Contacts of the helix formed by residues 286 - 292 (chain B) in PDB entry 1KCX
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 ASP 286 (chain B).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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285B THR* 1.3 81.3 + - - +
287B GLY* 1.3 60.4 + - - +
288B THR* 2.5 41.2 + - - +
289B HIS* 3.3 20.2 - - - -
301B PHE* 4.1 3.8 - - - -
307B LEU* 3.5 16.2 - - - +
308B SER 3.3 13.9 - - - +
310B ASP 4.3 10.3 - - - +
311B PRO* 3.9 19.1 - - - +
313B THR* 5.7 0.4 - - - -
314B PRO* 4.6 8.2 - - + +
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Residues in contact with GLY 287 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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286B ASP* 1.3 69.2 - - - +
288B THR* 1.3 62.8 + - - +
289B HIS* 3.0 4.1 + - - -
290B TYR* 3.0 29.4 + - - -
291B TRP* 3.2 8.5 - - - -
301B PHE* 5.5 0.9 - - - -
307B LEU* 3.3 25.9 - - - +
308B SER 2.7 19.0 + - - -
309B PRO* 4.1 6.3 - - - -
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Residues in contact with THR 288 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
286B ASP* 2.5 28.3 + - - +
287B GLY* 1.3 76.5 - - - +
289B HIS* 1.3 70.4 + - - +
290B TYR 3.2 0.4 - - - -
291B TRP* 3.1 33.9 + - - +
309B PRO* 3.5 23.5 - - + +
311B PRO* 4.5 9.4 - - + -
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Residues in contact with HIS 289 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
285B THR* 3.8 11.2 + - - -
286B ASP* 3.3 26.5 + - - -
287B GLY 3.0 0.8 - - - -
288B THR* 1.3 85.7 + - - +
290B TYR* 1.3 61.2 + - - +
291B TRP 3.0 5.8 - - - -
292B SER* 3.0 25.3 + - - +
297B LYS* 4.0 27.0 + - - -
298B ALA* 3.2 9.8 - - - +
301B PHE* 3.4 43.7 - + + -
433B ILE 5.6 0.2 + - - -
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Residues in contact with TYR 290 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
220B PRO* 3.9 16.1 - - + +
221B GLU* 3.5 31.6 + - - +
223B HIS* 4.5 5.8 - + - -
224B ALA* 3.7 16.4 - - + -
287B GLY* 3.0 30.2 + - - +
289B HIS* 1.3 77.7 - - - +
291B TRP* 1.3 67.5 + + + +
292B SER 3.2 3.6 + - - +
298B ALA* 3.6 24.8 - - - +
301B PHE* 2.7 44.4 + - + +
302B VAL* 3.6 10.5 - - + -
303B THR 3.9 3.6 + - - -
306B PRO* 3.5 17.7 - - + +
307B LEU* 3.1 41.2 + - + +
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Residues in contact with TRP 291 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
221B GLU* 3.6 27.9 - - + +
224B ALA* 3.9 14.6 - - + -
225B LEU* 3.8 33.4 - - + +
287B GLY 3.2 28.3 - - - -
288B THR* 3.1 15.5 + - - +
289B HIS 3.0 1.0 - - - -
290B TYR* 1.3 89.1 - + + +
292B SER* 1.3 62.3 + - - -
293B LYS* 3.7 4.0 + - - +
309B PRO* 3.8 31.2 - - + -
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Residues in contact with SER 292 (chain B).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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288B THR 4.3 0.4 + - - -
289B HIS* 3.0 21.9 + - - +
290B TYR 3.2 2.5 - - - +
291B TRP* 1.3 80.9 - - - +
293B LYS* 1.3 66.3 + - - +
294B ASN* 3.3 26.7 + - - +
295B TRP* 4.4 1.0 + - - -
297B LYS* 3.6 27.5 + - - +
298B ALA* 4.0 7.5 - - - +
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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