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Expression of double Vitreoscilla hemoglobin enhances growth and alters ribosome and tRNA levels in Escherichia coli

In English

Författare

Summary, in English

In several organisms, expression of a gene encoding dimeric hemoglobin (VHb) from the obligate aerobic bacterium Vatreoscilla stercoraria has been shown to increase microaerobic cell growth and enhance oxygen-dependent cell metabolism. In an attempt to further improve these effects of VHb, a gene encoding two vhb genes connected by a short linker of six base pairs was constructed and expressed in Escherichia cola (double VHb). Escherichia cola cells expressing double VHb reached a cell density 19% higher than that of cells expressing native VHb. The protein production per cell remained constant since the increase in cell growth was accompanied by an increase in protein content by 16%. Investigation of ribosome and tRNA content revealed that cells expressing double VHb reached their maximal capacity of protein synthesis later during cultivation than cells expressing native VHb, and furthermore they reached considerably higher levels of ribosome and tRNA compared to that of the VHb-expressing cells.

Publiceringsår

2002

Språk

Engelska

Sidor

652-656

Publikation/Tidskrift/Serie

Biotechnology Progress

Volym

18

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

The American Chemical Society (ACS)

Ämne

  • Biochemistry and Molecular Biology
  • Analytical Chemistry

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1520-6033