Plant Transcription Factor Database
Previous version: v3.0
Oryza sativa subsp. indica
G2-like Family
Species TF ID Description
BGIOSGA000023-PAG2-like family protein
BGIOSGA002040-PAG2-like family protein
BGIOSGA002879-PAG2-like family protein
BGIOSGA003383-PAG2-like family protein
BGIOSGA004786-PAG2-like family protein
BGIOSGA005373-PAG2-like family protein
BGIOSGA007064-PAG2-like family protein
BGIOSGA007162-PAG2-like family protein
BGIOSGA007863-PAG2-like family protein
BGIOSGA008790-PAG2-like family protein
BGIOSGA008860-PAG2-like family protein
BGIOSGA008875-PAG2-like family protein
BGIOSGA010126-PAG2-like family protein
BGIOSGA011527-PAG2-like family protein
BGIOSGA012345-PAG2-like family protein
BGIOSGA012541-PAG2-like family protein
BGIOSGA012553-PAG2-like family protein
BGIOSGA013148-PAG2-like family protein
BGIOSGA013620-PAG2-like family protein
BGIOSGA013627-PAG2-like family protein
BGIOSGA014151-PAG2-like family protein
BGIOSGA016936-PAG2-like family protein
BGIOSGA017051-PAG2-like family protein
BGIOSGA017810-PAG2-like family protein
BGIOSGA017828-PAG2-like family protein
BGIOSGA018058-PAG2-like family protein
BGIOSGA021086-PAG2-like family protein
BGIOSGA022077-PAG2-like family protein
BGIOSGA022875-PAG2-like family protein
BGIOSGA023251-PAG2-like family protein
BGIOSGA023422-PAG2-like family protein
BGIOSGA023423-PAG2-like family protein
BGIOSGA023442-PAG2-like family protein
BGIOSGA023563-PAG2-like family protein
BGIOSGA023696-PAG2-like family protein
BGIOSGA025055-PAG2-like family protein
BGIOSGA025605-PAG2-like family protein
BGIOSGA026931-PAG2-like family protein
BGIOSGA028027-PAG2-like family protein
BGIOSGA028509-PAG2-like family protein
BGIOSGA028510-PAG2-like family protein
BGIOSGA028511-PAG2-like family protein
BGIOSGA028704-PAG2-like family protein
BGIOSGA030473-PAG2-like family protein
BGIOSGA030474-PAG2-like family protein
BGIOSGA030709-PAG2-like family protein
BGIOSGA031479-PAG2-like family protein
BGIOSGA031750-PAG2-like family protein
BGIOSGA035910-PAG2-like family protein
BGIOSGA036796-PAG2-like family protein
BGIOSGA036807-PAG2-like family protein
BGIOSGA037689-PAG2-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