8a2s - Revision history

OCA at 08:55, 4 March 2026

2026-03-04T08:55:34Z

← Older revision		Revision as of 08:55, 4 March 2026
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	== Structural highlights ==		== Structural highlights ==
	<table><tr><td colspan='2'>[[8a2s]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8A2S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8A2S FirstGlance]. <br>		<table><tr><td colspan='2'>[[8a2s]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8A2S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8A2S FirstGlance]. <br>
	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=HIC:4-METHYL-HISTIDINE'>HIC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>		</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models\|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution\|Resolution]] 2.22Å</td></tr>
			<tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=HIC:4-METHYL-HISTIDINE'>HIC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></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=8a2s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8a2s OCA], [https://pdbe.org/8a2s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8a2s RCSB], [https://www.ebi.ac.uk/pdbsum/8a2s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8a2s 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=8a2s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8a2s OCA], [https://pdbe.org/8a2s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8a2s RCSB], [https://www.ebi.ac.uk/pdbsum/8a2s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8a2s ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
	[https://www.uniprot.org/uniprot/ACTS_RABIT ACTS_RABIT] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.		[https://www.uniprot.org/uniprot/ACTS_RABIT ACTS_RABIT] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.
	~~<div style="background-color:#fffaf0;">~~
	~~== Publication Abstract from PubMed ==~~
	The dynamic turnover of actin filaments (F-actin) controls cellular motility in eukaryotes and is coupled to changes in the F-actin nucleotide state<sup>1-3</sup>. It remains unclear how F-actin hydrolyses ATP and subsequently undergoes subtle conformational rearrangements that ultimately lead to filament depolymerization by actin-binding proteins. Here we present cryo-electron microscopy structures of F-actin in all nucleotide states, polymerized in the presence of Mg<sup>2+</sup> or Ca<sup>2+</sup> at approximately 2.2 A resolution. The structures show that actin polymerization induces the relocation of water molecules in the nucleotide-binding pocket, activating one of them for the nucleophilic attack of ATP. Unexpectedly, the back door for the subsequent release of inorganic phosphate (P<sub>i</sub>) is closed in all structures, indicating that P<sub>i</sub> release occurs transiently. The small changes in the nucleotide-binding pocket after ATP hydrolysis and P<sub>i</sub> release are sensed by a key amino acid, amplified and transmitted to the filament periphery. Furthermore, differences in the positions of water molecules in the nucleotide-binding pocket explain why Ca<sup>2+</sup>-actin shows slower polymerization rates than Mg<sup>2+</sup>-actin. Our work elucidates the solvent-driven rearrangements that govern actin filament assembly and aging and lays the foundation for the rational design of drugs and small molecules for imaging and therapeutic applications.

	Structural basis of actin filament assembly and aging.,Oosterheert W, Klink BU, Belyy A, Pospich S, Raunser S Nature. 2022 Nov;611(7935):374-379. doi: 10.1038/s41586-022-05241-8. Epub 2022, Oct 26. PMID:36289337<ref>PMID:36289337</ref>

	~~From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>~~
	~~</div>~~
	~~<div class="pdbe-citations 8a2s" style="background-color:#fffaf0;"></div>~~
	~~== References ==~~
	~~<references/>~~
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>

OCA at 20:29, 16 November 2022

2022-11-16T20:29:13Z

← Older revision		Revision as of 20:29, 16 November 2022
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	==Cryo-EM structure of F-actin in the Mg2+-ADP-Pi nucleotide state.==		==Cryo-EM structure of F-actin in the Mg2+-ADP-Pi nucleotide state.==
	<StructureSection load='8a2s' size='340' side='right'caption='[[8a2s]]' scene=''>		<StructureSection load='8a2s' size='340' side='right'caption='[[8a2s]], [[Resolution\|resolution]] 2.22Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
	<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8A2S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8A2S FirstGlance]. <br>		<table><tr><td colspan='2'>[[8a2s]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8A2S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8A2S FirstGlance]. <br>
	</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=8a2s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8a2s OCA], [https://pdbe.org/8a2s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8a2s RCSB], [https://www.ebi.ac.uk/pdbsum/8a2s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8a2s ProSAT]</span></td></tr>		</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=HIC:4-METHYL-HISTIDINE'>HIC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></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=8a2s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8a2s OCA], [https://pdbe.org/8a2s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8a2s RCSB], [https://www.ebi.ac.uk/pdbsum/8a2s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8a2s ProSAT]</span></td></tr>
	</table>		</table>
			== Function ==
			[https://www.uniprot.org/uniprot/ACTS_RABIT ACTS_RABIT] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.
			<div style="background-color:#fffaf0;">
			== Publication Abstract from PubMed ==
			The dynamic turnover of actin filaments (F-actin) controls cellular motility in eukaryotes and is coupled to changes in the F-actin nucleotide state<sup>1-3</sup>. It remains unclear how F-actin hydrolyses ATP and subsequently undergoes subtle conformational rearrangements that ultimately lead to filament depolymerization by actin-binding proteins. Here we present cryo-electron microscopy structures of F-actin in all nucleotide states, polymerized in the presence of Mg<sup>2+</sup> or Ca<sup>2+</sup> at approximately 2.2 A resolution. The structures show that actin polymerization induces the relocation of water molecules in the nucleotide-binding pocket, activating one of them for the nucleophilic attack of ATP. Unexpectedly, the back door for the subsequent release of inorganic phosphate (P<sub>i</sub>) is closed in all structures, indicating that P<sub>i</sub> release occurs transiently. The small changes in the nucleotide-binding pocket after ATP hydrolysis and P<sub>i</sub> release are sensed by a key amino acid, amplified and transmitted to the filament periphery. Furthermore, differences in the positions of water molecules in the nucleotide-binding pocket explain why Ca<sup>2+</sup>-actin shows slower polymerization rates than Mg<sup>2+</sup>-actin. Our work elucidates the solvent-driven rearrangements that govern actin filament assembly and aging and lays the foundation for the rational design of drugs and small molecules for imaging and therapeutic applications.

