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| - | [[Image:1do2.gif|left|200px]]<br /><applet load="1do2" size="450" color="white" frame="true" align="right" spinBox="true" | |
| - | caption="1do2, resolution 4.00Å" /> | |
| - | '''TRIGONAL CRYSTAL FORM OF HEAT SHOCK LOCUS U (HSLU) FROM ESCHERICHIA COLI'''<br /> | |
| | | | |
| - | ==Overview== | + | ==TRIGONAL CRYSTAL FORM OF HEAT SHOCK LOCUS U (HSLU) FROM ESCHERICHIA COLI== |
| - | The degradation of cytoplasmic proteins is an ATP-dependent process., Substrates are targeted to a single soluble protease, the 26S proteasome, in eukaryotes and to a number of unrelated proteases in prokaryotes. A, surprising link emerged with the discovery of the ATP-dependent protease, HslVU (heat shock locus VU) in Escherichia coli. Its protease component, HslV shares approximately 20% sequence similarity and a conserved fold, with 20S proteasome beta-subunits. HslU is a member of the Hsp100 (Clp), family of ATPases. Here we report the crystal structures of free HslU and, an 820,000 relative molecular mass complex of HslU and HslV-the first, structure of a complete set of components of an ATP-dependent protease., HslV and HslU display sixfold symmetry, ruling out mechanisms of protease, activation that require a symmetry mismatch between the two components., Instead, there is conformational flexibility and domain motion in HslU and, a localized order-disorder transition in HslV. Individual subunits of HslU, contain two globular domains in relative orientations that correlate with, nucleotide bound and unbound states. They are surprisingly similar to, their counterparts in N-ethylmaleimide-sensitive fusion protein, the, prototype of an AAA-ATPase. A third, mostly alpha-helical domain in HslU, mediates the contact with HslV and may be the structural equivalent of the, amino-terminal domains in proteasomal AAA-ATPases.
| + | <StructureSection load='1do2' size='340' side='right'caption='[[1do2]], [[Resolution|resolution]] 4.00Å' scene=''> |
| - | | + | == Structural highlights == |
| - | ==About this Structure== | + | <table><tr><td colspan='2'>[[1do2]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DO2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DO2 FirstGlance]. <br> |
| - | 1DO2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with ANP as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1DO2 OCA].
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 4Å</td></tr> |
| - | | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene></td></tr> |
| - | ==Reference== | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1do2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1do2 OCA], [https://pdbe.org/1do2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1do2 RCSB], [https://www.ebi.ac.uk/pdbsum/1do2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1do2 ProSAT]</span></td></tr> |
| - | The structures of HsIU and the ATP-dependent protease HsIU-HsIV., Bochtler M, Hartmann C, Song HK, Bourenkov GP, Bartunik HD, Huber R, Nature. 2000 Feb 17;403(6771):800-5. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10693812 10693812] | + | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/HSLU_ECOLI HSLU_ECOLI] ATPase subunit of a proteasome-like degradation complex; this subunit has chaperone activity. The binding of ATP and its subsequent hydrolysis by HslU are essential for unfolding of protein substrates subsequently hydrolyzed by HslV. HslU recognizes the N-terminal part of its protein substrates and unfolds these before they are guided to HslV for hydrolysis.<ref>PMID:8662828</ref> <ref>PMID:8650174</ref> <ref>PMID:9288941</ref> <ref>PMID:9393683</ref> <ref>PMID:10452560</ref> <ref>PMID:10419524</ref> <ref>PMID:15696175</ref> |
