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Title 

CRIF1 is essential for the synthesis and insertion of oxidative phosphorylation polypeptides in the mammalian mitochondrial membrane

Authors 

S J KimM C KwonM J RyuH K ChungS TadiY K KimJ M KimS H LeeJ H ParkG R KweonS W RyuY S JoChul Ho LeeH KatakeyamaY GotoY H YimJ ChungY Y KongM Shong

Publisher 

Elsevier (Cell Press)

Issue Date 

2012

Citation 

Cell Metabolism, vol. 16, no. 2, pp. 274-283

Abstract 

Although substantial progress has been made in understanding the mechanisms underlying the expression of mtDNA-encoded polypeptides, the regulatory factors involved in mitoribosome-mediated synthesis and simultaneous insertion of mitochondrial oxidative phosphorylation (OXPHOS) polypeptides into the inner membrane of mitochondria are still unclear. In the present study, disruption of the mouse Crif1 gene, which encodes a mitochondrial protein, resulted in a profound deficiency in OXPHOS caused by the disappearance of OXPHOS subunits and complexes in vivo. CRIF1 was associated with large mitoribosomal subunits that were located close to the polypeptide exit tunnel, and the elimination of CRIF1 led to both aberrant synthesis and defective insertion of mtDNA-encoded nascent OXPHOS polypeptides into the inner membrane. CRIF1 interacted with nascent OXPHOS polypeptides and molecular chaperones, e.g., Tid1. Taken together, these results suggest that CRIF1 plays a critical role in the integration of OXPHOS polypeptides into the mitochondrial membrane in mammals.

ISSN 

1550-4131

Link 

http://dx.doi.org/10.1016/j.cmet.2012.06.012

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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