|
|
| Line 1: |
Line 1: |
| | | | |
| | ==The Structural basis of sirtuin substrate specificity== | | ==The Structural basis of sirtuin substrate specificity== |
| - | <StructureSection load='2h2h' size='340' side='right' caption='[[2h2h]], [[Resolution|resolution]] 2.20Å' scene=''> | + | <StructureSection load='2h2h' size='340' side='right'caption='[[2h2h]], [[Resolution|resolution]] 2.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2h2h]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43589 Atcc 43589]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2H2H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2H2H FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2h2h]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_43589 Atcc 43589]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2H2H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2H2H FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=ALY:N(6)-ACETYLLYSINE'>ALY</scene></td></tr> | | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=ALY:N(6)-ACETYLLYSINE'>ALY</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">npdA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2336 ATCC 43589])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">npdA ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2336 ATCC 43589])</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=2h2h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2h2h OCA], [http://pdbe.org/2h2h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2h2h RCSB], [http://www.ebi.ac.uk/pdbsum/2h2h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2h2h ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2h2h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2h2h OCA], [https://pdbe.org/2h2h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2h2h RCSB], [https://www.ebi.ac.uk/pdbsum/2h2h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2h2h ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NPD_THEMA NPD_THEMA]] NAD-dependent protein deacetylase which modulates the activities of several enzymes which are inactive in their acetylated form. Has also depropionylation activity in vitro. Also able to ADP-ribosylate peptide substrates with Arg or Lys in the +2 position. The role of this function in vivo is not clear.<ref>PMID:17684016</ref> <ref>PMID:16905097</ref> <ref>PMID:19801667</ref> | + | [[https://www.uniprot.org/uniprot/NPD_THEMA NPD_THEMA]] NAD-dependent protein deacetylase which modulates the activities of several enzymes which are inactive in their acetylated form. Has also depropionylation activity in vitro. Also able to ADP-ribosylate peptide substrates with Arg or Lys in the +2 position. The role of this function in vivo is not clear.<ref>PMID:17684016</ref> <ref>PMID:16905097</ref> <ref>PMID:19801667</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| Line 35: |
Line 35: |
| | </StructureSection> | | </StructureSection> |
| | [[Category: Atcc 43589]] | | [[Category: Atcc 43589]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Cosgrove, M S]] | | [[Category: Cosgrove, M S]] |
| | [[Category: Wolberger, C]] | | [[Category: Wolberger, C]] |
| | [[Category: H4-k79ac]] | | [[Category: H4-k79ac]] |
| | [[Category: Hydrolase]] | | [[Category: Hydrolase]] |
| Structural highlights
Function
[NPD_THEMA] NAD-dependent protein deacetylase which modulates the activities of several enzymes which are inactive in their acetylated form. Has also depropionylation activity in vitro. Also able to ADP-ribosylate peptide substrates with Arg or Lys in the +2 position. The role of this function in vivo is not clear.[1] [2] [3]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Sirtuins comprise a family of enzymes that catalyze the deacetylation of acetyllysine side chains in a reaction that consumes NAD+. Although several crystal structures of sirtuins bound to non-native acetyl peptides have been determined, relatively little about how sirtuins discriminate among different substrates is understood. We have carried out a systematic structural and thermodynamic analysis of several peptides bound to a single sirtuin, the Sir2 homologue from Thermatoga maritima (Sir2Tm). We report structures of five different forms of Sir2Tm: two forms bound to the p53 C-terminal tail in the acetylated and unacetylated states, two forms bound to putative acetyl peptide substrates derived from the structured domains of histones H3 and H4, and one form bound to polypropylene glycol (PPG), which resembles the apoenzyme. The structures reveal previously unobserved complementary side chain interactions between Sir2Tm and the first residue N-terminal to the acetyllysine (position -1) and the second residue C-terminal to the acetyllysine (position +2). Isothermal titration calorimetry was used to compare binding constants between wild-type and mutant forms of Sir2Tm and between additional acetyl peptide substrates with substitutions at positions -1 and +2. The results are consistent with a model in which peptide positions -1 and +2 play a significant role in sirtuin substrate binding. This model provides a framework for identifying sirtuin substrates.
The structural basis of sirtuin substrate affinity.,Cosgrove MS, Bever K, Avalos JL, Muhammad S, Zhang X, Wolberger C Biochemistry. 2006 Jun 20;45(24):7511-21. PMID:16768447[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Garrity J, Gardner JG, Hawse W, Wolberger C, Escalante-Semerena JC. N-lysine propionylation controls the activity of propionyl-CoA synthetase. J Biol Chem. 2007 Oct 12;282(41):30239-45. Epub 2007 Aug 7. PMID:17684016 doi:10.1074/jbc.M704409200
- ↑ Hoff KG, Avalos JL, Sens K, Wolberger C. Insights into the sirtuin mechanism from ternary complexes containing NAD+ and acetylated peptide. Structure. 2006 Aug;14(8):1231-40. PMID:16905097 doi:http://dx.doi.org/10.1016/j.str.2006.06.006
- ↑ Hawse WF, Wolberger C. Structure-based mechanism of ADP-ribosylation by sirtuins. J Biol Chem. 2009 Nov 27;284(48):33654-61. Epub 2009 Sep 30. PMID:19801667 doi:10.1074/jbc.M109.024521
- ↑ Cosgrove MS, Bever K, Avalos JL, Muhammad S, Zhang X, Wolberger C. The structural basis of sirtuin substrate affinity. Biochemistry. 2006 Jun 20;45(24):7511-21. PMID:16768447 doi:10.1021/bi0526332
|
