Single-channel characterization of the chitooligosaccharide transporter chitoporin (SmChiP) from the opportunistic pathogen Serratia marcescens

Soysa, H. Sasimali M.; Kumsaoad, Sawitree; Amornloetwattana, Rawiporn; Watanabe, Takeshi; Suginta, Wipa

doi:10.1016/j.jbc.2022.102487

Cited by 1 publication

(1 citation statement)

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“…It is a versatile microorganism with vast potential for applications. S. marcescens has the ability to utilize a diverse array of carbon sources, including glucose, sucrose, 9 or glycerol, 10 along with other carbon sources such as xylose, arabinose, gibberellins, 11 loctotriose, and mannitol. However, the growth rates differed among the various carbon sources.…”

Section: Introductionmentioning

confidence: 99%

Construction and characterization of a promoter library with varying strengths to enhance acetoin production from xylose in Serratia marcescens

Liu,

Sun

et al. 2024

Biotech and App Biochem

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Serratia marcescens is utilized as a significant enterobacteria in the production of various high‐value secondary metabolites. Acetoin serves as a crucial foundational compound of development and finds application in a broad range of fields. Furthermore, S. marcescens HBQA‐7 is capable of utilizing xylose as its exclusive carbon source for acetoin production. The objective of this study was to utilize a constitutive promoter screening strategy to enhance both xylose utilization and acetoin production in S. marcescens HBQA‐7. By utilizing RNA‐seq, we identified the endogenous constitutive promoter P6 that is the most robust, which facilitated the overexpression of the sugar transporter protein GlfL445I, α‐acetyl lactate synthase, and α‐acetyl lactate decarboxylase, respectively. The resultant recombinant strains exhibited enhanced xylose utilization rates and acetoin yields. Subsequently, a recombinant plasmid, denoted as pBBR1MCS‐P6‐glfL445IalsSalsD, was constructed, simultaneously expressing the aforementioned three genes. The resulting recombinant strain, designated as S3, demonstrated a 1.89‐fold boost in xylose consumption rate compared with the original strain during shake flask fermentation. resulting in the accumulation of 7.14 g/L acetoin in the final fermentation medium. Subsequently, in a 5 L fermenter setup, the acetoin yield reached 48.75 g/L, corresponding to a xylose‐to‐acetoin conversion yield of 0.375 g/g.

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Section: Introductionmentioning

confidence: 99%