The functioning of the SRP receptor FtsY in protein-targeting in E. coli is correlated with its ability to bind and hydrolyse GTP

Ron Kusters, Georg Lentzen, Elaine Eppens, Anton van Geel, Coen C. van der Weijden, Wolfgang Wintermeyer, Joen Luirink*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

42 Citations (Scopus)

Abstract

In this study, we have established that FtsY, the E. coli homolog of the mammalian signal recognition particle (SRP) receptor, is a GTP-binding protein which displays intrinsic GTPase activity. GTP was found to influence the protease sensitivity of FtsY indicative of a conformational change. FtsY mutated in the 4th GTP-binding consensus element displayed reduced GTP-binding and -hydrolysis which correlated with a reduced ability to interact with SRP. Overexpression of the mutant proteins had a stronger inhibitory effect on protein translocation than overexpression of wild-type FtsY. These observations suggest that in E. coli GTP is important for proper functioning of FtsY in protein-targeting.

Original languageEnglish
Pages (from-to)253-258
Number of pages6
JournalFEBS letters
Volume372
Issue number2-3
DOIs
Publication statusPublished - 25 Sep 1995
Externally publishedYes

Keywords

  • Escherichia coli
  • FtsY
  • Protein-targeting
  • Signal recognition particle

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