Contacts of the helix formed by residues 2002 - 2026 (chain B) in PDB entry 1V9P


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 THR2002 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2001B  MET*     1.3    77.4    -      -       -      +
   2003B  ARG*     1.3    65.2    +      -       -      +
   2004B  GLU*     3.4    14.1    +      -       +      +
   2005B  GLU*     3.0    50.6    +      -       +      +
   2006B  ALA*     2.9    26.7    +      -       -      +
   2051B  PHE*     4.4     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG2003 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2002B  THR*     1.3    78.9    +      -       -      +
   2004B  GLU*     1.3    59.6    +      -       -      +
   2006B  ALA*     3.1     2.7    +      -       -      +
   2007B  ARG*     2.9    32.2    +      -       -      +
   2051B  PHE*     4.2    15.5    -      -       +      -
   2053B  GLU*     3.7    34.0    +      -       -      +
   2054B  PHE*     3.6    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU2004 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2002B  THR*     3.2    12.4    +      -       +      +
   2003B  ARG*     1.3    83.0    -      -       -      +
   2005B  GLU*     1.3    56.9    +      -       +      +
   2007B  ARG*     2.4    45.5    +      -       -      +
   2008B  ARG*     3.2    28.7    +      -       -      +
   2130B  GLU*     5.7     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU2005 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2001B  MET*     3.3    20.6    -      -       +      +
   2002B  THR*     3.0    42.9    +      -       +      +
   2004B  GLU*     1.3    76.7    -      -       +      +
   2006B  ALA*     1.3    60.8    +      -       -      +
   2008B  ARG*     3.7     6.7    +      -       -      +
   2009B  ARG*     2.8    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA2006 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2001B  MET*     3.6    12.0    -      -       -      -
   2002B  THR      2.9    13.2    +      -       -      +
   2003B  ARG      3.4     8.1    -      -       -      +
   2005B  GLU*     1.3    72.5    -      -       -      +
   2007B  ARG*     1.3    68.2    +      -       -      +
   2009B  ARG*     2.7    14.0    +      -       -      +
   2010B  ILE*     2.8    20.5    +      -       +      +
   2047B  LEU*     4.9     2.9    -      -       +      -
   2051B  PHE*     3.4    44.6    -      -       +      -
   2054B  PHE*     4.1     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG2007 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2003B  ARG      2.9    11.0    +      -       -      +
   2004B  GLU*     2.4    41.6    +      -       -      +
   2006B  ALA*     1.3    74.1    -      -       -      +
   2008B  ARG*     1.3    56.3    +      -       -      +
   2010B  ILE*     2.8    22.4    +      -       -      +
   2011B  ASN*     2.7    29.1    +      -       -      +
   2054B  PHE*     3.5    46.3    -      -       +      -
   2129B  GLU*     3.1    36.0    +      -       -      +
   2130B  GLU*     3.0    48.1    +      -       -      +
   2168B  ARG*     6.1     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG2008 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2004B  GLU*     3.2    19.4    +      -       -      +
   2005B  GLU*     3.9     5.8    -      -       -      +
   2006B  ALA      3.2     0.4    -      -       -      -
   2007B  ARG*     1.3    82.9    -      -       -      +
   2009B  ARG*     1.3    60.0    +      -       -      +
   2011B  ASN*     3.1    12.8    +      -       -      +
   2012B  GLU*     3.1    43.1    +      -       -      +
   2130B  GLU*     3.7    52.5    +      -       +      +
   2132B  VAL*     6.4     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG2009 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2001B  MET*     4.7    11.5    -      -       +      +
   2005B  GLU      2.8    18.7    +      -       -      +
   2006B  ALA*     2.7    10.7    +      -       -      +
   2008B  ARG*     1.3    71.4    -      -       -      +
   2010B  ILE*     1.3    63.7    +      -       -      +
   2012B  GLU*     3.4    16.4    +      -       -      +
