D-AKAP1a is a signal-anchored protein in the mitochondrial outer membrane

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Abstract

Dual A-kinase anchoring protein 1a (D-AKAP1a, AKAP1) regulates cAMP signaling in mitochondria. However, it is not clear how D-AKAP1a is associated with mitochondria. In this study, we show that D-AKAP1a is a transmembrane protein in the mitochondrial outer membrane (MOM). We revealed that the N-terminus of D-AKAP1a is exposed to the intermembrane space of mitochondria and that its C-terminus is located on the cytoplasmic side of the MOM. Moderate hydrophobicity and the positively charged flanking residues of the transmembrane domain of D-AKAP1a were important for targeting. Taken together, D-AKAP1a can be classified as a signal-anchored protein in the MOM. Our topological study provides valuable information about the molecular and cellular mechanisms of mitochondrial targeting of AKAP1.

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CITATION STYLE

APA

Jun, Y. W., Park, H., Lee, Y. K., Kaang, B. K., Lee, J. A., & Jang, D. J. (2016). D-AKAP1a is a signal-anchored protein in the mitochondrial outer membrane. FEBS Letters, 590(7), 954–961. https://doi.org/10.1002/1873-3468.12123

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