS*     3.7    17.2    -      -       -      +
    276S  GLN*     3.6    10.0    -      -       -      +
    279S  ALA*     3.9    15.6    -      -       +      +
    286V  ALA*     5.1    12.3    +      -       -      +
    287V  THR*     4.8     7.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 246 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52S  GLU*     5.0     8.7    +      -       -      -
     64S  MET*     5.2     6.1    -      -       +      -
     66S  LEU*     5.1    17.4    -      -       +      +
    132S  GLN*     3.7    12.7    +      -       -      -
    242S  ALA      3.1    10.5    +      -       -      +
    243S  PRO*     3.1     8.4    +      -       +      +
    245S  GLN*     1.3    78.3    -      -       -      +
    247S  LEU*     1.3    84.0    +      -       +      +
    248S  ALA      3.5     0.2    -      -       -      -
    249S  PRO*     4.0     0.2    -      -       -      -
    250S  PHE*     3.3    20.8    -      +       -      -
    276S  GLN*     3.7    13.0    +      -       -      -
    279S  ALA*     4.5     0.4    -      -       -      +
    280S  TYR*     3.3    50.0    +      +       +      +
    283S  LEU*     3.8    21.8    -      -       +      -
    303S  LEU*     3.7    21.3    -      -       +      -
    306S  ARG*     3.6    18.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 247 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52S  GLU*     5.7     2.7    -      -       -      +
     64S  MET*     3.5    29.4    -      -       +      -
     78S  PHE*     3.6    27.6    -      -       +      -
     97S  VAL*     4.1    20.4    -      -       +      -
    112S  ALA*     4.5     6.7    -      -       +      +
    113S  LEU*     5.2     2.2    -      -       +      -
    131S  ALA*     4.3    20.0    -      -       +      -
    132S  GLN*     4.8     9.4    -      -       +      +
    243S  PRO      2.9    13.6    +      -       -      +
    244S  LEU*     4.1     3.4    -      -       -      +
    246S  TYR*     1.3    98.7    -      -       +      +
    248S  ALA*     1.3    59.6    +      -       -      +
    249S  PRO*     3.4     2.0    -      -       -      -
    250S  PHE*     3.3     3.7    +      -       +      +
    251S  THR*     2.8    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 248 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112S  ALA*     3.9    14.3    -      -       +      +
    206S  VAL*     4.3     7.1    -      -       +      +
    208S  VAL*     4.2    11.9    -      -       +      -
    234S  VAL*     4.4     5.3    -      -       +      +
    236S  ALA*     3.6    22.7    -      -       +      +
    244S  LEU      3.0    17.6    +      -       -      +
    245S  GLN      3.8     3.1    -      -       -      +
    247S  LEU*     1.3    76.9    -      -       -      +
    249S  PRO*     1.3    65.3    -      -       +      +
    251S  THR*     3.9     1.0    -      -       -      -
    252S  ALA*     3.0    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 249 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206S  VAL*     4.4     5.4    -      -       +      -
    208S  VAL*     4.3    11.2    -      -       +      -
    245S  GLN      3.2    14.8    -      -       -      +
    246S  TYR      3.9     4.9    -      -       -      +
    247S  LEU      3.6     2.5    -      -       -      -
    248S  ALA*     1.3    94.6    -      -       +      +
    250S  PHE*     1.3    56.0    +      -       -      +
    252S  ALA*     3.9     0.9    -      -       +      +
    253S  ALA*     3.1    26.7    +      -       -      +
    270S  TYR*     3.6    18.5    -      -       +      -
    273S  LEU*     4.6     3.8    -      -       +      -
    276S  GLN*     3.4    31.2    -      -       +      +
    307S  LEU*     3.2    30.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 250 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131S  ALA*     3.1    32.7    -      -       +      +
    132S  GLN*     3.4    33.9    -      -       -      +
    246S  TYR*     3.3    22.4    -      +       -      -
    247S  LEU*     3.3     7.9    +      -       +      +
    249S  PRO*     1.3    75.1    -      -       +      +
    251S  THR*     1.3    65.8    +      -       -      +
    253S  ALA*     3.2    14.7    +      -       -      +
    254S  SER*     3.6     4.9    +      -       -      -
    276S  GLN*     3.3    24.0    -      -       -      -
    303S  LEU*     3.4    36.8    -      -       +      -
    306S  ARG*     4.0    16.8    -      -       +      -
    307S  LEU*     3.8    31.4    -      -       +      -
    310S  ARG*     3.4    10.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 251 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97S  VAL*     4.9     5.4    -      -       -      +