   2013B  LEU*     2.9    34.6    +      -       +      +
   2043B  GLU*     2.4    43.0    +      -       -      +
   2047B  LEU*     3.4    28.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE2010 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2006B  ALA*     2.8    15.7    +      -       +      +
   2007B  ARG*     2.8     7.5    +      -       -      +
   2009B  ARG*     1.3    74.1    -      -       -      +
   2011B  ASN*     1.3    67.4    +      -       -      +
   2012B  GLU      3.0     0.2    +      -       -      -
   2013B  LEU*     3.0     7.2    +      -       -      +
   2014B  ARG*     3.0    57.6    +      -       -      +
   2044B  LEU*     3.9    11.2    -      -       +      -
   2047B  LEU*     4.3    20.2    -      -       +      +
   2048B  GLU*     4.2    26.5    -      -       +      +
   2051B  PHE*     4.9     1.3    -      -       +      +
   2054B  PHE*     3.4    39.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN2011 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2007B  ARG*     2.7    38.8    +      -       -      +
   2008B  ARG*     3.1    20.7    -      -       -      +
   2010B  ILE*     1.3    78.0    -      -       -      +
   2012B  GLU*     1.3    61.5    +      -       +      +
   2014B  ARG*     3.6     7.6    +      -       -      +
   2015B  ASP*     3.3    24.1    +      -       -      +
   2129B  GLU*     3.3    23.4    +      -       -      +
   2130B  GLU*     4.8     3.4    -      -       -      +
   2132B  VAL*     4.1    20.7    -      -       +      +
   2133B  LEU      4.6     3.4    -      -       -      +
   2134B  VAL*     3.9    22.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU2012 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2008B  ARG*     3.1    36.8    +      -       -      +
   2009B  ARG*     3.4    20.7    +      -       -      +
   2010B  ILE      3.1     0.6    -      -       -      -
   2011B  ASN*     1.3    79.1    -      -       -      +
   2013B  LEU*     1.3    66.2    +      -       +      +
   2015B  ASP*     3.9     1.6    -      -       -      +
   2016B  LEU*     3.0    33.0    +      -       +      +
   2132B  VAL*     4.2    21.9    -      -       +      +
   2161B  ARG*     4.0    24.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU2013 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2009B  ARG*     2.9    60.4    +      -       +      +
   2010B  ILE*     3.0     4.5    +      -       -      +
   2012B  GLU*     1.3    76.3    -      -       +      +
   2014B  ARG*     1.3    58.3    +      -       -      +
   2016B  LEU*     3.4     9.5    +      -       +      +
   2017B  ILE*     2.9    36.5    +      -       -      +
   2040B  LEU*     3.8    45.1    -      -       +      +
   2043B  GLU*     3.2    22.4    -      -       +      +
   2044B  LEU*     3.9    23.1    -      -       +      +
   2047B  LEU*     5.3     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG2014 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2010B  ILE*     3.0    32.0    +      -       -      +
   2011B  ASN*     3.9     7.1    +      -       -      +
   2013B  LEU*     1.3    71.7    -      -       -      +
   2015B  ASP*     1.3    67.7    +      -       -      +
   2017B  ILE*     2.9     5.2    +      -       -      +
   2018B  ARG*     2.7    63.2    +      -       -      +
   2044B  LEU*     3.9    21.1    -      -       +      -
   2048B  GLU*     2.8    26.8    +      -       -      -
   2054B  PHE      2.6    30.1    +      -       -      -
   2055B  LYS      3.9     1.4    -      -       -      -
   2056B  SER*     3.7    25.4    +      -       -      -
   2058B  ASP*     5.1     2.2    -      -       -      +
   2059B  SER*     3.5    13.9    -      -       -      +
   2060B  PRO*     4.0     4.0    -      -       +      -
   2134B  VAL*     5.1    13.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP2015 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2011B  ASN      3.3    15.4    +      -       -      +
   2012B  GLU      3.9     2.5    -      -       -      +
   2014B  ARG*     1.3    78.2    -      -       -      +
   2016B  LEU*     1.3    63.0    +      -       -      +
