PMID- 22496238 OWN - NLM STAT- MEDLINE DCOM- 20120809 LR - 20240417 IS - 1098-5514 (Electronic) IS - 0022-538X (Print) IS - 0022-538X (Linking) VI - 86 IP - 12 DP - 2012 Jun TI - Structural insight into the unique properties of adeno-associated virus serotype 9. PG - 6947-58 LID - 10.1128/JVI.07232-11 [doi] AB - Adeno-associated virus serotype 9 (AAV9) has enhanced capsid-associated tropism for cardiac muscle and the ability to cross the blood-brain barrier compared to other AAV serotypes. To help identify the structural features facilitating these properties, we have used cryo-electron microscopy (cryo-EM) and three-dimensional image reconstruction (cryo-reconstruction) and X-ray crystallography to determine the structure of the AAV9 capsid at 9.7- and 2.8-A resolutions, respectively. The AAV9 capsid exhibits the surface topology conserved in all AAVs: depressions at each icosahedral two-fold symmetry axis and surrounding each five-fold axis, three separate protrusions surrounding each three-fold axis, and a channel at each five-fold axis. The AAV9 viral protein (VP) has a conserved core structure, consisting of an eight-stranded, beta-barrel motif and the alphaA helix, which are present in all parvovirus structures. The AAV9 VP differs in nine variable surface regions (VR-I to -IX) compared to AAV4, but at only three (VR-I, VR-II, and VR-IV) compared to AAV2 and AAV8. VR-I differences modify the raised region of the capsid surface between the two-fold and five-fold depressions. The VR-IV difference produces smaller three-fold protrusions in AAV9 that are less "pointed" than AAV2 and AAV8. Significantly, residues in the AAV9 VRs have been identified as important determinants of cellular tropism and transduction and dictate its antigenic diversity from AAV2. Hence, the AAV9 VRs likely confer the unique infection phenotypes of this serotype. FAU - DiMattia, Michael A AU - DiMattia MA AD - Department of Biochemistry and Molecular Biology, Center for Structural Biology, McKnight Brain Institute, College of Medicine, University of Florida, Gainesville, Florida, USA. FAU - Nam, Hyun-Joo AU - Nam HJ FAU - Van Vliet, Kim AU - Van Vliet K FAU - Mitchell, Matthew AU - Mitchell M FAU - Bennett, Antonette AU - Bennett A FAU - Gurda, Brittney L AU - Gurda BL FAU - McKenna, Robert AU - McKenna R FAU - Olson, Norman H AU - Olson NH FAU - Sinkovits, Robert S AU - Sinkovits RS FAU - Potter, Mark AU - Potter M FAU - Byrne, Barry J AU - Byrne BJ FAU - Aslanidi, George AU - Aslanidi G FAU - Zolotukhin, Sergei AU - Zolotukhin S FAU - Muzyczka, Nicholas AU - Muzyczka N FAU - Baker, Timothy S AU - Baker TS FAU - Agbandje-McKenna, Mavis AU - Agbandje-McKenna M LA - eng SI - PDB/3UX1 GR - R37 GM033050/GM/NIGMS NIH HHS/United States GR - R01 GM082946/GM/NIGMS NIH HHS/United States GR - P01 HL59412/HL/NHLBI NIH HHS/United States GR - P41 RR001646/RR/NCRR NIH HHS/United States GR - DMR0225180/GM/NIGMS NIH HHS/United States GR - P41 RR001081/RR/NCRR NIH HHS/United States GR - S10 RR020016/RR/NCRR NIH HHS/United States GR - R37 GM-33050/GM/NIGMS NIH HHS/United States GR - 1S10 RR020016/RR/NCRR NIH HHS/United States GR - P01 HL059412/HL/NHLBI NIH HHS/United States GR - RR-01646/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. DEP - 20120411 PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Capsid Proteins) SB - IM MH - Capsid/*chemistry/metabolism MH - Capsid Proteins/chemistry/genetics/metabolism MH - Cryoelectron Microscopy MH - Crystallography, X-Ray MH - Dependovirus/*chemistry/classification/genetics/metabolism MH - Imaging, Three-Dimensional PMC - PMC3393551 EDAT- 2012/04/13 06:00 MHDA- 2012/08/10 06:00 PMCR- 2012/12/01 CRDT- 2012/04/13 06:00 PHST- 2012/04/13 06:00 [entrez] PHST- 2012/04/13 06:00 [pubmed] PHST- 2012/08/10 06:00 [medline] PHST- 2012/12/01 00:00 [pmc-release] AID - JVI.07232-11 [pii] AID - 07232-11 [pii] AID - 10.1128/JVI.07232-11 [doi] PST - ppublish SO - J Virol. 2012 Jun;86(12):6947-58. doi: 10.1128/JVI.07232-11. Epub 2012 Apr 11.