The Arabidopsis thaliana homolog of yeast BRE1 has a function in cell cycle regulation during early leaf and root growth

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dc.contributor.authorFleury, D.
dc.contributor.authorHimanen, K.
dc.contributor.authorCnops, G.
dc.contributor.authorNelissen, H.
dc.contributor.authorBoccardi, T.
dc.contributor.authorMaere, S.
dc.contributor.authorBeemster, G.
dc.contributor.authorNeyt, P.
dc.contributor.authorAnami, S.
dc.contributor.authorRobels, P.
dc.contributor.authorMicol, J.
dc.contributor.authorInze, D.
dc.contributor.authorVan Lijsebettens, M.
dc.contributor.organisationAustralian Centre for Plant Functional Genomics (ACPFG)
dc.date.issued2007
dc.description.abstractChromatin modification and transcriptional activation are novel roles for E3 ubiquitin ligase proteins that have been mainly associated with ubiquitin-dependent proteolysis. We identified HISTONE MONOUBIQUITINATION1 (HUB1) (and its homolog HUB2) in Arabidopsis thaliana as RING E3 ligase proteins with a function in organ growth. We show that HUB1 is a functional homolog of the human and yeast BRE1 proteins because it monoubiquitinated histone H2B in an in vitro assay. Hub knockdown mutants had pale leaf coloration, modified leaf shape, reduced rosette biomass, and inhibited primary root growth. One of the alleles had been designated previously as ang4-1. Kinematic analysis of leaf and root growth together with flow cytometry revealed defects in cell cycle activities. The hub1-1 (ang4-1) mutation increased cell cycle duration in young leaves and caused an early entry into the endocycles. Transcript profiling of shoot apical tissues of hub1-1 (ang4-1) indicated that key regulators of the G2-to-M transition were misexpressed. Based on the mutant characterization, we postulate that HUB1 mediates gene activation and cell cycle regulation probably through chromatin modifications.
dc.identifier.citationThe Plant Cell, 2007; 19(2):417-432
dc.identifier.doi10.1105/tpc.106.041319
dc.identifier.issn1040-4651
dc.identifier.issn1532-298X
dc.identifier.orcidFleury, D. [0000-0002-7077-4103]
dc.identifier.urihttp://hdl.handle.net/2440/44814
dc.language.isoen
dc.publisherAmer Soc Plant Physiologists
dc.source.urihttps://doi.org/10.1105/tpc.106.041319
dc.subjectHumans
dc.subjectArabidopsis
dc.subjectPlant Leaves
dc.subjectPlant Roots
dc.subjectLigases
dc.subjectUbiquitin-Protein Ligase Complexes
dc.subjectUbiquitin-Protein Ligases
dc.subjectSaccharomyces cerevisiae Proteins
dc.subjectArabidopsis Proteins
dc.subjectUbiquitin
dc.subjectOligonucleotide Array Sequence Analysis
dc.subjectGene Expression Profiling
dc.subjectCell Cycle
dc.subjectCell Proliferation
dc.subjectGene Expression Regulation, Plant
dc.subjectPhenotype
dc.subjectMolecular Sequence Data
dc.subjectTranscriptional Activation
dc.titleThe Arabidopsis thaliana homolog of yeast BRE1 has a function in cell cycle regulation during early leaf and root growth
dc.typeJournal article
pubs.publication-statusPublished

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