Contacts of the strand formed by residues 302 - 305 (chain E) in PDB entry 1XSK
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 302 (chain E).
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
267E TRP* 3.7 37.5 - - + +
271E LEU 3.1 3.6 + - - -
272E TRP* 3.4 55.1 - - + +
273E LEU 3.0 25.5 + - - -
300E LEU* 3.4 8.6 - - - +
301E HIS* 1.3 85.9 - - + +
303E PHE* 1.3 68.9 + - - +
340E LEU* 5.0 0.2 - - - -
341E LYS* 3.3 17.3 - - + +
343E CYS* 4.4 6.3 - - + +
412E CYS* 4.7 0.9 - - - -
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 303 (chain E).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
273E LEU* 3.5 40.8 - - + -
274E THR 4.4 2.2 - - - -
275E THR* 3.2 36.8 - - + -
286E VAL* 3.8 29.4 - - + -
289E PHE* 4.9 8.1 - + + -
290E ILE* 4.3 20.2 - - + -
300E LEU* 5.0 2.0 - - + -
302E VAL* 1.3 75.7 - - - +
304E HIS* 1.3 65.8 + - - +
305E PHE* 3.9 23.8 - + - -
335E LEU* 4.3 2.9 - - + -
340E LEU* 4.5 14.7 - - + +
341E LYS 2.8 10.3 + - - +
342E ILE* 3.5 18.0 - - + +
343E CYS* 2.9 24.9 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with HIS 304 (chain E).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
272E TRP* 5.0 9.8 - + + -
273E LEU 2.8 12.0 + - - +
274E THR* 3.2 30.4 - - + +
275E THR* 3.4 28.4 + - - +
303E PHE* 1.3 79.4 - - - +
305E PHE* 1.3 78.1 + - - +
306E ASP* 3.1 26.2 + - - -
343E CYS* 3.2 28.0 + - + -
344E VAL 3.7 0.7 - - - -
345E TRP* 3.5 9.9 - - - -
414E LYS* 3.3 36.3 - - + +
538E ARG* 3.6 12.1 + - - +
----------------------------------------------------------
Back to top of page
Residues in contact with PHE 305 (chain E).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
275E THR* 4.3 6.3 - - + -
281E TYR* 5.4 1.3 - + - -
286E VAL* 3.7 24.0 - - + -
303E PHE* 3.9 22.7 - + - -
304E HIS* 1.3 74.1 + - - +
306E ASP* 1.3 61.3 + - - +
309E TRP* 3.7 11.3 - - + -
320E TRP* 4.5 8.1 - + - -
325E PHE* 3.9 19.5 - + - -
331E MET* 3.4 37.0 - - + -
332E ILE* 4.8 4.5 - - + -
335E LEU* 4.2 9.2 - - + -
342E ILE* 3.9 27.8 - - + -
343E CYS 2.9 8.7 + - - -
344E VAL* 3.8 28.0 - - + -
345E TRP 2.9 28.2 + - - -
----------------------------------------------------------
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