6Q1F image
Entry Detail
PDB ID:
6Q1F
EMDB ID:
EMD-20557
Keywords:
VIRUS
Title:
Atomic structure of the Human Herpesvirus 6B Capsid and Capsid-Associated Tegument Complexes
Biological Source:
Source Organism:
Human herpesvirus 6B (strain Z29)
PDB Version:
Deposition Date:
2019-08-03
Release Date:
2019-12-11
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
9.00 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
6Q1F validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Triplex capsid protein 1
Chain IDs:SA (auth: 5), TA (auth: S), UA (auth: T), VA (auth: U), WA (auth: V)
Chain Length:299
Number of Molecules:5
Biological Source:Human herpesvirus 6B (strain Z29)
Protein Blast
Polymer Type:polypeptide(L)
Description:Triplex capsid protein 2
Chain IDs:XA (auth: 6), YA (auth: W), ZA (auth: X), AB (auth: Y), BB (auth: Z), CB (auth: 7), DB (auth: a), EB (auth: b), FB (auth: c), GB (auth: d)
Chain Length:296
Number of Molecules:10
Biological Source:Human herpesvirus 6B (strain Z29)
UniProt ID:Q9QJ27 Pfam ID:PF01802
Protein Blast
Polymer Type:polypeptide(L)
Description:Major capsid protein
Chain IDs:A, B, C, D, E, F, G, H, I, J (auth: q), K (auth: r), L (auth: s), M (auth: t), N (auth: u), O (auth: v), P (auth: w)
Chain Length:296
Number of Molecules:16
Biological Source:Human herpesvirus 6B (strain Z29)
UniProt ID:Q9QJ26 Pfam ID:PF03122
Polymer Type:polypeptide(L)
Description:Small capsomere-interacting protein
Chain IDs:CA (auth: J), DA (auth: K), EA (auth: L), FA (auth: M), GA (auth: N), HA (auth: O), IA (auth: P), JA (auth: Q), KA (auth: R), LA (auth: x), MA (auth: y), NA (auth: z), OA (auth: 1), PA (auth: 2), QA (auth: 3), RA (auth: 4)
Chain Length:89
Number of Molecules:16
Biological Source:Human herpesvirus 6B (strain Z29)
Polymer Type:polypeptide(L)
Description:Large structural phosphoprotein
Chain IDs:Q (auth: e), R (auth: f), S (auth: g), T (auth: h), U (auth: i), V (auth: j), W (auth: k), X (auth: l), Y (auth: m), Z (auth: n), AA (auth: o), BA (auth: p)
Chain Length:1345
Number of Molecules:12
Biological Source:Human herpesvirus 6B (strain Z29)
Ligand Molecules
NA
Primary Citation
Atomic structure of the human herpesvirus 6B capsid and capsid-associated tegument complexes.
Nat Commun 10 5346 5346 (2019)
PMID: 31767868 DOI: 10.1038/s41467-019-13064-x

Abstact

Human herpesvirus 6B (HHV-6B) belongs to the β-herpesvirus subfamily of the Herpesviridae. To understand capsid assembly and capsid-tegument interactions, here we report atomic structures of HHV-6B capsid and capsid-associated tegument complex (CATC) obtained by cryoEM and sub-particle reconstruction. Compared to other β-herpesviruses, HHV-6B exhibits high similarity in capsid structure but organizational differences in its CATC (pU11 tetramer). 180 "VΛ"-shaped CATCs are observed in HHV-6B, distinguishing from the 255 "Λ"-shaped dimeric CATCs observed in murine cytomegalovirus and the 310 "Δ"-shaped CATCs in human cytomegalovirus. This trend in CATC quantity correlates with the increasing genomes sizes of these β-herpesviruses. Incompatible distances revealed by the atomic structures rationalize the lack of CATC's binding to triplexes Ta, Tc, and Tf in HHV-6B. Our results offer insights into HHV-6B capsid assembly and the roles of its tegument proteins, including not only the β-herpesvirus-specific pU11 and pU14, but also those conserved across all subfamilies of Herpesviridae.

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Primary Citation of related structures
6Q1F