PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Citrus unshiu
G2-like Family
Species TF ID Description
GAY32075.1G2-like family protein
GAY32589.1G2-like family protein
GAY32591.1G2-like family protein
GAY32592.1G2-like family protein
GAY34745.1G2-like family protein
GAY35219.1G2-like family protein
GAY35220.1G2-like family protein
GAY35454.1G2-like family protein
GAY35455.1G2-like family protein
GAY35456.1G2-like family protein
GAY35457.1G2-like family protein
GAY36673.1G2-like family protein
GAY36674.1G2-like family protein
GAY36675.1G2-like family protein
GAY36683.1G2-like family protein
GAY37062.1G2-like family protein
GAY37810.1G2-like family protein
GAY38048.1G2-like family protein
GAY39428.1G2-like family protein
GAY39895.1G2-like family protein
GAY40247.1G2-like family protein
GAY40468.1G2-like family protein
GAY42493.1G2-like family protein
GAY43661.1G2-like family protein
GAY43998.1G2-like family protein
GAY47037.1G2-like family protein
GAY47886.1G2-like family protein
GAY48608.1G2-like family protein
GAY49666.1G2-like family protein
GAY50527.1G2-like family protein
GAY54287.1G2-like family protein
GAY55569.1G2-like family protein
GAY56615.1G2-like family protein
GAY57492.1G2-like family protein
GAY58175.1G2-like family protein
GAY58217.1G2-like family protein
GAY62868.1G2-like family protein
GAY63007.1G2-like family protein
GAY63008.1G2-like family protein
GAY63447.1G2-like family protein
GAY63877.1G2-like family protein
GAY64804.1G2-like family protein
GAY65032.1G2-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