Ogataea angusta DL1 strain: Control vs. hac1 deletion mutant in exponential growth
Ontology highlight
ABSTRACT:
ORGANISM(S): Ogataea angusta
SUBMITTER: Hye Yun Moon
PROVIDER: E-GEOD-67084 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
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Project description:Transcriptional profiling of Control and hac1 deletion mutant in ER stress condition on P. angusta DL1 strain. WT+ER stress vs. hac1 deletion mutant+ER stress. Six-condition experiment: Control+ER stress (TM 30, 60, 120min; DTT 30, 60, 120min) vs. hac1 deletion mutant+ER stress condition (TM 30, 60, 120min; DTT 30, 60, 120min) in P. angusta DL1 strain. Independently grown and harvested. Dye-swapping.
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Project description:Binding of in vitro synthesized HAC1 mRNA was studied using protein microarray. 3 replicates, plus 3 reverse dye replicates An all pairs experiment design type is where all labeled extracts are compared to every other labeled extract. is_reverse: no: HAC1 mRNA Cy5 labeled; yes: HAC1 mRNA Cy3 labeled
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Project description:ABSTRACT: Inorganic arsenic is a carcinogen and its ingestion in foods such as rice presents a significant risk to human health. Plants chemically reduce arsenate to arsenite. Using genome-wide association (GWA) mapping of loci controlling natural variation in arsenic accumulation in Arabidopsis thaliana allowed us to identify the arsenate reductase required for this reduction, which we named High Arsenic Content1 (HAC1). Complementation verified the identity of HAC1, and expression in Escherichia coli lacking a functional arsenate reductase confirmed the arsenate reductase activity of HAC1. The HAC1 protein accumulates in the epidermis, the outer cell layer of the root, and also in the pericycle cells surrounding the central vascular tissue. Plants lacking HAC1 lose their ability to efflux arsenite from roots, leading to both increased transport of arsenic into the central vascular tissue and on into the shoot. HAC1 therefore functions to reduce arsenate to arsenite in the outer cell layer of the root, facilitating efflux of arsenic as arsenite back into the soil to limit its accumulation in the root and transport to the shoot. Arsenate reduction by HAC1 in the pericycle may play a role in limiting arsenic loading into the xylem. Loss of HAC1 encoded arsenic reduction leads to a significant increase in arsenic accumulation in shoots causing an increased sensitivity to arsenate toxicity. We also confirmed the previous observation that the ACR2 arsenate reductase in A. thaliana plays no detectable role in arsenic metabolism. Further, ACR2 does not interact epistatically with HAC1, since arsenic metabolism in the acr2 hac1 double mutant is disrupted in an identical manner to that described for the hac1 single mutant. Our identification of HAC1 and its associated natural variation provides an important new resource for the development of low arsenic containing food stuffs such as rice.
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Project description:Binding of in vitro synthesized HAC1 mRNA was studied using protein microarray. 3 replicates, plus 3 reverse dye replicates An all pairs experiment design type is where all labeled extracts are compared to every other labeled extract. is_reverse: no: HAC1 mRNA Cy5 labeled; yes: HAC1 mRNA Cy3 labeled all_pairs
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