The atypical cadherin fat directly regulates mitochondrial function and metabolic state.

Sing, Anson; Tsatskis, Yonit; Fabian, Lacramioara; Hester, Ian; Rosenfeld, Robyn; Serricchio, Mauro; Yau, Norman; Bietenhader, Maïlis; Shanbhag, Riya; Jurisicova, Andrea; Brill, Julie A; McQuibban, G Angus; McNeill, Helen (2014). The atypical cadherin fat directly regulates mitochondrial function and metabolic state. Cell, 158(6), pp. 1293-1308. Cell Press 10.1016/j.cell.2014.07.036

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Fat (Ft) cadherins are enormous cell adhesion molecules that function at the cell surface to regulate the tumor-suppressive Hippo signaling pathway and planar cell polarity (PCP) tissue organization. Mutations in Ft cadherins are found in a variety of tumors, and it is presumed that this is due to defects in either Hippo signaling or PCP. Here, we show Drosophila Ft functions in mitochondria to directly regulate mitochondrial electron transport chain integrity and promote oxidative phosphorylation. Proteolytic cleavage releases a soluble 68 kDa fragment (Ft(mito)) that is imported into mitochondria. Ft(mito) binds directly to NADH dehydrogenase ubiquinone flavoprotein 2 (Ndufv2), a core component of complex I, stabilizing the holoenzyme. Loss of Ft leads to loss of complex I activity, increases in reactive oxygen species, and a switch to aerobic glycolysis. Defects in mitochondrial activity in ft mutants are independent of Hippo and PCP signaling and are reminiscent of the Warburg effect.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Biochemistry and Molecular Medicine

UniBE Contributor:

Serricchio, Mauro

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0092-8674

Publisher:

Cell Press

Language:

English

Submitter:

Mauro Serricchio

Date Deposited:

18 Nov 2019 12:43

Last Modified:

05 Dec 2022 15:32

Publisher DOI:

10.1016/j.cell.2014.07.036

PubMed ID:

25215488

BORIS DOI:

10.7892/boris.135042

URI:

https://boris.unibe.ch/id/eprint/135042

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