View source for 7vik


==Asymmetric unit of cryoEM structure of bacteriophage lambda capsid at 3.76 Angstrom==
<StructureSection load='7vik' size='340' side='right'caption='[[7vik]], [[Resolution|resolution]] 3.76&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7vik]] is a 14 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_virus_Lambda Escherichia virus Lambda]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7VIK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7VIK 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]] 3.76&#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=7vik FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7vik OCA], [https://pdbe.org/7vik PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7vik RCSB], [https://www.ebi.ac.uk/pdbsum/7vik PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7vik ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/DECO_LAMBD DECO_LAMBD] Stabilizes the expansion of the capsid head shell after genome packaging. The packaging of viral genome in the procapsid triggers a dramatic reconfiguration of the capsid shell, expanding from roughly 50nm to 60nm while the capsid thickness decreases. 415 capsid decoration protein molecules cooperatively bind the expanded capsid, thereby stabilizing the mature capsid shell.<ref>PMID:18786402</ref> <ref>PMID:21821043</ref> <ref>PMID:8411174</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Bacteriophage lambda is an excellent model system for studying capsid assembly of double-stranded DNA (dsDNA) bacteriophages, some dsDNA archaeal viruses, and herpesviruses. HK97 fold coat proteins initially assemble into a precursor capsid (procapsid) and subsequent genome packaging triggers morphological expansion of the shell. An auxiliary protein is required to stabilize the expanded capsid structure. To investigate the capsid maturation mechanism, we determined the cryo-electron microscopy structures of the bacteriophage lambda procapsid and mature capsid at 3.88 A and 3.76 A resolution, respectively. Besides primarily rigid body movements of common features of the major capsid protein gpE, large-scale structural rearrangements of other domains occur simultaneously. Assembly of intercapsomers within the procapsid is facilitated by layer-stacking effects at 3-fold vertices. Upon conformational expansion of the capsid shell, the missing top layer is fulfilled by cementing the gpD protein against the internal pressure of DNA packaging. Our structures illuminate the assembly mechanisms of dsDNA viruses.

Structural basis of bacteriophage lambda capsid maturation.,Wang C, Zeng J, Wang J Structure. 2022 Jan 4. pii: S0969-2126(21)00461-5. doi:, 10.1016/j.str.2021.12.009. PMID:35026161<ref>PMID:35026161</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7vik" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia virus Lambda]]
[[Category: Large Structures]]
[[Category: Wang JW]]