   2018B  ARG*     3.5    12.9    -      -       -      +
   2019B  TYR*     2.9    22.3    +      -       -      +
   2132B  VAL*     4.2    11.7    -      -       +      -
   2133B  LEU*     4.4    12.0    -      -       -      +
   2153B  LEU*     4.9     4.2    -      -       -      +
   2160B  ARG*     2.9    44.8    +      -       -      +
   2161B  ARG*     2.3    37.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU2016 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2012B  GLU*     3.0    31.2    +      -       +      +
   2013B  LEU*     3.5    11.4    -      -       +      +
   2015B  ASP*     1.3    76.9    -      -       -      +
   2017B  ILE*     1.3    62.8    +      -       -      +
   2019B  TYR*     3.1     6.3    +      -       +      +
   2020B  HIS*     3.0    49.5    +      -       +      +
   2040B  LEU*     4.5    23.3    -      -       +      -
   2160B  ARG*     5.0     4.7    -      -       -      +
   2161B  ARG*     4.1    25.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE2017 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2013B  LEU      2.9    16.6    +      -       -      +
   2014B  ARG      2.9     4.9    +      -       -      +
   2016B  LEU*     1.3    74.2    -      -       -      +
   2018B  ARG*     1.3    56.4    +      -       -      +
   2020B  HIS*     5.1     1.1    -      -       -      -
   2021B  ASN*     3.0    30.8    +      -       -      +
   2037B  TYR*     3.6    34.0    -      -       +      +
   2040B  LEU*     3.5    51.8    -      -       +      +
   2041B  LEU*     3.6    19.5    -      -       +      +
   2044B  LEU*     3.7    16.6    -      -       +      -
   2060B  PRO*     3.9    20.9    -      -       +      -
   2069B  LEU*     4.7     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG2018 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2014B  ARG*     2.7    73.7    +      -       -      +
   2015B  ASP*     3.5     8.7    -      -       -      +
   2017B  ILE*     1.3    71.8    -      -       -      +
   2019B  TYR*     1.3    65.8    +      -       -      +
   2021B  ASN*     3.1     1.9    +      -       -      +
   2022B  TYR*     3.0    20.5    +      -       -      +
   2058B  ASP*     3.4    29.7    +      -       -      +
   2060B  PRO*     4.1    14.5    -      -       +      +
   2069B  LEU*     4.3     5.2    -      -       +      -
   2133B  LEU*     4.7     4.8    +      -       -      +
   2134B  VAL*     2.6    32.5    +      -       -      +
   2149B  THR*     3.8    27.1    +      -       -      +
   2150B  GLN*     3.3    28.8    -      -       +      +
   2153B  LEU*     4.0    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR2019 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2015B  ASP      2.9    17.1    +      -       -      +
   2016B  LEU*     3.5     4.9    -      -       +      +
   2018B  ARG*     1.3    76.6    -      -       -      +
   2020B  HIS*     1.3    87.7    +      +       -      +
   2022B  TYR*     2.9    40.8    +      +       -      +
   2023B  ARG*     2.9    40.6    +      -       +      +
   2031B  GLU*     2.9    29.6    +      -       -      -
   2153B  LEU*     4.7     4.9    -      -       +      +
   2160B  ARG*     3.1    51.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS2020 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2016B  LEU*     3.0    44.8    +      -       +      +
   2017B  ILE*     4.6     1.8    -      -       -      +
   2019B  TYR*     1.3   100.8    -      +       -      +
   2021B  ASN*     1.3    64.2    +      -       -      +
   2023B  ARG*     3.7     9.6    -      -       +      +
   2024B  TYR*     3.0    22.9    +      -       -      +
   2030B  PRO*     5.6     1.8    -      -       +      +
   2031B  GLU*     4.0    27.8    +      -       +      +
   2032B  ILE*     3.3    44.8    -      -       +      +
   2037B  TYR*     4.5    11.9    -      -       +      -
   2040B  LEU*     4.4     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN2021 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2017B  ILE      3.0    22.1    +      -       -      +
   2018B  ARG      3.1     5.4    +      -       -      +
