Contacts of the helix formed by residues 272 - 278 (chain A) in PDB entry 5DQE
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 ARG 272 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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270A ASP* 2.9 21.7 + - - +
271A VAL* 1.3 74.8 - - - +
273A GLN* 1.3 60.6 + - + +
274A ILE 3.3 0.8 + - - -
275A TYR* 3.9 31.7 + - + +
446A ARG* 4.1 27.7 - - + +
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Residues in contact with GLN 273 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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268A SER 5.5 0.2 + - - -
269A VAL* 3.7 21.6 - - + +
270A ASP* 2.6 47.2 + - + +
272A ARG* 1.3 72.6 - - + +
274A ILE* 1.3 61.8 + - + +
275A TYR 3.6 0.2 - - - -
276A ASP* 4.3 6.2 - - - +
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Residues in contact with ILE 274 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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269A VAL* 5.1 3.1 - - + -
270A ASP 5.0 0.7 - - - +
271A VAL* 2.9 19.6 + - + +
273A GLN* 1.3 89.2 - - + +
275A TYR* 1.3 66.8 + - - +
276A ASP* 3.1 8.5 - - - -
277A LYS* 2.8 38.9 + - + +
278A PHE* 3.9 16.4 + - + -
285A LEU* 4.7 5.4 - - + -
299A LEU* 4.1 34.8 - - + -
425A ALA* 4.5 10.1 - - + -
427A VAL* 5.8 1.3 - - + -
444A LEU* 4.4 24.0 - - + -
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Residues in contact with TYR 275 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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271A VAL* 3.3 44.0 + - + -
272A ARG* 3.9 25.3 + - + +
273A GLN 3.6 1.6 - - - -
274A ILE* 1.3 77.5 - - + +
276A ASP* 1.3 57.0 + - - +
277A LYS 3.4 0.2 + - - -
278A PHE* 3.1 24.6 + - - +
279A PRO 4.7 2.1 - - - +
280A GLU* 4.4 13.8 - - - +
285A LEU* 5.1 3.8 - - + -
286A ARG* 3.2 50.5 + - + +
289A TYR* 6.2 0.2 - - + -
446A ARG* 2.5 36.9 + - - -
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Residues in contact with ASP 276 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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273A GLN 4.3 4.9 - - - +
274A ILE* 3.7 11.8 - - - -
275A TYR* 1.3 73.4 + - - +
277A LYS* 1.3 72.4 + - - +
278A PHE 3.2 7.4 + - - +
351A GLY* 4.6 9.5 + - - -
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Residues in contact with LYS 277 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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274A ILE* 2.8 31.4 + - + +
276A ASP* 1.3 85.7 + - - +
278A PHE* 1.3 62.2 + - + +
348A CYS* 4.2 8.0 - - - +
351A GLY* 4.5 10.0 + - - +
404A GLU* 3.1 35.7 + - - +
405A ASN* 5.7 3.3 - - - +
406A PHE 5.1 0.9 - - - -
407A THR* 3.4 39.7 + - + +
427A VAL* 4.0 24.0 - - + -
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Residues in contact with PHE 278 (chain A).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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274A ILE* 4.5 21.1 - - + -
275A TYR* 3.1 19.5 + - - +
276A ASP* 3.5 8.5 - - - +
277A LYS* 1.3 79.9 - - + +
279A PRO* 1.3 73.1 - - + +
280A GLU* 5.1 0.5 - - - +
284A GLY* 3.9 13.5 - - - -
285A LEU* 4.0 17.0 - - + +
348A CYS* 3.6 22.4 - - - -
351A GLY* 4.4 3.9 - - - -
407A THR* 3.4 26.2 - - + -
408A ILE 3.7 17.0 - - - -
409A LEU* 3.4 39.3 - - + -
425A ALA* 3.9 23.6 - - + -
427A VAL* 6.1 1.3 - - + -
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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