Dataset Information

Search for the interactors of Arabidopsis thaliana myosin receptor MRF7

ABSTRACT: This project aims at identifying the binding partners of the Arabidopsis thaliana MRF7 protein and of its truncated form ΔMRF7, which lacks a potential protein binding domain DUF593 at the N-terminus. A.thaliana plants stably overexpressing GFP-MRF7 and GFP-ΔMRF7 were generated by ﬂoral dipping of Col-0 plants. Co-immunoprecipitation was carried out using the GFP-Trap®_A beads technology (Chromotek) and samples thus obtained were analysed through Liquid Chromatography-Mass Spectrometry

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Arabidopsis Thaliana (mouse-ear Cress)

TISSUE(S): Plant Cell, Root, Shoot

SUBMITTER: Chiara Perico

LAB HEAD: Imogen Sparkes

PROVIDER: PXD027155 | Pride | 2022-02-17

REPOSITORIES: Pride

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Publications

Arabidopsis thaliana myosin XIK is recruited to the Golgi through interaction with a MyoB receptor.

Perico Chiara C Gao Hongbo H Heesom Kate J KJ Botchway Stanley W SW Sparkes Imogen A IA

Communications biology 20211013 1

Plant cell organelles are highly mobile and their positioning play key roles in plant growth, development and responses to changing environmental conditions. Movement is acto-myosin dependent. Despite controlling the dynamics of several organelles, myosin and myosin receptors identified so far in Arabidopsis thaliana generally do not localise to the organelles whose movement they control, raising the issue of how specificity is determined. Here we show that a MyoB myosin receptor, MRF7, specific ...[more]

PMID: 34645991

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Project description:Neural basic helix-loop-helix (bHLH) transcription factors are important for the differentiation and cell type specification of neurons. They are thought to share direct downstream targets in their common role as neuronal differentiation factors, but have distinct targets with respect to their cell type specific roles. Little is known about distinct cell-type specific bHLH targets as previous work did not distinguish these from common targets. Based on previous genetic evidence, we hypothesize that bHLH transcription factors have unique targets for their function in regulating neuronal sub-type specification. Atoh1 (Math1) is a bHLH transcription factor that specifies different cell types of the proprioceptive pathway in mammals such as the dorsal interneuron 1 population of the developing neural tube. Using microarray analyses of neighboring specific bHLH sorted populations from developing mouse neural tubes, we determine transcripts unique to the Atoh1-derived population and not those common to bHLH transcription factors in related neural progenitor populations. Chromatin immunoprecipitation followed by sequencing (ChIP-seq) experiments of native tissue followed by enhancer reporter analyses identified five direct cell-type specific targets of Atoh1 in vivo: Klf7, Rab15, Rassf4, Selm, and Smad7, along with their Atoh1-responsive enhancers. These Atoh1 targets were found from native tissue in the appropriate developmental context and have diverse functions that range from transcription factors to regulators of endocytosis and signaling pathways. Only Rab15 and Selm are expressed across several different Atoh1-specified cell types including external granule cells (EGL) in the developing cerebellum, hair cells of the inner ear, and Merkel cells, demonstrating that even within Atoh1 lineages, not all Atoh1 specific targets are shared. Our work establishes on a molecular level that the neuronal differentiation bHLH transcription factors also have distinct targets for their roles in neuronal sub-type specification. From this work, we can begin to address how bHLH transcription factors are able to specify unique cell types and initiate programs that organize neuronal diversity. Gene expression analysis: Two samples, Atoh1-GFP and dNeurog1-GFP, were analyzed. Two biological replicates of each. Atoh1-GFP transgenics are mice with GFP inserted into a BAC that drives GFP to the Atoh1-derived population of the developing neural tube marking the dorsal interneuron 1 population (Raft et al. Development 2007). dNeurog1-GFP transgenics are mice with a Neurog1 enhancer that drives GFP to the dorsal part of the developing neural tube marking the dorsal interneuron 2 population (Nakada et al. Dev Bio 2004). Chip-seq analysis: Series GSE22111

			Action	DRS
	Col_0_WT_Repeat1.mgf	Mgf
	Col_0_WT_Repeat1.msf	Msf
	Col_0_WT_Repeat1.raw	Raw
	GFP_Delta_MRF7_Repeat1.mgf	Mgf
	GFP_Delta_MRF7_Repeat1.msf	Msf