Association of the testis-specific TRIM/RBCC protein RNF33/TRIM60 with the cytoplasmic motor proteins KIF3A and KIF3B

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题名:	Association of the testis-specific TRIM/RBCC protein RNF33/TRIM60 with the cytoplasmic motor proteins KIF3A and KIF3B
作者:	Huang, CJ (Huang, Chiu-Jung) Huang, CC (Huang, Chih-Cheng) Chang, CC (Chang, Chih-Chun)
贡献者:	Dept Anim Sci
关键词:	RNF33/TRIM60 TRIM/RBCC KIF3A KIF3B Spermatogenesis
日期:	2012-01
上传时间:	2013-02-26 13:33:27 (UTC+8)
摘要:	The Rnf33/Trim60 gene is temporally transcribed in the preimplantation embryo before being silenced at the blastocyst stage but Rnf33 expression is detected in adult testis of the mouse. The putative RNF33 protein is a tripartite motif (TRIM)/RBCC protein composed of a typical RING zinc finger, a B-box 2, two alpha-helical coiled-coil segments, and a B30.2 domain. As a first step towards the elucidation of the biologic function of RNF33, we aimed in this study to elucidate proteins that associate with RNF33. RNF33-interacting proteins were first derived by the yeast two-hybrid system followed by co-immunoprecipitation assays. Interacting domains were determined by deletion mapping in genetic and biochemical analyzes. RNF33 was shown to interact with the kinesin-2 family members 3A (KIF3A) and 3B (KIF3B) motor proteins in the heterodimeric form known to transport cargos along the microtubule. Domain mapping showed that the RB and B30.2 domains of RNF33 interacted with the respective carboxyl non-motor domains of KIF3A and KIF3B. Since RNF33 interacted with the carboxyl-terminal tail of the KIF3A-KIF3B heterodimer, the motor head section of KIF3A-KIF3B was free and available for association with designated cargo(s) and movement along the microtubule. Data also suggest that RNF33 most likely interacted with KIF3A-KIF3B independent of the adaptor kinesin-associated protein KAP3. This study is a first demonstration of a TRIM protein, namely RNF33, that interacts with the kinesin molecular motors possibly contributing to kinesin-dependent mobilization of specific cargo(s) along the microtubule in the testis of the mouse.
關聯:	MOLECULAR AND CELLULAR BIOCHEMISTRY 卷: 360 期: 1-2 頁數: 121-131
显示于类别:	[動物科學系 ] 期刊論文

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