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Draft genome sequence of Parvularcula flava strain NH6-79 T, revealing its role as a cellulolytic enzymes producer

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Abstract

To date, the genus Parvularcula consists of 6 species and no potential application of this genus was reported. Current study presents the genome sequence of Parvularcula flava strain NH6-79 T and its cellulolytic enzyme analysis. The assembled draft genome of strain NH6-79 T consists of 9 contigs and 7 scaffolds with 3.68 Mbp in size and GC content of 59.87%. From a total of 3,465 genes predicted, 96 of them are annotated as glycoside hydrolases (GHs). Within these GHs, 20 encoded genes are related to cellulosic biomass degradation, including 12 endoglucanases (5 GH10, 4 GH5, and 3 GH51), 2 exoglucanases (GH9) and 6 β-glucosidases (GH3). In addition, highest relative enzyme activities (endoglucanase, exoglucanase, and β-glucosidase) were observed at 27th hour when the strain was cultured in the carboxymethyl cellulose/Avicel®-containing medium for 45 h. The combination of genome analysis with experimental studies indicated the ability of strain NH6-79 T to produce extracellular endoglucanase, exoglucanase, and β-glucosidase. These findings suggest the potential of Parvularcula flava strain NH6-79 T in cellulose-containing biomass degradation and that the strain could be used in cellulosic biorefining process.

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Acknowledgement

This work was supported by Fundamental Research Grant Scheme (FRGS) from the Ministry of Education Malaysia with project number 5F196. Mohamad Hamizan Abdul Karim thanks the National Postgraduate Fund Program of Universiti Teknologi Malaysia for scholarship support. Ming Quan Lam is grateful to Khazanah Watan Postgraduate (PhD) scholarship (scholar ID: 40852) from Yayasan Khazanah. Sye Jinn Chen thanks the Zamalah scholarship from Universiti Teknologi Malaysia.

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Mohamad Hamizan Abdul Karim carried out the experiment, analyzed the data and drafted the manuscript. Ming Quan Lam designed the experiment, assisted in bioinformatics analyses and provided the expertise. Sye Jinn Chen assisted in performing the experiments and provided the expertise. Chun Shiong Chong conceived of the presented idea, designed the experiment and provided knowledge. Adibah Yahya, Shafinaz Shahir and Mohd Shahir Shamsir provided the expertise. All authors read, edited, justified, and approved the final manuscript.

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Correspondence to Chun Shiong Chong.

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All authors declared that they have no conflict of interest.

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Communicated by Erko Stackebrandt.

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Abdul Karim, M.H., Lam, M.Q., Chen, S.J. et al. Draft genome sequence of Parvularcula flava strain NH6-79 T, revealing its role as a cellulolytic enzymes producer. Arch Microbiol 202, 2591–2597 (2020). https://doi.org/10.1007/s00203-020-01967-z

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  • DOI: https://doi.org/10.1007/s00203-020-01967-z

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