Contacts of the helix formed by residues 110 - 136 (chain L) in PDB entry 4XLN


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 THR 110 (chain L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108L  LEU      6.1     0.2    -      -       -      -
    109L  LEU*     1.3    78.5    -      -       -      +
    111L  LEU*     1.3    74.1    +      -       +      +
    112L  GLU*     3.4    10.3    +      -       -      +
    113L  GLU*     3.5    26.2    +      -       -      +
    114L  GLU*     3.1    19.6    +      -       -      +
    249L  LYS*     5.4     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 111 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349J  PRO*     4.3    18.4    -      -       +      -
    110L  THR*     1.3    82.9    -      -       -      +
    112L  GLU*     1.3    62.4    -      -       -      +
    114L  GLU*     3.2     6.7    +      -       -      +
    115L  ILE*     2.9    35.6    +      -       +      +
    249L  LYS*     4.0    31.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 112 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207J  PHE*     3.5    35.4    -      -       +      +
    209J  ARG*     3.9    26.8    +      -       -      +
    347J  VAL*     5.3     4.5    -      -       -      +
    348J  ALA      5.2     1.6    -      -       -      -
    349J  PRO*     3.7    39.1    -      -       +      +
    391J  ALA*     3.7    18.9    -      -       -      +
    110L  THR*     3.4     8.8    +      -       -      +
    111L  LEU*     1.3    78.3    -      -       -      +
    113L  GLU*     1.3    66.0    +      -       +      +
    115L  ILE*     3.3     1.7    +      -       -      +
    116L  ASP*     2.9    24.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 113 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207J  PHE*     3.8    20.4    -      -       +      -
    108L  LEU      4.2    10.5    -      -       -      +
    109L  LEU*     4.0    17.9    -      -       +      +
    110L  THR*     3.5    32.4    +      -       -      +
    111L  LEU      3.5     0.4    -      -       -      -
    112L  GLU*     1.3    77.1    -      -       +      +
    114L  GLU*     1.3    57.4    +      -       -      +
    116L  ASP*     3.6     2.4    -      -       -      +
    117L  LEU*     2.9    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 114 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109L  LEU*     3.7    24.6    -      -       +      +
    110L  THR      3.1    17.8    +      -       -      +
    111L  LEU*     3.5     7.6    -      -       -      +
    113L  GLU*     1.3    75.2    -      -       -      +
    115L  ILE*     1.3    77.1    +      -       +      +
    117L  LEU*     3.1     4.4    +      -       -      +
    118L  ALA*     2.9    24.4    +      -       +      +
    202L  LEU*     5.2     5.4    -      -       +      +
    206L  ASN*     4.4     4.0    -      -       -      +
    242L  PHE*     5.6     6.0    -      -       +      -
    248L  PHE      4.8     1.8    -      -       -      +
    249L  LYS*     3.2    41.1    -      -       -      +
    250L  PHE*     3.2    34.0    +      -       +      +
     30R    T      3.9     6.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 115 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349J  PRO*     4.1    21.3    -      -       +      +
    350J  HIS*     4.9    12.1    -      -       -      +
    351J  MET      5.7     2.0    -      -       -      +
    352J  ASN*     5.9     4.5    -      -       -      +
    371J  ILE*     6.5     0.7    -      -       +      -
    111L  LEU*     2.9    27.3    +      -       +      +
    112L  GLU      3.8     3.4    -      -       -      +
    114L  GLU*     1.3    87.6    -      -       +      +
    116L  ASP*     1.3    58.4    +      -       -      +
    118L  ALA*     3.4     2.7    +      -       -      +
    119L  ARG*     2.9    30.6    +      -       +      +
    242L  PHE*     6.3     1.1    -      -       +      -
    244L  TYR*     3.7    42.7    -      -       +      +
    247L  ARG*     6.0     6.1    -      -       -      -
    248L  PHE      5.9     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 116 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207J  PHE*     3.4    32.0    -      -       +      -
