1szn
From Proteopedia
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| - | [[Image:1szn.gif|left|200px]] | + | [[Image:1szn.gif|left|200px]] |
| - | + | ||
| - | '''THE STRUCTURE OF ALPHA-GALACTOSIDASE''' | + | {{Structure |
| + | |PDB= 1szn |SIZE=350|CAPTION= <scene name='initialview01'>1szn</scene>, resolution 1.54Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Alpha-galactosidase Alpha-galactosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.22 3.2.1.22] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''THE STRUCTURE OF ALPHA-GALACTOSIDASE''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1SZN is a [ | + | 1SZN is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Hypocrea_jecorina Hypocrea jecorina]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SZN OCA]. |
==Reference== | ==Reference== | ||
| - | Crystal structure of alpha-galactosidase from Trichoderma reesei and its complex with galactose: implications for catalytic mechanism., Golubev AM, Nagem RA, Brandao Neto JR, Neustroev KN, Eneyskaya EV, Kulminskaya AA, Shabalin KA, Savel'ev AN, Polikarpov I, J Mol Biol. 2004 May 28;339(2):413-22. PMID:[http:// | + | Crystal structure of alpha-galactosidase from Trichoderma reesei and its complex with galactose: implications for catalytic mechanism., Golubev AM, Nagem RA, Brandao Neto JR, Neustroev KN, Eneyskaya EV, Kulminskaya AA, Shabalin KA, Savel'ev AN, Polikarpov I, J Mol Biol. 2004 May 28;339(2):413-22. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15136043 15136043] |
[[Category: Alpha-galactosidase]] | [[Category: Alpha-galactosidase]] | ||
[[Category: Hypocrea jecorina]] | [[Category: Hypocrea jecorina]] | ||
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[[Category: (beta/alpha)8 barrel]] | [[Category: (beta/alpha)8 barrel]] | ||
[[Category: glycoprotein]] | [[Category: glycoprotein]] | ||
| - | [[Category: two | + | [[Category: two domain]] |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:11:41 2008'' |
Revision as of 12:11, 20 March 2008
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| , resolution 1.54Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Activity: | Alpha-galactosidase, with EC number 3.2.1.22 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
THE STRUCTURE OF ALPHA-GALACTOSIDASE
Overview
The crystal structures of alpha-galactosidase from the mesophilic fungus Trichoderma reesei and its complex with the competitive inhibitor, beta-d-galactose, have been determined at 1.54 A and 2.0 A resolution, respectively. The alpha-galactosidase structure was solved by the quick cryo-soaking method using a single Cs derivative. The refined crystallographic model of the alpha-galactosidase consists of two domains, an N-terminal catalytic domain of the (beta/alpha)8 barrel topology and a C-terminal domain which is formed by an antiparallel beta-structure. The protein contains four N-glycosylation sites located in the catalytic domain. Some of the oligosaccharides were found to participate in inter-domain contacts. The galactose molecule binds to the active site pocket located in the center of the barrel of the catalytic domain. Analysis of the alpha-galactosidase- galactose complex reveals the residues of the active site and offers a structural basis for identification of the putative mechanism of the enzymatic reaction. The structure of the alpha-galactosidase closely resembles those of the glycoside hydrolase family 27. The conservation of two catalytic Asp residues, identified for this family, is consistent with a double-displacement reaction mechanism for the alpha-galactosidase. Modeling of possible substrates into the active site reveals specific hydrogen bonds and hydrophobic interactions that could explain peculiarities of the enzyme kinetics.
About this Structure
1SZN is a Single protein structure of sequence from Hypocrea jecorina. Full crystallographic information is available from OCA.
Reference
Crystal structure of alpha-galactosidase from Trichoderma reesei and its complex with galactose: implications for catalytic mechanism., Golubev AM, Nagem RA, Brandao Neto JR, Neustroev KN, Eneyskaya EV, Kulminskaya AA, Shabalin KA, Savel'ev AN, Polikarpov I, J Mol Biol. 2004 May 28;339(2):413-22. PMID:15136043
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