Contacts of the strand formed by residues 261 - 265 (chain A) in PDB entry 1KEK
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 PHE 261 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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259A LYS* 3.3 17.0 - - - +
260A LEU* 1.3 84.3 - - + +
262A ASP* 1.3 63.5 + - - +
274A VAL* 5.7 0.2 - - + -
300A ILE* 3.9 24.9 - - + -
301A LYS 3.4 5.6 - - - -
302A VAL* 3.7 32.1 - - + -
304A LEU 3.9 14.8 - - - -
308A PHE* 3.8 39.9 - + - -
309A VAL* 3.5 25.6 - - + -
312A ALA* 3.5 22.5 + - + +
313A PHE* 3.3 27.8 - + + -
316A ALA* 3.9 11.0 - - + +
340A LEU* 5.7 0.2 - - + -
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Residues in contact with ASP 262 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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257A SER 5.1 2.6 - - - +
258A TYR* 3.5 6.2 - - - -
259A LYS* 2.8 45.9 + - - +
261A PHE* 1.3 73.5 - - - +
263A TYR* 1.3 60.7 + - - +
264A VAL* 6.1 1.3 - - + -
299A LEU 3.8 0.2 - - - +
300A ILE* 3.4 4.2 - - - +
301A LYS* 2.8 40.3 + - + +
303A ARG* 2.7 40.6 + - - +
316A ALA* 4.4 2.5 - - - -
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Residues in contact with TYR 263 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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262A ASP* 1.3 75.1 - - - +
264A VAL* 1.3 74.4 + - - +
265A GLY 3.5 20.6 - - - -
266A ALA 2.6 24.3 + - - -
267A PRO* 4.7 4.5 - - + -
269A ALA* 3.1 17.7 - - - +
272A VAL* 4.3 5.4 - - + -
298A GLY* 3.1 9.9 - - - -
299A LEU 3.2 37.5 - - - -
300A ILE* 4.0 3.8 - - + +
316A ALA* 3.2 35.5 - - + +
318A PRO* 3.5 24.7 - - + -
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Residues in contact with VAL 264 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
262A ASP* 6.1 1.8 - - + -
263A TYR* 1.3 85.1 - - - +
265A GLY* 1.3 59.9 + - - +
284A GLU* 3.4 46.7 - - + +
287A ILE* 4.0 11.2 - - + +
288A ASN* 6.1 0.2 - - - +
298A GLY* 3.2 2.8 - - - -
299A LEU* 2.9 55.2 + - + +
301A LYS* 4.2 12.1 - - - +
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Residues in contact with GLY 265 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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263A TYR* 3.5 8.3 - - - -
264A VAL* 1.3 77.0 - - - +
266A ALA* 1.3 67.0 + - - -
267A PRO* 3.3 8.3 - - - +
287A ILE* 3.5 24.0 - - - +
288A ASN* 6.0 1.0 - - - +
291A ALA* 5.5 1.1 - - - -
297A ILE 3.5 3.6 - - - -
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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