Contacts of the helix formed by residues 280 - 286 (chain K) in PDB entry 2X86
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 280 (chain K).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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234K ASN* 4.2 6.7 - - + +
236K GLY 3.4 25.1 - - - +
237K THR 3.4 26.5 - - - +
238K GLY* 3.8 10.3 - - - +
278K ALA* 3.6 18.5 + - + -
279K ASP* 1.3 73.6 + - - +
281K THR* 1.3 64.0 + - - +
282K ASN 3.4 2.2 - - - -
283K LEU* 3.3 22.8 + - + -
284K ARG* 2.9 58.1 + - + +
292K PHE* 4.0 4.0 - - + -
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Residues in contact with THR 281 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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279K ASP* 2.6 28.6 + - - -
280K LEU* 1.3 77.2 - - - +
282K ASN* 1.3 64.7 + - - +
284K ARG* 3.8 4.6 - - - +
285K ALA* 2.9 34.0 + - + +
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Residues in contact with ASN 282 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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128K ILE* 4.7 7.9 - - - +
129K GLU* 2.6 46.0 + - - +
232K ILE 5.0 1.5 + - - +
233K PHE* 3.7 17.8 - - + -
279K ASP* 4.7 2.0 + - - -
280K LEU 3.4 0.2 - - - -
281K THR* 1.3 82.4 - - - +
283K LEU* 1.3 57.1 + - - +
285K ALA* 3.1 8.9 + - - +
286K ALA* 2.8 31.0 + - - +
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Residues in contact with LEU 283 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
129K GLU* 4.7 2.0 + - - +
165K PHE* 5.5 0.2 - - + -
220K VAL* 4.6 7.4 - - + -
224K PHE* 3.7 30.5 - - + -
233K PHE* 3.8 15.5 - - + -
234K ASN 3.8 25.4 - - - +
235K LEU* 5.0 4.9 - - + -
280K LEU* 3.3 32.4 + - + +
282K ASN* 1.3 80.5 - - - +
284K ARG* 1.3 64.5 + - - +
286K ALA* 3.3 10.6 + - - +
288K TYR* 3.5 32.3 + - + +
292K PHE* 3.9 26.9 - - + -
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Residues in contact with ARG 284 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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237K THR 5.1 0.8 + - - -
280K LEU* 2.9 43.2 + - + +
281K THR* 3.8 4.7 - - - +
283K LEU* 1.3 75.4 - - - +
285K ALA* 1.3 59.1 + - - +
287K GLY* 2.8 24.1 + - - -
288K TYR* 3.1 30.9 + - - +
289K ASP* 3.4 16.0 - - + +
290K LYS 2.7 30.3 + - - +
291K PRO* 4.6 3.6 - - - +
292K PHE* 3.4 26.0 - - - -
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Residues in contact with ALA 285 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
281K THR* 2.9 22.6 + - + +
282K ASN* 3.1 9.6 + - - +
284K ARG* 1.3 76.5 - - - +
286K ALA* 1.3 61.3 + - - +
287K GLY* 3.1 1.6 + - - -
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Residues in contact with ALA 286 (chain K).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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223K TRP* 3.6 11.7 - - - -
224K PHE* 4.2 14.6 - - + -
229K VAL* 4.0 24.6 - - + +
233K PHE* 3.8 25.4 - - + -
282K ASN 2.8 11.9 + - - +
283K LEU 3.5 10.5 - - - +
284K ARG 3.1 0.2 - - - -
285K ALA* 1.3 77.0 - - - +
287K GLY* 1.3 56.8 + - - +
288K TYR 3.7 1.1 - - - +
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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