Contacts of the helix formed by residues 309 - 313 (chain L) in PDB entry 3KC3
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 GLU 309 (chain L).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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240C TYR* 3.5 23.5 + - - -
311C THR* 3.3 45.2 - - - +
307L LYS* 3.3 5.5 - - - +
308L THR* 1.3 82.1 + - - +
310L PRO* 1.3 80.6 - - - +
311L THR* 3.2 21.3 + - - +
312L GLN* 3.0 35.2 + - + +
313L ARG 3.5 4.2 + - - -
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Residues in contact with PRO 310 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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233C GLU* 3.3 25.1 - - + +
240C TYR* 5.7 1.1 - - - +
240L TYR* 5.0 16.2 - - + +
243L SER* 3.8 21.7 + - - +
308L THR 3.4 9.8 - - - +
309L GLU* 1.3 100.1 - - - +
311L THR* 1.3 63.0 + - + +
312L GLN 3.2 0.7 + - - -
313L ARG* 3.4 44.1 + - - +
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Residues in contact with THR 311 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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240C TYR* 5.6 2.0 - - - +
311C THR* 3.3 23.1 + - + +
309I GLU* 3.5 40.7 - - - +
311I THR* 3.5 16.2 - - + +
312I GLN* 2.9 24.5 + - - +
240L TYR* 4.1 23.6 - - + -
309L GLU* 3.2 18.0 + - - +
310L PRO* 1.3 78.8 - - + +
312L GLN* 1.3 57.8 + - - +
313L ARG 3.5 3.3 - - - +
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Residues in contact with GLN 312 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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311C THR 2.2 41.1 + - - +
312C GLN* 3.2 21.2 + - - +
313C ARG 3.3 11.7 + - - +
314C MET* 5.2 0.8 - - - +
315C THR* 5.6 4.2 - - - +
318C GLU* 4.7 5.2 - - - +
312I GLN* 3.7 16.6 - - - +
304L ASN* 4.0 8.1 + - - -
307L LYS* 3.7 37.9 + - + +
309L GLU* 3.0 26.4 + - + +
311L THR* 1.3 75.6 - - - +
313L ARG* 1.3 64.4 + - - +
314L MET 3.8 0.5 + - - -
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Residues in contact with ARG 313 (chain L).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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232C PRO* 3.7 1.8 - - - +
233C GLU* 2.5 46.4 + - - +
243L SER* 3.1 31.8 + - - -
246L MET* 4.3 2.7 - - + -
247L TRP* 3.4 32.2 - - - +
304L ASN 3.6 7.4 - - - +
305L LEU* 3.0 26.2 - - - +
307L LYS* 2.7 28.2 + - + +
308L THR 3.6 14.8 + - - -
309L GLU 3.5 2.3 + - - +
310L PRO* 3.4 26.6 + - - +
311L THR 4.5 3.3 - - - +
312L GLN* 1.3 81.4 - - - +
314L MET* 1.3 69.9 + - - +
315L THR* 4.7 5.4 - - - +
318L GLU* 4.7 0.3 - - - +
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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