The asymmetric unit contains a dimer of the NS3-NS4a complex. This is only the protease domain of NS3 and a peptide of NS4a. This dimeric structure is the result of the soultion structure of the domain. The full length NS3 contains a 3-domain helicase as well and would not have the same dimeric interfaces.
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要素
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タンパク質 / タンパク質・ペプチド , 2種, 4分子 ACBD
#1: タンパク質
HCVNS3Protease
分子量: 21233.225 Da / 分子数: 2 / 断片: Protease domain, UNP residues 1027-1207 / 由来タイプ: 組換発現 詳細: T7 epitope (MASMTGGQQMG)followed by HCV NS3 residues 1-181 and the His-tag (SGHHHHHH) 由来: (組換発現) Hepatitis C virus subtype 1a (C型肝炎ウイルス) 株: H77 Strain of genotype 1a / 遺伝子: NS3 / 発現宿主: Escherichia coli (大腸菌) / 株 (発現宿主): BL21(DE3) / 参照: UniProt: Q9ELS8
#2: タンパク質・ペプチド
HCVNS4apeptide
分子量: 2394.039 Da / 分子数: 2 / 断片: UNP residues 1678-1696 / Mutation: C28S / 由来タイプ: 合成 詳細: Peptides were synthesized using Fmoc solid-phase chemistry on an ABI 431 synthesizer (Foster City, CA). Preloaded 2-chlorotrityl chloride resin or Wang resin was used for the solid phase ...詳細: Peptides were synthesized using Fmoc solid-phase chemistry on an ABI 431 synthesizer (Foster City, CA). Preloaded 2-chlorotrityl chloride resin or Wang resin was used for the solid phase assembly of NS4A activator peptide. The sequence of the peptide was Lys-Lys-Gly-Ser-Val-Val-Ile-Val-Gly-Arg-Ile-Ile-Leu-Ser-Gly-Arg-Pro-Ala-Ile-Val-Pro-Lys-Lys-OH. Trifunctional residue sidechain protecting groups included tert-butyl for Ser, tert-butoxycarbonyl for Lys, and 2,2,4,6,7-pentamethyldihydrobenzofuran-5-sulfonyl for Arg. Cleavage and sidechain deprotection was accomplished using 92.5% trifluoroacetic acid, with 2.5% each of water, ethanedithiol and triisopropylsilane for 2 hours. The peptide was purified by reversed phase HPLC. The peptide molecular weight was confirmed by electrospray ionization mass spectrometry. 参照: UniProt: Q9ELS8
温度: 285 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 5.6 詳細: Crystallization was performed by the vapor diffusion method using hanging drops (4 L protein solution mixed with 4 L (0.75 - 1.00) M NaCl - 0.1 M MES - 0.1 M Na/K PO4, pH 5.6 - 6.2) suspended ...詳細: Crystallization was performed by the vapor diffusion method using hanging drops (4 L protein solution mixed with 4 L (0.75 - 1.00) M NaCl - 0.1 M MES - 0.1 M Na/K PO4, pH 5.6 - 6.2) suspended over 1 mL reservoir solutions of (1.25 - 1.50) M NaCl - 0.1 M MES - 0.1 M Na/K PO4 - 5 mM -mercaptoethanol, pH 5.6-6.2. The trays were set at 4oC for 5-7 days to control nucleation, followed by incubation for 3 weeks at 12oC to maximize crystal growth. , VAPOR DIFFUSION, HANGING DROP, temperature 277, then 285K