Contacts of the strand formed by residues 87 - 91 (chain X) in PDB entry 1T6B


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 VAL 87 (chain X).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81X  THR*     3.7    15.5    -      -       +      +
     83X  ALA      3.2    20.6    -      -       -      +
     84X  ASP      3.5     5.0    +      -       -      +
     85X  ASN      3.4     3.6    +      -       -      -
     86X  HIS*     1.3    80.6    -      -       -      +
     88X  THR*     1.3    71.2    +      -       -      +
     89X  MET*     4.3     1.8    -      -       +      +
     97X  ILE*     3.6    19.3    -      -       +      +
     98X  ASN*     3.6     3.6    -      -       -      -
     99X  LYS*     3.2    23.7    +      -       -      +
    118X  ILE*     3.8    17.3    -      -       +      -
    119X  GLN      3.2    13.5    -      -       -      +
    120X  TYR*     4.0     6.1    -      -       +      -
    132X  PHE*     3.6    28.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 88 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87X  VAL*     1.3    77.1    +      -       -      +
     89X  MET*     1.3    64.2    +      -       -      +
     90X  TRP*     3.4    36.6    -      -       +      -
     95X  GLU*     4.5     9.4    -      -       +      +
     97X  ILE      3.5    11.0    -      -       -      +
     98X  ASN*     4.0    18.3    +      -       -      +
     99X  LYS*     4.1     8.3    +      -       -      +
    118X  ILE*     3.5     1.9    -      -       -      -
    119X  GLN*     2.8    62.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 89 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79X  PHE*     3.8    28.0    -      -       +      -
     81X  THR*     5.2     2.0    -      -       -      -
     87X  VAL*     4.6     2.7    -      -       +      -
     88X  THR*     1.3    74.9    -      -       -      +
     90X  TRP*     1.3    67.1    +      -       -      +
     91X  VAL*     3.8    22.9    -      -       +      -
     95X  GLU*     3.3     5.9    -      -       -      +
     96X  VAL*     2.7    33.7    +      -       +      -
     97X  ILE*     2.9    43.8    +      -       +      +
    116X  ILE*     3.9    18.8    -      -       +      -
    117X  LYS      3.3    11.0    -      -       -      +
    118X  ILE*     3.7    22.4    -      -       +      -
    134X  LEU*     4.1    16.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 90 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88X  THR*     3.4    39.3    -      -       +      -
     89X  MET*     1.3    78.5    -      -       -      +
     91X  VAL*     1.3    67.3    +      -       -      +
     92X  ASP      4.3     0.2    -      -       -      -
     93X  ASP*     3.8    36.1    -      -       -      +
     94X  GLN      3.1     5.2    -      -       -      +
     95X  GLU*     3.4    32.8    +      -       +      +
    115X  GLN      4.4     0.7    -      -       -      -
    116X  ILE*     3.6     3.1    -      -       -      -
    117X  LYS*     3.0    58.2    +      -       +      +
    119X  GLN*     3.8    23.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 91 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69X  ILE*     4.9     1.8    -      -       +      -
     79X  PHE*     4.1    17.9    -      -       +      -
     89X  MET*     3.8    15.7    -      -       +      -
     90X  TRP*     1.3    77.7    -      -       -      +
     92X  ASP*     1.3    72.8    +      -       +      +
     94X  GLN*     2.9    24.9    +      -       -      +
     96X  VAL*     4.3    14.8    -      -       +      -
    106X  ILE*     4.2    19.7    -      -       +      +
    108X  LEU*     4.4    11.7    -      -       +      -
    114X  TYR*     4.4    18.2    -      -       +      -
    115X  GLN      3.3     6.7    -      -       -      +
    116X  ILE*     3.7    19.3    -      -       +      -
----------------------------------------------------------
 Back to top of page


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