Species of family Promicromonosporaceae and family Cellulomonadeceae that produce cellulosome-like multiprotein complexes

Biotechnology Letters(2017)

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摘要
Objectives To screen the phylogenetically-nearest members of Cellulosimicrobium cellulans for the production of cellulosome-like multienzyme complexes and extracellular β-xylosidase activity against 7-xylosyltaxanes and to get corresponding molecular insights. Results Cellulosimicrobium (family Promicromonosporaceae ) and all genera of the family Cellulomonadeceaec produced both cellulosome-like multienzyme complexes and extracellular β-xylosidase activity, while the other genera of the family Promicromonosporaceae did not. Multiple sequence alignments further indicated that hypothetic protein M768_06655 might be a possible key subunit. Conclusion This is the first report that many actinobacteria species can produce cellulosome-like multienzyme complexes. The production of cellulosome-like complexes and the extracellular β-xylosidase activity against 7-xylosyltaxanes might be used to differentiate the genus Cellulosimicrobium from other genera of the family Promicromonosporaceae .
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关键词
Cellulomonadeceae,Cellulosome,Multienzyme complexes,Promicromonosporaceae,β-Xylosidase,7-Xylosyltaxanes
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