Reference: Kakihara Y and Houry WA (2012) The R2TP complex: discovery and functions. Biochim Biophys Acta 1823(1):101-7

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Abstract


The two closely related AAA+family ATPases Rvb1 and Rvb2 are part of several critical multiprotein complexes, and, thus, are involved in a wide range of cellular processes including chromatin remodelling, telomerase assembly, and snoRNP biogenesis. It was found that Rvb1 and Rvb2 form a tight functional complex with Pih1 (Protein interacting with Hsp90) and Tah1 (TPR-containing protein associated with Hsp90), which are two Hsp90 interactors. We named the complex R2TP. The complex was originally isolated from Saccharomyces cerevisiae and was, subsequently, identified in mammalian cells. R2TP was found to be required for box C/D snoRNP biogenesis in yeast and mammalian cells. More recently, several studies revealed that the complex is also involved in multiple biological processes including apoptosis, phosphatidylinositol-3 kinase-related protein kinase (PIKK) signalling, and RNA polymerase II assembly. In this review, we describe the discovery of the complex and discuss the emerging critical roles that R2TP plays in distinct cellular processes.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't | Review
Authors
Kakihara Y, Houry WA
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