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1je9

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{{STRUCTURE_1je9| PDB=1je9 | SCENE= }}
{{STRUCTURE_1je9| PDB=1je9 | SCENE= }}
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'''NMR SOLUTION STRUCTURE OF NT2'''
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===NMR SOLUTION STRUCTURE OF NT2===
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==Overview==
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Three homologous short-chain neurotoxins, named NT1, NT2 and NT3, were purified from the venom of Naja kaouthia. NT1 has an identical amino acid sequence to cobrotoxin from Naja naja atra [Biochemistry 32 (1993) 2131]. NT3 shares the same sequence with cobrotoxin b [J. Biochem. (Tokyo) 122 (1997) 1252], whereas NT2 is a novel 61-residue neurotoxin. Tests of their physiological functions indicate that NT1 shows a greater inhibition of muscle contraction induced by electrical stimulation of the nerve than do NT2 and NT3. Homonuclear proton two-dimensional NMR methods were utilized to study the solution tertiary structure of NT2. A homology model-building method was employed to predict the structure of NT3. Comparison of the structures of these three toxins shows that the surface conformation of NT1 facilitates the substituted base residues, Arg28, Arg30, and Arg36, to occupy the favorable spatial location in the central region of loop II, and the cation groups of all three arginines face out of the molecular surface of NT1. This may contribute greatly to the higher binding of NT1 with AchR compared to NT2 and NT3.
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(as it appears on PubMed at http://www.pubmed.gov), where 11904231 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11904231}}
==About this Structure==
==About this Structure==
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1JE9 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Naja_kaouthia Naja kaouthia]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JE9 OCA].
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1JE9 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Naja_kaouthia Naja kaouthia]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JE9 OCA].
==Reference==
==Reference==
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[[Category: Postsynaptic neurotoxin]]
[[Category: Postsynaptic neurotoxin]]
[[Category: Veonm]]
[[Category: Veonm]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 21:07:01 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 20:06:34 2008''

Revision as of 17:06, 1 July 2008

Image:1je9.png

Template:STRUCTURE 1je9

NMR SOLUTION STRUCTURE OF NT2

Template:ABSTRACT PUBMED 11904231

About this Structure

1JE9 is a Single protein structure of sequence from Naja kaouthia. Full experimental information is available from OCA.

Reference

Structure-function relationship of three neurotoxins from the venom of Naja kaouthia: a comparison between the NMR-derived structure of NT2 with its homologues, NT1 and NT3., Cheng Y, Meng Q, Wang W, Wang J, Biochim Biophys Acta. 2002 Feb 11;1594(2):353-63. PMID:11904231

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