Contacts of the helix formed by residues 276 - 280 (chain B) in PDB entry 2VKM
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 PRO 276 (chain B).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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255B GLU* 3.6 19.5 - - - +
270B TRP* 3.2 46.0 - - + +
274B THR 2.9 8.5 - - - +
275B THR* 1.4 80.7 - - + +
277B TRP* 1.3 64.2 + - - +
278B ASN* 3.1 13.2 - - - +
279B ILE* 3.0 38.9 + - + +
280B PHE* 3.6 5.8 - - + -
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Residues in contact with TRP 277 (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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158B GLY* 4.8 9.0 - - - -
275B THR* 2.9 41.4 + - + +
276B PRO* 1.3 71.3 - - - +
278B ASN* 1.3 62.0 + - - +
280B PHE* 3.1 13.7 + - - +
302B PRO* 3.5 35.8 - - + +
303B GLN* 3.4 55.5 - - + +
306B LEU* 4.0 17.7 - - + -
320B TYR* 3.5 43.7 - + - -
363B ASP* 4.0 13.2 - - + +
366B ARG* 3.0 18.2 + - - +
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Residues in contact with ASN 278 (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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276B PRO* 3.1 15.0 + - - +
277B TRP* 1.3 79.7 - - - +
279B ILE* 1.3 69.0 + - - +
280B PHE 3.3 5.9 + - - +
363B ASP* 5.8 1.1 - - - -
365B PHE* 6.1 2.7 - - + -
366B ARG* 3.9 10.6 + - - +
205C ARG* 4.5 10.0 - - - +
209C ASN 4.9 0.7 - - - +
210C GLY 3.5 18.3 - - - +
211C GLN* 3.4 25.3 + - - +
212C ASP* 2.9 37.4 + - - +
214C LYS* 6.3 1.0 - - - +
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Residues in contact with ILE 279 (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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209B ASN* 5.6 0.3 - - - +
251B ALA* 3.0 25.6 - - - +
252B SER* 3.5 22.3 - - - +
254B THR* 3.7 17.3 - - - +
255B GLU* 3.9 31.2 - - + +
257B PHE* 4.3 2.0 - - + -
276B PRO* 3.0 35.8 + - + +
278B ASN* 1.3 87.7 - - - +
280B PHE* 1.3 83.1 + - + +
211C GLN* 3.6 20.0 - - + +
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Residues in contact with PHE 280 (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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209B ASN* 4.9 0.9 - - - -
248B ILE* 4.7 3.8 - - + -
252B SER* 4.1 13.9 - - - -
257B PHE* 3.7 33.0 - + - -
261B PHE* 4.5 11.2 - + - -
262B TRP* 4.4 11.0 - + - -
270B TRP* 3.9 25.4 - + - -
275B THR* 5.8 0.7 - - + -
276B PRO* 3.6 13.2 - - + -
277B TRP* 3.1 6.5 + - - +
278B ASN 3.8 0.9 - - - +
279B ILE* 1.3 98.1 - - + +
281B PRO* 1.3 66.2 - - + +
302B PRO* 3.6 15.9 - - + -
305B TYR* 3.4 23.3 - + - +
306B LEU* 3.9 19.5 - - + -
366B ARG* 2.8 30.1 + - - -
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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