ジャーナル: Nat Commun / 年: 2025 タイトル: Cryo-EM structure of native honey bee vitellogenin. 著者: Mateu Montserrat-Canals / Kilian Schnelle / Vilde Leipart / Øyvind Halskau / Gro V Amdam / Arne Moeller / Eva S Cunha / Hartmut Luecke / 要旨: Vitellogenin (Vg) is the main yolk precursor lipoprotein in almost all egg-laying animals. In addition, along its evolutionary history, Vg has developed a range of new functions in different taxa. In ...Vitellogenin (Vg) is the main yolk precursor lipoprotein in almost all egg-laying animals. In addition, along its evolutionary history, Vg has developed a range of new functions in different taxa. In the honey bee, Vg has functions related to immunity, antioxidant protection, social behavior and longevity. However, the molecular mechanisms underlying Vg functionalities are still poorly understood. Here, we report the cryo-EM structure of full-length honey bee Vg, one-step purified directly from hemolymph. The structure provides structural insights into the overall domain architecture, including the lipid binding cavity and the previously uncharacterized von Willebrand factor type D domain. A domain of unknown function has been identified as a C-terminal cystine knot domain based on structural homology. Information about post-translational modifications, cleavage products, metal and lipid binding allow an improved understanding of the mechanisms underlying the range of Vg functionalities. The findings have numerous implications for the structure-function relationship of vitellogenins of other species as well as members of the same protein superfamily, which share the same structural elements.
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分子量: 201305.797 Da / 分子数: 1 断片: The cleavage site for this sample is unclear as there are four possible cleavage sites at positions 1276, 1283, 1318 and 1321; hence the full-length protein sequence is listed. 由来タイプ: 天然 詳細: The cleavage site for this sample is unclear as there are four possible cleavage sites at positions 1276, 1283, 1318 and 1321; hence the full-length protein sequence is listed. 由来: (天然) Apis cerana (ニホンミツバチ) / 参照: UniProt: Q868N5