PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Catharanthus roseus
G2-like Family
Species TF ID Description
cra_locus_10816_iso_1G2-like family protein
cra_locus_11012_iso_1G2-like family protein
cra_locus_11012_iso_2G2-like family protein
cra_locus_11012_iso_3G2-like family protein
cra_locus_11012_iso_4G2-like family protein
cra_locus_11598_iso_1G2-like family protein
cra_locus_11598_iso_2G2-like family protein
cra_locus_11598_iso_4G2-like family protein
cra_locus_11823_iso_1G2-like family protein
cra_locus_11823_iso_2G2-like family protein
cra_locus_11823_iso_3G2-like family protein
cra_locus_11823_iso_4G2-like family protein
cra_locus_11823_iso_5G2-like family protein
cra_locus_13549_iso_1G2-like family protein
cra_locus_1383_iso_6G2-like family protein
cra_locus_15373_iso_1G2-like family protein
cra_locus_15774_iso_1G2-like family protein
cra_locus_15774_iso_2G2-like family protein
cra_locus_16841_iso_1G2-like family protein
cra_locus_17221_iso_1G2-like family protein
cra_locus_17221_iso_2G2-like family protein
cra_locus_19353_iso_1G2-like family protein
cra_locus_19353_iso_2G2-like family protein
cra_locus_2093_iso_4G2-like family protein
cra_locus_23355_iso_1G2-like family protein
cra_locus_2466_iso_10G2-like family protein
cra_locus_2466_iso_2G2-like family protein
cra_locus_2466_iso_3G2-like family protein
cra_locus_2466_iso_4G2-like family protein
cra_locus_2466_iso_8G2-like family protein
cra_locus_2560_iso_1G2-like family protein
cra_locus_2560_iso_2G2-like family protein
cra_locus_2560_iso_3G2-like family protein
cra_locus_2560_iso_4G2-like family protein
cra_locus_2560_iso_5G2-like family protein
cra_locus_27627_iso_1G2-like family protein
cra_locus_3317_iso_1G2-like family protein
cra_locus_3317_iso_2G2-like family protein
cra_locus_4511_iso_2G2-like family protein
cra_locus_4511_iso_3G2-like family protein
cra_locus_4511_iso_5G2-like family protein
cra_locus_4511_iso_7G2-like family protein
cra_locus_47931_iso_2G2-like family protein
cra_locus_57500_iso_1G2-like family protein
cra_locus_5886_iso_1G2-like family protein
cra_locus_5886_iso_2G2-like family protein
cra_locus_5886_iso_3G2-like family protein
cra_locus_5886_iso_5G2-like family protein
cra_locus_6959_iso_3G2-like family protein
cra_locus_6959_iso_4G2-like family protein
cra_locus_6959_iso_5G2-like family protein
cra_locus_6959_iso_6G2-like family protein
cra_locus_6959_iso_7G2-like family protein
cra_locus_7019_iso_1G2-like family protein
cra_locus_7793_iso_1G2-like family protein
cra_locus_7793_iso_2G2-like family protein
cra_locus_7793_iso_3G2-like family protein
cra_locus_7793_iso_5G2-like family protein
cra_locus_78154_iso_1G2-like family protein
cra_locus_8079_iso_1G2-like family protein
cra_locus_9362_iso_1G2-like family protein
cra_locus_9362_iso_2G2-like family protein
cra_locus_9362_iso_3G2-like family protein
cra_locus_9362_iso_5G2-like family protein
cra_locus_9734_iso_3G2-like family protein
cra_locus_9734_iso_4G2-like family protein
cra_locus_9734_iso_5G2-like family protein
cra_locus_9787_iso_1G2-like family protein
cra_locus_9787_iso_3G2-like family protein
cra_locus_9787_iso_4G2-like family protein
cra_locus_9787_iso_6G2-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