Inhibiting NAD+-dependent DNA ligase activity with 2-(cyclopentyloxy)-5'-deoxyadenosine (CPOdA) offers a new tool for DNA replication and repair studies in the model archaeon Haloferax volcanii.
FEMS Microbiol Lett
; 362(21)2015 Nov.
Article
in En
| MEDLINE
| ID: mdl-26420852
ABSTRACT
DNA ligases play an essential role in many aspects of DNA metabolism in all three domains of life. The haloarchaeal organism Haloferax volcanii encodes both ATP- and NAD(+)-dependent DNA ligase enzymes designated LigA and LigN, respectively. Neither LigA nor LigN alone is required for cell viability but they share an essential function, most likely the ligation of Okazaki fragments during chromosome replication. Here we show that 2-(cyclopentyloxy)-5'-deoxyadenosine (referred to as CPOdA), originally developed as a inhibitor of bacterial NAD(+)-dependent DNA ligases, is a potent inhibitor of the growth of Hfx. volcanii cells expressing LigN alone, causing chromosome fragmentation and cell death, while cells expressing LigA are unaffected. Growth inhibition occurs at significantly lower CPOdA concentrations (MIC ≤ 50 ng ml(-1)) than those required for inhibition of bacterial growth (≥2 µg ml(-1)). CPOdA has the potential to become a vital tool in DNA replication and repair studies in this important model organism.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
DNA Ligases
/
Haloferax volcanii
/
DNA Replication
/
Enzyme Inhibitors
Language:
En
Journal:
FEMS Microbiol Lett
Year:
2015
Document type:
Article
Affiliation country: