Claim · model-written summary
A novel R2R3-MYB transcriptional repressor, named PbrMYBL4, was identified from pear.
- Taxon
- pear
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communise1 - Gene
- PbrMYBL4e1
- Outcome
- novel R2R3-MYB transcriptional repressore1
Not reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e1“we identified a novel R2R3-MYB transcriptional repressor from pear, named PbrMYBL4”
t0“pear fruit”
Title
Shangyun Li; Yutao Yang; Zhiwei Zhou; et al. Horticulture Research 2026. doi:10.1093/hr/uhag150
Other claims from this paper (7)
- Observation PbrMYBL4 is predominantly expressed in the pear fruit pericarp.
- Observation The PbrMYBL4 protein is nuclear-localized and contains a canonical EAR repression motif.
- Mechanism PbrMYBL4 simultaneously inhibited anthocyanin accumulation and chlorophyll degradation.
- Mechanism PbrMYBL4 represses anthocyanin biosynthesis by directly downregulating the structural genes PbrF3H and PbrANS.
- Mechanism PbrMYBL4 binds the promoter of the master activator PbrMYB10b to suppress its transcription.
- Mechanism PbrMYBL4 interacts with PbrbHLH3 to form a repressive complex that competitively disrupts formation of the activating PbrMYB10b-PbrbHLH3 complex, amplifying repression of anthocyanin pathway genes.
- Mechanism PbrMYBL4 inhibits chlorophyll degradation by directly repressing the chlorophyll degradation gene PbrSGRL.