			Structural basis of actin filament assembly and aging.,Oosterheert W, Klink BU, Belyy A, Pospich S, Raunser S Nature. 2022 Nov;611(7935):374-379. doi: 10.1038/s41586-022-05241-8. Epub 2022, Oct 26. PMID:36289337<ref>PMID:36289337</ref>

			From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
			</div>
			<div class="pdbe-citations 8a2s" style="background-color:#fffaf0;"></div>
			== References ==
			<references/>
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>
	[[Category: Large Structures]]		[[Category: Large Structures]]
			[[Category: Oryctolagus cuniculus]]
	[[Category: Belyy A]]		[[Category: Belyy A]]
	[[Category: Klink BU]]		[[Category: Klink BU]]

OCA at 05:03, 10 August 2022

2022-08-10T05:03:33Z

← Older revision		Revision as of 05:03, 10 August 2022
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	~~'''Unreleased structure'''~~

	~~The entry 8a2s is ON HOLD until Paper Publication~~		==Cryo-EM structure of F-actin in the Mg2+-ADP-Pi nucleotide state.==
			<StructureSection load='8a2s' size='340' side='right'caption='[[8a2s]]' scene=''>
	~~Authors: Oosterheert, W., Klink, B.U., Belyy, A., Pospich, S., Raunser, S.~~		== Structural highlights ==
			<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8A2S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8A2S FirstGlance]. <br>
	~~Description:~~ Cryo-EM structure of F-actin in the Mg2+-ADP-Pi nucleotide state.		</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=8a2s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8a2s OCA], [https://pdbe.org/8a2s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8a2s RCSB], [https://www.ebi.ac.uk/pdbsum/8a2s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8a2s ProSAT]</span></td></tr>
	[[Category: ~~Unreleased~~ Structures]]		</table>
	[[Category: ~~Pospich, S~~]]		__TOC__
	[[Category: ~~Oosterheert, W~~]]		</StructureSection>
	[[Category: ~~Klink, B.U~~]]		[[Category: Large Structures]]
	[[Category: ~~Belyy, A~~]]		[[Category: Belyy A]]
	[[Category: Raunser, S]]		[[Category: Klink BU]]
			[[Category: Oosterheert W]]
			[[Category: Pospich S]]
			[[Category: Raunser S]]

OCA at 04:05, 13 July 2022

2022-07-13T04:05:47Z

← Older revision		Revision as of 04:05, 13 July 2022
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	'''Unreleased structure'''		'''Unreleased structure'''

	The entry 8a2s is ON HOLD		The entry 8a2s is ON HOLD until Paper Publication

	Authors: Oosterheert, W., Klink, B.U., Belyy, A., Pospich, S., Raunser, S.		Authors: Oosterheert, W., Klink, B.U., Belyy, A., Pospich, S., Raunser, S.

OCA: Protected "8a2s" [edit=sysop:move=sysop]

2022-06-15T04:06:05Z

Protected "8a2s" [edit=sysop:move=sysop]

← Older revision	Revision as of 04:06, 15 June 2022
(No difference)

OCA: New page: '''Unreleased structure''' The entry 8a2s is ON HOLD Authors: Oosterheert, W., Klink, B.U., Belyy, A., Pospich, S., Raunser, S. Description: Cryo-EM structure of F-actin in the Mg2+-AD...

2022-06-15T04:06:04Z

New page: '''Unreleased structure''' The entry 8a2s is ON HOLD Authors: Oosterheert, W., Klink, B.U., Belyy, A., Pospich, S., Raunser, S. Description: Cryo-EM structure of F-actin in the Mg2+-AD...

New page

'''Unreleased structure'''

The entry 8a2s is ON HOLD

Authors: Oosterheert, W., Klink, B.U., Belyy, A., Pospich, S., Raunser, S.

Description: Cryo-EM structure of F-actin in the Mg2+-ADP-Pi nucleotide state.
[[Category: Unreleased Structures]]
[[Category: Pospich, S]]
[[Category: Oosterheert, W]]
[[Category: Klink, B.U]]
[[Category: Belyy, A]]
[[Category: Raunser, S]]