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Title: An acetylatable lysine controls CRP function in E. coli

Journal Article · · Molecular Microbiology
DOI:https://doi.org/10.1111/mmi.13874· OSTI ID:1410133
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [3];  [4];  [3];  [5]; ORCiD logo [5]; ORCiD logo [2]; ORCiD logo [1]
  1. Department of Microbiology and Immunology, Stritch School of Medicine, Health Sciences Division Loyola University Chicago Maywood IL 60153 USA
  2. Department of Biochemistry and Molecular Biology (B) and Immunology, Faculty of Chemistry University of Murcia, Campus of Espinardo, Regional Campus of International Excellence ‘‘Campus Mare Nostrum’’ Murcia E‐30100 Spain
  3. Department of Biochemistry and Molecular Genetics Center for Structural Genomics of Infectious Diseases, Northwestern University Feinberg School of Medicine Chicago IL 60611 USA
  4. Loyola Genomics Facility, Stritch School of Medicine, Health Sciences Division Loyola University Chicago Maywood IL 60153 USA
  5. Buck Institute for Research on Aging Novato CA 94945 USA

Summary Transcriptional regulation is the key to ensuring that proteins are expressed at the proper time and the proper amount. In Escherichia coli , the transcription factor cAMP receptor protein (CRP) is responsible for much of this regulation. Questions remain, however, regarding the regulation of CRP activity itself. Here, we demonstrate that a lysine (K100) on the surface of CRP has a dual function: to promote CRP activity at Class II promoters, and to ensure proper CRP steady state levels. Both functions require the lysine's positive charge; intriguingly, the positive charge of K100 can be neutralized by acetylation using the central metabolite acetyl phosphate as the acetyl donor. We propose that CRP K100 acetylation could be a mechanism by which the cell downwardly tunes CRP‐dependent Class II promoter activity, whilst elevating CRP steady state levels, thus indirectly increasing Class I promoter activity. This mechanism would operate under conditions that favor acetate fermentation, such as during growth on glucose as the sole carbon source or when carbon flux exceeds the capacity of the central metabolic pathways.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐SC00124430
OSTI ID:
1410133
Journal Information:
Molecular Microbiology, Journal Name: Molecular Microbiology Vol. 107 Journal Issue: 1; ISSN 0950-382X
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
FAO
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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