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TitleStructure of a Reptilian Adenovirus Reveals a Phage Tailspike Fold Stabilizing a Vertebrate Virus Capsid.
Journal, issue, pagesStructure, Vol. 25, Issue 10, Page 1562-11573.e5, Year 2017
Publish dateOct 3, 2017
AuthorsRosa Menéndez-Conejero / Thanh H Nguyen / Abhimanyu K Singh / Gabriela N Condezo / Rachel E Marschang / Mark J van Raaij / Carmen San Martín /
PubMed AbstractAlthough non-human adenoviruses (AdVs) might offer solutions to problems posed by human AdVs as therapeutic vectors, little is known about their basic biology. In particular, there are no structural ...Although non-human adenoviruses (AdVs) might offer solutions to problems posed by human AdVs as therapeutic vectors, little is known about their basic biology. In particular, there are no structural studies on the complete virion of any AdV with a non-mammalian host. We combine mass spectrometry, cryo-electron microscopy, and protein crystallography to characterize the composition and structure of a snake AdV (SnAdV-1, Atadenovirus genus). SnAdV-1 particles contain the genus-specific proteins LH3, p32k, and LH2, a previously unrecognized structural component. Remarkably, the cementing protein LH3 has a trimeric β helix fold typical of bacteriophage host attachment proteins. The organization of minor coat proteins differs from that in human AdVs, correlating with higher thermostability in SnAdV-1. These findings add a new piece to the intriguing puzzle of virus evolution, hint at the use of cell entry pathways different from those in human AdVs, and will help development of new, thermostable SnAdV-1-based vectors.
External linksStructure / PubMed:28943338
MethodsEM (single particle) / X-ray diffraction
Resolution2 - 10.9 Å
Structure data

EMDB-3599:
Snake Adenovirus type 1
Method: EM (single particle) / Resolution: 10.9 Å

PDB-5g5n:
Structure of the snake adenovirus 1 hexon-interlacing LH3 protein, methylmercury chloride derivative
Method: X-RAY DIFFRACTION / Resolution: 2.3 Å

PDB-5g5o:
Structure of the snake adenovirus 1 hexon-interlacing LH3 protein, native
Method: X-RAY DIFFRACTION / Resolution: 2.0 Å

Chemicals

ChemComp-GOL:
GLYCEROL

ChemComp-MMC:
METHYL MERCURY ION

ChemComp-CL:
Unknown entry

ChemComp-HOH:
WATER

ChemComp-ACT:
ACETATE ION

Source
  • snake adenovirus 1
KeywordsVIRAL PROTEIN / CAPSID PROTEIN / BETA-HELIX

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