PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Klebsormidium flaccidum
B3 Family
Species TF ID Description
kfl00073_0220B3 family protein
kfl00085_0040B3 family protein
kfl00115_0030B3 family protein
kfl00219_0030B3 family protein
kfl00393_0070B3 family protein
kfl00393_0080B3 family protein
kfl00393_0120B3 family protein
kfl00424_0060B3 family protein
kfl00822_0050B3 family protein
B3 Family Introduction

The plant-specific B3 superfamily encompasses well-characterized families, such as the auxin response factor (ARF) family and the LAV family, as well as less well understood families, such as RAV and REM.

All members of the B3 superfamily contain an ~ 110 amino acid region called the B3 domain. This domain was initially named because it was the third basic domain in the maize gene VIVIPAROUS1 (VP1). The first and second basic domains (B1 and B2) are specific to the VP1-like proteins, but genes that contain the B3 domain are widespread in plant genomes. The B3 domain of VP1 encodes a sequence-specific DNA binding activity.

Swaminathan K, Peterson K, Jack T.
The plant B3 superfamily.
Trends Plant Sci, 2008. 13(12): p. 647-55.
PMID: 18986826

Note: In plantTFDB, B3 family includes LAV family, REM family, and RAV family (those do not contain AP2 domain).