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Gene Review

MYB33  -  myb domain protein 33

Arabidopsis thaliana

Synonyms: ATMYB33, K16F4.6, K16F4_6
 
 
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Disease relevance of ATMYB33/MYB33

  • However, myb33 myb65 sterility was conditional, where fertility increased both under higher light or lower temperature conditions [1].
  • In myb33 myb65 anthers, the tapetum undergoes hypertrophy at the pollen mother cell stage, resulting in premeiotic abortion of pollen development [1].
 

High impact information on ATMYB33/MYB33

  • Neither single mutant displayed a phenotype, implying that MYB33 and MYB65 are functionally redundant [1].
  • A microRNA target sequence is present in the MYB genes, and mutating this sequence in the MYB33:GUS fusion results in an expanded expression pattern, in tissues similar to that observed in the promoter-GUS lines, implying that the microRNA target sequence is restricting MYB33 expression [1].
  • Causality was suggested by the finding that, with GA treatment, plants flowered in short days, AtMYB33 expression increased at the shoot apex, and the petioles elongated and grew erect [2].

References

  1. The Arabidopsis GAMYB-like genes, MYB33 and MYB65, are microRNA-regulated genes that redundantly facilitate anther development. Millar, A.A., Gubler, F. Plant Cell (2005) [Pubmed]
  2. GAMYB-like genes, flowering, and gibberellin signaling in Arabidopsis. Gocal, G.F., Sheldon, C.C., Gubler, F., Moritz, T., Bagnall, D.J., MacMillan, C.P., Li, S.F., Parish, R.W., Dennis, E.S., Weigel, D., King, R.W. Plant Physiol. (2001) [Pubmed]
 
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