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Asymmetric localization of PCP proteins

Reactome ID: R-HSA-4608870

中文名称

PCP 蛋白的不对称定位

通路描述

平面细胞极性(PCP)通路的一个显著特征是单个细胞上相反膜上蛋白质的不对称分布。在果蝇中,Stbm 和 Pk(与人类 VANGL1/2 和 PRICKLE1/2/3 同源物)与 Fz、Dsh 和 Dgo(FZD、DVL 和 ANKRD6)在相反侧共定位。这两个复合物相互拮抗,其中 Fz:Dsh:Dgo 促进 Dsh 下游的信号转导,而 Stbm:Pk 复合物限制这种信号转导(综述 Seifert 和 Mlodzik,2007)。PCP 蛋白的不对称定位在脊椎动物中也观察到(Montcouquiol 等人,2003, 2006;Wang 等人,2006;Narimatsu 等人,2009),尽管其定位模式与果蝇不同。关于定位如何建立以及不对称分布如何转化为宏观形态过程的细节仍未完全阐明。
英文描述
Asymmetric localization of PCP proteins One of the hallmarks of the Planar Cell Polarity pathway is the asymmetric distribution of proteins on opposite membranes of a single cell. In Drosophila, Stbm and Pk (homologues to the human VANGL1/2 and PRICKLE1/2/3) colocalize opposite Fz, Dsh and Dgo (FZD, DVL, and ANKRD6, respectively). The two complexes antagonize each other, with Fz:Dsh:Dgo acting to promote signaling downstream of Dsh, while the Stbm:Pk complex restricts this signaling (reviewed in Seifert and Mlodzik, 2007). Asymmetric localization of some PCP proteins is also seen in vertebrates (Montcouquiol et al, 2003, 2006; Wang et al, 2006, Narimatsu et al, 2009) although the patterns of localization differ from that of flies. The details of how localization is established and how the asymmetrical distribution of proteins is translated into gross morphological processes remain to be fully elucidated.

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