Contacts of the helix formed by residues 443 - 448 (chain A) in PDB entry 7EHI
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 ARG 443 (chain A).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
437A ASP* 3.4 8.7 + - + +
442A PRO* 1.3 75.7 - - - +
444A LEU* 1.3 67.7 + - - +
445A MET 4.3 0.7 - - - +
446A THR* 3.0 3.9 + - - +
447A LEU* 2.9 21.2 + - - +
472A TYR* 3.4 26.6 + - + -
473A TYR* 2.8 59.4 + - - -
475A THR* 3.9 13.3 + - - +
479A MET* 3.4 47.4 + - - +
480A THR* 3.7 14.5 + - - -
481A GLY* 2.8 26.3 + - - +
482A GLU 4.4 0.2 + - - -
487A ASP* 3.4 26.7 + - + -
489A LYS 4.7 0.8 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 444 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
401A LEU* 4.3 10.3 - - + -
436A VAL* 4.2 12.8 - - + -
437A ASP* 2.7 20.1 + - - +
442A PRO 3.8 0.6 + - - -
443A ARG* 1.3 71.9 - - - +
445A MET* 1.3 65.1 + - + +
447A LEU* 3.1 10.1 + - + +
448A ALA* 2.9 22.1 + - + +
455A ALA* 3.9 21.5 - - + +
458A ILE* 3.8 38.4 - - + -
459A LEU* 3.6 42.6 - - + -
475A THR* 4.3 12.1 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with MET 445 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
443A ARG* 3.3 2.0 - - - +
444A LEU* 1.3 80.8 - - + +
446A THR* 1.3 59.4 + - - +
448A ALA* 3.6 2.2 + - - -
449A HIS 3.4 2.1 + - - -
450A GLU* 2.9 61.6 + - + +
451A ASP 4.3 1.1 - - - +
452A LYS* 4.3 16.6 - - + -
455A ALA* 3.8 26.0 - - + -
478A GLY* 3.8 19.3 - - - +
479A MET 3.5 19.4 + - - +
480A THR* 4.1 10.5 - - + -
499A ASP* 5.4 2.2 - - - +
502A LEU* 3.8 29.6 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with THR 446 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
442A PRO* 4.8 3.6 - - + -
443A ARG* 3.0 5.7 + - - +
445A MET* 1.3 75.1 - - - +
447A LEU* 1.3 67.3 + - + +
448A ALA 3.1 1.3 - - - -
449A HIS* 3.0 22.5 + - - +
450A GLU* 5.0 4.2 + - - +
480A THR* 3.4 11.3 - - - +
481A GLY 2.8 45.5 + - - +
482A GLU* 3.6 32.1 - - + +
610A SO4 5.2 0.3 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 447 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
401A LEU* 4.3 26.9 - - + -
405A LEU* 3.5 32.9 - - + +
436A VAL 5.2 2.9 - - - +
437A ASP* 5.6 0.2 - - + -
441A THR* 5.7 1.3 - - - +
442A PRO* 3.9 43.3 - - + +
443A ARG 2.9 19.5 + - - +
444A LEU* 3.7 12.1 - - + +
446A THR* 1.3 73.9 - - + +
448A ALA* 1.3 56.6 + - - +
449A HIS* 3.2 18.7 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 448 (chain A).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
405A LEU* 4.0 11.6 - - + +
444A LEU* 2.9 19.1 + - + +
445A MET* 3.9 7.6 - - - +
446A THR 3.1 0.2 - - - -
447A LEU* 1.3 75.5 - - - +
449A HIS* 1.3 70.7 + - - +
450A GLU 3.1 0.2 - - - -
451A ASP* 3.0 36.6 + - - +
454A LEU* 4.2 16.6 - - + +
455A ALA* 4.4 12.8 - - + +
----------------------------------------------------------
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