Contacts of the helix formed by residues 316 - 321 (chain D) in PDB entry 2BKU
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 ASN 316 (chain D).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
214B ASN* 5.2 8.5 + - - +
297D GLU* 3.4 6.0 + - - -
313D GLN* 5.8 1.2 + - - -
314D SER* 2.9 31.1 + - - +
315D TYR* 1.3 81.4 + - - +
317D PHE* 1.3 59.8 + - - +
318D ALA 3.3 2.2 - - - -
319D LEU* 3.7 31.5 - - + +
320D SER* 2.8 33.3 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 317 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
252D MET* 4.4 5.6 - - + -
256D TYR* 3.7 30.5 - + - -
259D MET* 3.7 13.5 - - + -
260D LYS* 3.5 40.6 - - + -
263D MET* 3.5 38.1 - - + -
264D GLU* 5.7 1.3 - - + -
268D TYR* 6.2 2.5 - + - -
290D TRP* 4.0 6.1 - - + -
293D ILE* 3.8 16.2 - - + -
297D GLU* 2.7 21.8 + - - +
315D TYR* 3.2 25.3 + + + -
316D ASN* 1.3 74.4 - - - +
318D ALA* 1.3 59.3 + - - +
320D SER* 3.7 4.5 + - - -
321D SER* 2.7 32.2 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 318 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
290D TRP* 3.9 8.7 - - + -
293D ILE* 4.3 2.0 - - + +
294D CYS* 4.0 10.5 - - - -
297D GLU* 3.6 4.2 + - - +
317D PHE* 1.3 80.0 - - - +
319D LEU* 1.3 58.4 + - - +
321D SER* 2.9 16.6 + - - -
322D ILE* 3.2 11.1 + - - +
358D PHE* 3.4 33.7 - - + -
361D ASN* 3.4 28.3 - - - +
362D CYS* 4.0 5.6 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 319 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
297D GLU* 4.7 0.4 + - - -
316D ASN* 3.3 32.6 + - + +
318D ALA* 1.3 80.4 - - - +
320D SER* 1.3 61.2 + - - +
321D SER 3.2 1.0 + - - -
322D ILE* 3.4 28.3 + - + +
362D CYS* 3.9 17.7 - - + -
365D HIS* 4.0 35.2 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with SER 320 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
268D TYR* 3.0 20.9 + - - -
315D TYR 4.8 3.4 + - - -
316D ASN* 2.8 25.1 + - - +
317D PHE* 4.0 5.6 - - - -
319D LEU* 1.3 72.9 - - - +
321D SER* 1.3 59.8 + - - +
322D ILE 3.5 0.2 - - - -
323D LYS* 5.0 3.1 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with SER 321 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
268D TYR* 3.0 31.8 - - - -
290D TRP* 3.2 14.2 - - - -
317D PHE 2.7 21.1 + - - -
318D ALA 2.9 7.1 + - - -
320D SER* 1.3 75.0 - - - +
322D ILE* 1.3 60.0 + - - +
323D LYS 3.2 3.4 + - - -
324D ASP* 3.2 2.7 + - - -
325D VAL* 2.8 52.5 + - - +
358D PHE* 5.2 0.2 - - - -
----------------------------------------------------------
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