1o7d
From Proteopedia
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'''THE STRUCTURE OF THE BOVINE LYSOSOMAL A-MANNOSIDASE SUGGESTS A NOVEL MECHANISM FOR LOW PH ACTIVATION''' | '''THE STRUCTURE OF THE BOVINE LYSOSOMAL A-MANNOSIDASE SUGGESTS A NOVEL MECHANISM FOR LOW PH ACTIVATION''' | ||
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[[Category: Schoehn, G.]] | [[Category: Schoehn, G.]] | ||
[[Category: Tollersrud, O K.]] | [[Category: Tollersrud, O K.]] | ||
- | [[Category: | + | [[Category: A-mannosidase]] |
- | [[Category: | + | [[Category: Glycosyl hydrolase family 38]] |
- | [[Category: | + | [[Category: Lysosomal]] |
- | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 03:28:33 2008'' | |
- | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + |
Revision as of 00:28, 3 May 2008
THE STRUCTURE OF THE BOVINE LYSOSOMAL A-MANNOSIDASE SUGGESTS A NOVEL MECHANISM FOR LOW PH ACTIVATION
Overview
Lysosomal alpha-mannosidase (LAM: EC 3.2.1.24) belongs to the sequence-based glycoside hydrolase family 38 (GH38). Two other mammalian GH38 members, Golgi alpha-mannosidase II (GIIAM) and cytosolic alpha-mannosidase, are expressed in all tissues. In humans, cattle, cat and guinea pig, lack of lysosomal alpha-mannosidase activity causes the autosomal recessive disease alpha-mannosidosis. Here, we describe the three-dimensional structure of bovine lysosomal alpha-mannosidase (bLAM) at 2.7A resolution and confirm the solution state dimer by electron microscopy. We present the first structure of a mammalian GH38 enzyme that offers indications for the signal areas for mannose phosphorylation, suggests a previously undetected mechanism of low-pH activation and provides a template for further biochemical studies of the family 38 glycoside hydrolases as well as lysosomal transport. Furthermore, it provides a basis for understanding the human form of alpha-mannosidosis at the atomic level. The atomic coordinates and structure factors have been deposited in the Protein Data Bank (accession codes 1o7d and r1o7dsf).
About this Structure
1O7D is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.
Reference
The structure of bovine lysosomal alpha-mannosidase suggests a novel mechanism for low-pH activation., Heikinheimo P, Helland R, Leiros HK, Leiros I, Karlsen S, Evjen G, Ravelli R, Schoehn G, Ruigrok R, Tollersrud OK, McSweeney S, Hough E, J Mol Biol. 2003 Mar 28;327(3):631-44. PMID:12634058 Page seeded by OCA on Sat May 3 03:28:33 2008