PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Ricinus communis
C3H Family
Species TF ID Description
27810.m000633C3H family protein
27810.m000634C3H family protein
27843.m000161C3H family protein
27843.m000162C3H family protein
28076.m000420C3H family protein
28140.m000105C3H family protein
28320.m001098C3H family protein
28752.m000323C3H family protein
29586.m000617C3H family protein
29593.m000174C3H family protein
29609.m000599C3H family protein
29620.m000559C3H family protein
29638.m000519C3H family protein
29647.m002009C3H family protein
29648.m001973C3H family protein
29660.m000770C3H family protein
29681.m001358C3H family protein
29726.m004014C3H family protein
29727.m000480C3H family protein
29733.m000748C3H family protein
29733.m000763C3H family protein
29805.m001499C3H family protein
29838.m001638C3H family protein
29841.m002814C3H family protein
29912.m005330C3H family protein
29983.m003151C3H family protein
30054.m000801C3H family protein
30054.m000804C3H family protein
30061.m000291C3H family protein
30128.m008963C3H family protein
30128.m009030C3H family protein
30131.m007147C3H family protein
30147.m013813C3H family protein
30147.m014320C3H family protein
30169.m006450C3H family protein
30189.m001642C3H 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