ジャーナル: Hum Gene Ther / 年: 2014 タイトル: Human full-length coagulation factor X and a GLA domain-derived 40-mer polypeptide bind to different regions of the adenovirus serotype 5 hexon capsomer. 著者: Sudir Sumarheni / Saw See Hong / Véronique Josserand / Jean-Luc Coll / Pierre Boulanger / Guy Schoehn / Pascal Fender / 要旨: The interaction of human adenovirus (HAdV)-C5 and many other adenoviruses with blood coagulation factors (e.g., human factor X, FX) involves the binding of their GLA domain to the hexon capsomers, ...The interaction of human adenovirus (HAdV)-C5 and many other adenoviruses with blood coagulation factors (e.g., human factor X, FX) involves the binding of their GLA domain to the hexon capsomers, resulting in high levels of hepatotropism and potential hepatotoxicity. In this study, we tested the possibility of preventing these undesirable effects by using a GLA-mimicking peptide as a competitor. An FX GLA domain-derived, 40-mer polypeptide carrying 12 carboxyglutamate residues was synthesized (GLA(mim)). Surface plasmon resistance (SPR) analysis showed that GLA(mim) reacted with free and capsid-embedded hexon with a nanomolar affinity. Unexpectedly, GLA(mim) failed to compete with FX for hexon binding, and instead significantly increased the formation of FX-hexon or FX-adenovirion complexes. This observation was confirmed by in vitro cell transduction experiments using HAdV-C5-Luciferase vector (HAdV5-Luc), as preincubation of HAdV5-Luc with GLA(mim) before FX addition resulted in a higher transgene expression compared with FX alone. HAdV-C5 virions complexed with GLA(mim) were analyzed by cryoelectron microscopy. Image reconstruction demonstrated the bona fide hexon-GLA(mim) interaction, as for the full-length FX, although with considerable differences in stoichiometry and relative location on the hexon capsomer. Three extra densities were found at the periphery of each hexon, whereas one single FX molecule occupied the central cavity of the hexon trimeric capsomer. A refined analysis indicated that each extra density is found at the expected location of one highly variable loop 1 of the hexon, involved in scavenger receptor recognition. HAdV5-Luc complexed with a bifunctional GLA(mim)RGD peptide showed a lesser hepatotropism, compared with control HAdV5-Luc alone, and efficiently targeted αβ-integrin-overexpressing tumor cells in an in vivo mouse tumor model. Collectively, our findings open new perspectives in the design of adenoviral vectors for biotherapy.
ダウンロード / ファイル: emd_2568.map.gz / 形式: CCP4 / 大きさ: 58.2 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Only 1/8 of the map to see the hexons
ボクセルのサイズ
X=Y=Z: 2.26 Å
密度
表面レベル
登録者による: 160.0 / ムービー #1: 160
最小 - 最大
-1139.0 - 1311.0
平均 (標準偏差)
7.57692862 (±161.530014039999998)
対称性
空間群: 1
詳細
EMDB XML:
マップ形状
Axis order
X
Y
Z
Origin
-223
-223
-223
サイズ
250
250
250
Spacing
250
250
250
セル
A=B=C: 565.0 Å α=β=γ: 90.0 °
CCP4マップ ヘッダ情報:
mode
Image stored as Reals
Å/pix. X/Y/Z
2.26
2.26
2.26
M x/y/z
250
250
250
origin x/y/z
0.000
0.000
0.000
length x/y/z
565.000
565.000
565.000
α/β/γ
90.000
90.000
90.000
start NX/NY/NZ
-207
-207
-206
NX/NY/NZ
414
414
414
MAP C/R/S
1
2
3
start NC/NR/NS
-223
-223
-223
NC/NR/NS
250
250
250
D min/max/mean
-1139.000
1311.000
7.577
-
添付データ
-
試料の構成要素
-
全体 : HAdV-C5 virions complexed with GLAmim
全体
名称: HAdV-C5 virions complexed with GLAmim
要素
試料: HAdV-C5 virions complexed with GLAmim
ウイルス: Human adenovirus 5 (ヒトアデノウイルス)
リガンド: GLAmim peptide
-
超分子 #1000: HAdV-C5 virions complexed with GLAmim
超分子
名称: HAdV-C5 virions complexed with GLAmim / タイプ: sample / ID: 1000 / Number unique components: 2
分子量
実験値: 150 MDa / 理論値: 150 MDa
-
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 / ウイルスタイプ: VIRION / ウイルス・単離状態: SEROTYPE / ウイルス・エンベロープ: No / ウイルス・中空状態: No / Sci species serotype: 5
宿主
生物種: Homo sapiens (ヒト) / 別称: VERTEBRATES
分子量
実験値: 150 MDa / 理論値: 150 MDa
ウイルス殻
Shell ID: 1 / 直径: 1000 Å / T番号(三角分割数): 25
-
分子 #1: GLAmim peptide
分子
名称: GLAmim peptide / タイプ: ligand / ID: 1 詳細: GLAmim peptide contains 12 gamma-carboxyglutamate residues and carries a biotinyl group at its C-terminal end. コピー数: 1 / 組換発現: No
由来(天然)
生物種: synthetic construct (人工物)
-
実験情報
-
構造解析
手法
ネガティブ染色法, 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
-
試料調製
濃度
1 mg/mL
緩衝液
pH: 7.4 / 詳細: 10mM Hepes buffer 2 mm CaCl2
染色
タイプ: NEGATIVE / 詳細: cryo
グリッド
詳細: Quantifoil R2/1 holey grid
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / 装置: FEI VITROBOT MARK IV / 手法: Blot for 2 seconds before plunging