2l7p

Structural highlights

Function

ASHH2_ARATH Histone methyltransferase involved in di and tri-methylation of 'Lys-36' of histone H3 (H3K36me2 and H3K36me3). Binds to H3 already mono- or di-methylated on 'Lys-4'(H3K4me1 or H3K4me2), but not to H3K4me3. H3K4me and H3K36me represent specific tags for epigenetic transcriptional activation. Regulates positively FLC transcription to prevent early flowering transition. Required for flowering transition in response to vernalization and for the maintenance of FLC expression in late embryos, but dispensable for the initial reactivation in early embryos during reprogramming. Seems also to modulate several traits including floral organ size, root size and dormancy. Promotes apical dominance (PubMed:16299497, PubMed:10518493, PubMed:16258034, PubMed:18070919, PubMed:19915673, PubMed:20711170). Directly involved in the tri-methylation of 'Lys-36' of histone H3 (H3K36me3) at LAZ5 chromatin to maintain a transcriptionally active state of LAZ5, a TIR-NB-LRR protein involved in innate immunity (PubMed:20949080).^{[1] [2] [3] [4] [5] [6] [7]}

See Also

• Histone methyltransferase 3D structures

References

1. ↑ Soppe WJ, Bentsink L, Koornneef M. The early-flowering mutant efs is involved in the autonomous promotion pathway of Arabidopsis thaliana. Development. 1999 Nov;126(21):4763-70. PMID:10518493
2. ↑ Kim SY, He Y, Jacob Y, Noh YS, Michaels S, Amasino R. Establishment of the vernalization-responsive, winter-annual habit in Arabidopsis requires a putative histone H3 methyl transferase. Plant Cell. 2005 Dec;17(12):3301-10. Epub 2005 Oct 28. PMID:16258034 doi:http://dx.doi.org/10.1105/tpc.105.034645
3. ↑ Zhao Z, Yu Y, Meyer D, Wu C, Shen WH. Prevention of early flowering by expression of FLOWERING LOCUS C requires methylation of histone H3 K36. Nat Cell Biol. 2005 Dec;7(12):1256-60. Epub 2005 Nov 20. PMID:16299497 doi:http://dx.doi.org/10.1038/ncb1329
4. ↑ Xu L, Zhao Z, Dong A, Soubigou-Taconnat L, Renou JP, Steinmetz A, Shen WH. Di- and tri- but not monomethylation on histone H3 lysine 36 marks active transcription of genes involved in flowering time regulation and other processes in Arabidopsis thaliana. Mol Cell Biol. 2008 Feb;28(4):1348-60. Epub 2007 Dec 10. PMID:18070919 doi:http://dx.doi.org/10.1128/MCB.01607-07
5. ↑ Grini PE, Thorstensen T, Alm V, Vizcay-Barrena G, Windju SS, Jorstad TS, Wilson ZA, Aalen RB. The ASH1 HOMOLOG 2 (ASHH2) histone H3 methyltransferase is required for ovule and anther development in Arabidopsis. PLoS One. 2009 Nov 12;4(11):e7817. doi: 10.1371/journal.pone.0007817. PMID:19915673 doi:http://dx.doi.org/10.1371/journal.pone.0007817
6. ↑ Ko JH, Mitina I, Tamada Y, Hyun Y, Choi Y, Amasino RM, Noh B, Noh YS. Growth habit determination by the balance of histone methylation activities in Arabidopsis. EMBO J. 2010 Sep 15;29(18):3208-15. doi: 10.1038/emboj.2010.198. Epub 2010 Aug, 13. PMID:20711170 doi:http://dx.doi.org/10.1038/emboj.2010.198
7. ↑ Palma K, Thorgrimsen S, Malinovsky FG, Fiil BK, Nielsen HB, Brodersen P, Hofius D, Petersen M, Mundy J. Autoimmunity in Arabidopsis acd11 is mediated by epigenetic regulation of an immune receptor. PLoS Pathog. 2010 Oct 7;6(10):e1001137. doi: 10.1371/journal.ppat.1001137. PMID:20949080 doi:http://dx.doi.org/10.1371/journal.ppat.1001137