Contacts of the helix formed by residues 275 - 281 (chain E) in PDB entry 3KQG
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 VAL 275 (chain E).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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273E ASN* 3.1 5.8 + - - +
274E LYS* 1.3 82.8 - - + +
276E GLN* 1.3 66.4 + - - +
277E SER 3.2 1.6 - - - -
278E ALA* 3.4 17.9 + - + +
279E ARG* 4.5 1.9 + - - +
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Residues in contact with GLN 276 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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233E VAL 4.6 8.3 - - - +
234E THR* 3.6 21.9 + - - -
235E SER* 3.7 15.6 - - - +
236E GLU* 4.7 2.0 - - + +
273E ASN* 3.0 42.2 + - - +
275E VAL* 1.3 77.0 - - - +
277E SER* 1.3 66.1 + - - +
278E ALA 3.1 4.9 + - - -
279E ARG* 3.3 25.9 - - + +
280E PHE* 3.9 22.6 - - + -
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Residues in contact with SER 277 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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233E VAL 5.2 1.9 + - - -
266E TRP* 5.0 3.5 + - - -
272E PHE* 3.7 21.1 - - - -
273E ASN 2.8 28.5 + - - -
274E LYS 4.3 1.8 - - - -
276E GLN* 1.3 84.4 + - - +
278E ALA* 1.3 60.1 + - - +
279E ARG 3.3 0.9 - - - -
280E PHE* 3.5 15.1 + - - -
281E TRP* 3.0 22.7 + - - -
306E TRP* 3.5 29.5 - - - -
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Residues in contact with ALA 278 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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274E LYS 3.8 11.8 + - - +
275E VAL* 3.4 15.4 + - + +
276E GLN 3.1 1.2 - - - -
277E SER* 1.3 79.3 - - - +
279E ARG* 1.3 58.3 + - - +
280E PHE 3.2 3.0 + - - -
281E TRP* 3.8 23.5 + - + +
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Residues in contact with ARG 279 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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236E GLU* 2.8 31.1 + - - -
275E VAL 4.5 1.5 + - - +
276E GLN* 3.3 19.5 + - - +
278E ALA* 1.3 77.1 - - - +
280E PHE* 1.3 72.8 + - + +
281E TRP 3.5 2.5 - - - -
303E LEU* 3.6 21.6 - - - +
304E GLN* 3.3 47.6 + - - +
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Residues in contact with PHE 280 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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233E VAL* 4.6 6.5 - - + -
235E SER 4.2 6.3 - - - -
236E GLU* 4.0 40.8 - - + -
239E GLN* 3.7 28.5 + - + +
276E GLN* 3.9 35.0 - - + -
277E SER* 3.5 22.4 + - - +
278E ALA 3.2 1.0 - - - -
279E ARG* 1.3 95.0 - - + +
281E TRP* 1.3 59.7 + - - +
303E LEU* 3.2 22.4 - - + +
305E ALA 2.9 20.3 + - - -
306E TRP* 2.9 39.7 + + + -
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Residues in contact with TRP 281 (chain E).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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255E LEU* 4.2 16.2 - - + -
264E TRP* 3.8 37.5 - + - -
272E PHE* 4.9 6.2 - + - -
277E SER 3.0 29.4 + - - -
278E ALA* 3.8 18.3 + - - +
279E ARG* 3.5 2.0 - - - +
280E PHE* 1.3 79.5 - - - +
282E ILE* 1.3 66.2 + - - +
283E PRO* 3.3 2.3 - - - +
285E GLU* 3.4 31.2 - - + +
286E PRO* 3.5 32.5 - - + +
296E GLY* 5.2 0.2 - - - -
304E GLN* 3.2 20.6 - - - +
306E TRP* 3.5 43.7 - + + -
307E ASN 4.1 2.2 - - - -
308E ASP* 3.9 22.4 - - + -
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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