    352J  ASN*     6.1     2.2    -      -       +      -
    112L  GLU      2.9    17.3    +      -       -      +
    113L  GLU*     3.6     3.1    -      -       -      +
    115L  ILE*     1.3    77.1    -      -       -      +
    117L  LEU*     1.3    61.4    +      -       -      +
    119L  ARG*     3.1    31.0    +      -       -      +
    120L  LYS*     2.9    47.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 117 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109L  LEU*     3.7    28.9    -      -       +      -
    113L  GLU*     2.9    22.3    +      -       +      +
    114L  GLU*     3.4     5.4    -      -       -      +
    116L  ASP*     1.3    79.6    -      -       -      +
    118L  ALA*     1.3    63.8    -      -       -      +
    120L  LYS*     3.1    15.1    +      -       -      +
    121L  VAL*     2.9    27.9    +      -       -      +
    198L  ALA*     3.6    31.7    -      -       +      +
    201L  HIS*     4.0    18.2    -      -       +      +
    202L  LEU*     3.9    29.4    -      -       +      +
    205L  ALA*     5.2     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 118 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114L  GLU*     2.9    15.8    +      -       +      +
    115L  ILE      3.9     1.1    -      -       -      +
    117L  LEU*     1.3    75.7    -      -       -      +
    119L  ARG*     1.3    58.2    +      -       -      +
    121L  VAL*     3.1    10.2    +      -       -      +
    122L  GLU*     2.9    34.5    +      -       +      +
    202L  LEU*     4.2    11.1    -      -       +      +
    242L  PHE*     4.3    18.2    -      -       +      +
    244L  TYR*     3.7    32.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 119 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352J  ASN*     3.4    49.2    +      -       -      +
    353J  VAL      5.4     3.8    +      -       -      -
    115L  ILE*     2.9    20.8    +      -       +      +
    116L  ASP*     3.1    30.5    +      -       -      +
    118L  ALA*     1.3    75.7    -      -       -      +
    120L  LYS*     1.3    61.9    +      -       -      +
    122L  GLU*     3.6     1.4    +      -       -      +
    123L  GLU*     2.9    71.5    +      -       +      +
    244L  TYR*     3.2    37.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 120 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116L  ASP*     2.9    38.8    +      -       -      +
    117L  LEU*     3.1    11.5    +      -       -      +
    119L  ARG*     1.3    80.4    -      -       -      +
    121L  VAL*     1.3    56.9    +      -       -      +
    123L  GLU*     3.6    13.8    -      -       -      +
    124L  GLY      2.9    21.5    +      -       -      -
    191L  ILE*     4.6     1.5    -      -       -      +
    194L  GLU*     3.8    34.4    +      -       +      +
    195L  GLY*     3.2    20.1    +      -       -      +
    198L  ALA*     3.7    24.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 121 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117L  LEU      2.9    22.2    +      -       -      +
    118L  ALA*     3.1    10.7    +      -       -      +
    120L  LYS*     1.3    74.4    -      -       -      +
    122L  GLU*     1.3    64.6    +      -       +      +
    124L  GLY*     2.8    19.1    +      -       -      -
    125L  MET*     2.9    36.3    +      -       +      +
    143L  ARG*     5.6     0.7    -      -       -      +
    195L  GLY*     3.6    12.3    -      -       -      +
    198L  ALA*     3.7     4.5    -      -       +      +
    199L  ARG*     3.6    43.1    -      -       +      +
    202L  LEU*     4.6     7.0    -      -       +      -
    239L  VAL*     5.5     7.9    -      -       +      +
    240L  GLU*     6.2     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 122 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118L  ALA*     2.9    17.7    +      -       +      +
    119L  ARG      4.1     2.7    -      -       -      +
    121L  VAL*     1.3    78.8    -      -       +      +
    123L  GLU*     1.3    57.5    +      -       -      +
    125L  MET*     3.3    12.8    +      -       -      +
    126L  GLU*     2.9    52.0    +      -       -      +
    242L  PHE      3.5    22.3    -      -       -      +
