4.7 Review

Microbial cell surface engineering for high-level synthesis of bio-products

Journal

BIOTECHNOLOGY ADVANCES
Volume 55, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biotechadv.2022.107912

Keywords

Mass transfer; Permeability; Metabolic engineering; Cell surface; Bacteria; Yeast

Funding

  1. National Natural Science Foundation of China [31900114]
  2. Natural Science Foundation of Shaanxi Province [2020JQ-702, 2020JQ-703]
  3. Shaanxi University of Science and Technology

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This article summarizes the important role of microbial cell surface layers in microbial engineering, introduces the strategies and methods of metabolic engineering using microbial cell surface components, and discusses the existing problems and future directions.
Microbial cell surface layers, which mainly include the cell membrane, cell wall, periplasmic space, outer membrane, capsules, S-layers, pili, and flagella, control material exchange between the cell and the extracellular environment, and have great impact on production titers and yields of various bio-products synthesized by microbes. Recent research work has made exciting achievements in metabolic engineering using microbial cell surface components as novel regulation targets without direct modifications of the metabolic pathways of the desired products. This review article will summarize the accomplishments obtained in this emerging field, and will describe various engineering strategies that have been adopted in bacteria and yeasts for the enhancement of mass transfer across the cell surface, improvement of protein expression and folding, modulation of cell size and shape, and re-direction of cellular resources, all of which contribute to the construction of more efficient microbial cell factories toward the synthesis of a variety of bio-products. The existing problems and possible future directions will also be discussed.

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