Plant Transcription Factor Database
Previous version: v3.0
Oropetium thomaeum
G2-like Family
Species TF ID Description
Oropetium_20150105_01196AG2-like family protein
Oropetium_20150105_01219AG2-like family protein
Oropetium_20150105_01403AG2-like family protein
Oropetium_20150105_01584AG2-like family protein
Oropetium_20150105_01988AG2-like family protein
Oropetium_20150105_02243AG2-like family protein
Oropetium_20150105_02287AG2-like family protein
Oropetium_20150105_03373AG2-like family protein
Oropetium_20150105_03398AG2-like family protein
Oropetium_20150105_03605AG2-like family protein
Oropetium_20150105_04613AG2-like family protein
Oropetium_20150105_05090AG2-like family protein
Oropetium_20150105_06008AG2-like family protein
Oropetium_20150105_06183AG2-like family protein
Oropetium_20150105_06184AG2-like family protein
Oropetium_20150105_06247AG2-like family protein
Oropetium_20150105_06819AG2-like family protein
Oropetium_20150105_06820AG2-like family protein
Oropetium_20150105_07278AG2-like family protein
Oropetium_20150105_07666AG2-like family protein
Oropetium_20150105_07680AG2-like family protein
Oropetium_20150105_08299AG2-like family protein
Oropetium_20150105_08450AG2-like family protein
Oropetium_20150105_09313AG2-like family protein
Oropetium_20150105_10068AG2-like family protein
Oropetium_20150105_10166AG2-like family protein
Oropetium_20150105_12765AG2-like family protein
Oropetium_20150105_15625AG2-like family protein
Oropetium_20150105_15661AG2-like family protein
Oropetium_20150105_16305AG2-like family protein
Oropetium_20150105_17686AG2-like family protein
Oropetium_20150105_17753AG2-like family protein
Oropetium_20150105_18122AG2-like family protein
Oropetium_20150105_18141AG2-like family protein
Oropetium_20150105_18339AG2-like family protein
Oropetium_20150105_19015AG2-like family protein
Oropetium_20150105_19338AG2-like family protein
Oropetium_20150105_19361AG2-like family protein
Oropetium_20150105_19945AG2-like family protein
Oropetium_20150105_21169AG2-like family protein
Oropetium_20150105_22201AG2-like family protein
Oropetium_20150105_22428AG2-like family protein
Oropetium_20150105_22875AG2-like family protein
Oropetium_20150105_23175AG2-like family protein
Oropetium_20150105_25911AG2-like family protein
Oropetium_20150105_25981AG2-like family protein
Oropetium_20150105_25988AG2-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