6zig

Topological model of the p2 virion baseplate in activated conformation (closed Tal trimer)Topological model of the p2 virion baseplate in activated conformation (closed Tal trimer)

Structural highlights

6zig is a 33 chain structure with sequence from Lactococcus virus P2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 42.2Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

RBP_BPLP2 Binds to the host phosphopolysaccharides at the onset of infection. Upon activation by calcium, the receptor binding proteins change their conformation, presenting their binding sites to the host, and a channel opens at the bottom of the baseplate for DNA ejection.^[1] ^[2]

References

↑ Sciara G, Bebeacua C, Bron P, Tremblay D, Ortiz-Lombardia M, Lichiere J, van Heel M, Campanacci V, Moineau S, Cambillau C. Structure of lactococcal phage p2 baseplate and its mechanism of activation. Proc Natl Acad Sci U S A. 2010 Mar 29. PMID:20351260
↑ Bebeacua C, Tremblay D, Farenc C, Chapot-Chartier MP, Sadovskaya I, van Heel M, Veesler D, Moineau S, Cambillau C. Structure, adsorption to host, and infection mechanism of virulent lactococcal phage p2. J Virol. 2013 Nov;87(22):12302-12. PMID:24027307 doi:10.1128/JVI.02033-13

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OCA

[1] Sciara G, Bebeacua C, Bron P, Tremblay D, Ortiz-Lombardia M, Lichiere J, van Heel M, Campanacci V, Moineau S, Cambillau C. Structure of lactococcal phage p2 baseplate and its mechanism of activation. Proc Natl Acad Sci U S A. 2010 Mar 29. PMID:20351260

[2] Bebeacua C, Tremblay D, Farenc C, Chapot-Chartier MP, Sadovskaya I, van Heel M, Veesler D, Moineau S, Cambillau C. Structure, adsorption to host, and infection mechanism of virulent lactococcal phage p2. J Virol. 2013 Nov;87(22):12302-12. PMID:24027307 doi:10.1128/JVI.02033-13

[1]

[2]