Protein: Lysine-specific demethylase JMJ14 (EC 1.14.11.67) (Jumonji domain-containing protein 14) (AtJMJ14) (Protein JUMONJI 14) (Jumonji domain-containing protein 4) (AtJmj4) (Lysine-specific histone demethylase JMJ14) ([histone H3]-trimethyl-L-lysine(4) monodemethylase JMJ14) (Q8GUI6)
Organism: Arabidopsis thaliana (Mouse-ear cress)
Function: Transcriptional repressor. Histone demethylase that demethylates 'Lys-4' (H3K4me) of histone H3 with a higher activity for H3K4me3 and H3K4me2 than H3K4me1. No activity on H3K9me3/2, H3K36me3/2 and H3K27me3/2. Function as a nocturne 'eraser' to counteract the diurnal 'writer' methylase activity of ATXR3/SDG2 thus orchestrating the circadian rythm of histone modifications (e.g. H3K4me3) and modulating the rythmic expression of diurnal target genes; this mechanism relies also on the circadian clock oscillators CCA1 and LHY. Involved in a negative regulation of root meristem growth upon suboptimal root growth conditions. Represses FT and TSF expression to inhibit the floral transition. Binds around the transcription start site of the FT locus. Involved in the DRM2-mediated maintenance of DNA methylation, but not required for the de novo DNA methylation. Required for demethylating histone H3K4me3 at the target of RNA silencing. Counteracts the DNA methylation of expressed transgenes; specific attenuation of transgene DNA methylation enhances the production of aberrant RNAs (e.g. uncapped and antisense) that readily induce systemic RDR6-dependent post-transcriptional transgene silencing (PTGS) spreading. Together with NAC051/NAC052 and NAC050, regulates gene expression and flowering time, probably by the promotion of RNA-mediated gene silencing. Together with JMJ16 and JMJ17, required for plant growth and development. Promotes local and systemic immunity (especially toward the bacterial pathogen Pseudomonas syringae Pst DC3000 avrRpt2) by regulating positively pathogen-induced H3K4me3 enrichment and expression of defense genes involved in salicylic acid (SA)- and pipecolic acid (Pip)-mediated defense pathways (e.g. PR1, FMO1, ALD1 and SARD4).
Subcellular location: Nucleus, nucleoplasm {ECO:0000269|PubMed:19946624, ECO:0000269|PubMed:20177424, ECO:0000269|PubMed:21052090}. Nucleus {ECO:0000255|PROSITE-ProRule:PRU00537, ECO:0000255|PROSITE-ProRule:PRU00768, ECO:0000269|PubMed:26617990, ECO:0000269|PubMed:27792779}. Note=Not detected in the nucleolus and the chromocenters.
Interaction partners:
- NAC domain containing protein 50
- NAC domain containing protein 52
- ATP synthase subunit b, chloroplastic
- Histone-lysine N-methyltransferase CLF
- Protein EMBRYONIC FLOWER 1
- ATP synthase subunit d, mitochondrial
- Histone H3-like centromeric protein CENH3
- Histone H3-like 4
- Histone H3-like 2
- Histone H3.3
Sequence:
MDQLASLAESVAMEEDSEKQSIKGESSLEPDSTPSSPKITARWNPSEACRPLVDDAPIFYPTNEDFDDPLGYIEKLRSKAESYGICRIVPPVAWRPPCPLKEKKIWENSKFPTRIQFIDLLQNREPIKKSTKTKKRKRRRISKIGYTRRKRDSGCDTASSGSSDSEGKFGFQTGPDFTLEEFQKYDEYFKECYFQSEDHPGSKASENKKFKPKVKDLEGEYWRIVEQATDEVEVYYGADLETKKFGSGFPKYKPGYPISEADQYSQCGWNLNNLSRLPGSVLAFESCDISGVIVPWLYVGMCFSTFCWHVEDHHLYSMNYLHTGDPKVWYGIPGNHAESFENVMKKRLPDLFEEQPDLLHQLVTQLSPRILKEEGVPVYRAVQRSGEFILTFPKAYHSGFNCGFNCAEAVNVAPVDWLVHGQNAVEGYSKQRRKSSLSHDKLLLGAAMEATYCLWELSLSKKKTPVIARWKRVCSEDGLLTKAVKKRVQMEEERLNHLQDGFSLRKMEGDFDNKRERECFLCFYDLHMSASSCKCSPNRFACLIHAKDLCSCESKDRYILIRHTLDELWALVRALEGDLDAIDLWASKCRDQYPSQHPRAREYAYLKSAPCIKSRGSSKVQQREQNNLQLVSERLQSDLTSNKEVQLKQDGDSDVNRHGHESERNHVHGITDKSAVTDVKLGVGGKFDEKKISVESQNPHSVSDVGCSELAKKVDGCLGGKDQNAATNRLSLSVELLSSGSLVVKKLWCSKQAIYPKGFKSRVKFLSVLDPTNLTNYISEVLDAGLLGPLFRVSVEDYPTENFSNVSAEKCWQMVTQRLKLEIIKKCDQPVSSLTSLQPLESINGLEMFGFLSPHVIKVVEALDPKHQLEEYWNQKAVKLFGAEPIKEGEKDDTEKGGASDPSLDRDTRLLRGLLKKATPEELVMMHGLLCGETRNTELKEELSTLVDKMEISP