Contacts of the helix formed by residues 5017 - 5041 (chain f) in PDB entry 2AXT


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 THR5017 (chain f).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5007e  GLU*     3.3    31.4    +      -       +      +
   5008e  ARG*     5.5     4.0    -      -       +      -
   5014f  PRO*     5.3    13.0    -      -       +      +
   5015f  ILE      5.0     4.3    -      -       -      +
   5016f  PHE*     1.3    74.9    -      -       -      +
   5018f  VAL*     1.3    81.8    +      -       -      +
   5019f  ARG*     3.1    13.8    +      -       +      +
   5020f  TRP*     2.9    34.4    +      -       +      +
   5021f  VAL*     3.2    11.3    +      -       -      +
   5051f  HEM      4.2     8.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL5018 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5021d  TRP*     5.3     5.2    -      -       +      -
   5026d  ARG*     3.6    53.8    -      -       +      +
   5027d  PHE      5.5     0.2    -      -       -      +
   5028d  VAL*     5.3     5.2    -      -       +      +
   5030d  VAL*     4.8     9.4    -      -       +      -
   5007e  GLU*     5.2     1.6    -      -       -      +
   5017f  THR*     1.3    82.1    +      -       -      +
   5019f  ARG*     1.3    78.0    +      -       +      +
   5021f  VAL*     2.9    31.0    +      -       +      +
   5022f  ALA*     3.2     7.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG5019 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5484c  UNK      5.3     0.9    -      -       +      -
   5027d  PHE*     3.4    49.4    -      -       +      -
   5028d  VAL*     5.0     7.4    -      -       +      +
   5006e  GLY      5.5     0.2    +      -       -      -
   5007e  GLU*     3.6    26.2    +      -       -      +
   5008e  ARG*     2.7    35.1    +      -       -      +
   5009e  PRO*     4.9     0.8    -      -       -      +
   5010e  PHE*     3.0    37.3    -      -       -      +
   5017f  THR*     3.1     5.1    +      -       -      +
   5018f  VAL*     1.3    87.3    -      -       +      +
   5020f  TRP*     1.3    54.1    +      -       -      +
   5022f  ALA*     3.2     7.1    +      -       -      +
   5023f  VAL*     2.8    43.5    +      -       +      +
   5051f  HEM      2.7    38.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP5020 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5015f  ILE      4.2     7.9    -      -       -      +
   5016f  PHE*     3.8    36.1    -      +       +      -
   5017f  THR*     2.9    28.1    +      -       +      +
   5019f  ARG*     1.3    79.0    -      -       -      +
   5021f  VAL*     1.3    78.6    +      -       +      +
   5023f  VAL*     4.5     2.7    -      -       -      -
   5024f  HIS*     3.0    65.3    +      +       +      +
   5051f  HEM      3.0    81.4    -      +       +      +
----------------------------------------------------------
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Residues in contact with VAL5021 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5017f  THR      3.6    13.5    -      -       -      +
   5018f  VAL*     2.9    17.1    +      -       +      +
   5020f  TRP*     1.3    94.8    -      -       +      +
   5022f  ALA*     1.3    56.0    +      -       -      +
   5024f  HIS*     4.0     2.6    -      -       -      +
   5025f  THR*     2.7    43.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA5022 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5484c  UNK      3.8    20.4    -      -       +      -
   5485c  UNK      5.2     4.0    -      -       +      -
   5028d  VAL*     5.4     7.0    -      -       +      -
   5018f  VAL      3.2     6.3    +      -       -      +
   5019f  ARG*     3.2    12.5    +      -       +      +
   5021f  VAL*     1.3    75.3    -      -       -      +
   5023f  VAL*     1.3    55.2    +      -       -      +
   5024f  HIS      2.6    17.5    +      -       -      -
   5025f  THR*     2.8    26.8    +      -       -      -
   5026f  LEU*     3.5     7.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL5023 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5484c  UNK      3.9    27.1    -      -       +      +
   5010e  PHE*     3.9    20.6    -      -       +      -
   5019f  ARG*     2.8    38.3    +      -       +      +
