PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Parasponia andersonii
G2-like Family
Species TF ID Description
PON31192.1G2-like family protein
PON32528.1G2-like family protein
PON34593.1G2-like family protein
PON35026.1G2-like family protein
PON36563.1G2-like family protein
PON39689.1G2-like family protein
PON41826.1G2-like family protein
PON42508.1G2-like family protein
PON42933.1G2-like family protein
PON43101.1G2-like family protein
PON43804.1G2-like family protein
PON44357.1G2-like family protein
PON44453.1G2-like family protein
PON49189.1G2-like family protein
PON50860.1G2-like family protein
PON51148.1G2-like family protein
PON51384.1G2-like family protein
PON52080.1G2-like family protein
PON52220.1G2-like family protein
PON52221.1G2-like family protein
PON52428.1G2-like family protein
PON55500.1G2-like family protein
PON57686.1G2-like family protein
PON57687.1G2-like family protein
PON58332.1G2-like family protein
PON58482.1G2-like family protein
PON59508.1G2-like family protein
PON60071.1G2-like family protein
PON63731.1G2-like family protein
PON67553.1G2-like family protein
PON70128.1G2-like family protein
PON75002.1G2-like family protein
PON75596.1G2-like family protein
PON77014.1G2-like family protein
PON79186.1G2-like family protein
PON79268.1G2-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