Analysis of carbohydrate-active enzymes in Thermogemmatispora sp. strain T81 reveals carbohydrate degradation ability

Canadian Journal of Microbiology
Atilio TomaziniDavid B Levin

Abstract

The phylum Chloroflexi is phylogenetically diverse and is a deeply branching lineage of bacteria that express a broad spectrum of physiological and metabolic capabilities. Members of the order Ktedonobacteriales, including the families Ktedonobacteriaceae, Thermosporotrichaceae, and Thermogemmatisporaceae, all have flexible aerobic metabolisms capable of utilizing a wide range of carbohydrates. A number of species within these families are considered cellulolytic and are capable of using cellulose as a sole carbon and energy source. In contrast, Ktedonobacter racemifer, the type strain of the order, does not appear to possess this cellulolytic phenotype. In this study, we confirmed the ability of Thermogemmatispora sp. strain T81 to hydrolyze cellulose, determined the whole-genome sequence of Thermogemmatispora sp. T81, and using comparative bioinformatics analyses, identified genes encoding putative carbohydrate-active enzymes (CAZymes) in the Thermogemmatispora sp. T81, Thermogemmatispora onikobensis, and Ktedonobacter racemifer genomes. Analyses of the Thermogemmatispora sp. T81 genome identified 64 CAZyme gene sequences belonging to 57 glycoside hydrolase families. The genome of Thermogemmatispora sp. T81 encodes 19 genes f...Continue Reading

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