| Literature DB >> 35649417 |
Xinxing Zhang1, Jinzhi Liu2, Tong Pan1, Alex Ward3, Jianfeng Liu4, X Z Shawn Xu5.
Abstract
Bardet-Biedl syndrome (BBS) is a genetic disorder that affects primary cilia. BBSome, a protein complex composed of eight BBS proteins, regulates the structure and function of cilia, and its malfunction causes BBS in humans. Here, we report a cilia-independent function of BBSome. To identify genes that regulate the C. elegans photoreceptor protein LITE-1 in ciliated ASH photosensory neurons, we performed a genetic screen and isolated bbs mutants. Functional analysis revealed that BBSome regulates LITE-1 protein stability independently of cilia. Through another round of genetic screening, we found that this cilia-independent function of BBSome is mediated by DLK-MAPK signaling, which acts downstream of BBSome to control LITE-1 stability via Rab5-mediated endocytosis. BBSome exerts its function by regulating the expression of DLK. BBSome also regulates the expression of LZK, a mammalian DLK in human cells. These studies identify a cilia-independent function of BBSome and uncover DLK as an evolutionarily conserved BBSome effector.Entities:
Keywords: BBSome; behavior; cilium; light; nematode; phototransduction; sensory; vision
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Year: 2022 PMID： 35649417 PMCID： PMC9233093 DOI： 10.1016/j.devcel.2022.05.005
Source DB: PubMed Journal: Dev Cell ISSN： 1534-5807 Impact factor: 13.417