The Distribution of , -Diaminopimelic Acid among various Micro-organisms
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چکیده
منابع مشابه
The enzymic degradation of laminarin. 1. The distribution of laminarinase among micro-organisms.
P-Glucans occur in micro-organisms and higher plants as structural constituents of cell walls, as reserve materials and as extracellular substances of uncertain significance. Laninarin is such a reserve polysaccharide in many Phaeophyceae and it can be regarded as a mannitol-containing fl-D-glucan in which the main polymeric linkage is fl-(1-+3). Enzymes hydrolysing fi-D-(1-+3)-glucans have bee...
متن کاملHaem Synthase and Cobalt Porphyrin Synthase in Various Micro-organisms.
1. The preparation of a crude extract of Clostridium tetanomorphum containing cobalt porphyrin synthase but little haem-synthase activity is described. 2. The properties of cobalt porphyrin synthase in the clostridial extracts is compared with the properties of a haem synthase present in crude extracts of the yeast Torulopsis utilis. 3. Cobalt porphyrin synthase in extracts of C. tetanomorphum ...
متن کاملBiosynthesis of diaminopimelic acid and lysine in Escherichia coli. 1. The incorporation of C from various organic precursors into the diaminopimelic acid of a lysine-requiring mutant.
Diaminopimelic acid, which is widely distributed in bacteria, is converted into lysine by a specific decarboxylase (Work & Dewey, 1953; Dewey, Hoare & Work, 1954; Antia, Hoare & Work, 1957), and it has been suggested as an immediate precursor of lysine in some bacteria. A mutant of Escherichia coli deficient in the decarboxylase requires lysine for growth and accumulates diaminopimelic acid in ...
متن کاملThe reduction step in diaminopimelic acid biosynthesis.
In order to facilitate the elucidation of the remaining undetermined steps in diaminopimelic acid and lysine biosynthesis, mutants blocked in the pathway between aspartic semialdehyde and a-N-succinyl-e-ket.opimelic acid were sought. A mutant (M-203) with a requirement for diaminopimelate and lysine was obtained. An examination of the enzymatic composition of the extract prepared from the mutan...
متن کاملThe enzymatic synthesis of diaminopimelic acid.
a-e-Diaminopimelic acid was discovered by Work in 1949 (1) as a constituent of Corynebacterium diphtheriae. It was also described as occurring in a peptide fraction obtained from Mycobacterium tuberculosis by Asselineau et al. (2). Since the time of these reports distribution of the amino acid has been systematically investigated by Work (3). She found the compound to be generally present in th...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1953
ISSN: 0022-1287
DOI: 10.1099/00221287-9-3-394