Contacts of the strand formed by residues 1833 - 1838 (chain A) in PDB entry 2IWO


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 ARG1833 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1832A  LEU*     1.3    80.2    -      -       -      +
   1834A  THR*     1.3    61.9    +      -       -      +
   1835A  VAL*     4.2     4.2    +      -       +      -
   1878A  LYS*     2.9    43.3    +      -       +      +
   1879A  LEU*     4.0     0.8    -      -       -      +
   1880A  ARG*     4.2     9.3    -      -       -      +
   1883A  ASP*     2.8    43.0    +      -       -      -
   1914A  MET      4.0     0.3    -      -       -      +
   1915A  GLN*     3.1     5.4    -      -       -      +
   1916A  VAL*     2.8    48.3    +      -       +      +
   1917A  VAL*     3.9     3.0    -      -       -      +
   1918A  ALA*     3.5    29.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR1834 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1832A  LEU*     4.8     4.5    -      -       -      +
   1833A  ARG*     1.3    73.0    -      -       -      +
   1835A  VAL*     1.3    72.4    +      -       -      +
   1836A  GLU*     5.6     4.5    -      -       +      -
   1878A  LYS*     5.5     3.6    -      -       -      +
   1913A  GLU*     4.4     6.1    -      -       +      -
   1914A  MET      3.6     4.5    -      -       -      +
   1915A  GLN*     3.2    30.5    +      -       +      +
   1894B  GLU*     3.7    37.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1835 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1833A  ARG*     4.4     7.2    -      -       +      +
   1834A  THR*     1.3    84.8    -      -       -      +
   1836A  GLU*     1.3    66.3    +      -       -      +
   1837A  MET*     4.1     9.4    -      -       +      -
   1876A  THR*     3.8    37.2    -      -       +      +
   1878A  LYS*     4.3    20.2    -      -       +      +
   1879A  LEU*     3.5    31.0    -      -       +      -
   1912A  ILE      3.7     0.7    -      -       -      +
   1913A  GLU*     3.3     6.8    -      -       -      +
   1914A  MET*     2.8    41.8    +      -       +      +
   1916A  VAL*     4.9     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1836 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1834A  THR*     4.5     4.7    +      -       +      -
   1835A  VAL*     1.3    77.9    -      -       -      +
   1837A  MET*     1.3    64.1    +      -       -      +
   1876A  THR*     4.6     4.3    -      -       -      +
   1911A  SER*     3.0    34.4    +      -       -      -
   1912A  ILE      3.7     1.1    -      -       -      -
   1913A  GLU*     3.5    26.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET1837 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1835A  VAL*     4.1     6.1    -      -       +      -
   1836A  GLU*     1.3    78.9    +      -       -      +
   1838A  LYS*     1.3    63.9    +      -       -      +
   1845A  LEU*     4.1    28.7    -      -       +      -
   1847A  ILE*     5.3     1.3    -      -       +      -
   1872A  VAL*     3.7    13.2    -      -       +      -
   1873A  ALA*     4.0    17.9    -      -       -      -
   1876A  THR*     3.6    18.4    -      -       +      -
   1879A  LEU*     3.8    22.2    -      -       +      -
   1910A  GLY      3.5     1.4    -      -       -      +
   1911A  SER*     3.6     1.9    -      -       -      -
   1912A  ILE*     2.8    49.5    +      -       +      +
   1914A  MET*     4.0    39.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS1838 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1836A  GLU      6.0     0.2    -      -       -      -
   1837A  MET*     1.3    77.8    -      -       -      +
   1839A  LYS*     1.3    66.7    +      -       -      +
   1845A  LEU*     5.0     0.4    -      -       -      -
   1872A  VAL*     3.4    20.3    -      -       -      +
   1910A  GLY      3.5    18.4    -      -       -      +
   1911A  SER*     4.5     9.4    -      -       -      +
----------------------------------------------------------
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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