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A phosphodiesterase 2A isoform localized to mitochondria regulates respiration.

Title data

Acin-Perez, Rebeca ; Russwurm, Michael ; Günnewig, Kathrin ; Gertz, Melanie ; Zoidl, Georg ; Ramos, Lavoisier ; Buck, Jochen ; Levin, Lonny R. ; Rassow, Joachim ; Manfredi, Giovanni ; Steegborn, Clemens:
A phosphodiesterase 2A isoform localized to mitochondria regulates respiration.
In: The Journal of Biological Chemistry. Vol. 286 (2 September 2011) Issue 35 . - pp. 30423-30432.
ISSN 1083-351X
DOI: https://doi.org/10.1074/jbc.M111.266379

Abstract in another language

Mitochondria are central organelles in cellular energy metabolism, apoptosis, and aging processes. A signaling network regulating these functions was recently shown to include soluble adenylyl cyclase as a local source of the second messenger cAMP in the mitochondrial matrix. However, a mitochondrial cAMP-degrading phosphodiesterase (PDE) necessary for switching off this cAMP signal has not yet been identified. Here, we describe the identification and characterization of a PDE2A isoform in mitochondria from rodent liver and brain. We find that mitochondrial PDE2A is located in the matrix and that the unique N terminus of PDE2A isoform 2 specifically leads to mitochondrial localization of this isoform. Functional assays show that mitochondrial PDE2A forms a local signaling system with soluble adenylyl cyclase in the matrix, which regulates the activity of the respiratory chain. Our findings complete a cAMP signaling cascade in mitochondria and have implications for understanding the regulation of mitochondrial processes and for their pharmacological modulation.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PubMed-ID: 9932481
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Biochemistry > Chair Biochemistry - Univ.-Prof. Dr. Clemens Steegborn
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Biochemistry
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 17 Apr 2015 09:27
Last Modified: 17 Apr 2015 09:27
URI: https://eref.uni-bayreuth.de/id/eprint/10378