LMPD Database

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LMP011374

UniProt Annotations

Entry Information
Gene Nametranscription factor MYB21
Protein EntryMYB21_ARATH
UniProt IDQ9LK95
SpeciesArabidopsis
Comments
Comment typeDescription
Disruption PhenotypeShort anther filaments, delayed anther dehiscence and greatly reduced male fertility. Myb21 and myb24 double mutant is more severely sterile than myb21 mutant and has petals that just grew out of the sepals but ended at a lower level than the stigma. Myb21 and myb57 double mutant has an intermediate sterility phenotype and petals that grew to a final height parallel to the pistil. Myb21, myb24 and myb57 triple mutant has a strongly reduced fertility and an arrested growth of the petals that never grew out of the sepals. {ECO:0000269|PubMed:16805732, ECO:0000269|PubMed:19325888}.
FunctionTranscription factor involved in photomorphogenesis in the light. May act downstream of the light receptor network and directly affects transcription of light-induced genes. In darkness, its probable degradation prevent the activation of light-induced genes. Required to activate expression of PAL. Acts redundantly with MYB24 and MYB57 to control stamen filament elongation in the late developed flowers. Contributes with MYB24 to induction of MYB108 by jasmonate. Repressed at the transcript levels by DELLA proteins. {ECO:0000269|PubMed:11967090, ECO:0000269|PubMed:16805732, ECO:0000269|PubMed:19091873, ECO:0000269|PubMed:19325888, ECO:0000269|PubMed:21447791}.
InductionUp-regulated by jasmonate. {ECO:0000269|PubMed:16805732}.
PtmProbably ubiquitinated by COP1. Ubiquitination takes place in darkness and leads to its subsequent degradation, thereby preventing to activate photomorphogenesis signals (Probable). {ECO:0000305}.
SimilarityContains 2 HTH myb-type DNA-binding domains. {ECO:0000255|PROSITE-ProRule:PRU00625}.
Subcellular LocationNucleus {ECO:0000305}.
SubunitInteracts (via N-terminus) with TIFY10A/JAZ1, TIFY5A/JAZ8 AND TIFY3A/JAZ11. {ECO:0000269|PubMed:21447791}.
Tissue SpecificityMainly expressed in floral tissues. expressed in all four whorls of the flower, in the anther vascular tissue and in cells at the junction between anther and stamen filaments. Detected in the nectaries and ovules. {ECO:0000269|PubMed:16805732, ECO:0000269|PubMed:19325888, ECO:0000269|Ref.1}.