Transcriptional Analysis of Degenerate Strain Clostridium Beijerinckii DG-8052 Reveals a Pleiotropic Response to CaCO-associated Recovery of Solvent Production

Overview

Journal Sci Rep

Specialty Science

Date 2016 Dec 15

PMID 27966599

Citations 6

Authors

Shengyin Jiao

Yan Zhang

Caixia Wan

Jia Lv

Renjia Du

Ruijuan Zhang

Bei Han

Affiliations

Soon will be listed here.

Abstract

Degenerate Clostridium beijerinckii strain (DG-8052) can be partially recovered by supplementing CaCO to fermentation media. Genome resequencing of DG-8052 showed no general regulator mutated. This study focused on transcriptional analysis of DG-8052 and its response to CaCO treatment via microarray. The expressions of 5168 genes capturing 98.6% of C. beijerinckii NCIMB 8052 genome were examed. The results revealed that with addition of CaCO 565 and 916 genes were significantly up-regulated, and 704 and 1044 genes significantly down-regulated at acidogenic and solventogenic phase of DG-8052, respectively. These genes are primarily responsible for glycolysis to solvent/acid production (poR, pfo), solventogensis (buk, ctf, aldh, adh, bcd) and sporulation (spo0A, sigE, sigma-70, bofA), cell motility and division (ftsA, ftsK, ftsY, ftsH, ftsE, mreB, mreC, mreD, rodA), and molecular chaperones (grpE, dnaK, dnaJ, hsp20, hsp90), etc. The functions of some altered genes in DG-8052, totalling 5.7% at acidogenisis and 8.0% at sovlentogenisis, remain unknown. The response of the degenerate strain to CaCO was suggested significantly pleiotropic. This study reveals the multitude of regulatory function that CaCO has in clostridia and provides detailed insights into degeneration mechanisms at gene regulation level. It also enables us to develop effective strategies to prevent strain degeneration in future.

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