Contacts of the helix formed by residues 282 - 286 (chain C) in PDB entry 1Y3A
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 282 (chain C).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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230C TYR* 3.7 3.2 - - - -
280C LYS 3.5 9.2 - - - +
281C SER* 1.3 86.5 - - - +
283C LEU* 1.3 65.9 + - - +
284C THR* 3.1 21.1 + - + +
285C ILE* 3.1 33.6 + - + +
294C ASN* 3.4 27.8 - - - +
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Residues in contact with LEU 283 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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230C TYR* 3.8 26.4 - - + -
274C PHE* 4.8 4.0 - - + -
278C ILE* 4.1 7.9 - - + +
281C SER 3.7 1.8 + - - -
282C PRO* 1.3 71.0 - - - +
284C THR* 1.3 52.9 + - - +
285C ILE 3.0 0.2 - - - -
286C CYS* 2.7 28.0 + - + +
287C TYR* 2.9 30.6 + - + -
290C TYR* 3.9 25.4 - - + -
294C ASN* 3.3 10.4 + - - +
299C ALA* 3.8 30.5 - - + +
302C TYR* 3.8 27.4 - - + -
303C ILE* 3.9 20.4 - - + -
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Residues in contact with THR 284 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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282C PRO* 3.7 19.7 - - + +
283C LEU* 1.3 77.4 - - - +
285C ILE* 1.3 63.3 + - - +
286C CYS 3.1 0.2 - - - -
287C TYR 3.2 13.7 - - - +
288C PRO* 3.1 33.4 - - - +
290C TYR* 3.6 31.4 - - + +
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Residues in contact with ILE 285 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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144C ARG* 3.6 33.9 - - - +
230C TYR* 4.5 0.9 - - + +
231C ASP* 3.8 20.9 - - + +
232C LEU 5.5 1.6 - - - +
241C ASN* 3.9 7.3 + - - +
281C SER* 3.2 26.7 - - - +
282C PRO* 3.1 29.3 + - + +
283C LEU 2.9 1.2 + - - -
284C THR* 1.3 79.2 + - - +
286C CYS* 1.3 58.9 + - - +
288C PRO* 4.7 2.4 - - - +
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Residues in contact with CYS 286 (chain C).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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230C TYR* 3.0 35.4 - - + +
241C ASN* 3.0 27.8 + - - +
243C MET* 3.4 34.3 - - - -
244C HIS* 3.2 15.6 - - - -
283C LEU* 2.7 9.7 + - + +
285C ILE* 1.3 80.6 - - - +
287C TYR* 1.3 78.4 + - + +
288C PRO* 3.4 7.0 - - - +
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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