View source for 9sii


==Supercoiling bacterial archaellum filament from L. aerophila==
<StructureSection load='9sii' size='340' side='right'caption='[[9sii]], [[Resolution|resolution]] 3.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9sii]] is a 52 chain structure with sequence from [https://en.wikipedia.org/wiki/Litorilinea_aerophila Litorilinea aerophila]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9SII OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9SII FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.4&#8491;</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=9sii FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9sii OCA], [https://pdbe.org/9sii PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9sii RCSB], [https://www.ebi.ac.uk/pdbsum/9sii PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9sii ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A540VDN8_9CHLR A0A540VDN8_9CHLR] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Motility in Archaea is driven by the archaellum, a rotary ATP-driven machinery unrelated to the bacterial flagellum. To date, archaella have been described exclusively in archaea; however, recent work reported archaellum genes in bacterial strains of the SAR202 clade (Chloroflexota). Here, using MacSyFinder, we show that bona fide archaellum gene clusters are widespread in several members of the Chloroflexota. Analysis of archaellum-encoding loci and Alphafold3-predicted structures show similarity to the archaellum machinery. Using cryo electron microscopy single-particle analysis, we solved the structure of the bacterial archaellum from Litorilinea aerophila to 2.7 A. We also show the expression and assembly of this machinery in bacteria and its function in swimming motility. Finally, a phylogenomic analysis revealed two horizontal gene transfer events from euryarchaeal members to Chloroflexota. In summary, our study shows that a functional and assembled archaellum machinery can be exchanged between the two prokaryotic domains.

Structure of a functional archaellum in Bacteria of the Chloroflexota phylum.,Sivabalasarma S, Taib N, Mollat CL, Joest M, Steimle S, Gribaldo S, Albers SV Nat Microbiol. 2025 Oct;10(10):2412-2424. doi: 10.1038/s41564-025-02110-8. Epub , 2025 Sep 17. PMID:40962902<ref>PMID:40962902</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9sii" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Litorilinea aerophila]]
[[Category: Albers S-V]]
[[Category: Gribaldo S]]
[[Category: Joest M]]
[[Category: Mollat CL]]
[[Category: Sivabalasarma S]]
[[Category: Steimle S]]
[[Category: Taib N]]