Molecular architecture of a cylindrical self-assembly at human centrosomes
Journal Article
·
· Nature Communications
- National Cancer Inst., Bethesda, MD (United States)
- Korea Basic Science Inst., Ochang (Korea)
- National Inst. of Health (NIH), Bethesda, MD (United States). National Inst. of Diabetes, Digestive and Kidney Diseases (NIDDK)
- Frederick National Lab. for Cancer Research, MD (United States)
- Korea Research Inst. of Bioscience and Biotechnology, Ochang (Republic of Korea)
The cell is constructed by higher-order structures and organelles through complex interactions among distinct structural constituents. The centrosome is a membraneless organelle composed of two microtubule-derived structures called centrioles and an amorphous mass of pericentriolar material. Super-resolution microscopic analyses in various organisms revealed that diverse pericentriolar material proteins are concentrically localized around a centriole in a highly organized manner. However, the molecular nature underlying these organizations remains unknown. Here we show that two human pericentriolar material scaffolds, Cep63 and Cep152, cooperatively generate a heterotetrameric α-helical bundle that functions in conjunction with its neighboring hydrophobic motifs to self-assemble into a higher-order cylindrical architecture capable of recruiting downstream components, including Plk4, a key regulator for centriole duplication. Mutations disrupting the self-assembly abrogate Plk4-mediated centriole duplication. Because pericentriolar material organization is evolutionarily conserved, this work may offer a paradigm for investigating the assembly and function of centrosomal scaffolds in various organisms.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- Eunice Kennedy Shriver National Institute for Child Health & Human Development (NICHD); National Cancer Institute (NCI); National Institute of Diabetes, Digestive and Kidney Diseases (NIDDK); National Research Council of Science and Technology (NST)
- OSTI ID:
- 1502246
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
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