Small prokaryotic DNA-binding proteins protect genome integrity throughout the life cycle

Katja Molan (Author), Darja Žgur-Bertok (Author)

Abstract

Genomes of all organisms are persistently threatened by endogenous and exogenous assaults. Bacterial mechanisms of genome maintenance must provide protection throughout the physiologically distinct phases of the life cycle. Spore-forming bacteria must also maintain genome integrity within the dormant endospore. The nucleoid-associated proteins (NAPs) influence nucleoid organization and may alter DNA topology to protect DNA or to alter gene expression patterns. NAPs are characteristically multifunctional; nevertheless, Dps, HU and CbpA are most strongly associated with DNA protection. Archaea display great variety in genome organization and many inhabit extreme environments. As of yet, only MC1, an archaeal NAP, has been shown to protect DNA against thermal denaturation and radiolysis. ssDNA are intermediates in vital cellular processes, such as DNA replication and recombination. Single-stranded binding proteins (SSBs) prevent the formation of secondary structures but also protect the hypersensitive ssDNA against chemical and nuclease degradation. Ionizing radiation upregulates SSBs in the extremophile Deinococcus radiodurans.

Keywords

DNA protection;nucleoid-associated proteins;small acid soluble proteins;single-stranded DNA-binding proteins;

Data

Language:	English
Year of publishing:	2022
Typology:	1.02 - Review Article
Organization:	UL BF - Biotechnical Faculty
UDC:	579.25:575.111
COBISS:	103764739
ISSN:	1422-0067
Views:	40
Downloads:	27
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	molekularna genetika;genom;DNA;proteini;
Type (COBISS):	Scientific work
Pages:	str. 1-15, art. 4008
Volume:	ǂVol. ǂ23
Issue:	ǂiss. ǂ7
Chronology:	2022
DOI:	10.3390/ijms23074008
ID:	15664335