Contacts of the helix formed by residues 36 - 44 (chain B) in PDB entry 1SFX
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 36 (chain B).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
34B MSE 4.1 0.6 + - - -
35B ARG* 1.3 71.9 - - - +
37B SER* 1.3 63.8 + - - +
39B ILE* 3.2 10.2 + - - +
40B ALA* 2.9 21.7 + - - +
47B ALA* 3.4 33.0 - - + +
50B VAL* 4.0 6.1 - - + -
51B ARG* 3.8 24.5 - - + +
54B LEU* 3.8 10.3 - - + -
75B TYR 4.5 2.4 + - - +
77B TYR* 3.7 29.2 - - + -
503B CL 4.2 13.5 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with SER 37 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
35B ARG* 4.2 9.2 - - - +
36B VAL* 1.3 80.1 - - - +
38B GLU* 1.3 66.1 + - - +
40B ALA* 3.6 6.5 + - - +
41B ARG* 3.0 37.8 + - - +
47B ALA* 4.9 7.6 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 38 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
34B MSE 3.6 18.8 - - + +
35B ARG* 2.9 35.4 + - + +
37B SER* 1.3 81.9 + - - +
39B ILE* 1.3 64.9 + - - +
41B ARG* 3.4 29.2 + - - +
42B GLU* 3.1 29.3 + - + +
401B EDO 2.7 32.7 + - - -
----------------------------------------------------------
Back to top of page
Residues in contact with ILE 39 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
24B ILE* 4.1 11.0 - - + +
27B LEU* 3.9 13.2 - - + -
28B LEU* 3.8 27.6 - - + -
34B MSE 3.7 25.8 - - + +
35B ARG 3.1 17.6 + - - +
36B VAL* 3.6 4.3 - - - +
38B GLU* 1.3 77.0 - - - +
40B ALA* 1.3 62.6 + - - +
42B GLU* 3.3 1.9 + - - -
43B LEU* 3.0 46.3 + - + +
50B VAL* 3.7 17.3 - - + -
54B LEU* 3.9 24.5 - - + -
77B TYR* 4.6 1.6 - - + -
----------------------------------------------------------
Back to top of page
Residues in contact with ALA 40 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
36B VAL 2.9 15.8 + - - +
37B SER 3.8 4.0 - - - +
39B ILE* 1.3 78.7 - - - +
41B ARG* 1.3 60.8 + - - +
44B ASP* 3.0 20.4 + - - -
45B LEU* 3.0 29.8 + - - +
47B ALA* 3.7 27.8 - - + +
50B VAL* 3.9 14.1 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ARG 41 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
37B SER* 3.0 34.7 + - - +
38B GLU* 3.7 30.7 + - - +
40B ALA* 1.3 78.1 - - - +
42B GLU* 1.3 82.0 + - - +
44B ASP* 3.3 10.4 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with GLU 42 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
23B ARG* 4.7 2.4 + - - -
27B LEU* 3.9 18.8 - - + -
31B ARG* 3.3 27.5 + - - +
34B MSE 4.4 12.3 - - + -
38B GLU* 3.1 18.1 + - + +
39B ILE 3.8 3.6 - - - +
41B ARG* 1.3 102.3 + - - +
43B LEU* 1.3 62.9 + - - +
44B ASP* 3.6 1.2 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with LEU 43 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
23B ARG* 3.0 62.5 + - + +
24B ILE* 3.6 42.4 - - + +
27B LEU* 4.1 19.3 - - + -
39B ILE* 3.0 29.5 + - + +
40B ALA 4.3 0.4 - - - +
42B GLU* 1.3 79.0 - - - +
44B ASP* 1.3 70.4 + - - +
45B LEU* 3.8 19.5 - - + +
----------------------------------------------------------
Back to top of page
Residues in contact with ASP 44 (chain B).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
40B ALA 3.0 7.0 + - - -
41B ARG* 3.3 7.0 + - - +
42B GLU 3.3 4.7 - - - +
43B LEU* 1.3 81.0 - - - +
45B LEU* 1.3 64.1 + - - +
----------------------------------------------------------
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