The crystal structure of acidic beta-galactosidase from Aspergillus oryzae.
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Maksimainen MM, Lampio A, Mertanen M, Turunen O, Rouvinen J
The crystal structure of acidic beta-galactosidase from Aspergillus oryzae.
Int J Biol Macromol. 2013 Sep;60:109-15. doi: 10.1016/j.ijbiomac.2013.05.003. Epub 2013 May 17.
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- 23688418 [ View in PubMed]
- Abstract
The crystal structure of the industrially important Aspergillus oryzae beta-galactosidase has been determined at 2.60 A resolution. The Ao-beta-gal is a large (985 residues) monomeric multi-domain enzyme that has a catalytic (alpha/beta)8-barrel domain. An electron density map revealed extensive N-glycosylation between the domain interfaces suggesting that the oligosaccharide-chains would have a stabilizing role for the structure of Ao-beta-gal. Comparison of structure with other beta-galactosidase structures of glycoside hydrolase family 35 revealed a number of hydrophobic residues, which may contribute favorably to the stabilization of the structure. The role of a high number of acidic residues in Ao-beta-gal is also discussed.
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