National Natural Science Foundation of China (NSFC)
中国
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: A mutual co-recognition mechanism ensures the proper assembly of heterotrimeric kinesin-2 for intraflagellar transport. 著者: Jinqi Ren / Lingyan Zhao / Guanghan Chen / Guangshuo Ou / Wei Feng / 要旨: Heterotrimeric kinesin-2, composed of two distinct kinesin motors and a kinesin-associated protein (KAP), is essential for intraflagellar transport and ciliogenesis. KAP specifically recognizes the ...Heterotrimeric kinesin-2, composed of two distinct kinesin motors and a kinesin-associated protein (KAP), is essential for intraflagellar transport and ciliogenesis. KAP specifically recognizes the hetero-paired motor tails for the holoenzyme assembly, but the underlying mechanism remains unclear. Here, we determine the structure of KAP-1 in complex with the hetero-paired tails from kinesin-2 motors KLP-20 and KLP-11. KAP-1 forms an elongated superhelical structure characterized by a central groove and a C-terminal helical (CTH)-hook. The two motor tails fold together and are co-recognized by the central groove of KAP-1. The adjacent hetero-pairing trigger sequences preceding the two tails form an intertwined heterodimer, which co-captures the CTH-hook of KAP-1 to complete the holoenzyme assembly. Mutations in the interfaces between KAP-1 and the two tails disrupt the heterotrimeric kinesin-2 complex and impair kinesin-2-mediated intraflagellar transport. Thus, KAP-1 and the hetero-paired motors are mutually co-recognized, ensuring the proper assembly of heterotrimeric kinesin-2 for cargo transport.
全体 : Ternary complex of the Caenorhabditis elegans KAP-1 in complex wi...
全体
名称: Ternary complex of the Caenorhabditis elegans KAP-1 in complex with two hetero-paired tails from kinesin-2 KLP-20 and KLP-11
要素
複合体: Ternary complex of the Caenorhabditis elegans KAP-1 in complex with two hetero-paired tails from kinesin-2 KLP-20 and KLP-11
タンパク質・ペプチド: Kinesin-associated protein KAP-1
タンパク質・ペプチド: Kinesin-like protein KLP-20
タンパク質・ペプチド: Kinesin-like protein KLP-11
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超分子 #1: Ternary complex of the Caenorhabditis elegans KAP-1 in complex wi...
超分子
名称: Ternary complex of the Caenorhabditis elegans KAP-1 in complex with two hetero-paired tails from kinesin-2 KLP-20 and KLP-11 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all