Contacts of the strand formed by residues 19 - 26 (chain A) in PDB entry 1VCA
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 VAL 19 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
11A TYR* 3.7 52.7 - - + +
13A ALA* 4.3 8.3 - - + -
14A GLN 5.1 0.7 - - - +
17A ASP* 4.0 11.2 - - + -
18A SER* 1.3 78.6 + - - +
20A SER* 1.3 66.6 + - - +
21A LEU* 4.3 0.2 - - + -
56A LEU 4.0 0.3 - - - +
57A THR* 3.5 2.9 - - - +
58A MET* 2.9 53.1 + - + +
61A VAL* 3.9 24.0 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with SER 20 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
6A THR 4.6 3.6 - - - +
11A TYR* 4.2 10.3 + - - -
18A SER* 5.6 0.2 + - - -
19A VAL* 1.3 77.4 - - - +
21A LEU* 1.3 67.4 + - - +
22A THR* 4.4 6.3 + - - +
55A THR* 4.0 17.1 - - - +
56A LEU 3.4 4.5 - - - -
57A THR* 3.1 21.8 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 21 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
6A THR 3.8 3.8 - - - -
7A PRO* 4.4 4.7 - - + -
11A TYR* 4.2 21.8 - - + -
19A VAL* 4.3 0.4 - - + -
20A SER* 1.3 78.4 - - - +
22A THR* 1.3 67.1 + - - +
35A TRP* 4.2 13.0 - - + -
54A SER 3.8 0.2 - - - +
55A THR* 3.4 1.4 - - - +
56A LEU* 2.9 50.9 + - + +
58A MET* 3.8 21.8 - - + -
69A TYR* 4.2 21.8 - - + -
84A ILE* 3.8 21.3 - - + -
86A VAL* 4.0 25.8 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 22 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5A THR* 3.1 9.9 - - - +
6A THR* 2.8 57.6 + - - +
20A SER* 4.9 6.3 - - - +
21A LEU* 1.3 83.6 - - - +
23A CYS* 1.3 61.2 + - - +
24A SER* 4.9 3.8 + - - -
35A TRP* 4.4 3.1 - - - -
53A THR* 4.5 9.4 - - - -
54A SER 3.4 6.7 - - - -
55A THR* 3.8 20.9 - - + +
84A ILE* 4.4 1.2 - - - +
----------------------------------------------------------
Back to top of page
Residues in contact with CYS 23 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
3A ILE* 3.8 22.4 - - - -
4A GLU 3.4 4.3 - - - -
5A THR* 4.2 4.5 - - + -
22A THR* 1.3 74.1 - - - +
24A SER* 1.3 66.8 + - - +
33A PHE* 3.9 12.3 - - + -
35A TRP* 3.6 15.0 - - + -
53A THR* 3.3 1.6 + - - -
54A SER* 2.9 32.8 + - - +
71A CYS* 2.0 50.0 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with SER 24 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
3A ILE* 3.4 6.4 - - - +
4A GLU* 2.6 52.5 + - - -
22A THR* 4.9 4.2 + - - -
23A CYS* 1.3 71.2 + - - +
25A THR* 1.3 68.0 + - - +
33A PHE* 4.2 1.8 - - - -
52A THR 3.4 9.0 - - - -
53A THR* 3.0 24.9 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 25 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
1A PHE* 3.7 28.5 - - + -
2A LYS 3.0 9.6 - - - +
3A ILE* 4.7 1.6 - - - -
4A GLU* 5.0 1.3 - - - +
24A SER* 1.3 82.7 - - - +
26A THR* 1.3 69.7 - - - +
28A CYS* 4.2 5.8 + - - +
31A PRO* 3.3 26.5 - - + +
33A PHE* 3.7 8.3 - - + -
52A THR* 3.3 25.3 + - - +
73A ALA* 3.7 21.3 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 26 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
1A PHE* 3.2 5.1 - - - -
2A LYS* 2.9 48.6 + - - +
4A GLU* 4.8 12.8 - - - +
25A THR* 1.3 77.3 - - - +
27A GLY* 1.3 62.6 + - - +
28A CYS 3.3 3.0 + - - +
52A THR* 6.3 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