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    Structural mechanism of protein recognition by the FW domain of autophagy receptor Nbr1, Nat Commun, 25 Jun 2022

    發布時間:2022年06月25日

    Nature Communications, 25 June, 2022, DOI:https://doi.org/10.1038/s41467-022-31439-5

    Structural mechanism of protein recognition by the FW domain of autophagy receptor Nbr1

    Jianxiu Zhang, Ying-Ying Wang, Zhao-Qian Pan, Yulu Li, Jianhua Sui, Li-Lin Du & Keqiong Ye

    Abstract

    Neighbor of BRCA1 (Nbr1) is a conserved autophagy receptor that provides cargo selectivity to autophagy. The four-tryptophan (FW) domain is a signature domain of Nbr1, but its exact function remains unclear. Here, we show that Nbr1 from the filamentous fungus Chaetomium thermophilum uses its FW domain to bind the α-mannosidase Ams1, a cargo of selective autophagy in both budding yeast and fission yeast, and delivers Ams1 to the vacuole by conventional autophagy in heterologous fission yeast. The structure of the Ams1-FW complex was determined at 2.2 Å resolution by cryo-electron microscopy. The FW domain adopts an immunoglobulin-like β-sandwich structure and recognizes the quaternary structure of the Ams1 tetramer. Notably, the N-terminal di-glycine of Ams1 is specifically recognized by a conserved pocket of the FW domain. The FW domain becomes degenerated in fission yeast Nbr1, which binds Ams1 with a ZZ domain instead. Our findings illustrate the protein binding mode of the FW domain and reveal the versatility of Nbr1-mediated cargo recognition.

    文章鏈接:https://www.nature.com/articles/s41467-022-31439-5

    相關報道:http://www.salesdujour.com/kyjz/zxdt/202206/t20220627_6466470.html

     

     

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