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1o7d

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{{STRUCTURE_1o7d| PDB=1o7d | SCENE= }}
{{STRUCTURE_1o7d| PDB=1o7d | SCENE= }}
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'''THE STRUCTURE OF THE BOVINE LYSOSOMAL A-MANNOSIDASE SUGGESTS A NOVEL MECHANISM FOR LOW PH ACTIVATION'''
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===THE STRUCTURE OF THE BOVINE LYSOSOMAL A-MANNOSIDASE SUGGESTS A NOVEL MECHANISM FOR LOW PH ACTIVATION===
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==Overview==
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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).
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{{ABSTRACT_PUBMED_12634058}}
==About this Structure==
==About this Structure==
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[[Category: Glycosyl hydrolase family 38]]
[[Category: Glycosyl hydrolase family 38]]
[[Category: Lysosomal]]
[[Category: Lysosomal]]
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Revision as of 12:50, 29 July 2008

Image:1o7d.png

Template:STRUCTURE 1o7d

THE STRUCTURE OF THE BOVINE LYSOSOMAL A-MANNOSIDASE SUGGESTS A NOVEL MECHANISM FOR LOW PH ACTIVATION

Template:ABSTRACT PUBMED 12634058

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

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