PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Klebsormidium flaccidum
C3H Family
Species TF ID Description
kfl00011_0350C3H family protein
kfl00015_0110C3H family protein
kfl00015_0430C3H family protein
kfl00026_0390C3H family protein
kfl00028_0220C3H family protein
kfl00056_0320C3H family protein
kfl00101_0290C3H family protein
kfl00108_0210C3H family protein
kfl00120_0240C3H family protein
kfl00134_0260C3H family protein
kfl00155_0010C3H family protein
kfl00162_0180C3H family protein
kfl00173_0180C3H family protein
kfl00197_0160C3H family protein
kfl00212_0080C3H family protein
kfl00223_0160C3H family protein
kfl00224_0090C3H family protein
kfl00226_0130C3H family protein
kfl00242_0140C3H family protein
kfl00263_0160C3H family protein
kfl00265_0040C3H family protein
kfl00356_0010C3H family protein
kfl00412_0170C3H family protein
kfl00432_0070C3H family protein
kfl00457_0110C3H family protein
kfl00462_0120C3H family protein
kfl00492_0010C3H family protein
kfl00544_0010C3H family protein
kfl00619_0040C3H family protein
C3H Family Introduction

One gene isolated by virtual subtraction is PEI. It encodes a protein containing a Cys3His zinc finger domain associated with a number of animal and fungal transcription factors. In situ hybridization results showed that PEI1 is expressed throughout the embryo from globular to late cotyledon stage. Transgenic Arabidopsis plants expressing a PEI1 antisense gene produced white seeds in which embryo development did not progress through heart stage. Aberrant embryos failed to form cotyledons, but the embryonic root appeared to be normal. Aberrant embryos did not turn green, and the expression of genes involved in photomorphogenesis was drastically attenuated. In culture, aberrant embryos did not form true leaves, but root formation was apparently normal. These results suggest that PEI1 is an embryo-specific transcription factor that plays an important role during Arabidopsis embryogenesis, functioning primarily in the apical domain of the embryo.

we used a random binding site selection method to show that recombinant PEI1 protein purified from Escherichia coli can bind to specific DNA sequences. This DNA binding activity supports the prediction that PEI1 is an embryo-specific transcription factor.

Z Li and T L Thomas.
PEI1, an embryo-specific zinc finger protein gene required for heart-stage embryo formation in Arabidopsis.
Plant Cell, 1998. 10(3): p. 383-98.
PMID: 9501112