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4psx

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Revision as of 22:58, 4 August 2016

Crystal structure of histone acetyltransferase complex

Structural highlights

4psx is a 8 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Activity:	Histone acetyltransferase, with EC number 2.3.1.48
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[HAT1_YEAST] Catalytic component of the histone acetylase B (HAT-B) complex. Acetylates 'Lys-12' of free histone H4 in the cytoplasm. The complex is also found in the nucleus, however it is not certain that it modifies histone H4 when packaged in chromatin. Histone H4 'Lys-12' acetylation is required for telomeric silencing. Has intrinsic substrate specificity that modifies lysine in recognition sequence GXGKXG. Involved in DNA double-strand break repair.^[1] ^[2] ^[3] ^[4] ^[5] [HAT2_YEAST] Regulatory subunit of the histone acetylase B (HAT-B) complex. The complex acetylates 'Lys-12' of histone H4 which is required for telomeric silencing. HAT2 is required for high affinity binding of the acetyltransferase to histone H4, for the nuclear location of HAT1 and for the HAT1-HIF1 interaction. Alone, it is unable to bind to H4, requiring HAT1 for high affinity interaction with the histone tail. HAT2 has also a HAT1 independent function in life-span regulation.^[6] ^[7] ^[8] ^[9]

Publication Abstract from PubMed

Post-translational modifications of histones are significant regulators of replication, transcription, and DNA repair. Particularly, newly synthesized histone H4 in H3/H4 heterodimers becomes acetylated on N-terminal lysine residues prior to its incorporation into chromatin. Previous studies have established that the histone acetyltransferase (HAT) complex Hat1p/Hat2p medicates this modification. However, the mechanism of how Hat1p/Hat2p recognizes and facilitates the enzymatic activities on the newly assembled H3/H4 heterodimer remains unknown. Furthermore, Hat2p is a WD40 repeat protein, which is found in many histone modifier complexes. However, how the WD40 repeat proteins facilitate enzymatic activities of histone modification enzymes is unclear. In this study, we first solved the high-resolution crystal structure of a Hat1p/Hat2p/CoA/H4 peptide complex and found that the H4 tail interacts with both Hat1p and Hat2p, by which substrate recruitment is facilitated. We further discovered that H3 N-terminal peptides can bind to the Hat2p WD40 domain and solved the structure of the Hat1p/Hat2p/CoA/H4/H3 peptide complex. Moreover, the interaction with Hat2p requires unmodified Arg2/Lys4 and Lys9 on the H3 tail, suggesting a novel model to specify the activity of Hat1p/Hat2p toward newly synthesized H3/H4 heterodimers. Together, our study demonstrated the substrate recognition mechanism by the Hat1p/Hat2p complex, which is critical for DNA replication and other chromatin remodeling processes.

Hat2p recognizes the histone H3 tail to specify the acetylation of the newly synthesized H3/H4 heterodimer by the Hat1p/Hat2p complex.,Li Y, Zhang L, Liu T, Chai C, Fang Q, Wu H, Agudelo Garcia PA, Han Z, Zong S, Yu Y, Zhang X, Parthun MR, Chai J, Xu RM, Yang M Genes Dev. 2014 Jun 1;28(11):1217-27. doi: 10.1101/gad.240531.114. Epub 2014 May , 16. PMID:24835250^[10]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Kleff S, Andrulis ED, Anderson CW, Sternglanz R. Identification of a gene encoding a yeast histone H4 acetyltransferase. J Biol Chem. 1995 Oct 20;270(42):24674-7. PMID:7559580
↑ Kelly TJ, Qin S, Gottschling DE, Parthun MR. Type B histone acetyltransferase Hat1p participates in telomeric silencing. Mol Cell Biol. 2000 Oct;20(19):7051-8. PMID:10982821
↑ Qin S, Parthun MR. Histone H3 and the histone acetyltransferase Hat1p contribute to DNA double-strand break repair. Mol Cell Biol. 2002 Dec;22(23):8353-65. PMID:12417736
↑ Poveda A, Pamblanco M, Tafrov S, Tordera V, Sternglanz R, Sendra R. Hif1 is a component of yeast histone acetyltransferase B, a complex mainly localized in the nucleus. J Biol Chem. 2004 Apr 16;279(16):16033-43. Epub 2004 Feb 3. PMID:14761951 doi:http://dx.doi.org/10.1074/jbc.M314228200
↑ Ai X, Parthun MR. The nuclear Hat1p/Hat2p complex: a molecular link between type B histone acetyltransferases and chromatin assembly. Mol Cell. 2004 Apr 23;14(2):195-205. PMID:15099519
↑ Kelly TJ, Qin S, Gottschling DE, Parthun MR. Type B histone acetyltransferase Hat1p participates in telomeric silencing. Mol Cell Biol. 2000 Oct;20(19):7051-8. PMID:10982821
↑ Poveda A, Pamblanco M, Tafrov S, Tordera V, Sternglanz R, Sendra R. Hif1 is a component of yeast histone acetyltransferase B, a complex mainly localized in the nucleus. J Biol Chem. 2004 Apr 16;279(16):16033-43. Epub 2004 Feb 3. PMID:14761951 doi:http://dx.doi.org/10.1074/jbc.M314228200
↑ Ai X, Parthun MR. The nuclear Hat1p/Hat2p complex: a molecular link between type B histone acetyltransferases and chromatin assembly. Mol Cell. 2004 Apr 23;14(2):195-205. PMID:15099519
↑ Rosaleny LE, Antunez O, Ruiz-Garcia AB, Perez-Ortin JE, Tordera V. Yeast HAT1 and HAT2 deletions have different life-span and transcriptome phenotypes. FEBS Lett. 2005 Aug 1;579(19):4063-8. PMID:16023114 doi:http://dx.doi.org/10.1016/j.febslet.2005.06.028
↑ Li Y, Zhang L, Liu T, Chai C, Fang Q, Wu H, Agudelo Garcia PA, Han Z, Zong S, Yu Y, Zhang X, Parthun MR, Chai J, Xu RM, Yang M. Hat2p recognizes the histone H3 tail to specify the acetylation of the newly synthesized H3/H4 heterodimer by the Hat1p/Hat2p complex. Genes Dev. 2014 Jun 1;28(11):1217-27. doi: 10.1101/gad.240531.114. Epub 2014 May , 16. PMID:24835250 doi:http://dx.doi.org/10.1101/gad.240531.114

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4psx"

@@ Line 1: / Line 1: @@
 ==Crystal structure of histone acetyltransferase complex==
 <StructureSection load='4psx' size='340' side='right' caption='[[4psx]], [[Resolution|resolution]] 2.51&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=COA:COENZYME+A'>COA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Histone_acetyltransferase Histone acetyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.48 2.3.1.48] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4psx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4psx OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4psx RCSB], [http://www.ebi.ac.uk/pdbsum/4psx PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4psx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4psx OCA], [http://pdbe.org/4psx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4psx RCSB], [http://www.ebi.ac.uk/pdbsum/4psx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4psx ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4psx" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

4psx

From Proteopedia

Revision as of 22:58, 4 August 2016

Crystal structure of histone acetyltransferase complex

Structural highlights

Function

Publication Abstract from PubMed

References

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