PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Aethionema arabicum
G2-like Family
Species TF ID Description
AA102G00020G2-like family protein
AA10G00173G2-like family protein
AA10G00198G2-like family protein
AA12G00221G2-like family protein
AA1304G00001G2-like family protein
AA14G00056G2-like family protein
AA14G00057G2-like family protein
AA15G00308G2-like family protein
AA16G00033G2-like family protein
AA1G00173G2-like family protein
AA21G00055G2-like family protein
AA26G00023G2-like family protein
AA29G00253G2-like family protein
AA2G00088G2-like family protein
AA30G00209G2-like family protein
AA31G00806G2-like family protein
AA32G00370G2-like family protein
AA33G00313G2-like family protein
AA33G00323G2-like family protein
AA37G00119G2-like family protein
AA39G00621G2-like family protein
AA39G00679G2-like family protein
AA3G00207G2-like family protein
AA40G00283G2-like family protein
AA40G00455G2-like family protein
AA420G00009G2-like family protein
AA50G00008G2-like family protein
AA53G00212G2-like family protein
AA53G00593G2-like family protein
AA53G00684G2-like family protein
AA53G00762G2-like family protein
AA53G00817G2-like family protein
AA57G00042G2-like family protein
AA57G00076G2-like family protein
AA5G00098G2-like family protein
AA61G00131G2-like family protein
AA65G00356G2-like family protein
AA6G00039G2-like family protein
AA6G00272G2-like family protein
AA83G00020G2-like family protein
AA87G00380G2-like family protein
AA93G00022G2-like family protein
AA93G00265G2-like family protein
AA9G00126G2-like family protein
G2-like Family Introduction

The GLK proteins are members of the recently categorized GARP superfamily of transcription factors (Riechmann et al., 2000) defined by G2 in maize; the Arabidopsis RESPONSE REGULATOR-B (ARR-B) proteins (Imamura et al., 1999); and the PHOSPHATE STARVATION RESPONSE1 (PSR1) protein of Chlamydomonas (Wykoff et al., 1999). In the case of G2, three of the four defining features of most transcription factors have been verified experimentally in heterologous systems. G2 is nuclearlocalized (Hall et al., 1998), is able to transactivate reporter gene expression, and can both homo-dimerize and heterodimerize with ZmGLK1 (Rossini et al., 2001). DNA-binding activity of GLK proteins has yet to be demonstrated,however, the putative DNA-binding domain is highly conserved with domains in other GARP proteins such as ARR1 and ARR2 (Riechmann et al., 2000). Notably, ARR1 and ARR2 have been shown to bind DNA (Sakai et al.,2000), thus it is likely that GLK proteins act as transcriptional regulators of chloroplast development.

The GLK proteins are members of the GARP superfamily of transcription factors, and phylogenetic analysis demonstrates that the maize, rice and Arabidopsis GLK gene pairs comprise a distinct group within the GARP superfamily. Further phylogenetic analysis suggests that the gene pairs arose through separate duplication events in the monocot and dicot lineages. As in rice, AtGLK1 and AtGLK2 are expressed in partially overlapping domains in photosynthetic tissue. GLK genes therefore regulate chloroplast development in diverse plant species.

Fitter DW, Martin DJ, Copley MJ, Scotland RW, Langdale JA.
GLK gene pairs regulate chloroplast development in diverse plant species.
Plant J. 2002 Sep;31(6):713-27.
PMID: 12220263