PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Phalaenopsis equestris
G2-like Family
Species TF ID Description
PEQU_00348G2-like family protein
PEQU_00743G2-like family protein
PEQU_01814G2-like family protein
PEQU_05901G2-like family protein
PEQU_06318G2-like family protein
PEQU_06577G2-like family protein
PEQU_07132G2-like family protein
PEQU_08415G2-like family protein
PEQU_08850G2-like family protein
PEQU_09213G2-like family protein
PEQU_09738G2-like family protein
PEQU_09870G2-like family protein
PEQU_10677G2-like family protein
PEQU_11035G2-like family protein
PEQU_12386G2-like family protein
PEQU_13291G2-like family protein
PEQU_13337G2-like family protein
PEQU_13673G2-like family protein
PEQU_15347G2-like family protein
PEQU_15381G2-like family protein
PEQU_16234G2-like family protein
PEQU_17183G2-like family protein
PEQU_17357G2-like family protein
PEQU_17379G2-like family protein
PEQU_17535G2-like family protein
PEQU_18047G2-like family protein
PEQU_18334G2-like family protein
PEQU_18949G2-like family protein
PEQU_22301G2-like family protein
PEQU_22447G2-like family protein
PEQU_24486G2-like family protein
PEQU_26158G2-like family protein
PEQU_26160G2-like family protein
PEQU_26724G2-like family protein
PEQU_27247G2-like family protein
PEQU_27343G2-like family protein
PEQU_30690G2-like family protein
PEQU_30954G2-like family protein
PEQU_34364G2-like family protein
PEQU_36237G2-like family protein
PEQU_36425G2-like family protein
PEQU_40535G2-like family protein
PEQU_40820G2-like family protein
PEQU_41236G2-like family protein
PEQU_42242G2-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