Plant Transcription Factor Database
Previous version: v1.0, v2.0, v3.0
Nelumbo nucifera
G2-like Family
Species TF ID Description
NNU_000023-RAG2-like family protein
NNU_000284-RAG2-like family protein
NNU_000838-RAG2-like family protein
NNU_001193-RAG2-like family protein
NNU_003614-RAG2-like family protein
NNU_004596-RAG2-like family protein
NNU_004697-RAG2-like family protein
NNU_005315-RAG2-like family protein
NNU_005316-RAG2-like family protein
NNU_005317-RAG2-like family protein
NNU_006061-RAG2-like family protein
NNU_006543-RAG2-like family protein
NNU_006595-RAG2-like family protein
NNU_006906-RAG2-like family protein
NNU_006931-RAG2-like family protein
NNU_007634-RAG2-like family protein
NNU_007790-RAG2-like family protein
NNU_007791-RAG2-like family protein
NNU_007976-RAG2-like family protein
NNU_008138-RAG2-like family protein
NNU_008492-RAG2-like family protein
NNU_009658-RAG2-like family protein
NNU_009935-RAG2-like family protein
NNU_010973-RAG2-like family protein
NNU_011051-RAG2-like family protein
NNU_011053-RAG2-like family protein
NNU_011055-RAG2-like family protein
NNU_011780-RAG2-like family protein
NNU_011816-RAG2-like family protein
NNU_012286-RAG2-like family protein
NNU_012287-RAG2-like family protein
NNU_012506-RAG2-like family protein
NNU_012707-RAG2-like family protein
NNU_012954-RAG2-like family protein
NNU_016277-RAG2-like family protein
NNU_016374-RAG2-like family protein
NNU_017077-RAG2-like family protein
NNU_017261-RAG2-like family protein
NNU_019826-RAG2-like family protein
NNU_020096-RAG2-like family protein
NNU_020205-RAG2-like family protein
NNU_021120-RAG2-like family protein
NNU_021405-RAG2-like family protein
NNU_022348-RAG2-like family protein
NNU_024688-RAG2-like family protein
NNU_024947-RAG2-like family protein
NNU_025377-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