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Entry Detail
PDB ID:
6VOY
EMDB ID:
EMD-21301
Keywords:
DNA BINDING PROTEIN/DNA
Title:
Cryo-EM structure of HTLV-1 instasome
Biological Source:
Source Organism:
Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2), Human T-cell leukemia virus type I, Homo sapiens
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2020-02-01
Release Date:
2020-07-01
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.70 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
6VOY validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:DNA-binding protein 7d
Mutations:W24A
Chain IDs:A, B, C, D
Chain Length:390
Number of Molecules:4
Biological Source:Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2), Human T-cell leukemia virus type I
UniProt ID:P39476 Pfam ID:PF02294
Protein Blast
Polymer Type:polypeptide(L)
Description:Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform
Chain IDs:E, F
Chain Length:343
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q13362 Pfam ID:PF01603
Polymer Type:polydeoxyribonucleotide
Description:DNA (5'-D(P*AP*CP*AP*CP*AP*CP*TP*TP*GP*AP*CP*TP*AP*GP*GP*GP*TP*G)-3')
Chain IDs:G (auth: I), J (auth: L)
Chain Length:49
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polydeoxyribonucleotide
Description:DNA (25-MER)
Chain IDs:H (auth: J), K (auth: M)
Chain Length:25
Number of Molecules:2
Biological Source:Human T-cell leukemia virus type I
Polymer Type:polydeoxyribonucleotide
Description:DNA (5'-D(P*AP*CP*AP*CP*AP*CP*TP*TP*GP*AP*CP*TP*AP*GP*GP*GP*TP*G)-3')
Chain IDs:I (auth: K), L (auth: N)
Chain Length:20
Number of Molecules:2
Biological Source:Human T-cell leukemia virus type I
Ligand Molecules
MG
ZN
Primary Citation
Structural basis of host protein hijacking in human T-cell leukemia virus integration.
Nat Commun 11 3121 3121 (2020)
PMID: 32561747 DOI: 10.1038/s41467-020-16963-6

Abstact

Integration of the reverse-transcribed viral DNA into host chromosomes is a critical step in the life-cycle of retroviruses, including an oncogenic delta(δ)-retrovirus human T-cell leukemia virus type-1 (HTLV-1). Retroviral integrase forms a higher order nucleoprotein assembly (intasome) to catalyze the integration reaction, in which the roles of host factors remain poorly understood. Here, we use cryo-electron microscopy to visualize the HTLV-1 intasome at 3.7-Å resolution. The structure together with functional analyses reveal that the B56γ (B'γ) subunit of an essential host enzyme, protein phosphatase 2 A (PP2A), is repurposed as an integral component of the intasome to mediate HTLV-1 integration. Our studies reveal a key host-virus interaction underlying the replication of an important human pathogen and highlight divergent integration strategies of retroviruses.

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Primary Citation of related structures
6VOY