Contacts of the strand formed by residues 271 - 274 (chain F) 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 LEU 271 (chain F).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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270F GLY* 1.3 71.5 - - - -
272F TRP* 1.3 74.1 + - - +
293F MET* 3.9 20.2 - - + -
299F PRO 3.6 26.0 - - - +
300F LEU* 4.0 4.5 - - + +
301F HIS* 3.0 34.1 + - - +
302F VAL 3.1 7.6 + - - +
512F ILE* 4.4 2.2 - - + -
532F LEU* 4.1 27.6 - - + +
537F SER* 4.1 13.2 - - - +
539F LEU* 4.1 19.3 - - + -
559F VAL* 4.0 11.9 - - + -
563F THR* 4.0 21.4 - - + +
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Residues in contact with TRP 272 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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267F TRP* 4.4 3.4 - + - -
268F SER* 2.9 38.2 + - - -
270F GLY 3.5 11.4 - - - -
271F LEU* 1.3 79.4 - - - +
273F LEU* 1.3 61.1 + - - +
302F VAL* 3.3 36.2 - - + +
304F HIS* 5.1 6.3 - - + -
343F CYS* 3.7 31.6 - - + -
412F CYS* 3.7 20.0 - - + -
462F VAL* 4.6 10.5 - - + -
463F LEU 5.1 1.3 - - - -
464F PHE* 3.7 40.7 - + + -
536F HIS* 4.8 2.6 - + + -
537F SER 3.0 25.3 + - - +
538F ARG* 3.3 22.1 - - + -
539F LEU* 2.8 27.4 + - - +
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Residues in contact with LEU 273 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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272F TRP* 1.3 73.2 - - - +
274F THR* 1.3 88.8 + - - +
275F THR* 5.1 0.2 - - - -
289F PHE* 4.9 17.3 - - + -
293F MET* 5.5 5.6 - - + -
300F LEU* 3.4 28.7 - - + -
302F VAL 2.9 8.7 + - - +
303F PHE* 3.3 29.1 - - + -
304F HIS* 2.9 27.3 + - - +
538F ARG* 4.8 0.4 - - - -
539F LEU* 3.3 36.1 - - + +
546F ARG* 4.2 15.7 - - + +
547F VAL* 4.9 11.0 - - + -
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Residues in contact with THR 274 (chain F).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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273F LEU* 1.3 94.4 + - - +
275F THR* 1.3 75.3 + - - +
276F SER* 3.0 15.6 + - - +
289F PHE* 5.6 1.4 - - - -
304F HIS* 3.4 25.4 - - + +
306F ASP* 4.3 0.2 - - + -
538F ARG* 3.4 20.6 + - - -
539F LEU 2.9 9.3 + - - +
540F HIS* 2.8 55.6 + - + +
545F TYR* 5.3 2.1 - - - +
546F ARG* 5.1 3.5 + - - +
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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
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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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