Cited by 332Bacterial Genetics and BiotechnologyRNA and protein synthesis mechanismsHeat shock proteins research

The E. coli signal recognition particle is required for the insertion of a subset of inner membrane proteins.

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Ulbrandt, Nancy D, Newitt, John A, Bernstein, Harris D·1997·Cell

Abstract

E. coli homologs of the signal recognition particle (SRP) and its receptor are essential for viability, but their role in protein export is unclear. To elucidate their function, we devised a genome-wide screen to identify genes that encode SRP substrates. Inhibition of the SRP pathway sharply blocked the membrane insertion of several polytopic inner membrane proteins (IMPs) that were predicted to be SRP substrates, but had a smaller effect on the insertion of other IMPs and no significant effect on preprotein translocation. Our results suggest that whereas most E. coli preproteins and some IMPs can utilize SRP-independent targeting pathways effectively, the structural features of a subset of IMPs have required the conservation of an SRP-based targeting machinery.

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  • The SRP pathway is a universally conserved targeting system that bacteria primarily use for inner membrane proteins.

    “The SRP pathway is a universally conserved targeting system that bacteria primarily use for inner membrane proteins”

    From The Dynamic SecYEG Translocon (2021) · cites this paper as Ulbrandt et al., 1997

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Authors
Ulbrandt, N. D., Newitt, J. A., & Bernstein, H. D.
Affiliations
National Institutes of Health (US)
Corresponding author
  • Newitt, John A
  • Bernstein, Harris D
Venue
Cell
Publisher
Elsevier BV
Published
1997-01
Volume
88
Issue
2
Pages
187-196
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2000023769
Cited by
332
References
49
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 4 · 2021: 7 · 2020: 4 · 2019: 6 · 2018: 5 · 2017: 9 · 2016: 7 · 2015: 2 · 2014: 8 · 2013: 13 · 2012: 9
FWCI
19.14
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
Keywords
signal recognition particle, SRP receptor, polytopic membrane proteins, protein targeting, genome-wide screen, preprotein translocation, Escherichia coli
MeSH terms
Bacterial Proteins, Biological Transport, Escherichia coli, Genes, Bacterial, Membrane Proteins, Phenotype, Protein Precursors, Recombinant Fusion Proteins, Transformation, Bacterial, Mutagenesis, Site-Directed, Receptors, Cytoplasmic and Nuclear, Signal Recognition Particle, Escherichia coli Proteins

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