| Structural highlights
2l7p is a 1 chain structure with sequence from Arath. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | |
| Gene: | ASHH2, EFS, SDG8, SET8, At1g77300, T14N5.15 (ARATH) |
| Activity: | Histone-lysine N-methyltransferase, with EC number 2.1.1.43 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
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]
Publication Abstract from PubMed
Post-translational modifications of the N-terminal histone tails, including lysine methylation, have key roles in regulation of chromatin and gene expression. A number of protein modules have been identified that recognize differentially modified histone tails and provide their proteins with the capacity to sense such modifications. Here, we identify the CW domain of plant and animal chromatin-related proteins as a novel module that recognizes different methylated states of lysine 4 on histone H3 (H3K4me). The solution structure of the CW domain of the Arabidopsis ASH1 HOMOLOG2 (ASHH2) histone methyltransferase provides insight into how different CW domains can distinguish different methylated histone tails. We provide evidence that ASHH2 is acting on H3K4me-marked genes, allowing for ASHH2-dependent H3K36 tri-methylation, which contributes to sustained expression of tissue-specific and developmentally regulated genes. This suggests that ASHH2 is a combined 'reader' and 'writer' of the histone code. We propose that different CW domains, dependent on their specificity for different H3K4 methylations, are important for epigenetic memory or participate in switching between permissive and repressive chromatin states.
The CW domain, a new histone recognition module in chromatin proteins.,Hoppmann V, Thorstensen T, Kristiansen PE, Veiseth SV, Rahman MA, Finne K, Aalen RB, Aasland R EMBO J. 2011 Apr 26. PMID:21522130[8]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ 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
- ↑ 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
- ↑ 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
- ↑ 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
- ↑ 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
- ↑ 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
- ↑ 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
- ↑ Hoppmann V, Thorstensen T, Kristiansen PE, Veiseth SV, Rahman MA, Finne K, Aalen RB, Aasland R. The CW domain, a new histone recognition module in chromatin proteins. EMBO J. 2011 Apr 26. PMID:21522130 doi:10.1038/emboj.2011.108
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