PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Sisymbrium irio
G2-like Family
Species TF ID Description
676708632G2-like family protein
676711000G2-like family protein
676713694G2-like family protein
676715384G2-like family protein
676716472G2-like family protein
676717430G2-like family protein
676720864G2-like family protein
676721166G2-like family protein
676723852G2-like family protein
676724704G2-like family protein
676728356G2-like family protein
676729010G2-like family protein
676732492G2-like family protein
676732494G2-like family protein
676733134G2-like family protein
676733308G2-like family protein
676733480G2-like family protein
676735596G2-like family protein
676735758G2-like family protein
676739736G2-like family protein
676742220G2-like family protein
676742866G2-like family protein
676744648G2-like family protein
676748454G2-like family protein
676750324G2-like family protein
676751214G2-like family protein
676752710G2-like family protein
676753222G2-like family protein
676755466G2-like family protein
676755578G2-like family protein
676755794G2-like family protein
676755798G2-like family protein
676757144G2-like family protein
676758252G2-like family protein
676764462G2-like family protein
676765018G2-like family protein
676766244G2-like family protein
676768780G2-like family protein
676777694G2-like family protein
676781968G2-like family protein
676782636G2-like family protein
676788332G2-like family protein
676789134G2-like family protein
676789262G2-like family protein
676790852G2-like family protein
676792990G2-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