   5020f  TRP*     4.1     6.5    -      -       -      +
   5022f  ALA*     1.3    70.1    -      -       -      +
   5024f  HIS*     1.3    60.8    +      -       -      +
   5026f  LEU*     4.4     3.4    -      -       -      +
   5027f  ALA*     3.0    24.5    +      -       +      +
   5051f  HEM      4.3    32.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS5024 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5020f  TRP*     3.0    52.3    +      +       +      +
   5021f  VAL*     4.0     3.8    -      -       -      +
   5022f  ALA      2.6     6.5    +      -       -      -
   5023f  VAL*     1.3    79.8    +      -       -      +
   5025f  THR*     1.3    59.8    +      -       +      +
   5026f  LEU      3.0     2.5    -      -       -      -
   5027f  ALA*     4.0     2.9    -      -       -      -
   5028f  VAL*     2.8    45.9    +      -       +      +
   5051f  HEM      2.3    92.0    +      +       +      -
----------------------------------------------------------
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Residues in contact with THR5025 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5042d  TYR*     2.6    49.3    +      -       +      +
   5021f  VAL*     2.7    34.7    +      -       +      +
   5022f  ALA*     2.8    21.9    +      -       -      -
   5024f  HIS*     1.3    76.2    -      -       -      +
   5026f  LEU*     1.3    62.1    +      -       -      +
   5028f  VAL*     5.3     0.4    -      -       -      -
   5029f  PRO*     2.9    16.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU5026 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5564a  PQ9      5.8     6.5    -      -       +      -
   5484c  UNK      5.1     7.2    -      -       +      -
   5485c  UNK      5.0    16.4    -      -       +      -
   5042d  TYR*     3.3    35.2    -      -       +      -
   5045d  LEU*     5.0     6.5    -      -       +      -
   5357d  BCR      4.5     8.1    -      -       +      +
   5359d  MGE      3.9    32.3    -      -       +      -
   5022f  ALA      3.5     7.9    +      -       -      +
   5023f  VAL*     4.9     2.5    -      -       -      +
   5024f  HIS      3.0     0.2    -      -       -      -
   5025f  THR*     1.3    85.2    -      -       -      +
   5027f  ALA*     1.3    58.2    +      -       -      +
   5028f  VAL      3.5     0.4    -      -       -      -
   5029f  PRO*     3.7     1.5    -      -       -      +
   5030f  THR*     2.6    36.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA5027 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5359d  MGE      5.8     0.7    -      -       -      -
   5023f  VAL*     3.0    21.8    +      -       +      +
   5024f  HIS*     3.2     5.8    +      -       -      +
   5026f  LEU*     1.3    78.2    -      -       -      +
   5028f  VAL*     1.3    64.8    +      -       -      +
   5030f  THR*     3.6     3.7    +      -       -      -
   5031f  ILE*     3.3    30.7    +      -       -      +
   5051f  HEM      3.3    42.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL5028 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5030e  LEU*     3.4    34.2    -      -       +      +
   5024f  HIS*     2.8    40.8    +      -       +      +
   5025f  THR*     5.3     0.2    -      -       -      -
   5027f  ALA*     1.3    71.7    -      -       -      +
   5029f  PRO*     1.3    75.1    -      -       +      +
   5032f  PHE*     3.1    20.2    +      -       +      +
   5051f  HEM      4.2    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO5029 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5042d  TYR*     3.7     9.4    -      -       -      +
   5357d  BCR      3.5    32.8    -      -       +      -
   5025f  THR*     2.9    32.5    -      -       -      +
   5026f  LEU      3.7     1.6    -      -       -      -
   5028f  VAL*     1.3    97.6    -      -       +      +
   5030f  THR*     1.3    68.6    +      -       -      +
   5032f  PHE*     3.0     9.2    +      -       +      +
   5033f  PHE*     2.9    29.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with THR5030 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5357d  BCR      3.6    35.1    -      -       +      +
   5359d  MGE      3.5    20.0    -      -       +      +
   5026f  LEU      2.6    23.3    +      -       -      -