    243L  GLU*     3.6    12.3    -      -       -      +
    244L  TYR*     3.2    40.2    +      -       +      +
    245L  LYS*     4.3    11.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 123 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119L  ARG*     2.9    59.9    +      -       +      +
    120L  LYS*     3.6    10.2    -      -       -      +
    122L  GLU*     1.3    76.9    -      -       -      +
    124L  GLY*     1.3    58.7    +      -       -      +
    126L  GLU*     3.5     5.9    +      -       -      +
    127L  ALA*     2.9    29.5    +      -       -      +
    188L  TYR*     5.8     0.3    -      -       -      -
    191L  ILE*     3.8    16.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 124 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120L  LYS      2.9    10.0    +      -       -      -
    121L  VAL      2.8     9.2    +      -       -      -
    123L  GLU*     1.3    77.4    -      -       -      +
    125L  MET*     1.3    54.7    +      -       -      -
    127L  ALA*     3.1     4.7    -      -       -      +
    128L  ILE*     2.9    32.8    +      -       -      +
    191L  ILE*     3.6    22.4    -      -       -      +
    192L  ALA*     3.7    13.4    -      -       -      -
    195L  GLY*     4.3     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 125 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121L  VAL*     2.9    36.6    +      -       +      +
    122L  GLU*     3.8    12.3    -      -       -      +
    124L  GLY*     1.3    73.9    -      -       -      +
    126L  GLU*     1.3    61.9    +      -       +      +
    128L  ILE*     3.1    15.3    +      -       -      +
    129L  LYS*     2.9    24.1    +      -       -      +
    139L  GLN*     5.2     0.7    -      -       -      +
    143L  ARG*     3.5    39.7    -      -       -      +
    240L  GLU*     4.8    25.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 126 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122L  GLU*     2.9    39.3    +      -       -      +
    123L  GLU*     4.1     5.6    -      -       -      +
    125L  MET*     1.3    73.7    -      -       +      +
    127L  ALA*     1.3    67.2    +      -       -      +
    129L  LYS*     3.0    17.8    +      -       +      +
    130L  LYS*     3.0    25.6    +      -       -      +
    188L  TYR*     5.5     1.1    -      -       -      -
    245L  LYS*     5.4     5.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 127 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123L  GLU      2.9    16.5    +      -       -      +
    124L  GLY*     3.1    12.3    -      -       -      +
    126L  GLU*     1.3    76.9    -      -       -      +
    128L  ILE*     1.3    56.6    +      -       -      +
    130L  LYS*     3.3     3.6    +      -       -      +
    131L  LEU*     2.9    34.2    +      -       -      +
    188L  TYR*     3.4    48.6    -      -       +      +
    191L  ILE*     3.9     9.0    -      -       +      -
    192L  ALA      4.1     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 128 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124L  GLY      2.9    21.8    +      -       -      +
    125L  MET*     3.1     9.2    +      -       -      +
    127L  ALA*     1.3    76.1    -      -       -      +
    129L  LYS*     1.3    57.7    +      -       -      +
    131L  LEU*     3.6     8.9    -      -       +      -
    132L  SER*     2.9    28.1    +      -       -      -
    139L  GLN*     3.5    33.0    -      -       +      +
    142L  ILE*     4.3    11.4    -      -       +      +
    143L  ARG*     3.8    51.4    -      -       +      +
    146L  VAL*     5.1     5.2    -      -       +      -
    192L  ALA*     3.8    19.3    -      -       +      +
    196L  GLU*     5.1     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 129 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125L  MET      2.9     9.8    +      -       -      +
    126L  GLU*     3.0    23.8    +      -       +      +
    128L  ILE*     1.3    76.7    -      -       -      +
    130L  LYS*     1.3    59.5    +      -       +      +
    132L  SER*     3.3    14.9    -      -       -      -
    133L  GLU*     3.5    23.2    +      -       -      +
