Purine and pyrimidine transaminases in Escherichia coli*
نویسندگان
چکیده
منابع مشابه
The purine and pyrimidine metabolism of normal and phage-infected Escherichia coli.
In the Escherichia coli B-coliphage system, duplication of the “T-even” phages involves the active synthesis of desoxypentose nucleic acid (DNA) (1). This virus DNA differs in purine to pyrimidine ratio from that of the host cell (2-4) and cytosine has been reported absent in purified preparations of Tz phage (2). Although the synthesis of virus DNA proceeds mainly from nitrogen (5) and phospho...
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We have studied a protonated pyrimidine-purine-purine (Py-Pu-Pu) triplex, which is formed between the d(C)nd(G)n duplex and the d(AG)m oligonucleotide as the third strand and carries the CG*A+ protonated base-triads. We have observed such an intermolecular complex between a plasmid carrying the d(C)18 d(G)18 insert and the d(AG)5 oligonucleotide without bivalent cations in 200 mM of Na+ at pH4....
متن کاملPurine and pyrimidine metabolism.
The pathways of purine biosynthesis and degradation have been elucidated during the last 30 years; the regulation of the mechanisms involved is not yet fully understood, particularly with respect to quantitative aspects. Research into inborn errors of purine metabolism has provided valuable insights into purine synthesis and salvage pathways. Nutrition experiments using purine-free formula diet...
متن کاملThe purine metabolism of Escherichia coli.
Although many tracer studies on the purine metabolism of higher organisms have been reported, there are only preliminary data (1, 2) on the purine metabolism of Escherichiu coli, strain B, the host of the “T series” of bacteriophages. The work presented in this paper was undertaken concomitantly with an investigation of the purine metabolism of the virusinfected cell (3). The study of the purin...
متن کاملReview Purine and pyrimidine receptors
Adenosine 5’-triphosphate (ATP), in addition to its intracellular roles, acts as an extracellular signallingmolecule via a rich array of receptors, which have been cloned and characterised. P1 receptors are selective for adenosine, a breakdown product of ATP, produced after degradation by ectonucleotidases. Four subtypes have been identified, A1, A2A, A2B and A3 receptors. P2 receptors are acti...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1957
ISSN: 0306-3283
DOI: 10.1042/bj0670594