   5027f  ALA*     3.7     5.8    -      -       -      -
   5028f  VAL      3.3     0.2    -      -       -      -
   5029f  PRO*     1.3    77.0    -      -       -      +
   5031f  ILE*     1.3    61.6    +      -       +      +
   5033f  PHE*     2.6    26.5    +      -       -      +
   5034f  LEU*     2.7    37.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE5031 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5027e  ILE*     3.5    39.5    -      -       +      +
   5030e  LEU*     3.8     4.9    -      -       +      -
   5031e  PHE*     3.7    21.9    -      -       +      +
   5027f  ALA      3.3    18.2    +      -       -      +
   5028f  VAL      4.0     2.7    -      -       -      +
   5030f  THR*     1.3    80.9    -      -       +      +
   5032f  PHE*     1.3    64.2    +      -       -      +
   5034f  LEU*     3.7    20.3    -      -       +      +
   5035f  GLY*     2.9    21.3    +      -       -      -
   5051f  HEM      3.4    29.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE5032 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5054d  PHE*     4.9     2.9    -      +       -      -
   5030e  LEU*     4.0    21.5    -      -       +      +
   5033e  ALA*     3.9    12.1    -      -       +      -
   5034e  GLY*     3.2    40.6    -      -       -      -
   5037e  PHE*     3.7    40.8    -      +       +      -
   5028f  VAL*     3.1    14.5    +      -       +      +
   5029f  PRO*     3.0    13.2    +      -       +      +
   5030f  THR      3.0     0.4    -      -       -      -
   5031f  ILE*     1.3    76.0    -      -       -      +
   5033f  PHE*     1.3    82.2    +      +       -      +
   5035f  GLY*     3.5     0.5    +      -       -      -
   5036f  ALA*     3.1    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE5033 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5049d  LEU      3.4    24.2    -      -       -      -
   5050d  THR*     4.0    13.5    -      -       +      -
   5053d  THR*     4.0    23.3    -      -       +      -
   5054d  PHE*     3.9    18.8    -      +       -      -
   5357d  BCR      3.5    57.2    -      -       +      -
   5029f  PRO*     2.9    20.2    +      -       +      +
   5030f  THR      2.6    13.3    +      -       -      +
   5032f  PHE*     1.3    89.3    -      +       -      +
   5034f  LEU*     1.3    52.4    +      -       -      +
   5035f  GLY      2.9     4.5    -      -       -      -
   5036f  ALA*     2.7     9.7    +      -       -      -
   5037f  ILE*     2.6    40.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU5034 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5357d  BCR      4.0    31.2    -      -       +      -
   5031e  PHE*     3.4     8.3    -      -       +      -
   5030f  THR*     2.7    41.5    +      -       +      +
   5031f  ILE*     3.8    18.8    -      -       +      +
   5033f  PHE*     1.3    73.3    -      -       -      +
   5035f  GLY*     1.3    57.4    +      -       -      +
   5037f  ILE*     4.5     4.7    -      -       +      -
   5038f  ALA*     3.0    28.8    +      -       -      +
   5024j  ILE*     3.2    33.8    -      -       +      +
   5028j  PHE*     3.8    20.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY5035 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5031e  PHE*     3.3    35.8    -      -       -      -
   5035e  TRP*     3.6    16.8    -      -       -      -
   5031f  ILE      2.9    11.0    +      -       -      -
   5032f  PHE      3.8     0.9    -      -       -      -
   5033f  PHE      2.9     1.0    -      -       -      -
   5034f  LEU*     1.3    78.2    -      -       -      +
   5036f  ALA*     1.3    62.9    +      -       -      +
   5038f  ALA*     3.6     0.3    +      -       -      +
   5039f  ALA*     3.2    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA5036 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5054d  PHE*     3.9    23.1    -      -       +      -
   5034e  GLY*     3.6    17.9    -      -       -      +
   5037e  PHE*     5.0     1.8    -      -       +      -
   5038e  VAL*     3.3    27.0    -      -       +      +
   5032f  PHE*     3.1    14.7    +      -       +      +
   5033f  PHE*     2.7    13.7    +      -       -      +
   5035f  GLY*     1.3    70.2    -      -       -      +
