Document Detail

Enhanced biofilm formation and/or cell viability by polyamines through stimulation of response regulators UvrY and CpxR in the two-component signal transducing systems, and ribosome recycling factor.
MedLine Citation:
PMID:  22814172     Owner:  NLM     Status:  Publisher    
We have reported that polyamines increase cell viability at the stationary phase of cell growth through translational stimulation of ribosome modulation factor, and SpoT and RpoZ proteins involved in the synthesis and function of ppGpp in Escherichia coli. Since biofilm formation is also involved in cell viability, we looked for proteins involved in biofilm formation and cell viability whose synthesis is stimulated by polyamines at the level of translation. It was found that the synthesis of response regulators UvrY and CpxR in the two-component signal transducing systems and ribosome recycling factor (RRF) was increased by polyamines at the level of translation. Polyamine stimulation of the synthesis of UvrY and RRF was dependent on the existence of the inefficient initiation codons UUG and GUG in uvrY and frr mRNA, respectively; and polyamine stimulation of CpxR synthesis was dependent on the existence of an unusual location of a Shine-Dalgarno (SD) sequence in cpxR mRNA. Biofilm formation and cell viability in the absence of polyamines was increased by transformation of modified uvrY and cpxR genes, and cell viability by modified frr gene whose translation occurs effectively without polyamines. The results indicate that polyamines are necessary for both biofilm formation and cell viability.
Akihiko Sakamoto; Yusuke Terui; Taku Yamamoto; Takuma Kasahara; Mizuho Nakamura; Hideyuki Tomitori; Kaneyoshi Yamamoto; Akira Ishihama; Anthony J Michael; Kazuei Igarashi; Keiko Kashiwagi
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-16
Journal Detail:
Title:  The international journal of biochemistry & cell biology     Volume:  -     ISSN:  1878-5875     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9508482     Medline TA:  Int J Biochem Cell Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Ltd.
Faculty of Pharmacy, Chiba Institute of Science, 15-8 Shiomi-cho, Choshi, Chiba 288-0025, Japan.
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