Contacts of the helix formed by residues 182 - 187 (chain A) in PDB entry 2VN9
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 SER 182 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
180A TYR 3.7 1.4 + - - -
181A LEU* 1.3 77.7 - - - +
183A PRO* 1.3 75.2 - - - +
184A GLU* 3.3 18.2 - - - -
185A VAL* 3.3 13.2 + - - +
186A LEU* 3.1 21.0 + - - +
195A VAL* 3.3 31.2 + - - +
198A TRP* 3.7 24.2 - - - -
226A ILE* 4.1 1.6 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with PRO 183 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
182A SER* 1.3 89.4 - - - +
184A GLU* 1.3 59.2 + - - +
186A LEU* 3.3 2.8 + - - +
187A ARG* 2.8 39.5 + - - +
198A TRP* 3.6 34.8 - - + -
226A ILE* 3.7 26.4 - - + +
227A LYS* 4.2 17.1 - - + +
255A ILE* 4.1 32.1 - - + +
260A ARG* 4.2 0.2 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 184 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
182A SER* 3.3 14.9 - - - +
183A PRO* 1.3 71.6 - - - +
185A VAL* 1.3 65.6 + - - +
187A ARG* 3.5 7.7 + - - +
188A LYS 3.3 2.3 + - - -
189A ASP* 2.9 48.1 + - + +
190A PRO 4.3 4.9 - - - +
191A TYR* 3.6 21.9 - - + +
192A GLY 5.5 0.2 + - - -
194A PRO* 4.1 1.0 - - - +
195A VAL* 3.3 16.6 + - - +
255A ILE 4.0 2.6 - - - +
257A PRO* 3.6 25.9 - - + +
260A ARG* 2.9 43.2 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with VAL 185 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
173A GLY 4.3 13.5 - - - +
174A PHE* 3.9 28.8 - - + -
175A ALA 4.6 4.0 - - - +
181A LEU* 4.0 21.3 - - + -
182A SER* 3.3 27.2 + - - +
184A GLU* 1.3 77.3 - - - +
186A LEU* 1.3 64.0 + - - +
188A LYS* 2.9 16.5 + - - +
189A ASP 4.9 0.2 - - - -
191A TYR* 3.7 33.0 - - + -
195A VAL* 3.8 12.8 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 186 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
174A PHE* 3.8 24.3 - - + -
181A LEU* 3.8 12.1 - - + +
182A SER 3.1 10.4 + - - +
183A PRO 3.3 5.8 + - - +
185A VAL* 1.3 74.3 - - - +
187A ARG* 1.3 57.6 + - - +
188A LYS* 3.2 9.5 + - - +
223A TYR* 3.4 48.0 - - + +
226A ILE* 3.3 43.7 - - + -
227A LYS* 3.8 28.9 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 187 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
183A PRO* 2.8 25.9 + - - +
184A GLU* 3.7 3.8 - - - +
185A VAL 3.2 0.2 - - - -
186A LEU* 1.3 74.3 - - - +
188A LYS* 1.3 67.4 + - - +
189A ASP* 3.3 30.3 + - - +
227A LYS* 4.2 21.4 + - + +
255A ILE* 5.7 7.1 - - - +
----------------------------------------------------------
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