Contacts of the helix formed by residues 280 - 290 (chain A) in PDB entry 2I66
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 280 (chain A).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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248A GLU* 4.2 35.5 - - - +
278A ILE* 4.1 3.0 - - - +
279A TYR* 1.3 90.0 - - - +
281A PRO* 1.3 62.9 - - - +
282A ASP* 3.2 21.0 + - - +
283A LYS* 3.0 26.6 + - + +
284A PHE* 2.9 24.8 + - - +
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Residues in contact with PRO 281 (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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131A LEU* 4.0 19.7 - - + -
243A ILE* 3.8 20.9 - - + -
244A HIS 3.8 21.5 - - - +
278A ILE* 3.9 14.8 - - + +
279A TYR 3.7 7.6 - - - +
280A ARG* 1.3 86.8 - - - +
282A ASP* 1.3 60.4 + - - +
284A PHE* 3.5 3.9 - - + +
285A LEU* 3.0 34.0 + - - +
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Residues in contact with ASP 282 (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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280A ARG* 3.5 26.5 + - - +
281A PRO* 1.3 78.6 - - - +
283A LYS* 1.3 66.6 + - - +
285A LEU* 3.5 7.3 + - - +
286A GLN* 3.2 20.4 + - - +
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Residues in contact with LYS 283 (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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280A ARG* 3.0 30.5 + - + +
282A ASP* 1.3 82.3 - - - +
284A PHE* 1.3 68.8 + - - +
286A GLN* 3.1 9.0 + - + +
287A CYS* 2.8 42.0 + - - -
295A SER* 2.4 44.4 + - - +
296A CYS* 3.7 9.1 + - - +
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Residues in contact with PHE 284 (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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131A LEU* 4.7 8.1 - - + -
135A PHE* 3.8 31.2 - + + -
207A MET* 4.1 18.4 - - + -
241A TRP* 3.9 19.1 - + - -
278A ILE* 3.7 37.0 - - + -
280A ARG 2.9 12.3 + - - +
281A PRO 3.5 10.3 - - - +
283A LYS* 1.3 78.7 - - - +
285A LEU* 1.3 69.5 - - + +
287A CYS* 3.1 7.9 + - + +
288A VAL* 3.0 45.0 + - + +
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Residues in contact with LEU 285 (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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131A LEU* 3.4 35.7 - - + -
134A GLN* 3.7 27.1 - - + +
135A PHE* 3.8 33.7 - - + +
138A VAL* 5.0 6.5 - - + +
281A PRO 3.0 14.6 + - - +
282A ASP* 4.0 5.8 - - - +
284A PHE* 1.3 82.0 - - + +
286A GLN* 1.3 62.9 + - - +
288A VAL* 3.2 6.3 + - + +
289A LYS* 3.1 42.3 + - - +
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Residues in contact with GLN 286 (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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282A ASP 3.2 13.7 + - - +
283A LYS* 3.1 13.8 + - + +
285A LEU* 1.3 77.5 - - - +
287A CYS* 1.3 60.1 + - - +
289A LYS* 3.2 15.6 + - - +
290A ASN* 2.9 63.2 + - + +
294A SER* 5.6 5.8 - - - +
296A CYS* 5.9 0.9 - - - -
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Residues in contact with CYS 287 (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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283A LYS* 2.8 38.1 + - - +
284A PHE* 3.5 8.1 - - + +
286A GLN* 1.3 76.6 - - - +
288A VAL* 1.3 63.3 + - + +
290A ASN 4.0 1.6 - - - -
291A PRO* 3.1 29.9 - - + +
296A CYS* 1.9 59.7 - - + -
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Residues in contact with VAL 288 (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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135A PHE* 3.8 27.8 - - + -
138A VAL* 3.8 26.9 - - + +
139A GLN* 3.6 17.5 + - - +
141A ASP* 3.9 12.6 - - - +
284A PHE* 3.0 47.3 + - + +
285A LEU* 3.5 10.1 - - + +
286A GLN 3.2 0.2 - - - -
287A CYS* 1.3 81.1 - - + +
289A LYS* 1.3 59.2 + - - +
291A PRO* 4.2 6.8 - - - +
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Residues in contact with LYS 289 (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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134A GLN 5.7 0.4 - - - -
138A VAL* 3.7 37.0 - - + -
139A GLN* 5.9 0.7 + - - -
285A LEU* 3.1 30.6 + - - +
286A GLN* 3.2 17.5 + - - +
288A VAL* 1.3 77.6 - - - +
290A ASN* 1.3 74.8 + - - +
291A PRO* 3.8 5.1 - - - +
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Residues in contact with ASN 290 (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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286A GLN* 2.9 38.1 + - + +
287A CYS* 3.5 6.3 - - - +
289A LYS* 1.3 91.4 + - - +
291A PRO* 1.3 68.9 - - - +
293A ASP* 4.8 1.3 + - - +
294A SER* 4.4 10.0 + - - +
296A CYS* 4.2 6.4 - - - -
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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