The SUPERMAN protein is an active repressor whose carboxy-terminal repression domain is required for the development of normal flowers.
SUPERMAN was identified as a putative regulator of transcription that acts in floral development, but its function remains to be clarified. We demonstrate here that SUPERMAN is an active repressor whose repression domain is located in the carboxy-terminal region. Ectopic expression of SUPERMAN that lacked the repression domain resulted in a phenotype similar to that of superman mutants, demonstrating that the repression activity of SUPERMAN is essential for the development of normal flowers. Constitutive expression of SUPERMAN resulted in a severe dwarfism but did not affect cell size, indicating that SUPERMAN might regulate genes that are involved in cell division.
Hiratsu
Keiichiro
K
Gene Discovery Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Tsukuba 305-8566, Japan.
Ohta
Masaru
M
Matsui
Kyoko
K
Ohme-Takagi
Masaru
M
D020816:Amino Acid Motifs / Q000235:genetics; D017360:Arabidopsis; D029681:Arabidopsis Proteins / Q000378:metabolism; D002455:Cell Division; D018507:Gene Expression Regulation, Developmental / Q000502:physiology; D018506:Gene Expression Regulation, Plant / Q000502:physiology; D017930:Genes, Reporter; D018519:Meristem / Q000254:growth & development / Q000378:metabolism; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D010641:Phenotype; D018514:Plant Structures / Q000254:growth & development* / Q000502:physiology; D030821:Plants, Genetically Modified; D017434:Protein Structure, Tertiary / Q000502:physiology; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism*; D017384:Sequence Deletion; D017386:Sequence Homology, Amino Acid; D014157:Transcription Factors / Q000378:metabolism*
D029681:Arabidopsis Proteins; D012097:Repressor Proteins; D014157:Transcription Factors; C096661:superman protein, Arabidopsis