PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Coffea canephora
G2-like Family
Species TF ID Description
Cc01_g05000G2-like family protein
Cc01_g13250G2-like family protein
Cc01_g14590G2-like family protein
Cc01_g17920G2-like family protein
Cc02_g06160G2-like family protein
Cc02_g15120G2-like family protein
Cc02_g18460G2-like family protein
Cc02_g31030G2-like family protein
Cc03_g07780G2-like family protein
Cc05_g01050G2-like family protein
Cc05_g01060G2-like family protein
Cc05_g01070G2-like family protein
Cc05_g07710G2-like family protein
Cc05_g16570G2-like family protein
Cc06_g00990G2-like family protein
Cc06_g01270G2-like family protein
Cc06_g05860G2-like family protein
Cc06_g09140G2-like family protein
Cc06_g16130G2-like family protein
Cc06_g20160G2-like family protein
Cc07_g05730G2-like family protein
Cc07_g13030G2-like family protein
Cc08_g03280G2-like family protein
Cc08_g03290G2-like family protein
Cc08_g04300G2-like family protein
Cc09_g00080G2-like family protein
Cc09_g01520G2-like family protein
Cc09_g02840G2-like family protein
Cc09_g08400G2-like family protein
Cc10_g03650G2-like family protein
Cc10_g10050G2-like family protein
Cc11_g04980G2-like family protein
Cc11_g08080G2-like family protein
Cc11_g10520G2-like family protein
Cc11_g12890G2-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