National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
K99AI173544
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM116884
米国
Howard Hughes Medical Institute (HHMI)
GT12053
米国
National Institutes of Health/Office of the Director
S10 OD025009
米国
National Institutes of Health/Office of the Director
S10 OD019995
米国
National Institutes of Health/Office of the Director
S10OD032467
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
U24GM129547
米国
Academia Sinica (Taiwan)
AS-IDR-110-06
台湾
引用
ジャーナル: Cell / 年: 2025 タイトル: Structure and infection dynamics of mycobacteriophage Bxb1. 著者: Krista G Freeman / Sudipta Mondal / Lourriel S Macale / Jennifer Podgorski / Simon J White / Benjamin H Silva / Valery Ortiz / Alexis Huet / Ronelito J Perez / Joemark T Narsico / Meng-Chiao ...著者: Krista G Freeman / Sudipta Mondal / Lourriel S Macale / Jennifer Podgorski / Simon J White / Benjamin H Silva / Valery Ortiz / Alexis Huet / Ronelito J Perez / Joemark T Narsico / Meng-Chiao Ho / Deborah Jacobs-Sera / Todd L Lowary / James F Conway / Donghyun Park / Graham F Hatfull / 要旨: Mycobacteriophage Bxb1 is a well-characterized virus of Mycobacterium smegmatis with double-stranded DNA and a long, flexible tail. Mycobacteriophages show considerable potential as therapies for ...Mycobacteriophage Bxb1 is a well-characterized virus of Mycobacterium smegmatis with double-stranded DNA and a long, flexible tail. Mycobacteriophages show considerable potential as therapies for Mycobacterium infections, but little is known about the structural details of these phages or how they bind to and traverse the complex Mycobacterium cell wall. Here, we report the complete structure and atomic model of phage Bxb1, including the arrangement of immunodominant domains of both the capsid and tail tube subunits, as well as the assembly of the protein subunits in the tail-tip complex. The structure contains protein assemblies with 3-, 5-, 6-, and 12-fold symmetries, which interact to satisfy several symmetry mismatches. Cryoelectron tomography of phage particles bound to M. smegmatis reveals the structural transitions that occur for free phage particles to bind to the cell surface and navigate through the cell wall to enable DNA transfer into the cytoplasm.
名称: Mycobacterium phage Bxb1 / タイプ: virus / ID: 1 / 親要素: 0 / 含まれる分子: #1-#2 詳細: Portal and connector complex of Bxb1, containing five protein subunit types. This is a composite map, and related entries for consensus and locally refined maps are noted. NCBI-ID: 2902907 / 生物種: Mycobacterium phage Bxb1 / Sci species strain: Mycobacterium phage Bxb1 / ウイルスタイプ: VIRION / ウイルス・単離状態: SPECIES / ウイルス・エンベロープ: No / ウイルス・中空状態: No
宿主
生物種: Mycolicibacterium smegmatis MC2 155 (バクテリア)
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実験情報
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構造解析
手法
クライオ電子顕微鏡法
解析
単粒子再構成法
試料の集合状態
particle
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試料調製
濃度
10 mg/mL
緩衝液
pH: 7.5 構成要素:
濃度
式
名称
10.0 mM
C4H11NO3
Tris
1.0 mM
MgSO4
Magnesium sulfate
68.44 mM
NaCl
Sodium chloride
1.0 mM
CaCl2
Calcium chloride
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 283.15 K / 装置: FEI VITROBOT MARK IV
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
撮影
フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 30.0 e/Å2