Plant Transcription Factor Database
Previous version: v3.0
Arachis hypogaea
G2-like Family
Species TF ID Description
Ahy007266G2-like family protein
Ahy008075G2-like family protein
Ahy009344G2-like family protein
Ahy009615G2-like family protein
Ahy009846G2-like family protein
Ahy010083G2-like family protein
Ahy010091G2-like family protein
Ahy010200G2-like family protein
Ahy011896G2-like family protein
Ahy012669G2-like family protein
Ahy013095G2-like family protein
Ahy013828G2-like family protein
Ahy014750G2-like family protein
Ahy015148G2-like family protein
Ahy016522G2-like family protein
Ahy016801G2-like family protein
Ahy019855G2-like family protein
Ahy020004G2-like family protein
Ahy020532G2-like family protein
Ahy022755G2-like family protein
Ahy000669G2-like family protein
Ahy010951G2-like family protein
Ahy012077G2-like family protein
Ahy012978G2-like family protein
Ahy019619G2-like family protein
Ahy019694G2-like family protein
Ahy020910G2-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