Control of nucleic acid synthesis in Aspergillus nidulans
نویسندگان
چکیده
منابع مشابه
Transcriptional control of gluconeogenesis in Aspergillus nidulans.
Aspergillus nidulans can utilize carbon sources that result in the production of TCA cycle intermediates, thereby requiring gluconeogenesis. We have cloned the acuG gene encoding fructose-1,6 bisphosphatase and found that expression of this gene is regulated by carbon catabolite repression as well as by induction by a TCA cycle intermediate similar to the induction of the previously studied acu...
متن کاملRegulation and timing of deoxyribonucleic acid synthesis in hyphae of Aspergillus nidulans.
Pulse labeling of deoxyribonucleic acid (DNA) and radioautography have been used to study the effect of growth rate on nuclear replication in Aspergillus nidulans. When conidia were germinated in media supporting a fast growth rate, the radioactive pulse labeled either all of the nuclei in a cell or none of them. At slower growth rates, hyphae contained both labeled and unlabeled nuclei. Alteri...
متن کاملSynthesis of polyamines in the germinating conidia of Aspergillus nidulans.
In a number of biological systems undergoing accelerated growth there is a rapid accumulation of polyamines, particularly spermidine, in parallel with RNA. One of the first events in such systems is a rapid increase in the activity of ornithine decarboxylase to as much as 100 times control values (Williams-Ashman, 1972). However, the increase in the amount of polyamines is much less marked, usu...
متن کاملAspergillus nidulans
Light-dependent conidiation in the filamentous ascomycete, Aspergillus nidulans, is contingent on the allelic state of the velvet (veA) gene. Light dependence is abolished by a mutation in this gene (veAl) , which allows conidiation to occur in the absence of light. We have isolated and characterized six extragenic suppressors of veAl that restore the light-dependent conidiation phenotype. Alle...
متن کاملMitosis in Aspergillus nidulans.
Mitosis in growing hyphae of haploid and diploid Aspergillus nidulans has been studied with the light microscope in Helly-fixed preparations. At the periphery of the nucleus a sharply defined granule is invariably found which has strong affinity for acid fuchsin. Mitosis begins with the duplication of this granule and the development inside the nucleus of a gradually lengthening fibre between t...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1972
ISSN: 0306-3283
DOI: 10.1042/bj1270018pa