     98S  ASP      5.5     0.9    +      -       -      -
     99S  VAL*     3.5    36.7    -      -       +      +
    111S  ASP      5.0     2.7    -      -       -      +
    112S  ALA*     2.9    32.4    +      -       -      +
    113S  LEU*     4.5     0.8    -      -       -      -
    114S  GLY*     5.5     0.2    -      -       -      -
    131S  ALA*     3.7    19.9    -      -       -      +
    234S  VAL*     5.2     3.6    -      -       +      -
    247S  LEU*     2.8    18.3    +      -       -      +
    248S  ALA      3.9     2.0    -      -       -      -
    250S  PHE*     1.3    74.0    -      -       -      +
    252S  ALA*     1.3    58.9    +      -       -      +
    253S  ALA      2.9     9.3    +      -       -      -
    254S  SER*     3.0    17.0    +      -       -      -
    255S  ILE*     3.5    10.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 252 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204S  VAL*     3.5    14.0    -      -       +      +
    206S  VAL*     3.7    27.1    -      -       +      -
    234S  VAL*     3.8    24.0    -      -       +      -
    248S  ALA      3.0    17.7    +      -       -      +
    249S  PRO      4.3     0.7    -      -       -      +
    251S  THR*     1.3    77.2    -      -       -      +
    253S  ALA*     1.3    59.3    +      -       -      +
    254S  SER      3.4     0.2    -      -       -      -
    255S  ILE*     4.0    12.3    -      -       -      +
    256S  GLY*     3.7     8.7    +      -       -      -
    268S  ILE*     3.2    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 253 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249S  PRO      3.1    14.5    +      -       -      +
    250S  PHE      3.2    16.2    -      -       -      +
    251S  THR      2.9     1.4    -      -       -      -
    252S  ALA*     1.3    79.2    -      -       -      +
    254S  SER*     1.3    57.8    +      -       -      +
    256S  GLY*     4.0     0.3    +      -       -      -
    257S  GLU*     2.9    28.8    +      -       -      +
    268S  ILE*     4.0     6.5    -      -       -      -
    270S  TYR*     3.9     7.0    -      -       -      +
    307S  LEU*     3.9    12.8    -      -       +      +
    310S  ARG*     3.6    24.5    -      -       +      +
    323S  LEU*     4.1    10.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 254 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99S  VAL*     4.3     4.7    -      -       -      -
    101S  VAL*     3.9     8.4    -      -       -      +
    129S  SER*     4.0    18.9    +      -       -      -
    130S  ARG      2.7    27.6    +      -       -      -
    131S  ALA*     4.2     0.3    -      -       -      -
    133S  VAL*     4.1     2.6    -      -       -      +
    250S  PHE      3.7     5.0    +      -       -      -
    251S  THR      3.0     7.8    +      -       -      -
    253S  ALA*     1.3    77.9    -      -       -      +
    255S  ILE*     1.3    66.2    +      -       -      +
    257S  GLU*     3.3     5.8    -      -       -      +
    258S  TRP*     2.9    23.7    +      -       -      +
    310S  ARG*     3.1    15.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 255 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99S  VAL*     3.6    17.7    -      -       +      -
    100S  PRO      3.2    27.1    -      -       -      +
    101S  VAL*     3.6    15.9    -      -       +      +
    102S  GLY      5.0     2.5    +      -       -      +
    105S  LEU*     3.7    19.3    -      -       +      -
    204S  VAL*     4.7     4.9    -      -       +      -
    232S  ILE*     4.0    32.3    -      -       +      -
    234S  VAL*     4.9     8.5    -      -       +      -
    251S  THR*     3.6    13.0    -      -       +      +
    252S  ALA*     4.0    13.7    -      -       -      +
    253S  ALA      3.4     0.2    -      -       -      -
    254S  SER*     1.3    78.5    -      -       -      +
    256S  GLY*     1.3    64.0    +      -       -      +
    258S  TRP*     3.2    16.8    +      -       -      +
    259S  PHE*     3.4    14.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 256 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204S  VAL*     3.7    23.5    -      -       -      +
    252S  ALA      3.7     8.1    +      -       -      -
    253S  ALA      4.1     1.3    -      -       -      -
    255S  ILE*     1.3    80.2    -      -       -      +
    257S  GLU*     1.3    60.8    +      -       -      +
    259S  PHE*     3.3    25.8    +      -       -      +
    260S  ARG*     3.6     4.7    +      -       -      +
    266S  ALA*     3.6    14.6    -      -       -      +
