What question did this study set out to answer?

Investigate whether microRNAs systemically down-regulate nonessential copper-binding proteins in Arabidopsis to conserve copper during deficiency.

April 12, 2008Journal of Biological ChemistryOpen Access

MicroRNA-mediated Systemic Down-regulation of Copper Protein Expression in Response to Low Copper Availability in Arabidopsis

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Authors

SASalah E. Abdel‐GhanyColorado State University MPMarinus PilonColorado State University

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Implication

Laboratory study reveals microRNA-driven suppression of nonessential copper proteins in Arabidopsis during copper deficiency, suggesting a mechanism to preserve copper for essential functions.

Key Points

Investigate whether microRNAs systemically down-regulate nonessential copper-binding proteins in Arabidopsis to conserve copper during deficiency.
Experimentally validated target cleavage sites for miR397, miR408, and miR857.
Grew Arabidopsis plants hydroponically under varying copper concentrations to assess spatial microRNA and target mRNA expression profiles.
Analyzed the expression of laccase family members in wild-type plants and the microRNA maturation mutant hen1-1.
Cleavage site analysis confirmed that miR397, miR408, and miR857 directly target transcripts for plantacyanin and multiple laccases.
Hydroponic copper limitation induced accumulation of miR397, miR408, and miR857, which inversely correlated with plantacyanin and laccase transcript levels.
Down-regulation of several non-targeted laccases under low copper was disrupted in the hen1-1 mutant, pointing to a broader microRNA-dependent regulatory network.

Cite This Study

Abdel‐Ghany et al. (2008) studied this question.

synapsesocial.com/papers/69dff5babdd89ea53186058e https://doi.org/10.1074/jbc.m801406200

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Implication

Laboratory study reveals microRNA-driven suppression of nonessential copper proteins in Arabidopsis during copper deficiency, suggesting a mechanism to preserve copper for essential functions.

MicroRNA-mediated Systemic Down-regulation of Copper Protein Expression in Response to Low Copper Availability in Arabidopsis

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Implication

Key Points

Cite This Study

MicroRNA-mediated Systemic Down-regulation of Copper Protein Expression in Response to Low Copper Availability in Arabidopsis

Discussion

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Implication

Key Points

Cite This Study

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