Contacts of the helix formed by residues 282 - 287 (chain B) in PDB entry 3QKJ
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.
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 LEU 282 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
230B TRP* 3.4 5.1 + - - -
278B VAL* 4.4 14.6 - - + -
279B ALA* 3.1 19.2 + - + +
280B LEU 3.1 3.6 + - - -
281B GLY* 1.3 74.2 - - - +
283B PHE* 1.3 61.9 + - - +
285B GLN* 3.3 32.0 - - - +
286B HIS* 2.8 49.6 + - + +
345B ILE* 6.0 6.7 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 283 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
230B TRP* 3.5 25.6 - + - +
280B LEU* 3.5 17.9 - - + +
281B GLY 2.9 4.2 + - - +
282B LEU* 1.3 70.4 - - - +
284B SER* 1.3 61.4 - - - +
285B GLN* 3.1 2.8 + - - -
286B HIS 3.1 2.1 + - - -
287B PHE* 2.8 69.8 + + + +
302B MET* 3.9 8.1 - - - -
306B LEU* 3.9 13.7 - - + -
333B LEU* 3.8 20.0 - - + -
336B ALA* 3.7 38.1 - - + +
337B HIS* 3.7 25.8 - + + -
340B PHE* 3.8 13.5 - + + -
----------------------------------------------------------
Back to top of page
Residues in contact with SER 284 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
284A SER* 3.5 43.5 + - - -
285A GLN* 4.6 5.7 - - - +
337A HIS* 3.5 11.6 - - - -
283B PHE* 1.3 77.5 - - - +
285B GLN* 1.4 71.7 + - - +
286B HIS 3.5 0.5 + - - -
287B PHE* 4.1 3.0 + - - +
336B ALA 5.1 0.2 + - - -
337B HIS* 3.7 38.5 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLN 285 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
284A SER* 4.5 8.3 - - - +
285A GLN* 5.5 12.4 - - + +
281B GLY 4.8 0.3 - - - +
282B LEU* 3.3 43.4 - - - +
283B PHE 3.1 1.4 + - - -
284B SER* 1.4 90.5 + - - +
286B HIS* 1.3 79.4 + - + +
287B PHE 5.0 0.8 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 286 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
230B TRP* 3.7 30.2 - - + -
238B TRP* 3.8 52.3 - + + +
278B VAL* 3.6 35.3 - - + +
282B LEU* 2.8 34.5 + - + -
283B PHE 3.1 3.2 + - - -
285B GLN* 1.3 94.0 + - + +
287B PHE* 1.3 66.8 + - - +
288B ASN* 3.4 6.1 + - - +
298B TYR* 4.3 0.7 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 287 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
289A LEU* 5.7 4.5 - - + -
337A HIS* 3.6 35.7 + + - +
230B TRP* 3.8 5.3 - - + -
283B PHE* 2.8 44.2 + + + +
284B SER* 4.1 6.1 + - - +
285B GLN 5.0 1.0 - - - +
286B HIS* 1.3 76.8 - - - +
288B ASN* 1.3 56.6 + - - +
289B LEU* 3.9 25.4 - - + -
292B PHE* 3.7 44.0 - + + -
298B TYR* 3.7 21.5 - + - -
302B MET* 4.1 4.5 - - - -
333B LEU* 3.9 24.9 - - + -
337B HIS* 4.2 13.7 - + - -
----------------------------------------------------------
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