Proteomic profiling of tandem affinity purified 14-3-3 protein complexes in Arabidopsis thaliana.
Proteomic profiling of tandem affinity purified 14-3-3 protein complexes in Arabidopsis thaliana.
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拟南芥中串联亲和纯化的 14-3-3 蛋白复合物的蛋白质组学分析。
DOI:
10.1002/pmic.200800445
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发表时间:
2009-06
期刊:
影响因子:
3.4
通讯作者:
Harper, Jeffrey F.
中科院分区:
文献类型:
--
作者:
Chang, Ing-Feng;Curran, Amy;Woolsey, Rebekah;Quilici, David;Cushman, John C.;Mittler, Ron;Harmon, Alice;Harper, Jeffrey F.
In eukaryotes, 14-3-3 dimers regulate hundreds of functionally diverse proteins (clients), typically in phosphorylation-dependent interactions. To uncover new clients, a 14-3-3 omega (At1g78300) from Arabidopsis was engineered with a “tandem affinity purification” (TAP) tag and expressed in transgenic plants. Purified complexes were analyzed by tandem mass spectrometry. Results indicate that 14-3-3 omega can dimerize with at least 10 of the 12 14-3-3 isoforms expressed in Arabidopsis. The identification here of 121 putative clients provides support for in vivo 14-3-3 interactions with a diverse array of proteins, including those involved in: (1) Ion transport, such as a K+ channel (GORK), a Cl− channel (CLCg), Ca2+ channels belonging to the glutamate receptor family (GLRs 1.2, 2.1, 2.9, 3.4, 3.7); (2) hormone signaling, such as ACC synthase (isoforms ACS-6, 7 and 8 involved in ethylene synthesis) and the brassinolide receptors BRI1 and BAK1; (3) transcription, such as 7 WRKY family transcription factors; (4) metabolism, such as phosphoenol pyruvate (PEP) carboxylase; and (5) lipid signaling, such as phospholipase D (β, and γ). More than 80% (101) of these putative clients represent previously unidentified 14-3-3 interactors. These results raise the number of putative 14-3-3 clients identified in plants to over 300.
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