Crystal structure of fuculose aldolase from the Antarctic psychrophilic yeast Glaciozyma antarctica PI12

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• 作者：Nardiah Rizwana Jaafar ; Dene Littler ; Travis Beddoe ; Jamie Rossjohn ; Rosli Md Illias ; Nor Muhammad Mahadi ; Mukram Mohamed Mackeen ; Abdul Munir Abdul Murad and Farah Diba Abu Bakar
• 关键词：psychrophiles ; crystallization ; metalloenzymes ; fuculose aldolase ; l-fuculose metabolism ; Glaciozyma antarctica ; imino cyclitols
• 刊名：Acta Crystallographica Section F
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：72
• 期：11
• 页码：831-839
• 全文大小：1539K
• ISSN：1744-3091

文摘

Fuculose-1-phosphate aldolase (FucA) catalyses the reversible cleavage of l-fuculose 1-phosphate to dihydroxyacetone phosphate (DHAP) and l-lactaldehyde. This enzyme from mesophiles and thermophiles has been extensively studied; however, there is no report on this enzyme from a psychrophile. In this study, the gene encoding FucA from Glaciozyma antarctica PI12 (GaFucA) was cloned and the enzyme was overexpressed in Escherichia coli, purified and crystallized. The tetrameric structure of GaFucA was determined to 1.34 Å resolution. The overall architecture of GaFucA and its catalytically essential histidine triad are highly conserved among other fuculose aldolases. Comparisons of structural features between GaFucA and its mesophilic and thermophilic homologues revealed that the enzyme has typical psychrophilic attributes, indicated by the presence of a high number of nonpolar residues at the surface and a lower number of arginine residues.