    268S  ILE*     5.9     0.4    -      -       -      -
    323S  LEU*     4.3    10.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 257 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133S  VAL*     3.7    21.9    -      -       -      +
    134S  LYS      4.5     4.0    -      -       -      +
    253S  ALA*     2.9    17.7    +      -       -      +
    254S  SER*     3.0     9.8    +      -       -      +
    256S  GLY*     1.3    75.8    -      -       -      +
    258S  TRP*     1.3    64.7    +      -       -      +
    260S  ARG*     3.0    59.6    +      -       -      +
    261S  ASP*     3.3    15.3    +      -       -      +
    310S  ARG*     2.8    40.5    +      -       -      +
    323S  LEU*     4.2     7.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 258 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101S  VAL*     3.5    30.1    -      -       +      -
    102S  GLY*     3.8    15.2    -      -       -      +
    103S  PRO*     3.2    36.3    -      -       +      -
    126S  ALA*     4.4    12.7    -      -       +      +
    127S  GLY*     6.1     0.4    -      -       -      -
    254S  SER      2.9    10.3    +      -       -      +
    255S  ILE      3.3    12.1    -      -       -      +
    256S  GLY      3.2     0.4    -      -       -      -
    257S  GLU*     1.3    77.3    -      -       -      +
    259S  PHE*     1.3    95.1    +      +       -      +
    260S  ARG      3.3     0.7    +      -       -      -
    261S  ASP*     3.5     5.1    +      -       -      +
    262S  ASN*     3.0    54.1    +      -       +      +
    264S  LYS*     4.7    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 259 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102S  GLY      4.5     7.4    -      -       -      -
    103S  PRO*     4.5     7.0    -      -       +      -
    106S  LEU*     3.8    34.5    -      -       +      -
    202S  TYR*     3.3    45.8    -      +       +      -
    204S  VAL*     5.3     0.4    -      -       +      -
    232S  ILE*     4.4    12.8    -      -       +      -
    255S  ILE*     3.4    22.4    -      -       +      -
    256S  GLY*     3.4    15.9    -      -       -      +
    257S  GLU      3.2     0.2    -      -       -      -
    258S  TRP*     1.3   104.0    -      +       -      +
    260S  ARG*     1.3    59.8    +      -       -      +
    262S  ASN*     3.5     5.2    +      -       -      -
    263S  GLY      3.6     0.2    +      -       -      -
    264S  LYS*     2.8    45.3    +      -       +      +
    266S  ALA*     4.2    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 260 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134S  LYS      5.5     1.0    +      -       -      -
    136S  PRO*     3.5    21.1    -      -       -      +
    256S  GLY      3.6     3.3    +      -       -      +
    257S  GLU*     3.0    53.3    +      -       -      +
    259S  PHE*     1.3    81.4    -      -       -      +
    261S  ASP*     1.3    83.4    +      -       -      +
    262S  ASN      3.4     0.3    +      -       -      -
    263S  GLY      3.6     6.6    +      -       -      -
    264S  LYS      3.8     7.6    -      -       -      -
    310S  ARG      2.7    30.3    +      -       -      -
    312S  ALA      4.0    10.8    -      -       -      +
    314S  LEU*     3.4    32.4    -      -       +      +
    319S  GLY*     5.1     0.9    -      -       -      -
    321S  GLY*     3.6    19.7    +      -       -      +
    322S  SER      3.8    15.5    +      -       -      +
    323S  LEU*     4.0    16.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 261 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257S  GLU*     3.3    19.7    +      -       -      +
    258S  TRP*     3.5     4.8    +      -       -      +
    260S  ARG*     1.3   107.9    +      -       -      +
    262S  ASN*     1.3    66.3    +      -       -      +
    263S  GLY      3.3     3.8    +      -       -      -
    314S  LEU*     4.1     8.5    -      -       -      +
    318S  GLU*     4.7    15.7    -      -       +      +
    319S  GLY*     5.0     2.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 262 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258S  TRP*     3.0    62.5    +      -       +      +
    259S  PHE      3.5     2.9    +      -       -      +
    260S  ARG      3.2     0.8    -      -       -      -
    261S  ASP*     1.3    86.3    -      -       -      +
    263S  GLY*     1.3    58.8    +      -       -      +
    264S  LYS*     3.4    13.6    +      -       +      +
----------------------------------------------------------
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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