| Structural highlights
Function
[RT109_YEAST] Required for acetylation of 'Lys-56' of histone H3 (H3K56ac) which occurs in S phase and disappears during G(2)/M phase of the cell cycle and is involved in transcription DNA repair process. H3K56 acetylation weakens of the interaction between the histone core and the surrounding DNA in the nucleosomal particle and drives chromatin disassembly. Involved in regulation of Ty1 transposition.[1] [2] [3] [4] [5] [6] [7] [8] [9]
Evolutionary Conservation
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Publication Abstract from PubMed
Rtt109 is a protein acetyltransferase (PAT) that is responsible for the acetylation of lysine-56 of histone 3 (H3K56) in yeast. H3K56 acetylation has been implicated in the weakening of the interaction between the histone core and the surrounding DNA in the nucleosomal particle. Rtt109, in cooperation with various histone chaperones, promotes genomic stability and is required for resistance to DNA damaging agents. Here, we present the crystal structure of Rtt109 in complex with acetyl-CoA at a 2.0-A resolution. Rtt109 consists of a core PAT domain, which binds the acetyl-CoA cofactor. A second domain, the activation domain, is tightly associated with the PAT domain. Autoacetylation of lysine-290 within the activation domain is required for stabilizing the interaction between the two domains and is essential for catalysis. Biochemical analysis demonstrates the requirement of a loop within the PAT domain for the binding of the histone chaperone Vps75, and mutational analysis identifies key residues for catalysis. We propose a model in which the autoacetylation of Rtt109 is crucial for the regulation of its catalytic activity.
Molecular basis for the autoregulation of the protein acetyl transferase Rtt109.,Stavropoulos P, Nagy V, Blobel G, Hoelz A Proc Natl Acad Sci U S A. 2008 Aug 26;105(34):12236-41. Epub 2008 Aug 21. PMID:18719104[10]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Scholes DT, Banerjee M, Bowen B, Curcio MJ. Multiple regulators of Ty1 transposition in Saccharomyces cerevisiae have conserved roles in genome maintenance. Genetics. 2001 Dec;159(4):1449-65. PMID:11779788
- ↑ Schneider J, Bajwa P, Johnson FC, Bhaumik SR, Shilatifard A. Rtt109 is required for proper H3K56 acetylation: a chromatin mark associated with the elongating RNA polymerase II. J Biol Chem. 2006 Dec 8;281(49):37270-4. Epub 2006 Oct 17. PMID:17046836 doi:http://dx.doi.org/10.1074/jbc.C600265200
- ↑ Han J, Zhou H, Li Z, Xu RM, Zhang Z. The Rtt109-Vps75 histone acetyltransferase complex acetylates non-nucleosomal histone H3. J Biol Chem. 2007 May 11;282(19):14158-64. Epub 2007 Mar 16. PMID:17369253 doi:http://dx.doi.org/10.1074/jbc.M700611200
- ↑ Han J, Zhou H, Li Z, Xu RM, Zhang Z. Acetylation of lysine 56 of histone H3 catalyzed by RTT109 and regulated by ASF1 is required for replisome integrity. J Biol Chem. 2007 Sep 28;282(39):28587-96. Epub 2007 Aug 9. PMID:17690098 doi:http://dx.doi.org/10.1074/jbc.M702496200
- ↑ Tsubota T, Berndsen CE, Erkmann JA, Smith CL, Yang L, Freitas MA, Denu JM, Kaufman PD. Histone H3-K56 acetylation is catalyzed by histone chaperone-dependent complexes. Mol Cell. 2007 Mar 9;25(5):703-12. Epub 2007 Feb 22. PMID:17320445 doi:S1097-2765(07)00086-X
- ↑ Driscoll R, Hudson A, Jackson SP. Yeast Rtt109 promotes genome stability by acetylating histone H3 on lysine 56. Science. 2007 Feb 2;315(5812):649-52. PMID:17272722 doi:http://dx.doi.org/315/5812/649
- ↑ Han J, Zhou H, Horazdovsky B, Zhang K, Xu RM, Zhang Z. Rtt109 acetylates histone H3 lysine 56 and functions in DNA replication. Science. 2007 Feb 2;315(5812):653-5. PMID:17272723 doi:http://dx.doi.org/10.1126/science.1133234
- ↑ Williams SK, Truong D, Tyler JK. Acetylation in the globular core of histone H3 on lysine-56 promotes chromatin disassembly during transcriptional activation. Proc Natl Acad Sci U S A. 2008 Jul 1;105(26):9000-5. doi:, 10.1073/pnas.0800057105. Epub 2008 Jun 24. PMID:18577595 doi:http://dx.doi.org/10.1073/pnas.0800057105
- ↑ Tang Y, Meeth K, Jiang E, Luo C, Marmorstein R. Structure of Vps75 and implications for histone chaperone function. Proc Natl Acad Sci U S A. 2008 Aug 26;105(34):12206-11. Epub 2008 Aug 22. PMID:18723682
- ↑ Stavropoulos P, Nagy V, Blobel G, Hoelz A. Molecular basis for the autoregulation of the protein acetyl transferase Rtt109. Proc Natl Acad Sci U S A. 2008 Aug 26;105(34):12236-41. Epub 2008 Aug 21. PMID:18719104
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