- EMDB-5594: Cryo-EM structure of short shafted adenovirus type 5 complexed wi... -
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基本情報
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データベース: EMDB / ID: EMD-5594
タイトル
Cryo-EM structure of short shafted adenovirus type 5 complexed with factor VII
マップデータ
Reconstruction of adenovirus type 5 modified to have a short shafted fiber with coagulation factor VII bound
試料
試料: Human zymogen coagulation factor VII bound to human adenovirus type 5 from species C. The virus has been modified to contain a short shafted fiber.
ウイルス: Human adenovirus 5 (ヒトアデノウイルス)
キーワード
Adenovirus / coagulation factor VII / innate immunity
ジャーナル: J Virol / 年: 2013 タイトル: Coagulation factor binding orientation and dimerization may influence infectivity of adenovirus-coagulation factor complexes. 著者: Eric E Irons / Justin W Flatt / Konstantin Doronin / Tara L Fox / Mauro Acchione / Phoebe L Stewart / Dmitry M Shayakhmetov / 要旨: Adenoviruses (Ads) are promising vectors for therapeutic interventions in humans. When injected into the bloodstream, Ad vectors can bind several vitamin K-dependent blood coagulation factors, which ...Adenoviruses (Ads) are promising vectors for therapeutic interventions in humans. When injected into the bloodstream, Ad vectors can bind several vitamin K-dependent blood coagulation factors, which contributes to virus sequestration in the liver by facilitating transduction of hepatocytes. Although both coagulation factors FVII and FX bind the hexon protein of human Ad serotype 5 (HAdv5) with a very high affinity, only FX appears to play a role in mediating Ad-hepatocyte transduction in vivo. To understand the discrepancy between efficacy of FVII binding to hexon and its apparently poor capacity for supporting virus cell entry, we analyzed the HAdv5-FVII complex by using high-resolution cryo-electron microscopy (cryo-EM) followed by molecular dynamic flexible fitting (MDFF) simulations. The results indicate that although hexon amino acids T423, E424, and T425, identified earlier as critical for FX binding, are also involved in mediating binding of FVII, the FVII GLA domain sits within the surface-exposed hexon trimer depression in a different orientation from that found for FX. Furthermore, we found that when bound to hexon, two proximal FVII molecules interact via their serine protease (SP) domains and bury potential heparan sulfate proteoglycan (HSPG) receptor binding residues within the dimer interface. In contrast, earlier cryo-EM studies of the Ad-FX interaction showed no evidence of dimer formation. Dimerization of FVII bound to Ad may be a contributing mechanistic factor for the differential infectivity of Ad-FX and Ad-FVII complexes, despite high-affinity binding of both these coagulation factors to the virus.
全体 : Human zymogen coagulation factor VII bound to human adenovirus ty...
全体
名称: Human zymogen coagulation factor VII bound to human adenovirus type 5 from species C. The virus has been modified to contain a short shafted fiber.
要素
試料: Human zymogen coagulation factor VII bound to human adenovirus type 5 from species C. The virus has been modified to contain a short shafted fiber.
ウイルス: Human adenovirus 5 (ヒトアデノウイルス)
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超分子 #1000: Human zymogen coagulation factor VII bound to human adenovirus ty...
超分子
名称: Human zymogen coagulation factor VII bound to human adenovirus type 5 from species C. The virus has been modified to contain a short shafted fiber. タイプ: sample / ID: 1000 集合状態: 240 factor VII molecules bind to one Ad virion Number unique components: 2
分子量
理論値: 164 MDa
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超分子 #1: Human adenovirus 5
超分子
名称: Human adenovirus 5 / タイプ: virus / ID: 1 / NCBI-ID: 28285 / 生物種: Human adenovirus 5 / データベース: NCBI / ウイルスタイプ: VIRION / ウイルス・単離状態: OTHER / ウイルス・エンベロープ: No / ウイルス・中空状態: No