scholarly journals Initiation factor and ribosome levels are coordinately controlled in Escherichia coli growing at different rates.

1983 ◽  
Vol 258 (3) ◽  
pp. 1954-1959
Author(s):  
J G Howe ◽  
J W Hershey
Keyword(s):  
Escherichia Coli ◽  
Initiation Factor

scholarly journals Phosphorylation of Initiation Factor IF-2 from Escherichia coli with Skeletal Muscle Kinase

1972 ◽  
Vol 247 (19) ◽  
pp. 6365-6367
Author(s):  
John L. Fakunding ◽  
Jolinda A. Traugh ◽  
Robert R. Traut ◽  
John W.B. Hershey
Keyword(s):  
Escherichia Coli ◽  
Skeletal Muscle ◽  
Initiation Factor

scholarly journals Genetic Interaction Screens with Ordered Overexpression and Deletion Clone Sets Implicate the Escherichia coli GTPase YjeQ in Late Ribosome Biogenesis

2008 ◽  
Vol 190 (7) ◽  
pp. 2537-2545 ◽  
Author(s):  
Tracey L. Campbell ◽  
Eric D. Brown
Keyword(s):  
Escherichia Coli ◽  
Ribosome Biogenesis ◽  
Slow Growth ◽  
Genetic Interaction ◽  
Initiation Factor ◽  
Genetic Screens ◽  
Genomic Libraries ◽  
Initiation Factor 2 ◽  
Bona Fide

ABSTRACT The Escherichia coli protein YjeQ is a circularly permuted GTPase that is broadly conserved in bacteria. An emerging body of evidence, including cofractionation and in vitro binding to the ribosome, altered polysome profiles after YjeQ depletion, and stimulation of GTPase activity by ribosomes, suggests that YjeQ is involved in ribosome function. The growth of strains lacking YjeQ in culture is severely compromised. Here, we probed the cellular function of YjeQ with genetic screens of ordered E. coli genomic libraries for suppressors and enhancers of the slow-growth phenotype of a ΔyjeQ strain. Screening for suppressors using an ordered library of 374 clones overexpressing essential genes and genes associated with ribosome function revealed that two GTPases, Era and initiation factor 2, ameliorated the growth and polysome defects of the ΔyjeQ strain. In addition, seven bona fide enhancers of slow growth were identified (Δtgt, ΔksgA, ΔssrA, ΔrimM, ΔrluD, ΔtrmE/mnmE, and ΔtrmU/mnmA) among 39 deletions (in genes associated with ribosome function) that we constructed in the ΔyjeQ genetic background. Taken in context, our work is most consistent with the hypothesis that YjeQ has a role in late 30S subunit biogenesis.

Sign in / Sign up

Export Citation Format

Share Document