Plant Transcription Factor Database
Previous version: v3.0
Petunia axillaris
G2-like Family
Species TF ID Description
Peaxi162Scf00000g60665.1G2-like family protein
Peaxi162Scf00003g00514.1G2-like family protein
Peaxi162Scf00003g04333.1G2-like family protein
Peaxi162Scf00006g00174.1G2-like family protein
Peaxi162Scf00007g00016.1G2-like family protein
Peaxi162Scf00008g00498.1G2-like family protein
Peaxi162Scf00016g01526.1G2-like family protein
Peaxi162Scf00021g00523.1G2-like family protein
Peaxi162Scf00025g00312.1G2-like family protein
Peaxi162Scf00045g00221.1G2-like family protein
Peaxi162Scf00047g00522.1G2-like family protein
Peaxi162Scf00047g02233.1G2-like family protein
Peaxi162Scf00078g00177.1G2-like family protein
Peaxi162Scf00096g00412.1G2-like family protein
Peaxi162Scf00131g00096.1G2-like family protein
Peaxi162Scf00141g01227.1G2-like family protein
Peaxi162Scf00146g00006.1G2-like family protein
Peaxi162Scf00146g00719.1G2-like family protein
Peaxi162Scf00153g01211.1G2-like family protein
Peaxi162Scf00154g00019.1G2-like family protein
Peaxi162Scf00156g00915.1G2-like family protein
Peaxi162Scf00170g00063.1G2-like family protein
Peaxi162Scf00185g00095.1G2-like family protein
Peaxi162Scf00185g01625.1G2-like family protein
Peaxi162Scf00248g00125.1G2-like family protein
Peaxi162Scf00258g00225.1G2-like family protein
Peaxi162Scf00265g00015.1G2-like family protein
Peaxi162Scf00284g00619.1G2-like family protein
Peaxi162Scf00347g00712.1G2-like family protein
Peaxi162Scf00373g00096.1G2-like family protein
Peaxi162Scf00380g00618.1G2-like family protein
Peaxi162Scf00404g00810.1G2-like family protein
Peaxi162Scf00406g01119.1G2-like family protein
Peaxi162Scf00408g00321.1G2-like family protein
Peaxi162Scf00415g00079.1G2-like family protein
Peaxi162Scf00424g00110.1G2-like family protein
Peaxi162Scf00452g00240.1G2-like family protein
Peaxi162Scf00469g00412.1G2-like family protein
Peaxi162Scf00563g00527.1G2-like family protein
Peaxi162Scf00652g00422.1G2-like family protein
Peaxi162Scf00684g00572.1G2-like family protein
Peaxi162Scf00705g00001.1G2-like family protein
Peaxi162Scf00798g00318.1G2-like family protein
Peaxi162Scf00845g00116.1G2-like family protein
Peaxi162Scf00940g00110.1G2-like family protein
Peaxi162Scf00984g00245.1G2-like family protein
Peaxi162Scf00993g00033.1G2-like family protein
Peaxi162Scf01132g00339.1G2-like family protein
Peaxi162Scf01413g00006.1G2-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