PlantRegMap/PlantTFDB v5.0
Plant Transcription Factor Database
Previous version: v3.0 v4.0
Juglans regia
G2-like Family
Species TF ID Description
WALNUT_00000026-RAG2-like family protein
WALNUT_00001185-RAG2-like family protein
WALNUT_00001242-RAG2-like family protein
WALNUT_00001730-RAG2-like family protein
WALNUT_00002171-RAG2-like family protein
WALNUT_00002330-RAG2-like family protein
WALNUT_00002805-RAG2-like family protein
WALNUT_00003583-RAG2-like family protein
WALNUT_00004088-RAG2-like family protein
WALNUT_00004328-RAG2-like family protein
WALNUT_00005639-RAG2-like family protein
WALNUT_00005678-RAG2-like family protein
WALNUT_00005890-RAG2-like family protein
WALNUT_00006160-RAG2-like family protein
WALNUT_00006318-RAG2-like family protein
WALNUT_00007710-RAG2-like family protein
WALNUT_00009123-RAG2-like family protein
WALNUT_00009408-RAG2-like family protein
WALNUT_00009671-RAG2-like family protein
WALNUT_00010464-RAG2-like family protein
WALNUT_00010825-RAG2-like family protein
WALNUT_00013361-RAG2-like family protein
WALNUT_00013941-RAG2-like family protein
WALNUT_00014601-RAG2-like family protein
WALNUT_00015729-RAG2-like family protein
WALNUT_00015959-RAG2-like family protein
WALNUT_00017963-RAG2-like family protein
WALNUT_00017967-RAG2-like family protein
WALNUT_00019248-RAG2-like family protein
WALNUT_00019874-RAG2-like family protein
WALNUT_00021544-RAG2-like family protein
WALNUT_00022503-RAG2-like family protein
WALNUT_00022627-RAG2-like family protein
WALNUT_00022983-RAG2-like family protein
WALNUT_00022986-RAG2-like family protein
WALNUT_00022987-RAG2-like family protein
WALNUT_00023504-RAG2-like family protein
WALNUT_00023566-RAG2-like family protein
WALNUT_00025758-RAG2-like family protein
WALNUT_00026319-RAG2-like family protein
WALNUT_00026830-RAG2-like family protein
WALNUT_00027093-RAG2-like family protein
WALNUT_00027263-RAG2-like family protein
WALNUT_00027490-RAG2-like family protein
WALNUT_00028144-RAG2-like family protein
WALNUT_00028147-RAG2-like family protein
WALNUT_00028539-RAG2-like family protein
WALNUT_00028540-RAG2-like family protein
WALNUT_00030360-RAG2-like family protein
WALNUT_00032292-RAG2-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