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Functionally redundant protein phosphatase genes PTP2 and MSG5 co-regulate the calcium signaling pathway in Saccharomyces cerevisiae upon exposure to high extracellular calcium concentration

Paper ID Volume ID Publish Year Pages File Format Full-Text
20826 43193 2013 9 PDF Available
Title
Functionally redundant protein phosphatase genes PTP2 and MSG5 co-regulate the calcium signaling pathway in Saccharomyces cerevisiae upon exposure to high extracellular calcium concentration
Abstract

Reversible phosphorylation is one of the key post-translational modifications for the regulation of many essential cellular processes. We have previously reported that the disruption of two protein phosphatase (PPase) genes, PTP2 and MSG5, causes calcium sensitivity indicating that functional redundancy exists between the two PPases in response to high extracellular calcium. In this paper, we found that the inactivation of calcineurin by the disruption of the calcineurin regulatory subunit, CNB1 or treatment with a calcineurin inhibitor, FK506, can suppress the calcium-sensitive phenotype of the ptp2Δmsg5Δ double disruptant. In the wake of a calcium-induced, calcineurin-driven signaling pathway activation, the calcium sensitivity of the ptp2Δmsg5Δ double disruptant can be suppressed by regulating the SLT2 pathway through the disruption of the major kinases in the SLT2 signal cascade that include BCK1, MKK1 and SLT2. Also, we show that PTP2 and MSG5 are key regulatory PPases that prevent over-activation of the calcium-induced signaling cascade under the parallel control of the SLT2 and calcineurin pathways.

Keywords
Saccharomyces cerevisiae; PTP2; MSG5; Calcium sensitivity; Stress response
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Functionally redundant protein phosphatase genes PTP2 and MSG5 co-regulate the calcium signaling pathway in Saccharomyces cerevisiae upon exposure to high extracellular calcium concentration
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 115, Issue 2, February 2013, Pages 138–146
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us