1xc6: Difference between revisions

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[[Image:1xc6.gif|left|200px]]
{{Seed}}
[[Image:1xc6.png|left|200px]]


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{{STRUCTURE_1xc6|  PDB=1xc6  |  SCENE=  }}  
{{STRUCTURE_1xc6|  PDB=1xc6  |  SCENE=  }}  


'''Native Structure Of Beta-Galactosidase from Penicillium sp. in complex with Galactose'''
===Native Structure Of Beta-Galactosidase from Penicillium sp. in complex with Galactose===




==Overview==
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Beta-galactosidases catalyze the hydrolysis of beta(1-3) and beta(1-4) galactosyl bonds in oligosaccharides as well as the inverse reaction of enzymatic condensation and transglycosylation. Here we report the crystallographic structures of Penicillium sp. beta-galactosidase and its complex with galactose solved by the SIRAS quick cryo-soaking technique at 1.90 A and 2.10 A resolution, respectively. The amino acid sequence of this 120 kDa protein was first assigned putatively on the basis of inspection of the experimental electron density maps and then determined by nucleotide sequence analysis. Primary structure alignments reveal that Penicillium sp. beta-galactosidase belongs to family 35 of glycosyl hydrolases (GHF-35). This model is the first 3D structure for a member of GHF-35. Five distinct domains which comprise the structure are assembled in a way previously unobserved for beta-galactosidases. Superposition of this complex with other beta-galactosidase complexes from several hydrolase families allowed the identification of residue Glu200 as the proton donor and residue Glu299 as the nucleophile involved in catalysis. Penicillium sp. beta-galactosidase is a glycoprotein containing seven N-linked oligosaccharide chains and is the only structure of a glycosylated beta-galactosidase described to date.
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{{ABSTRACT_PUBMED_15491613}}


==About this Structure==
==About this Structure==
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[[Category: Quick cryo soaking]]
[[Category: Quick cryo soaking]]
[[Category: Tim barrel domain]]
[[Category: Tim barrel domain]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 14:50:28 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 06:14:21 2008''

Revision as of 03:14, 29 July 2008

File:1xc6.png

Template:STRUCTURE 1xc6

Native Structure Of Beta-Galactosidase from Penicillium sp. in complex with Galactose

Template:ABSTRACT PUBMED 15491613

About this Structure

1XC6 is a Single protein structure of sequence from Penicillium sp.. Full crystallographic information is available from OCA.

Reference

Crystal structures of beta-galactosidase from Penicillium sp. and its complex with galactose., Rojas AL, Nagem RA, Neustroev KN, Arand M, Adamska M, Eneyskaya EV, Kulminskaya AA, Garratt RC, Golubev AM, Polikarpov I, J Mol Biol. 2004 Nov 5;343(5):1281-92. PMID:15491613

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