Plant Transcription Factor Database
Previous version: v1.0, v2.0, v3.0
Beta vulgaris
G2-like Family
Species TF ID Description
Bv1_012890_mdoq.t1G2-like family protein
Bv1_019950_ktmf.t1G2-like family protein
Bv2_025210_soor.t1G2-like family protein
Bv2_041110_anzc.t1G2-like family protein
Bv2_045740_qaam.t1G2-like family protein
Bv3_057210_exji.t1G2-like family protein
Bv3_060420_oena.t1G2-like family protein
Bv3_060800_jzfr.t1G2-like family protein
Bv3_060800_jzfr.t2G2-like family protein
Bv3_063380_rotz.t1G2-like family protein
Bv3_063930_wpcq.t1G2-like family protein
Bv3_064450_hwur.t1G2-like family protein
Bv3_064450_hwur.t2G2-like family protein
Bv3_064740_jmoi.t1G2-like family protein
Bv3_064740_jmoi.t2G2-like family protein
Bv3_064740_jmoi.t3G2-like family protein
Bv4_084030_exhz.t1G2-like family protein
Bv5_103110_knze.t1G2-like family protein
Bv5_103110_knze.t2G2-like family protein
Bv5_106980_jzcm.t1G2-like family protein
Bv5_107780_ahot.t1G2-like family protein
Bv6_131690_nsis.t1G2-like family protein
Bv6_134560_dzpj.t1G2-like family protein
Bv6_153750_phiu.t1G2-like family protein
Bv6_155740_wuuo.t1G2-like family protein
Bv7_157810_dmha.t1G2-like family protein
Bv7_173470_fxer.t1G2-like family protein
Bv7_178080_ocxa.t1G2-like family protein
Bv7_180690_ruzs.t1G2-like family protein
Bv8_184250_skrq.t1G2-like family protein
Bv8_185940_xmhg.t1G2-like family protein
Bv8_185950_rpwf.t1G2-like family protein
Bv8_195490_fzee.t1G2-like family protein
Bv9_209620_ccoj.t1G2-like family protein
Bv9_218600_mfok.t1G2-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