View source for 8v8b


==Structure of 80alpha portal protein expressed in E. coli==
<StructureSection load='8v8b' size='340' side='right'caption='[[8v8b]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8v8b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_phage_80alpha Staphylococcus phage 80alpha]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8V8B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8V8B 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]] 2.4&#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=8v8b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8v8b OCA], [https://pdbe.org/8v8b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8v8b RCSB], [https://www.ebi.ac.uk/pdbsum/8v8b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8v8b ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Staphylococcus aureus is an important human pathogen, and the prevalence of antibiotic resistance is a major public health concern. The evolution of pathogenicity and resistance in S. aureus often involves acquisition of mobile genetic elements (MGEs). Bacteriophages play an especially important role, since transduction represents the main mechanism for horizontal gene transfer. S. aureus pathogenicity islands (SaPIs), including SaPI1, are MGEs that carry genes encoding virulence factors, and are mobilized at high frequency through interactions with specific "helper" bacteriophages, such as 80alpha, leading to packaging of the SaPI genomes into virions made from structural proteins supplied by the helper. Among these structural proteins is the portal protein, which forms a ring-like portal at a fivefold vertex of the capsid, through which the DNA is packaged during virion assembly and ejected upon infection of the host. We have used high-resolution cryo-electron microscopy to determine structures of the S. aureus bacteriophage 80alpha portal itself, produced by overexpression, and in situ in the empty and full SaPI1 virions, and show how the portal interacts with the capsid. These structures provide a basis for understanding portal and capsid assembly and the conformational changes that occur upon DNA packaging and ejection.

Structure of the Portal Complex from Staphylococcus aureus Pathogenicity Island 1 Transducing Particles In Situ and In Isolation.,Mukherjee A, Kizziah JL, Hawkins NC, Nasef MO, Parker LK, Dokland T J Mol Biol. 2023 Dec 21;436(4):168415. doi: 10.1016/j.jmb.2023.168415. PMID:38135177<ref>PMID:38135177</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8v8b" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Staphylococcus phage 80alpha]]
[[Category: Dokland T]]
[[Category: Kizziah JL]]
[[Category: Mukherjee A]]