1hcu
From Proteopedia
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| - | [[Image:1hcu.gif|left|200px]]<br /><applet load="1hcu" size=" | + | [[Image:1hcu.gif|left|200px]]<br /><applet load="1hcu" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1hcu, resolution 2.37Å" /> | caption="1hcu, resolution 2.37Å" /> | ||
'''ALPHA-1,2-MANNOSIDASE FROM TRICHODERMA REESEI'''<br /> | '''ALPHA-1,2-MANNOSIDASE FROM TRICHODERMA REESEI'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1HCU is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Hypocrea_jecorina Hypocrea jecorina] with NAG and CA as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Mannosyl-oligosaccharide_1,2-alpha-mannosidase Mannosyl-oligosaccharide 1,2-alpha-mannosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.113 3.2.1.113] Known structural/functional Site: <scene name='pdbsite=CAA:Ca Binding Site For Chain D'>CAA</scene>. Full crystallographic information is available from [http:// | + | 1HCU is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Hypocrea_jecorina Hypocrea jecorina] with <scene name='pdbligand=NAG:'>NAG</scene> and <scene name='pdbligand=CA:'>CA</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Mannosyl-oligosaccharide_1,2-alpha-mannosidase Mannosyl-oligosaccharide 1,2-alpha-mannosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.113 3.2.1.113] Known structural/functional Site: <scene name='pdbsite=CAA:Ca+Binding+Site+For+Chain+D'>CAA</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HCU OCA]. |
==Reference== | ==Reference== | ||
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[[Category: glycosylation]] | [[Category: glycosylation]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Feb 3 09:48:34 2008'' |
Revision as of 07:48, 3 February 2008
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ALPHA-1,2-MANNOSIDASE FROM TRICHODERMA REESEI
Overview
The process of N-glycosylation of eukaryotic proteins involves a range of, host enzymes that delete or add saccharide monomers. While endoplasmic, reticulum (E.R.) mannosidases cleave only one mannose to produce the Man8B, isomer, an alpha-1,2-mannosidase from Trichoderma reesei can sequentially, cleave all four 1,2-linked mannose sugars from a Man(9)GlcNAc(2), oligosaccharide, a feature reminiscent of the activity of Golgi, mannosidases. We now report the structure of the T. reesei enzyme at 2.37, A resolution. The enzyme folds as an (alpha alpha)(7) barrel. The, substrate-binding site of the T. reesei mannosidase differs appreciably, from the Saccharomyces cerevisiae enzyme. In the former, shorter loops at, the surface allow substrate protein to come closer to the catalytic site., There is more internal space available, so that different oligosaccharide, conformations are sterically allowed in the T. reesei, alpha-1,2-mannosidase.
About this Structure
1HCU is a Single protein structure of sequence from Hypocrea jecorina with and as ligands. Active as Mannosyl-oligosaccharide 1,2-alpha-mannosidase, with EC number 3.2.1.113 Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Trichoderma reesei alpha-1,2-mannosidase: structural basis for the cleavage of four consecutive mannose residues., Van Petegem F, Contreras H, Contreras R, Van Beeumen J, J Mol Biol. 2001 Sep 7;312(1):157-65. PMID:11545593
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