1pz8: Difference between revisions
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'''Modulation of agrin function by alternative splicing and Ca2+ binding''' | '''Modulation of agrin function by alternative splicing and Ca2+ binding''' | ||
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[[Category: Schulthess, T.]] | [[Category: Schulthess, T.]] | ||
[[Category: Stetefeld, J.]] | [[Category: Stetefeld, J.]] | ||
[[Category: | [[Category: Agrin]] | ||
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Revision as of 02:40, 3 May 2008
Modulation of agrin function by alternative splicing and Ca2+ binding
Overview
The aggregation of acetylcholine receptors on postsynaptic membranes is a key step in neuromuscular junction development. This process depends on alternatively spliced forms of the proteoglycan agrin with "B-inserts" of 8, 11, or 19 residues in the protein's globular C-terminal domain, G3. Structures of the neural B8 and B11 forms of agrin-G3 were determined by X-ray crystallography. The structure of G3-B0, which lacks inserts, was determined by NMR. The agrin-G3 domain adopts a beta jellyroll fold. The B insert site is flanked by four loops on one edge of the beta sandwich. The loops form a surface that corresponds to a versatile interaction interface in the family of structurally related LNS proteins. NMR and X-ray data indicate that this interaction interface is flexible in agrin-G3 and that flexibility is reduced by Ca(2+) binding. The plasticity of the interaction interface could enable different splice forms of agrin to select between multiple binding partners.
About this Structure
1PZ8 is a Single protein structure of sequence from Gallus gallus. Full crystallographic information is available from OCA.
Reference
Modulation of agrin function by alternative splicing and Ca2+ binding., Stetefeld J, Alexandrescu AT, Maciejewski MW, Jenny M, Rathgeb-Szabo K, Schulthess T, Landwehr R, Frank S, Ruegg MA, Kammerer RA, Structure. 2004 Mar;12(3):503-15. PMID:15016366 Page seeded by OCA on Sat May 3 05:40:25 2008
