Contacts of the helix formed by residues 271 - 277 (chain A) in PDB entry 3N51
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 LEU 271 (chain A).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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241A TYR* 4.8 12.8 - - - +
245A SER* 5.1 0.4 - - - +
247A CYS* 4.0 26.2 - - + -
269A PHE 3.2 9.0 + - - +
270A GLU* 1.3 89.5 - - + +
272A PRO* 1.4 81.2 - - + +
273A GLN* 3.3 27.1 - - - +
274A TRP* 3.2 22.1 + - + +
275A LYS* 4.5 2.8 + - - +
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Residues in contact with PRO 272 (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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270A GLU 3.7 2.4 - - - +
271A LEU* 1.4 91.3 - - + +
273A GLN* 1.3 70.5 + - - +
274A TRP 3.0 6.2 + - - -
275A LYS* 3.0 29.5 + - + +
276A LYS* 4.6 0.9 + - - +
325A ASN* 5.6 1.3 - - - +
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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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244A LEU 4.6 3.5 - - - +
245A SER* 2.7 44.1 + - - +
247A CYS* 3.8 12.9 - - - -
271A LEU* 3.6 18.7 - - + +
272A PRO* 1.3 93.9 - - - +
274A TRP* 1.3 61.2 + - - +
275A LYS 3.2 0.4 - - - -
276A LYS* 3.5 26.9 + - - +
277A VAL* 3.8 11.6 - - - +
323A LEU* 5.6 0.9 - - - +
325A ASN* 3.0 34.2 - - + +
326A ALA* 4.8 4.5 - - + +
329A ASN* 3.1 13.1 + - - +
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Residues in contact with TRP 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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241A TYR* 3.4 45.5 + + - -
244A LEU* 3.9 19.5 - - + -
245A SER* 3.6 25.0 - - - -
269A PHE* 3.3 58.1 - + + +
271A LEU* 3.2 21.5 + - + +
272A PRO 3.0 1.6 + - - -
273A GLN* 1.3 75.4 - - - +
275A LYS* 1.3 64.5 + - + +
276A LYS 3.3 0.9 - - - -
277A VAL* 3.3 40.2 + - + +
282A LYS* 3.2 33.8 + - + +
285A ILE* 3.5 31.0 - - + -
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Residues in contact with LYS 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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269A PHE 6.2 0.4 - - - +
271A LEU 5.2 1.8 - - - +
272A PRO* 3.0 21.1 + - + +
274A TRP* 1.3 81.5 - - + +
276A LYS* 1.3 58.9 + - + +
277A VAL 3.1 8.5 + - - +
282A LYS* 5.2 8.3 - - - +
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Residues in contact with LYS 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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148A GLU* 3.6 9.2 - - - +
272A PRO 5.5 0.4 - - - +
273A GLN* 3.5 21.5 + - - +
274A TRP 3.3 1.0 - - - -
275A LYS* 1.3 78.9 - - + +
277A VAL* 1.3 61.0 + - - +
321A PRO* 4.8 21.1 - - + +
322A SER 3.6 18.6 - - - -
323A LEU* 4.1 23.5 - - + +
324A ASP* 3.8 20.0 - - - +
325A ASN* 4.3 13.5 - - - +
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Residues in contact with VAL 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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148A GLU* 3.5 8.5 - - - +
244A LEU* 3.9 26.5 - - + +
273A GLN 3.8 15.5 - - - +
274A TRP* 3.3 44.4 + - + +
275A LYS 3.1 6.0 - - - +
276A LYS* 1.3 84.8 - - - +
278A SER* 1.3 77.7 + - - +
279A GLU 3.6 0.9 + - - -
281A ALA* 3.6 19.5 - - + -
282A LYS* 3.6 8.6 + - + -
323A LEU* 4.7 8.3 - - + -
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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