NCBI Accession #
NP_566037.1
NCBI GenBank Nucleotide #
NM_130082.4
NCBI Official Full Name
Plant-specific transcription factor YABBY family protein
NCBI Official Synonym Symbols
ABNORMAL FLORAL ORGANS; ABNORMAL FLORAL ORGANS PROTEIN; F4L23.30; FIL; FILAMENTOUS FLOWER; YAB1; YABBY1
NCBI Protein Information
Plant-specific transcription factor YABBY family protein
NCBI Summary
Encodes a member of the YABBY family of transcriptional regulators that is involved in abaxial cell type specification in leaves and fruits. YAB1 acts in a non-cell autonomous fashion within the meristem to affect phyllotactic patterning. The non-autonomous effect on the central region of the meristem is mediated through the activity if Lateral Suppressor (LAS).
UniProt Synonym Gene Names
AFO; AT; FIL
UniProt Protein Name
Axial regulator YABBY 1
UniProt Synonym Protein Names
Fl-54; Protein ABNORMAL FLORAL ORGANS; Protein FILAMENTOUS FLOWER; Protein antherless
UniProt Primary Accession #
O22152
UniProt Related Accession #
O22152
UniProt Comments
Involved in the abaxial cell fate determination during embryogenesis and organogenesis. Regulates the initiation of embryonic shoot apical meristem (SAM) development (PubMed:10323860, PubMed:10331982, PubMed:10457020, PubMed:11812777, PubMed:12417699, PubMed:9878633, Ref. 3, Ref. 6, PubMed:19837869). Required during flower formation and development, particularly for the patterning of floral organs. Positive regulator of class B (AP3 and PI) activity in whorls 2 and 3. Negative regulator of class B activity in whorl 1 and of SUP activity in whorl 3. Interacts with class A proteins (AP1, AP2 and LUG) to repress class C (AG) activity in whorls 1 and 2. Contributes to the repression of KNOX genes (STM, KNAT1/BP and KNAT2) to avoid ectopic meristems. Binds DNA without sequence specificity. In vitro, can compete and displace the AP1 protein binding to DNA containing CArG box (PubMed:10323860, PubMed:10331982, PubMed:10457020, PubMed:11812777, PubMed:12417699, PubMed:9878633, Ref. 3, Ref. 6).