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Structural and molecular basis of the assembly of the TRPP2/PKD1 complex

Open access
Yu, Yong, Ulbrich, Maximilian H., Li, Ming-Hui, Buraei, Zafir, Chen, Xing-Zhen, Ong, Albert C. M., Tong, Liang, Isacoff, Ehud Y., Yang, Jian·2009·Proceedings of the National Academy of Sciences

Abstract

Mutations in PKD1 and TRPP2 account for nearly all cases of autosomal dominant polycystic kidney disease (ADPKD). These 2 proteins form a receptor/ion channel complex on the cell surface. Using a combination of biochemistry, crystallography, and a single-molecule method to determine the subunit composition of proteins in the plasma membrane of live cells, we find that this complex contains 3 TRPP2 and 1 PKD1. A newly identified coiled-coil domain in the C terminus of TRPP2 is critical for the formation of this complex. This coiled-coil domain forms a homotrimer, in both solution and crystal structure, and binds to a single coiled-coil domain in the C terminus of PKD1. Mutations that disrupt the TRPP2 coiled-coil domain trimer abolish the assembly of both the full-length TRPP2 trimer and the TRPP2/PKD1 complex and diminish the surface expression of both proteins. These results have significant implications for the assembly, regulation, and function of the TRPP2/PKD1 complex and the pathogenic mechanism of some ADPKD-producing mutations.

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Metadata

Authors
Yu, Y., Ulbrich, M. H., Li, M.-H., Buraei, Z., Chen, X.-Z., Ong, A. C. M., Tong, L., Isacoff, E. Y., & Yang, J.
Venue
Proceedings of the National Academy of Sciences
Published
2009-07-14
Volume
106
Issue
28
Pages
11558-11563
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1990405382
Cited by
178
References
3
FWCI
9.09
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Structural and molecular basis of the assembly of the TRPP2/PKD1 complex. https://app.cochat.ai/papers/10.1073/pnas.0903684106
The paper
Yu, Y., Ulbrich, M. H., Li, M.-H., Buraei, Z., Chen, X.-Z., Ong, A. C. M., Tong, L., Isacoff, E. Y., & Yang, J. (2009). Structural and molecular basis of the assembly of the TRPP2/PKD1 complex. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0903684106

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