Contacts of the helix formed by residues 216 - 220 (chain B) in PDB entry 4BEJ
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 LYS 216 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
35B SER* 3.6 26.7 + - - -
36B SER 4.6 4.0 - - - -
37B GLY* 5.3 2.9 - - - +
186B ALA* 4.0 16.8 - - + +
187B ALA* 3.5 12.3 - - - +
188B ASN* 4.2 16.5 - - + +
215B THR* 1.3 88.1 - - - +
217B LEU* 1.3 59.2 + - - +
218B ASP* 3.1 11.2 - - - -
219B LEU* 2.8 48.4 + - + +
244B VAL 3.3 4.9 + - - -
245B VAL* 4.3 6.3 - - - +
246B ASN 5.2 1.4 - - - +
248B SER* 5.6 9.5 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 217 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
187B ALA* 4.4 4.3 - - - -
214B ILE* 4.1 12.3 - - + +
215B THR 3.3 1.1 - - - -
216B LYS* 1.3 76.2 - - - +
218B ASP* 1.3 61.5 + - - +
219B LEU 3.0 0.4 - - - -
220B MET* 3.1 40.5 - - + +
230B LEU* 3.7 28.9 - - + -
243B GLY* 3.3 11.9 - - - +
244B VAL* 3.2 38.4 - - - +
245B VAL* 3.3 11.4 - - + +
268B PHE* 4.4 9.0 - - + -
269B LEU* 4.1 22.9 - - + -
273B TYR* 3.7 13.5 + - + -
280B ASN* 4.7 3.4 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with ASP 218 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
216B LYS* 3.6 13.7 - - - +
217B LEU* 1.3 75.2 - - - +
219B LEU* 1.3 75.9 + - - +
220B MET 3.2 4.7 + - - +
245B VAL* 3.7 12.1 - - + +
268B PHE* 3.4 34.7 - - + -
272B LYS* 4.3 10.8 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 219 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
187B ALA* 4.2 11.9 - - - +
188B ASN* 3.7 36.9 - - - +
216B LYS* 2.8 36.7 + - + +
218B ASP* 1.3 99.5 - - - +
220B MET* 1.3 57.2 + - - -
221B ASP* 3.0 14.5 + - - +
224B THR* 6.1 0.2 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with MET 220 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
187B ALA* 4.8 14.1 - - + +
214B ILE* 5.8 2.5 - - - -
217B LEU* 3.1 40.9 + - + +
218B ASP 3.2 3.0 - - - +
219B LEU* 1.3 75.2 - - - +
221B ASP* 1.3 71.3 + - - +
224B THR 5.4 1.6 - - - +
226B ALA 4.9 1.8 - - - +
227B MET* 3.7 46.2 - - + +
230B LEU* 4.7 9.6 - - + -
272B LYS* 4.6 6.1 + - - -
273B TYR* 3.4 47.7 + - + +
276B LEU* 5.6 2.0 - - + -
----------------------------------------------------------
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