PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Arabidopsis lyrata
G2-like Family
Species TF ID Description
317308G2-like family protein
319110G2-like family protein
319343G2-like family protein
321718G2-like family protein
321945G2-like family protein
322721G2-like family protein
343166G2-like family protein
352378G2-like family protein
352380G2-like family protein
352381G2-like family protein
356449G2-like family protein
356853G2-like family protein
471638G2-like family protein
473414G2-like family protein
474091G2-like family protein
475994G2-like family protein
476093G2-like family protein
477109G2-like family protein
478672G2-like family protein
480887G2-like family protein
482841G2-like family protein
484011G2-like family protein
484129G2-like family protein
485038G2-like family protein
487493G2-like family protein
488696G2-like family protein
489672G2-like family protein
490936G2-like family protein
491902G2-like family protein
493108G2-like family protein
494575G2-like family protein
494773G2-like family protein
496092G2-like family protein
859493G2-like family protein
862056G2-like family protein
871711G2-like family protein
880939G2-like family protein
883222G2-like family protein
888696G2-like family protein
893617G2-like family protein
897268G2-like family protein
897483G2-like family protein
899405G2-like family protein
900392G2-like family protein
903400G2-like family protein
904629G2-like family protein
908412G2-like family protein
911716G2-like family protein
915615G2-like family protein
915820G2-like family protein
916384G2-like family protein
916966G2-like family protein
918675G2-like family protein
918997G2-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