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Titolo:
OSMOTIC ADAPTATION IN BREVIBACTERIUM LINENS - DIFFERENTIAL EFFECT OF PROLINE AND GLYCINE BETAINE ON CYTOPLASMIC OSMOLYTE POOL
Autore:
JEBBAR M; GOUESBET G; HIMDIKABBAB S; BLANCO C; BERNARD T;
Indirizzi:
UNIV RENNES 1,DEPT MEMBRANES & OSMOREGULAT,GENET & PHYSIOL MICROBIENNES LAB,CNRS,URA 256 F-35042 RENNES FRANCE UNIV RENNES 1,DEPT MEMBRANES & OSMOREGULAT,GENET & PHYSIOL MICROBIENNES LAB,CNRS,URA 256 F-35042 RENNES FRANCE UNIV RENNES 1,RECH PHYSICOCHIM STRUCT,CNRS,URA 704 F-35042 RENNES FRANCE
Titolo Testata:
Archives of microbiology
fascicolo: 5, volume: 163, anno: 1995,
pagine: 380 - 386
SICI:
0302-8933(1995)163:5<380:OAIBL->2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
ESCHERICHIA-COLI; COMPATIBLE SOLUTES; AMINO-ACID; LACTOBACILLUS-ACIDOPHILUS; STAPHYLOCOCCUS-AUREUS; HALOPHILIC EUBACTERIA; TRANSPORT; OSMOREGULATION; ACCUMULATION; TETRAHYDROPYRIMIDINES;
Keywords:
OSMOPROTECTION; BREVIBACTERIUM; ECTOINE; GLYCINE BETAINE; CHOLINE; PROLINE; GRAM-POSITIVE BACTERIA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
M. Jebbar et al., "OSMOTIC ADAPTATION IN BREVIBACTERIUM LINENS - DIFFERENTIAL EFFECT OF PROLINE AND GLYCINE BETAINE ON CYTOPLASMIC OSMOLYTE POOL", Archives of microbiology, 163(5), 1995, pp. 380-386

Abstract

In the coryneform Brevibacterium linens, ectoine constitutes the major intracellular solute accumulated under elevated medium osmolarity. Here we report that exogenously supplied proline, choline, glycine betaine, and even ectoine, protected bacterial cells against deleterious effects of a hyperosmotic constraint (i.e. 1.5 M NaCl). In all cases, asignificant improvement of growth was observed; in parallel, intracellular osmolyte pools composed mainly of glutamate and ectoine substantially increased, either with added glycine betaine (under Limiting supply) or with proline. However, these two osmoprotectants behaved differently: glycine betaine acted as a genuine osmoprotectant, whereas proline was accumulated only transiently and participated actively in thebiosynthesis of glutamate, ectoine, and trehalose. The strategy developed by B. linens cells allows the proposal of a novel role for proline in the osmoprotection process through its conversion to the apparently preferred endogenous osmolyte ectoine.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 04:40:25