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

Mengsheng Gao (UGent) , Kristiina Himanen (UGent) , Gerda Cnops (UGent) , Hilde Nelissen (UGent) , Tommaso Matteo Boccardi (UGent) , Steven Maere (UGent) , Gerrit Beemster (UGent) , Pia Neyt (UGent) , Sylvester Anami (UGent) , Pedro Robles, et al.
(2007) PLANT CELL. 19(2). p.417-432
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Abstract
Chromatin 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.
Keywords
GENE-EXPRESSION, ORGAN GROWTH, MUTANTS IDENTIFY, PLANT DEVELOPMENT, MEDIATED TRANSFORMATION, HISTONE H2B MONOUBIQUITINATION, RNA-POLYMERASE-II, SIZE CONTROL, UBIQUITIN, PROTEIN

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Chicago
Gao, Mengsheng, Kristiina Himanen, Gerda Cnops, Hilde Nelissen, Tommaso Matteo Boccardi, Steven Maere, Gerrit Beemster, et al. 2007. “The Arabidopsis Thaliana Homolog of Yeast BRE1 Has a Function in Cell Cycle Regulation During Early Leaf and Root Growth.” Plant Cell 19 (2): 417–432.
APA
Gao, Mengsheng, Himanen, K., Cnops, G., Nelissen, H., Boccardi, T. M., Maere, S., Beemster, G., et al. (2007). The Arabidopsis thaliana homolog of yeast BRE1 has a function in cell cycle regulation during early leaf and root growth. PLANT CELL, 19(2), 417–432.
Vancouver
1.
Gao M, Himanen K, Cnops G, Nelissen H, Boccardi TM, Maere S, et al. The Arabidopsis thaliana homolog of yeast BRE1 has a function in cell cycle regulation during early leaf and root growth. PLANT CELL. 2007;19(2):417–32.
MLA
Gao, Mengsheng, Kristiina Himanen, Gerda Cnops, et al. “The Arabidopsis Thaliana Homolog of Yeast BRE1 Has a Function in Cell Cycle Regulation During Early Leaf and Root Growth.” PLANT CELL 19.2 (2007): 417–432. Print.
@article{413828,
  abstract     = {Chromatin 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.},
  author       = {Gao, Mengsheng and Himanen, Kristiina and Cnops, Gerda and Nelissen, Hilde and Boccardi, Tommaso Matteo and Maere, Steven and Beemster, Gerrit and Neyt, Pia and Anami, Sylvester and Robles, Pedro and Micol, Jos{\'e} Luis and Inz{\'e}, Dirk and Van Lijsebettens, Maria},
  issn         = {1040-4651},
  journal      = {PLANT CELL},
  keyword      = {GENE-EXPRESSION,ORGAN GROWTH,MUTANTS IDENTIFY,PLANT DEVELOPMENT,MEDIATED TRANSFORMATION,HISTONE H2B MONOUBIQUITINATION,RNA-POLYMERASE-II,SIZE CONTROL,UBIQUITIN,PROTEIN},
  language     = {eng},
  number       = {2},
  pages        = {417--432},
  title        = {The Arabidopsis thaliana homolog of yeast BRE1 has a function in cell cycle regulation during early leaf and root growth},
  url          = {http://dx.doi.org/10.1105/tpc.106.041319},
  volume       = {19},
  year         = {2007},
}

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