Lesson plan
Fastk
Fas-activated serine/threonine kinase is an enzyme that in humans is encoded by the FASTK gene. The protein encoded by this gene is a member of the serine/threonine protein kinase family. This kinase was shown to be activated rapidly during Fas-mediated apoptosis in Jurkat cells. In response to Fas receptor ligation, it phosphorylates the apoptosis-promoting nuclear RNA-binding protein TIA1. The encoded protein is a strong inducer of lymphocyte apoptosis. Two transcript variants encoding different isoforms have been found for this gene. The longer one is located in the cell nucleus and cytoplasm, and the shorter one is 34 amino acids at the N-terminus, which is transported to the mitochondrion. The mitochondrial FASTK isoform localizes in the mitochondrial granules, where it interacts with the GRSF1 protein and binds to mt-mRNA ND6, the template of the only protein encoded on the light strand of the mitochondrial genome. In the case of FASTK deletion, it was observed loss of ND6 mt-mRNA and a 50-60% decrease in the activity of complex I of the respiratory chain. However, overexpression of this protein resulted in the stabilization of ND6 mt-mRNA Other variants exist, but their full-length natures have not yet been determined.
Article summary
Fas-activated serine/threonine kinase is an enzyme that in humans is encoded by the FASTK gene. The protein encoded by this gene is a member of the serine/threonine protein kinase family. This kinase was shown to be activated rapidly during Fas-mediated apoptosis in Jurkat cells. In response to Fas receptor ligation, it phosphorylates the apoptosis-promoting nuclear RNA-binding protein TIA1. The encoded protein is a strong inducer of lymphocyte apoptosis. Two transcript variants encoding different isoforms have been found for this gene. The longer one is located in the cell nucleus and cytoplasm, and the shorter one is 34 amino acids at the N-terminus, which is transported to the mitochondrion. The mitochondrial FASTK isoform localizes in the mitochondrial granules, where it interacts with the GRSF1 protein and binds to mt-mRNA ND6, the template of the only protein encoded on the light strand of the mitochondrial genome. In the case of FASTK deletion, it was observed loss of ND6 mt-mRNA and a 50-60% decrease in the activity of complex I of the respiratory chain. However, overexpression of this protein resulted in the stabilization of ND6 mt-mRNA Other variants exist, but their full-length natures have not yet been determined.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.