   5037f  ILE*     1.3    60.7    +      -       +      +
   5039f  ALA*     3.0    21.8    +      -       -      +
   5040f  MET*     3.2     7.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE5037 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5053d  THR*     3.9    15.0    -      -       +      +
   5067d  TYR*     3.5    33.2    -      -       +      -
   5357d  BCR      3.7    30.5    -      -       +      -
   5359d  MGE      3.9    18.6    -      -       -      +
   5033f  PHE*     2.6    22.8    +      -       +      +
   5034f  LEU*     4.3     1.3    -      -       -      +
   5036f  ALA*     1.3    68.9    -      -       +      +
   5038f  ALA*     1.3    61.4    +      -       -      +
   5039f  ALA      3.0     5.4    +      -       -      -
   5040f  MET*     3.2    24.2    +      -       +      +
   5041f  GLN*     3.1    16.6    -      -       -      +
   5028j  PHE*     3.1    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA5038 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5031e  PHE*     3.7    22.9    -      -       +      -
   5035e  TRP*     3.7     5.3    -      -       +      -
   5034f  LEU      3.0    22.6    +      -       -      +
   5035f  GLY      3.9     0.7    -      -       -      +
   5036f  ALA      3.3     0.2    -      -       -      -
   5037f  ILE*     1.3    77.3    -      -       -      +
   5039f  ALA*     1.3    58.1    +      -       -      +
   5040f  MET      3.4     0.2    -      -       -      -
   5041f  GLN*     3.4    14.0    -      -       -      +
   5042f  PHE*     3.4    17.7    -      -       -      -
   5024j  ILE*     4.7     4.5    -      -       +      -
   5027j  LEU*     3.5    21.0    -      -       +      +
   5028j  PHE*     3.8    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA5039 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5035e  TRP*     3.6    46.3    -      -       +      +
   5038e  VAL*     4.0    10.6    -      -       +      +
   5039e  SER*     4.9     1.6    -      -       -      +
   5035f  GLY      3.2    13.1    +      -       -      +
   5036f  ALA      3.0    13.6    +      -       -      +
   5038f  ALA*     1.3    78.5    -      -       -      +
   5040f  MET*     1.3    60.9    +      -       -      +
   5041f  GLN      3.3     0.6    +      -       -      -
   5042f  PHE*     3.5    16.5    +      -       -      +
   5043f  ILE*     4.0     5.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET5040 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   5053d  THR*     3.6    12.6    -      -       -      +
   5054d  PHE*     3.6    22.9    -      -       +      -
   5067d  TYR*     3.8    13.7    -      -       -      -
   5068d  LEU*     3.4    50.0    -      -       +      -
   5359d  MGE      3.7    18.6    +      -       -      +
   5038e  VAL*     3.8    10.8    -      -       +      -
   5036f  ALA      3.3    10.1    -      -       -      +
   5037f  ILE*     3.2    19.5    +      -       +      +
   5039f  ALA*     1.3    73.9    -      -       -      +
   5041f  GLN*     1.3    52.9    +      -       -      +
   5042f  PHE      2.5    18.8    +      -       -      -
   5043f  ILE*     2.5    47.2    +      -       +      +
   5036j  LEU*     5.5     1.4    +      -       -      +
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Residues in contact with GLN5041 (chain f). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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   5359d  MGE      2.8    46.0    +      -       -      +
   5037f  ILE*     3.1    11.3    -      -       -      +
   5038f  ALA*     3.4    21.5    -      -       -      +
   5039f  ALA      3.3     0.6    -      -       -      -
   5040f  MET*     1.3    72.6    -      -       -      +
   5042f  PHE*     1.3    70.1    +      -       +      +
   5043f  ILE      4.8     1.3    -      -       -      -
   5027j  LEU*     3.9    29.2    -      -       +      +
   5028j  PHE*     3.0    27.2    +      -       +      -
   5030j  TYR*     4.3    13.4    -      -       +      -
   5031j  GLY*     3.3    15.4    -      -       -      -
   5034j  ALA*     5.4     0.7    -      -       -      +
   5035j  GLY*     4.5    12.8    -      -       -      -
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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