Contacts of the helix formed by residues 280 - 286 (chain T) 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 T).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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234T ASN* 4.2 6.5 - - + +
236T GLY 3.4 24.7 - - - +
237T THR 3.4 25.8 - - - +
238T GLY* 3.8 11.0 - - - +
278T ALA* 3.6 18.1 + - + -
279T ASP* 1.3 74.1 + - - +
281T THR* 1.3 64.0 + - - +
282T ASN 3.4 2.5 - - - -
283T LEU* 3.3 23.2 + - + -
284T ARG* 2.9 57.7 + - + +
292T PHE* 4.0 4.5 - - + -
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Residues in contact with THR 281 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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279T ASP* 2.6 27.7 + - - -
280T LEU* 1.3 77.0 - - - +
282T ASN* 1.3 66.3 + - - +
284T ARG* 3.3 4.7 + - - +
285T ALA* 2.9 33.3 + - + +
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Residues in contact with ASN 282 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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128T ILE* 4.7 8.7 - - - +
129T GLU* 2.6 46.5 + - - +
232T ILE 5.0 2.1 + - - +
233T PHE* 3.7 18.0 - - + -
279T ASP* 4.7 1.6 + - - -
280T LEU 3.4 0.2 - - - -
281T THR* 1.3 82.5 - - - +
283T LEU* 1.3 58.5 + - - +
285T ALA* 3.1 7.5 + - - +
286T ALA* 2.8 31.0 + - - +
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Residues in contact with LEU 283 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
129T GLU* 4.6 2.3 + - - +
165T PHE* 5.5 0.7 - - + -
220T VAL* 4.6 7.9 - - + -
224T PHE* 3.7 30.5 - - + -
233T PHE* 3.8 15.3 - - + -
234T ASN 3.7 25.6 - - - +
235T LEU* 5.0 4.3 - - + -
280T LEU* 3.3 31.9 + - + +
282T ASN* 1.3 80.7 - - - +
284T ARG* 1.3 65.6 + - - +
286T ALA* 3.3 11.0 + - - +
288T TYR* 3.5 31.6 + - + +
292T PHE* 3.9 27.4 - - + -
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Residues in contact with ARG 284 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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237T THR 5.1 0.8 + - - -
280T LEU* 2.9 43.2 + - + +
281T THR* 3.8 4.7 - - - +
283T LEU* 1.3 74.7 - - - +
285T ALA* 1.3 58.1 + - - +
287T GLY* 2.8 24.3 + - - -
288T TYR* 3.1 30.9 + - - -
289T ASP* 3.4 14.4 - - + +
290T LYS 2.7 30.5 + - - +
291T PRO* 4.6 3.2 - - - +
292T PHE* 3.4 25.1 - - - +
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Residues in contact with ALA 285 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
281T THR* 2.9 21.9 + - + +
282T ASN* 3.5 9.9 - - - +
284T ARG* 1.3 76.8 - - - +
286T ALA* 1.3 61.3 + - - +
287T GLY* 3.1 1.4 + - - -
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Residues in contact with ALA 286 (chain T).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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223T TRP* 3.6 12.3 - - + -
224T PHE* 4.2 15.0 - - + -
229T VAL* 4.0 23.7 - - + +
233T PHE* 3.8 24.9 - - + -
282T ASN 2.8 12.7 + - - +
283T LEU 3.5 10.5 - - - +
284T ARG 3.1 0.4 - - - -
285T ALA* 1.3 76.4 - - - +
287T GLY* 1.3 56.9 + - - +
288T 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