Contacts of the helix formed by residues 277 - 282 (chain M) in PDB entry 6PST
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 TYR 277 (chain M).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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253M LEU 3.0 10.5 - - - +
254M LEU* 3.0 45.7 - - + +
255M ARG 4.0 0.9 - - - -
256M PRO* 5.5 3.8 - - + -
257M VAL* 6.2 1.1 - - - -
275M ILE* 3.6 9.6 - - - +
276M HIS* 1.3 96.4 - - + +
278M ILE* 1.3 63.8 + - - +
280M ASP* 3.1 14.0 + - - +
281M LEU 3.1 17.2 + - - -
321M TRP* 3.2 30.1 - + - +
322M PRO* 3.3 36.3 - - + +
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Residues in contact with ILE 278 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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252M ILE* 3.0 30.5 - - + +
253M LEU* 2.5 15.4 + - + +
255M ARG* 3.0 24.9 - - + +
256M PRO 3.8 3.6 - - - +
257M VAL* 5.8 0.4 - - + -
260M LEU* 3.3 40.2 - - + -
277M TYR* 1.3 73.0 - - - +
279M GLY* 1.3 54.0 + - - +
281M LEU* 3.7 9.6 - - + -
282M VAL* 2.9 36.1 + - + +
307M LEU* 3.9 14.8 - - + -
310M ARG* 5.6 1.3 - - - +
312M LEU* 3.3 38.6 - - + -
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Residues in contact with GLY 279 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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253M LEU* 3.1 44.5 + - - +
277M TYR 3.1 0.2 - - - -
278M ILE* 1.3 75.6 - - - +
280M ASP* 1.3 59.1 + - - +
282M VAL* 2.9 17.1 - - - +
283M GLN* 3.1 19.8 + - - +
318M LEU* 3.4 4.7 - - - +
321M TRP* 4.3 6.7 - - - -
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Residues in contact with ASP 280 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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275M ILE* 4.5 11.9 - - + +
276M HIS* 5.6 1.1 + - - +
277M TYR* 3.1 23.7 + - - +
279M GLY* 1.3 75.7 - - - +
281M LEU* 1.3 62.4 + - - +
283M GLN* 2.9 38.1 + - - +
284M ARG* 4.1 10.4 + - - +
321M TRP* 3.1 36.1 + - - +
322M PRO* 4.7 5.5 - - - +
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Residues in contact with LEU 281 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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257M VAL* 5.4 0.9 - - + -
260M LEU* 4.8 17.3 - - + -
262M LEU* 6.1 1.8 - - + -
270M LEU* 4.7 16.6 - - + -
275M ILE* 3.5 34.5 - - + +
277M TYR 3.1 9.9 + - - +
278M ILE* 3.4 11.9 + - + +
280M ASP* 1.3 74.5 - - - +
282M VAL* 1.3 65.7 + - - +
283M GLN 3.1 1.8 - - - -
284M ARG* 3.1 16.0 + - + +
289M LEU* 3.9 35.0 - - + -
303M ILE* 4.9 17.5 - - + -
307M LEU* 5.2 10.5 - - + -
314M LEU* 4.4 3.0 - - + +
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Residues in contact with VAL 282 (chain M).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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253M LEU* 4.3 7.6 - - + -
278M ILE* 2.9 28.3 + - + +
279M GLY* 2.9 29.4 - - - +
281M LEU* 1.3 75.9 - - - +
283M GLN* 1.3 58.4 + - - +
284M ARG 3.2 3.6 - - - +
307M LEU* 4.5 5.8 - - + -
312M LEU* 4.0 16.6 - - + -
313M SER 2.9 34.8 - - - +
314M LEU* 3.2 4.5 - - - +
315M GLY 2.9 27.2 + - - -
316M MET* 3.6 20.7 + - + +
318M LEU* 3.9 7.4 - - + -
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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