- EMDB-34887: F8-A22-E4 complex of MPXV in trimeric form -
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基本情報
登録情報
データベース: EMDB / ID: EMD-34887
タイトル
F8-A22-E4 complex of MPXV in trimeric form
マップデータ
試料
複合体: F8-A22-E4 complex of MPXV in trimeric form
複合体: DNA polymerase processivity factor component A20
タンパク質・ペプチド: DNA polymerase processivity factor component A20
複合体: DNA polymerase
タンパク質・ペプチド: DNA polymerase
複合体: E4R
タンパク質・ペプチド: E4R
キーワード
MPXV / complex / RECOMBINATION / REPLICATION
機能・相同性
機能・相同性情報
uracil DNA N-glycosylase activity / viral DNA genome replication / DNA recombination / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA replication / DNA repair / nucleotide binding / DNA binding 類似検索 - 分子機能
DNA-directed DNA polymerase, family B, viral insert domain / DNA polymerase B exonuclease, N-terminal / DNA polymerase family B viral insert / DNA polymerase family B exonuclease domain, N-terminal / Chordopoxvirus A20R / Chordopoxvirus A20R protein / Uracil-DNA glycosylase, active site / Uracil-DNA glycosylase signature. / Uracil-DNA glycosylase-like domain superfamily / : ...DNA-directed DNA polymerase, family B, viral insert domain / DNA polymerase B exonuclease, N-terminal / DNA polymerase family B viral insert / DNA polymerase family B exonuclease domain, N-terminal / Chordopoxvirus A20R / Chordopoxvirus A20R protein / Uracil-DNA glycosylase, active site / Uracil-DNA glycosylase signature. / Uracil-DNA glycosylase-like domain superfamily / : / DNA polymerase family B signature. / DNA-directed DNA polymerase, family B, multifunctional domain / DNA-directed DNA polymerase, family B, conserved site / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily 類似検索 - ドメイン・相同性
DNA polymerase / DNA polymerase processivity factor / Uracil-DNA glycosylase 類似検索 - 構成要素
ジャーナル: Sci Adv / 年: 2023 タイトル: Structural basis for the assembly of the DNA polymerase holoenzyme from a monkeypox virus variant. 著者: Yaning Li / Yaping Shen / Ziwei Hu / Renhong Yan / 要旨: The ongoing global pandemic caused by a variant of the monkeypox (or mpox) virus (MPXV) has prompted widespread concern. The MPXV DNA polymerase holoenzyme, consisting of F8, A22, and E4, is vital ...The ongoing global pandemic caused by a variant of the monkeypox (or mpox) virus (MPXV) has prompted widespread concern. The MPXV DNA polymerase holoenzyme, consisting of F8, A22, and E4, is vital for replicating the viral genome and represents a crucial target for the development of antiviral drugs. However, the assembly and working mechanism for the DNA polymerase holoenzyme of MPXV remains elusive. Here, we present the cryo-electron microscopy (cryo-EM) structure of the DNA polymerase holoenzyme at an overall resolution of 3.5 Å. Unexpectedly, the holoenzyme is assembled as a dimer of heterotrimers, of which the extra interface between the thumb domain of F8 and A22 shows a clash between A22 and substrate DNA, suggesting an autoinhibition state. Addition of exogenous double-stranded DNA shifts the hexamer into trimer exposing DNA binding sites, potentially representing a more active state. Our findings provide crucial steps toward developing targeted antiviral therapies for MPXV and related viruses.