PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Picea abies
G2-like Family
Species TF ID Description
MA_10251997g0010G2-like family protein
MA_10266929g0010G2-like family protein
MA_10432937g0010G2-like family protein
MA_10433112g0010G2-like family protein
MA_118174g0010G2-like family protein
MA_120020g0010G2-like family protein
MA_12161g0010G2-like family protein
MA_138039g0010G2-like family protein
MA_14087g0010G2-like family protein
MA_181986g0010G2-like family protein
MA_21538g0020G2-like family protein
MA_28188g0010G2-like family protein
MA_303578g0010G2-like family protein
MA_3352g0010G2-like family protein
MA_335624g0020G2-like family protein
MA_33594g0010G2-like family protein
MA_52379g0010G2-like family protein
MA_541749g0010G2-like family protein
MA_8183372g0010G2-like family protein
MA_84935g0010G2-like family protein
MA_8865g0010G2-like family protein
MA_937875g0010G2-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