نتایج جستجو برای: ornithine decarboxylase

تعداد نتایج: 13700  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1990
S C Huang C A Panagiotidis E S Canellakis

We find that the transcription of various ribosomal proteins can be differentially affected by polyamines and by changes in growth rates. Using strain MG1655 of Escherichia coli K-12 (F-, lambda-), we have determined the effects of polyamines and changes in growth rate on the transcription of several ribosomal genes and the polyamine-synthesizing enzymes ornithine decarboxylase (L-ornithine car...

Journal: :Journal of Biological Chemistry 2006

Journal: :Journal of Biological Chemistry 1989

Journal: :Journal of Investigative Dermatology 1980

Journal: :Journal of bacteriology 2013
Andrea Romano Hein Trip Juke S Lolkema Patrick M Lucas

Lactic acid bacteria play a pivotal role in many food fermentations and sometimes represent a health threat due to the ability of some strains to produce biogenic amines that accumulate in foods and cause trouble following ingestion. These strains carry specific enzymatic systems catalyzing the uptake of amino acid precursors (e.g., ornithine and lysine), the decarboxylation inside the cell, an...

Journal: :Plant physiology 1985
H Birecka A J Bitonti P P McCann

A release of (14)CO(2) not related to ornithine decarboxylase activity was found in crude leaf extracts from Lycopersicon esculentum, Avena sativa, and especially from the pyrrolizidine alkaloid-bearing Heliotropium angiospermum when incubated with [1-(14)C]- or [U-(14)C]ornithine. The total (14)CO(2) produced was about 5- to 100-fold higher than that due to ornithine decarboxylase activities c...

Journal: :Circulation research 1972
S Matsushita R K Sogani M S Raben

Ornithine decarboxylase, a possible rate-limiting enzyme in the synthesis of polyamines, was assayed in hearts of normal rats, sham-operated rats, and rats subjected to aortic constriction. In the hearts of rats with constricted aortas, significantly increased enzyme activity compared with that in the hearts of sham-operated rats was observed 2, 4, 6, and 8 hours and 3, 5, and 10 days after ope...

Journal: :Applied and environmental microbiology 2012
Andrea Romano Hein Trip Aline Lonvaud-Funel Juke S Lolkema Patrick M Lucas

Biogenic amines are low-molecular-weight organic bases whose presence in food can result in health problems. The biosynthesis of biogenic amines in fermented foods mostly proceeds through amino acid decarboxylation carried out by lactic acid bacteria (LAB), but not all systems leading to biogenic amine production by LAB have been thoroughly characterized. Here, putative ornithine decarboxylatio...

Journal: :Blood 1978
W H Evans C K Grieshaber W C Miller S M Wilson H A Hoffman

Enriched fractions of mature and immature neutrophil granulocytes, isolated from guinea pig bone marrow, were assayed for ornithine decarboxylase activity and polyamine content. The results show that immature granulocytes contain at least ten times more ornithine decarboxylase activity and two times more spermidine than mature granulocytes. The incorporation of 14C-ornithine into putrescine and...

Journal: :Plant physiology 1988
H Birecka M Birecki E J Cohen A J Bitonti P P McCann

When tested for ornithine and arginine decarboxylases, pyrrolizidine alkaloid-bearing Senecio riddellii, S. longilobus (Compositae), and Crotalaria retusa (Leguminosae) plants exhibited only ornithine decarboxylase activity. This contrasts with previous studies of four species of pyrrolizidine alkaloid-bearing Heliotropium (Boraginaceae) in which arginine decarboxylase activity was very high re...

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