Structures of capsid and capsid-associated tegument complex inside the Epstein-Barr virus.
Amino Acid Sequence
Capsid
/ chemistry
Capsid Proteins
/ chemistry
Cryoelectron Microscopy
Epstein-Barr Virus Infections
/ virology
Herpesvirus 4, Human
/ physiology
Humans
Imaging, Three-Dimensional
Models, Molecular
Protein Subunits
Structure-Activity Relationship
Virion
/ ultrastructure
Virus Assembly
Journal
Nature microbiology
ISSN: 2058-5276
Titre abrégé: Nat Microbiol
Pays: England
ID NLM: 101674869
Informations de publication
Date de publication:
10 2020
10 2020
Historique:
received:
02
01
2020
accepted:
19
06
2020
pubmed:
29
7
2020
medline:
22
12
2020
entrez:
29
7
2020
Statut:
ppublish
Résumé
As the first discovered human cancer virus, Epstein-Barr virus (EBV) causes Burkitt's lymphoma and nasopharyngeal carcinoma. Isolating virions for determining high-resolution structures has been hindered by latency-a hallmark of EBV infection-and atomic structures are thus available only for recombinantly expressed EBV proteins. In the present study, by symmetry relaxation and subparticle reconstruction, we have determined near-atomic-resolution structures of the EBV capsid with an asymmetrically attached DNA-translocating portal and capsid-associated tegument complexes from cryogenic electron microscopy images of just 2,048 EBV virions obtained by chemical induction. The resulting atomic models reveal structural plasticity among the 20 conformers of the major capsid protein, 2 conformers of the small capsid protein (SCP), 4 conformers of the triplex monomer proteins and 2 conformers of the triplex dimer proteins. Plasticity reaches the greatest level at the capsid-tegument interfaces involving SCP and capsid-associated tegument complexes (CATC): SCPs crown pentons/hexons and mediate tegument protein binding, and CATCs bind and rotate all five periportal triplexes, but notably only about one peri-penton triplex. These results offer insights into the EBV capsid assembly and a mechanism for recruiting cell-regulating factors into the tegument compartment as 'cargoes', and should inform future anti-EBV strategies.
Identifiants
pubmed: 32719506
doi: 10.1038/s41564-020-0758-1
pii: 10.1038/s41564-020-0758-1
pmc: PMC7546529
mid: NIHMS1630658
doi:
Substances chimiques
Capsid Proteins
0
Protein Subunits
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
1285-1298Subventions
Organisme : NIAID NIH HHS
ID : R01 AI094386
Pays : United States
Organisme : NIH HHS
ID : S10 OD018111
Pays : United States
Organisme : NIGMS NIH HHS
ID : U24 GM116792
Pays : United States
Organisme : NIDCR NIH HHS
ID : R01 DE025567
Pays : United States
Organisme : NCRR NIH HHS
ID : S10 RR023057
Pays : United States
Organisme : NIDCR NIH HHS
ID : R01 DE028583
Pays : United States
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