Identification of a Novel SBP1-Containing SCFSFB Complex in Wild Dwarf Almond (Prunus tenella)
文献类型： 外文期刊
作者： Zeng, Bin 1 ; Wang, Jianyou 3 ; Hao, Qing 4 ; Yu, Zhenfan 1 ; Abudukayoumu, Ayimaiti 1 ; Tang, Yilian 1 ; Zhang, Xiang 1 ;
作者机构： 1.Xinjiang Agr Univ, Coll Forestry & Hort, Urumqi, Peoples R China
2.Sub Branch Natl Melon & Fruit Improvement Ctr, Dept Crop Genet & Breeding, Urumqi, Peoples R China
3.China Acad Forestry Sci, Dept Hort Crops, Xinjiang Branch, Urumqi, Peoples R China
4.Xinjiang Acad Agr Sci, Inst Hort Crops, Urumqi, Peoples R China
关键词： dwarf almond; SBP1; SCF (SKP1-Cullin1-F-box-Rbx1) complex; self-incompatibility; Prunus
期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.599； 五年影响因子：4.888 ）
ISSN：
年卷期： 2019 年 10 卷
页码：
收录情况： SCI
摘要： S-RNase-based gametophytic self-incompatibility (SI), in which specificities of pistil and pollen are determined by S-RNase and the S locus F-box protein, respectively, has been discovered in the Solanaceae, Plantaginaceae, and Rosaceae families, but some underlying molecular mechanisms remain elusive and controversial. Previous studies discovered SI in wild dwarf almond (Prunus tenella), and pistil S (S-RNase) and pollen S (SFB) determinant genes have been investigated. However, the SCF (SKP1-Cullin1-F-box-Rbx1) complex, which serves as an E3 ubiquitin ligase on non-self S-RNase, has not been investigated. In the current study, PetSSK1 (SLF-interacting-SKP1-like1), SBP1 (S-RNase binding protein 1), CUL1, and SFB genes (S-haplotype-specific F-box) were identified in an accession (ZB1) of P. tenella. Yeast two-hybrid assays revealed interactions between PetSBP1 and PetCUL1 and between PetSBP1 and PetSFBs (SFB16 and SFB17), and subsequent pull-down assays confirmed these interactions, suggesting a novel SBP1-containing SCFSFB complex in wild dwarf almond. Moreover, despite a putative interaction between PetSSK1 and PetCUL1, we revealed that PetSSK1 does not interact with PetSFB16 or PetSFB17, and thus the canonical SSK1-containing SCFSFB complex could not be identified. This suggests a novel molecular mechanism of gametophytic SI in Prunus species.
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