Oxygen Deficiency Responsive Gene Expression inChlamydomonas reinhardtii through a Copper-Sensing Signal Transduction Pathway. Quinn, J. M., Eriksson, M., Moseley, J. L., & Merchant, S. Plant Physiology, 128(2):463–471, February, 2002. ![Oxygen Deficiency Responsive Gene Expression inChlamydomonas reinhardtii through a Copper-Sensing Signal Transduction Pathway [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Chlamydomonas reinhardtii activatesCpx1, Cyc6, and Crd1, encoding, respectively, coproporphyrinogen oxidase, cytochromec 6, and a novel di-iron enzyme when transferred to oxygen-deficient growth conditions. This response is physiologically relevant because C. reinhardtiiexperiences these growth conditions routinely, and furthermore, one of the target genes, Crd1, is functionally required for normal growth under oxygen-depleted conditions. The same genes are activated also in response to copper-deficiency through copper-response elements that function as target sites for a transcriptional activator. The core of the copper-response element, GTAC, is required also for the hypoxic response, as is a trans-acting locus, CRR1. Mercuric ions, which antagonize the copper-deficiency response, also antagonize the oxygen-deficiency response of these target genes. Taken together, these observations suggest that the oxygen- and copper-deficiency responses share signal transduction components. Nevertheless, whereas the copper-response element is sufficient for the nutritional copper response, the oxygen-deficiency response requires, in addition, a second cis-element, indicating that the response to oxygen depletion is not identical to the nutritional copper response. The distinction between the two responses is also supported by comparative analysis of the response of the target genes,Cyc6, Cpx1, and Crd1, to copper versus oxygen deficiency. A Crr1-independent pathway forHyd1 expression in oxygen-depleted C. reinhardtii demonstrates the existence of multiple oxygen/redox-responsive circuits in this model organism.
@article{quinn_oxygen_2002,
title = {Oxygen {Deficiency} {Responsive} {Gene} {Expression} {inChlamydomonas} reinhardtii through a {Copper}-{Sensing} {Signal} {Transduction} {Pathway}},
volume = {128},
issn = {0032-0889},
url = {https://doi.org/10.1104/pp.010694},
doi = {10/cp86k3},
abstract = {Chlamydomonas reinhardtii activatesCpx1, Cyc6, and Crd1, encoding, respectively, coproporphyrinogen oxidase, cytochromec 6, and a novel di-iron enzyme when transferred to oxygen-deficient growth conditions. This response is physiologically relevant because C. reinhardtiiexperiences these growth conditions routinely, and furthermore, one of the target genes, Crd1, is functionally required for normal growth under oxygen-depleted conditions. The same genes are activated also in response to copper-deficiency through copper-response elements that function as target sites for a transcriptional activator. The core of the copper-response element, GTAC, is required also for the hypoxic response, as is a trans-acting locus, CRR1. Mercuric ions, which antagonize the copper-deficiency response, also antagonize the oxygen-deficiency response of these target genes. Taken together, these observations suggest that the oxygen- and copper-deficiency responses share signal transduction components. Nevertheless, whereas the copper-response element is sufficient for the nutritional copper response, the oxygen-deficiency response requires, in addition, a second cis-element, indicating that the response to oxygen depletion is not identical to the nutritional copper response. The distinction between the two responses is also supported by comparative analysis of the response of the target genes,Cyc6, Cpx1, and Crd1, to copper versus oxygen deficiency. A Crr1-independent pathway forHyd1 expression in oxygen-depleted C. reinhardtii demonstrates the existence of multiple oxygen/redox-responsive circuits in this model organism.},
number = {2},
urldate = {2021-10-19},
journal = {Plant Physiology},
author = {Quinn, Jeanette M. and Eriksson, Mats and Moseley, Jeffrey L. and Merchant, Sabeeha},
month = feb,
year = {2002},
pages = {463--471},
}
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This response is physiologically relevant because C. reinhardtiiexperiences these growth conditions routinely, and furthermore, one of the target genes, Crd1, is functionally required for normal growth under oxygen-depleted conditions. The same genes are activated also in response to copper-deficiency through copper-response elements that function as target sites for a transcriptional activator. The core of the copper-response element, GTAC, is required also for the hypoxic response, as is a trans-acting locus, CRR1. Mercuric ions, which antagonize the copper-deficiency response, also antagonize the oxygen-deficiency response of these target genes. Taken together, these observations suggest that the oxygen- and copper-deficiency responses share signal transduction components. Nevertheless, whereas the copper-response element is sufficient for the nutritional copper response, the oxygen-deficiency response requires, in addition, a second cis-element, indicating that the response to oxygen depletion is not identical to the nutritional copper response. The distinction between the two responses is also supported by comparative analysis of the response of the target genes,Cyc6, Cpx1, and Crd1, to copper versus oxygen deficiency. 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This response is physiologically relevant because C. reinhardtiiexperiences these growth conditions routinely, and furthermore, one of the target genes, Crd1, is functionally required for normal growth under oxygen-depleted conditions. The same genes are activated also in response to copper-deficiency through copper-response elements that function as target sites for a transcriptional activator. The core of the copper-response element, GTAC, is required also for the hypoxic response, as is a trans-acting locus, CRR1. Mercuric ions, which antagonize the copper-deficiency response, also antagonize the oxygen-deficiency response of these target genes. Taken together, these observations suggest that the oxygen- and copper-deficiency responses share signal transduction components. 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