PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Triticum urartu
G2-like Family
Species TF ID Description
TRIUR3_00734-P1G2-like family protein
TRIUR3_02291-P1G2-like family protein
TRIUR3_02469-P1G2-like family protein
TRIUR3_06848-P1G2-like family protein
TRIUR3_07027-P1G2-like family protein
TRIUR3_10881-P1G2-like family protein
TRIUR3_11585-P1G2-like family protein
TRIUR3_11963-P1G2-like family protein
TRIUR3_14321-P1G2-like family protein
TRIUR3_14704-P1G2-like family protein
TRIUR3_15041-P1G2-like family protein
TRIUR3_15779-P1G2-like family protein
TRIUR3_15856-P1G2-like family protein
TRIUR3_16070-P1G2-like family protein
TRIUR3_17056-P1G2-like family protein
TRIUR3_18000-P1G2-like family protein
TRIUR3_18158-P1G2-like family protein
TRIUR3_18636-P1G2-like family protein
TRIUR3_18893-P1G2-like family protein
TRIUR3_19145-P1G2-like family protein
TRIUR3_19658-P1G2-like family protein
TRIUR3_20135-P1G2-like family protein
TRIUR3_20429-P1G2-like family protein
TRIUR3_20779-P1G2-like family protein
TRIUR3_22146-P1G2-like family protein
TRIUR3_23402-P1G2-like family protein
TRIUR3_26994-P1G2-like family protein
TRIUR3_27358-P1G2-like family protein
TRIUR3_28039-P1G2-like family protein
TRIUR3_29156-P1G2-like family protein
TRIUR3_29870-P1G2-like family protein
TRIUR3_32248-P1G2-like family protein
TRIUR3_32904-P1G2-like family protein
TRIUR3_33976-P1G2-like family protein
TRIUR3_34123-P1G2-like family protein
TRIUR3_34172-P1G2-like family protein
TRIUR3_34985-P1G2-like family protein
TRIUR3_35002-P1G2-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