Contacts of the helix formed by residues 35 - 40 (chain D) in PDB entry 1JIQ
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 ASP 35 (chain D).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
33D ASN* 2.7 22.1 + - - +
34D LYS* 1.3 72.7 - - - +
36D ARG* 1.3 62.5 + - - -
37D PHE 3.4 2.5 - - - -
38D ASN* 3.2 25.5 + - - +
39D HIS* 3.0 55.9 + - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 36 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
540C ALA* 5.1 0.4 - - + +
26D LEU* 4.1 1.4 - - - +
29D LEU* 3.8 28.5 - - - +
30D PHE* 3.6 47.1 - - + +
33D ASN* 3.1 29.9 + - - +
34D LYS 3.2 1.8 - - - -
35D ASP* 1.3 77.3 - - - +
37D PHE* 1.3 63.7 + - - +
40D PHE* 3.0 55.3 + - + +
56D SER* 2.8 24.8 + - - +
58D ASN 2.8 29.3 + - - -
60D VAL* 3.1 29.5 + - - +
61D THR* 4.8 1.0 - - - +
62D GLU* 5.6 0.2 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 37 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
540C ALA* 3.5 32.4 - - + +
541C SER* 3.7 9.9 - - - +
544C GLY* 3.6 37.9 - - - -
545C LEU 4.2 0.7 - - - -
548C PHE* 5.7 0.4 - - + -
30D PHE* 4.6 0.4 - - - -
34D LYS 5.5 0.4 - - - +
35D ASP 3.4 0.4 - - - -
36D ARG* 1.3 75.8 - - - +
38D ASN* 1.3 64.5 + - + +
40D PHE 3.2 8.8 + - - -
41D SER* 2.7 42.2 + - - -
52D LEU* 4.0 16.8 - - + -
54D ASP* 3.5 38.4 - - + -
56D SER* 4.0 8.5 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ASN 38 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
34D LYS 5.5 0.2 + - - -
35D ASP* 3.2 29.2 + - - +
37D PHE* 1.3 89.3 - - + +
39D HIS* 1.3 74.5 + - - +
40D PHE 3.6 0.2 + - - -
41D SER* 3.8 15.3 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 39 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
33D ASN* 4.3 4.5 + - - -
35D ASP* 3.0 45.9 + - + +
38D ASN* 1.3 91.6 + - - +
40D PHE* 1.3 71.3 + - + +
41D SER 3.6 2.8 + - - +
55D TYR* 3.6 10.2 + - - -
62D GLU* 3.3 28.2 + - + +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 40 (chain D).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
33D ASN* 4.9 3.1 - - - -
36D ARG* 3.0 55.8 + - + +
37D PHE 3.2 2.4 + - - -
39D HIS* 1.3 85.7 - - + +
41D SER* 1.3 58.2 + - - +
55D TYR* 3.0 37.1 + + + -
56D SER* 3.0 37.6 + - - -
60D VAL* 3.9 20.9 - - + -
61D THR 3.7 4.3 - - - -
62D GLU* 3.4 52.3 - - + -
65D MET* 3.7 23.1 - - + -
----------------------------------------------------------
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