| | + | == Evolutionary Conservation == |
| | + | [[Image:Consurf_key_small.gif|200px|right]] |
| | + | Check<jmol> |
| | + | <jmolCheckbox> |
| | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/do/1do2_consurf.spt"</scriptWhenChecked> |
| | + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> |
| | + | <text>to colour the structure by Evolutionary Conservation</text> |
| | + | </jmolCheckbox> |
| | + | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1do2 ConSurf]. |
| | + | <div style="clear:both"></div> |
| | + | == References == |
| | + | <references/> |
| | + | __TOC__ |
| | + | </StructureSection> |
| | [[Category: Escherichia coli]] | | [[Category: Escherichia coli]] |
| - | [[Category: Single protein]] | + | [[Category: Large Structures]] |
| - | [[Category: Bartunik, H.D.]] | + | [[Category: Bartunik HD]] |
| - | [[Category: Bochtler, M.]] | + | [[Category: Bochtler M]] |
| - | [[Category: Bourenkov, G.P.]] | + | [[Category: Bourenkov GP]] |
| - | [[Category: Hartmann, C.]] | + | [[Category: Hartmann C]] |
| - | [[Category: Song, H.K.]] | + | [[Category: Song HK]] |
| - | [[Category: ANP]]
| + | |
| - | [[Category: aaa-atpase]]
| + | |
| - | [[Category: atp-dependent proteolysis]]
| + | |
| - | [[Category: clpy]]
| + | |
| - | [[Category: hslu]]
| + | |
| - | [[Category: proteasome]]
| + | |
| - | | + | |
| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 13:26:10 2007''
| + | |
| Structural highlights
Function
HSLU_ECOLI ATPase subunit of a proteasome-like degradation complex; this subunit has chaperone activity. The binding of ATP and its subsequent hydrolysis by HslU are essential for unfolding of protein substrates subsequently hydrolyzed by HslV. HslU recognizes the N-terminal part of its protein substrates and unfolds these before they are guided to HslV for hydrolysis.[1] [2] [3] [4] [5] [6] [7]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
References
- ↑ Yoo SJ, Seol JH, Shin DH, Rohrwild M, Kang MS, Tanaka K, Goldberg AL, Chung CH. Purification and characterization of the heat shock proteins HslV and HslU that form a new ATP-dependent protease in Escherichia coli. J Biol Chem. 1996 Jun 14;271(24):14035-40. PMID:8662828
- ↑ Rohrwild M, Coux O, Huang HC, Moerschell RP, Yoo SJ, Seol JH, Chung CH, Goldberg AL. HslV-HslU: A novel ATP-dependent protease complex in Escherichia coli related to the eukaryotic proteasome. Proc Natl Acad Sci U S A. 1996 Jun 11;93(12):5808-13. PMID:8650174
- ↑ Seol JH, Yoo SJ, Shin DH, Shim YK, Kang MS, Goldberg AL, Chung CH. The heat-shock protein HslVU from Escherichia coli is a protein-activated ATPase as well as an ATP-dependent proteinase. Eur J Biochem. 1997 Aug 1;247(3):1143-50. PMID:9288941
- ↑ Kanemori M, Nishihara K, Yanagi H, Yura T. Synergistic roles of HslVU and other ATP-dependent proteases in controlling in vivo turnover of sigma32 and abnormal proteins in Escherichia coli. J Bacteriol. 1997 Dec;179(23):7219-25. PMID:9393683
- ↑ Seong IS, Oh JY, Yoo SJ, Seol JH, Chung CH. ATP-dependent degradation of SulA, a cell division inhibitor, by the HslVU protease in Escherichia coli. FEBS Lett. 1999 Jul 30;456(1):211-4. PMID:10452560
- ↑ Kanemori M, Yanagi H, Yura T. Marked instability of the sigma(32) heat shock transcription factor at high temperature. Implications for heat shock regulation. J Biol Chem. 1999 Jul 30;274(31):22002-7. PMID:10419524
- ↑ Burton RE, Baker TA, Sauer RT. Nucleotide-dependent substrate recognition by the AAA+ HslUV protease. Nat Struct Mol Biol. 2005 Mar;12(3):245-51. Epub 2005 Feb 6. PMID:15696175 doi:10.1038/nsmb898
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