   2020B  HIS*     1.3    76.1    -      -       -      +
   2022B  TYR*     1.3    58.3    +      -       -      +
   2024B  TYR*     3.3     3.1    +      -       -      -
   2025B  TYR*     3.0    48.7    +      -       -      +
   2026B  VAL*     6.1     0.2    -      -       -      +
   2037B  TYR*     2.7    32.2    +      -       -      +
   2065B  GLY      5.3     1.4    +      -       -      -
   2067B  ARG      3.9     4.6    +      -       -      -
   2068B  PRO*     4.0     1.7    -      -       -      +
   2069B  LEU*     3.0    49.4    +      -       +      +
   2150B  GLN*     4.3     2.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR2022 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2018B  ARG      3.0    11.6    +      -       -      +
   2019B  TYR*     2.9    33.6    +      +       -      +
   2021B  ASN*     1.3    74.6    +      -       -      +
   2023B  ARG*     1.3    68.5    +      -       +      +
   2024B  TYR      3.0     1.6    -      -       -      -
   2026B  VAL*     3.0    62.1    +      -       +      +
   2027B  LEU*     3.0    42.0    +      -       +      +
   2150B  GLN*     4.7    11.4    +      -       -      +
   2153B  LEU*     3.9    19.8    +      -       +      -
   2154B  THR*     3.9    30.4    +      -       +      -
   2156B  PRO*     5.2    10.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG2023 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2019B  TYR*     2.9    51.4    +      -       +      +
   2020B  HIS*     3.4    13.7    +      -       -      +
   2022B  TYR*     1.3    77.6    -      -       +      +
   2024B  TYR*     1.3    52.7    +      -       -      +
   2027B  LEU*     3.3    31.4    -      -       -      +
   2028B  ALA      2.5    31.5    +      -       -      -
   2029B  ASP*     2.9    50.4    +      -       -      +
   2030B  PRO*     4.2     7.6    -      -       +      -
   2031B  GLU*     2.6    49.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR2024 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2020B  HIS      3.0    13.2    +      -       -      +
   2021B  ASN*     3.3     9.6    -      -       -      +
   2022B  TYR      3.0     1.6    -      -       -      -
   2023B  ARG*     1.3    75.7    -      -       -      +
   2025B  TYR*     1.3   103.7    +      +       +      +
   2028B  ALA*     2.8    32.4    +      -       -      +
   2029B  ASP      4.8     0.7    -      -       -      +
   2030B  PRO*     4.8    22.9    -      -       +      +
   2034B  ASP*     3.7    26.0    +      -       +      -
   2037B  TYR*     5.9     5.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with TYR2025 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2021B  ASN*     3.0    41.1    +      -       -      +
   2024B  TYR*     1.3   114.0    -      +       +      +
   2026B  VAL*     1.3    61.0    +      -       +      +
   2028B  ALA*     5.8     0.2    -      -       -      -
   2034B  ASP*     5.7     0.7    +      -       -      -
   2037B  TYR*     5.5     3.6    -      +       -      -
   2065B  GLY      4.8     0.2    +      -       -      -
   2066B  ALA*     2.9    43.5    +      -       -      +
   2067B  ARG*     3.9     5.2    -      -       -      -
   2068B  PRO*     3.7    35.0    -      -       +      -
   2214B  ARG*     2.9    31.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL2026 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2021B  ASN*     5.1     0.4    -      -       -      +
   2022B  TYR*     3.0    49.7    +      -       +      +
   2025B  TYR*     1.3    83.2    -      -       +      +
   2027B  LEU*     1.3    65.6    +      -       +      +
   2068B  PRO*     6.1     1.1    -      -       +      -
   2150B  GLN*     6.1     1.1    -      -       -      +
   2154B  THR*     4.4     1.8    -      -       +      -
   2213B  PRO*     4.5    15.0    -      -       +      -
   2214B  ARG*     3.3    38.9    +      -       +      +
   2217B  ALA*     3.6    31.2    -      -       +      -
----------------------------------------------------------
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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