ArticleBMC plant biology2013
Identification of a type I Ca2+/Mg2+-dependent endonuclease induced in maize cells exposed to camptothecin.
Article in BMC plant biology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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Who cites it
3 citing papers in PubMed, 10 citations in OpenAlex.
- Structural and Functional Characterization of PR-4 SUGARWINs From Sugarcaneand Their Role in Plant Defense.Frontiers in plant science · 2018Article
- Membrane-related hallmarks of kinetin-induced PCD of root cortex cells.Plant cell reports · 2017Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
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Abstract
backgroundCamptothecin is a plant alkaloid that specifically binds topoisomerase I, inhibiting its activity and inducing double stranded breaks in DNA and activating the cell responses to DNA damage.
resultsMaize cultured cells were incubated in the presence of different concentrations of camptothecin. Camptothecin inhibits cultured cell growth, induces genomic DNA degradation, and induces a 32 kDa Ca2+/Mg2+-dependent nuclease activity. This nuclease, we called CaMNUC32, is inhibited by Zn2+ and by acid pH, it is mainly localized in the nucleus and it cleaves single- and double-stranded DNA, with a higher activity against single-stranded DNA. Two-dimensional electrophoresis combined with mass spectrometry suggests that CaMNUC32 is a member of the type I S1/P1 nuclease family. This type of nucleases are usually Zn2+-dependent but our results support previous indications that S1-type nucleases have a wide variety of enzyme activities, including Ca2+/Mg2+-dependent.
conclusionsWe have identified and characterized CaMNUC32, a 32 kDa Ca2+/Mg2+-dependent nuclease of the S1/P1 family induced by the topoisomerase I inhibitor camptothecin in maize cultured cells.
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