EMDB/PDB/SASBDBから引用されている文献のデータベース

キーワード
構造解析手法	All X線回折 NMR 電子顕微鏡小角散乱中性子線回折線維回折粉末回折赤外分光 EPR FRET 理論モデルハイブリッド
著者・登録者
ジャーナル
IF	>30 >20 >10 >5 all

タイトル	Immature HIV-1 assembles from Gag dimers leaving partial hexamers at lattice edges as potential substrates for proteolytic maturation.
ジャーナル・号・ページ	Proc Natl Acad Sci U S A, Vol. 118, Issue 3, Year 2021
掲載日	2021年1月19日
著者	Aaron Tan / Alexander J Pak / Dustin R Morado / Gregory A Voth / John A G Briggs /
PubMed 要旨	The CA (capsid) domain of immature HIV-1 Gag and the adjacent spacer peptide 1 (SP1) play a key role in viral assembly by forming a lattice of CA hexamers, which adapts to viral envelope curvature by ...The CA (capsid) domain of immature HIV-1 Gag and the adjacent spacer peptide 1 (SP1) play a key role in viral assembly by forming a lattice of CA hexamers, which adapts to viral envelope curvature by incorporating small lattice defects and a large gap at the site of budding. This lattice is stabilized by intrahexameric and interhexameric CA-CA interactions, which are important in regulating viral assembly and maturation. We applied subtomogram averaging and classification to determine the oligomerization state of CA at lattice edges and found that CA forms partial hexamers. These structures reveal the network of interactions formed by CA-SP1 at the lattice edge. We also performed atomistic molecular dynamics simulations of CA-CA interactions stabilizing the immature lattice and partial CA-SP1 helical bundles. Free energy calculations reveal increased propensity for helix-to-coil transitions in partial hexamers compared to complete six-helix bundles. Taken together, these results suggest that the CA dimer is the basic unit of lattice assembly, partial hexamers exist at lattice edges, these are in a helix-coil dynamic equilibrium, and partial helical bundles are more likely to unfold, representing potential sites for HIV-1 maturation initiation.
リンク	Proc Natl Acad Sci U S A / PubMed:33397805 / PubMed Central
手法	EM (サブトモグラム平均)
解像度	9.2 - 16.2 Å
構造データ	EMDB-12147: Immature HIV-1 Gag partial hexamer with 1 Gag subunit missing, obtained by wedge-masked difference map PCA classification 手法: EM (サブトモグラム平均) / 解像度: 11.8 Å EMDB-12148: Immature HIV-1 Gag partial hexamer with 2 Gag subunits missing, obtained by wedge-masked difference map PCA classification 手法: EM (サブトモグラム平均) / 解像度: 11.2 Å EMDB-12149: Immature HIV-1 Gag partial hexamer with 3 Gag subunits missing, obtained by wedge-masked difference map PCA classification 手法: EM (サブトモグラム平均) / 解像度: 16.2 Å EMDB-12150: Immature HIV-1 Gag partial hexamer with 1 Gag subunit missing, obtained by multi-reference classification 手法: EM (サブトモグラム平均) / 解像度: 10.2 Å EMDB-12151: Immature HIV-1 Gag partial hexamer with 2 Gag subunits missing, obtained by multi-reference classification 手法: EM (サブトモグラム平均) / 解像度: 10.9 Å EMDB-12152: Immature HIV-1 Gag partial hexamer with 3 Gag subunits missing, obtained by multi-reference classification 手法: EM (サブトモグラム平均) / 解像度: 11.7 Å EMDB-12153: Immature HIV-1 Gag complete hexamer obtained by multi-reference classification 手法: EM (サブトモグラム平均) / 解像度: 9.2 Å