    139L  GLN*     3.3    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 130 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126L  GLU      3.0    14.1    +      -       -      +
    127L  ALA      3.8     6.5    -      -       -      +
    129L  LYS*     1.3    72.9    -      -       +      +
    131L  LEU*     1.3    58.3    +      -       -      +
    132L  SER      3.0     4.3    -      -       -      -
    133L  GLU*     2.9    23.7    +      -       -      +
    134L  ALA*     2.9    24.0    +      -       -      +
    185L  LEU*     5.4     4.5    -      -       +      +
    188L  TYR*     3.4    45.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 131 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127L  ALA      2.9    21.3    +      -       -      +
    128L  ILE*     3.3    10.1    +      -       -      +
    130L  LYS*     1.3    75.0    -      -       -      +
    132L  SER*     1.3    60.2    +      -       -      +
    133L  GLU      3.3     0.2    -      -       -      -
    134L  ALA*     3.3    27.8    +      -       +      +
    135L  THR*     3.6     8.0    +      -       -      -
    142L  ILE*     3.4    29.3    -      -       +      +
    146L  VAL*     6.5     0.2    -      -       +      -
    178L  LEU*     4.2    14.3    -      -       +      +
    181L  LEU*     4.8     2.2    -      -       +      -
    185L  LEU*     3.6    29.6    -      -       +      +
    186L  LYS*     5.6     0.2    -      -       -      -
    188L  TYR*     3.5    33.4    -      -       +      +
    189L  LEU*     3.6    14.4    -      -       +      +
    192L  ALA*     4.5     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 132 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128L  ILE      2.9    10.7    +      -       -      -
    129L  LYS      3.3    13.2    -      -       -      -
    130L  LYS      3.0     0.2    -      -       -      -
    131L  LEU*     1.3    79.3    -      -       -      +
    133L  GLU*     1.3    59.2    +      -       -      +
    136L  GLY*     3.1     8.3    +      -       -      -
    137L  LEU      2.3    54.7    +      -       -      +
    138L  ASP      3.8     5.6    -      -       -      -
    139L  GLN*     3.1    28.6    +      -       -      -
    142L  ILE*     3.9     7.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 133 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129L  LYS*     3.5    32.8    +      -       -      +
    130L  LYS*     2.9    22.5    +      -       -      +
    132L  SER*     1.3    75.8    -      -       -      +
    134L  ALA*     1.3    67.3    +      -       -      +
    136L  GLY*     3.9     5.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 134 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130L  LYS      2.9     7.8    +      -       -      +
    131L  LEU*     3.3    24.9    -      -       +      +
    132L  SER      3.2     0.2    -      -       -      -
    133L  GLU*     1.3    80.3    -      -       -      +
    135L  THR*     1.3    62.5    +      -       +      +
    178L  LEU*     4.7     0.4    -      -       +      -
    181L  LEU*     3.7    27.5    -      -       +      +
    185L  LEU*     4.0    19.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 135 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131L  LEU      3.6     5.9    +      -       -      -
    134L  ALA*     1.3    77.7    -      -       -      +
    136L  GLY*     1.3    61.2    +      -       -      +
    137L  LEU*     3.3    30.1    -      -       -      +
    177L  LYS*     3.5    39.2    -      -       +      +
    178L  LEU*     3.5    31.8    -      -       +      +
    180L  SER*     5.3     0.2    -      -       -      +
    181L  LEU*     3.9    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 136 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132L  SER      3.1    12.1    +      -       -      -
    133L  GLU*     3.9     5.0    +      -       -      -
    134L  ALA      3.4     3.6    +      -       -      -
    135L  THR*     1.3    80.1    -      -       -      +
    137L  LEU*     1.3    64.0    +      -       -      +
----------------------------------------------------------
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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