Plant Transcription Factor Database
Previous version: v1.0, v2.0, v3.0
Dorcoceras hygrometricum
G2-like Family
Species TF ID Description
KZV14613.1G2-like family protein
KZV16313.1G2-like family protein
KZV17758.1G2-like family protein
KZV18613.1G2-like family protein
KZV20625.1G2-like family protein
KZV21505.1G2-like family protein
KZV22484.1G2-like family protein
KZV24290.1G2-like family protein
KZV24681.1G2-like family protein
KZV25641.1G2-like family protein
KZV27589.1G2-like family protein
KZV27590.1G2-like family protein
KZV28432.1G2-like family protein
KZV29736.1G2-like family protein
KZV30476.1G2-like family protein
KZV31385.1G2-like family protein
KZV32597.1G2-like family protein
KZV32907.1G2-like family protein
KZV33711.1G2-like family protein
KZV35756.1G2-like family protein
KZV36391.1G2-like family protein
KZV37181.1G2-like family protein
KZV37576.1G2-like family protein
KZV39612.1G2-like family protein
KZV39710.1G2-like family protein
KZV40329.1G2-like family protein
KZV41150.1G2-like family protein
KZV41584.1G2-like family protein
KZV44775.1G2-like family protein
KZV44776.1G2-like family protein
KZV44796.1G2-like family protein
KZV45211.1G2-like family protein
KZV45804.1G2-like family protein
KZV46794.1G2-like family protein
KZV47073.1G2-like family protein
KZV47568.1G2-like family protein
KZV49650.1G2-like family protein
KZV51255.1G2-like family protein
KZV52692.1G2-like family protein
KZV53795.1G2-like family protein
KZV54049.1G2-like family protein
KZV55197.1G2-like family protein
KZV55602.1G2-like family protein
KZV55605.1G2-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