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<div style="color: black !important; font-family: 'Times New Roman', SimSun, serif !important, line-height:1.5;"> == Protein(RuCHMO/GDH) Conjugation to DNA Origami == === Methods === === Conjugation === *''' Proteins containing 6x Histidine at the C terminus reacted, with the chemical DBCO-PEG4-Bis-sulfone(DPBS) for 4 h at room temperature. The bis-sulfone group reacts with the Histidines at the C terminus of the protein, and then an azide modified oligonucleotide is conjugated to the protein by click chemistry between the azide- and the DBCO-group.''' === Incubation === *'''conjugation: DNA Origami = 20:1, and incubate in a PCR machine with a temperature ramp starting from 1 h at 37 ℃ follow by 14 h at 22 ℃, and immediately after incubation the nanopatterns are stored at 4 ℃.''' === Oligonucleotide Sequence === *'''sequence(RuCHMO):CTCTCCTTCTTCCCTTTCTTT''' *'''Sequence(GDH):TTCGACAGCATGAACATCAGC''' === Protein === *'''RuCHMO: 65.45 KDa''' *'''GDH: 35 KDa''' === Purification === *''' 30 kDa MWCO 0.5 ml Amicon centrifugal filters (Milli-pore)''' === electro-phoresis === {| class="wikitable" |+ Sample |- ! Reagent ! Sequence |- | DBCO-PEG4-Bis-sulfone | |- | azide modified oligonucleotide | CTCTCCTTCTTCCCTTTCTTT |- | azide modified oligonucleotide | TTCGACAGCATGAACATCAGC |} <div style="color: black !important; font-family: 'Times New Roman', SimSun, serif !important, line-height:1.5;"> == Protocol (版本 1.0) == ===<big>''' 一、酶-核酸杂交体的制备 '''</big>=== * '''<big><span style="color:red;">GDH-Oligo</span></big> <div style="color: black !important; font-family: 'Times New Roman', SimSun, serif !important, line-height:1.5;"> === 1. GDH 制备 === 取 '''1.4 mg GDH''' 溶解于 '''2 mL 1×PBS''' 中。 === 2. 稀释 GDH(样品液) === {| class="wikitable" style="text-align:center; width:80%" ! 样品 !! 原样品浓度 !! 终样品浓度 !! 加入量 !! 总体积 |- |'''<span style="color:red;"> GDH </span>'''|| 0.7 mg/mL || 0.175 mg/mL || 25 μL || 100 μL |} === 3. 溶解 DBCO-PEG4-Bis-Sulfone 于 DMF(N,N-二甲基甲酰胺) 中(100 mM) === 取''' DBCO 2 mg''' 溶解'''DMF 20 ul''' 中 === 4. 稀释 DBCO(样品液) === {| class="wikitable" style="text-align:center; width:80%" ! 样品 !! 原样品浓度 !! 终样品浓度 !! 加入量 !! 总体积 |- | DBCO || 100 mM || 20 mM || 2 μL || 20 μL |} === 5. 向 GDH 样品液中加入 DBCO,并在室温下孵育 4 h === {| class="wikitable" style="text-align:center; width:90%" ! 样品 !! 最终浓度 !! 分子量 !! 总摩尔量 !! Eq DBCO !! DBCO 摩尔量 !! DBCO 加入量 !! 总体积 |- | GDH || 5 μM || 35 kDa || 0.5 nMol || 20 Eq || 10 nMol || 1 μL || 100 μL |} === 6. 使用 10 kDa 超滤管超滤去除游离 DBCO === === 7. Oligo === {| class="wikitable" style="text-align:center; width:80%" ! Name !! 序列 !! bp !! 修饰 !! Nmol/管 !! buffer (μL) !! 浓度 (mM) |- | S1 ||CTCTCCTTCTTCCCTTTCTTT|| 21 || 5'Azide || 123.53 || 123.53 || 1 |- | S2 ||TTCGACAGCATGAACATCAGC|| 21 || 5'Azide || 97.51 || 97.51 || 1 |} === 7. 加入 Oligo,并在 37 ℃ 下孵育 4 h === {| class="wikitable" style="text-align:center; width:90%" ! 样品 !! 总摩尔量 !! Eq Oligo !! Oligo 摩尔量 !! S1 加入量 !! 总体积 |- | GDH || 0.5 nMol || 20 Eq || 10 nMol || 10 μL || 100 μL |} *'''<big><span style="color:red;"> RuCHMO-Oligo</span></big> === 1. RuCHMO 制备=== {| class="wikitable" style="text-align:center;width:80%" |- ! 样品 !! 初始浓度 !! 取样量 !! 最终浓度 !! 最终体积 |- | '''<span style="color:red;">RuCHMO</span>''' || 28.2 μM || 100 μL || 5 μM || 564 μl |} * 最终样品 分为 '''4份''' 每份 '''140 ul''' === 2. 向 100 ul RuCHMO 样品液中加入 DBCO,'''4℃冰箱中冰浴孵育 4 h''' === {| class="wikitable" style="text-align:center; width:90%" ! 样品 !! 最终浓度 !! 分子量 !! 总摩尔量 !! Eq DBCO !! DBCO 摩尔量 !! DBCO 加入量 !! 总体积 |- | RuCHMO || 5 μM || 65.45 kDa || 0.5 nMol || 20 Eq || 10 nMol || 1 μL || 100 μL |} === 3. 4 ℃, 12000 转, 超滤 20 min === === 4. 加入 Oligo,并在 4 ℃冰箱 冰浴下孵育 过夜 === {| class="wikitable" style="text-align:center; width:90%" ! 样品 !! 总摩尔量 !! Eq Oligo !! Oligo 摩尔量 !! S1 加入量 !! 总体积 |- | RuCHMO || 0.5 nMol || 20 Eq || 10 nMol || 10 μL || 100 μL |} ===<big> '''二、Nativepage''' </big>=== [[File:reference_of_gel_concentration.jpg|thumb|600px|Reference]] ===1. 制胶 === {| class="wikitable" |- ! 成分 ! 体积/质量 |- | 30% ACR: Bis(29:1) | 4.8 ml |- | Tris 1.5M | 2 ml |- | 10% APS | 80 ul |- | TEMED | 8 ul |- | '''总''' | '''8 ml''' |} '''注:''' 浓度'''(ACr)'''计算公式为 (30% × 4.8) / 8 *'''1.5mol/L Tris (ph8.8):36.3g Tris /200 ml UP 水''' *''' 10%APS:0.5 g APS / 5 ml UP 水,分装冻存 ===2. 缓冲液配置 === * '''10X TBE (1L)''' {| class="wikitable" |- ! 成分 ! 质量 |- | Tris | 54 g |- | EDTA-Na₂ | 3.72 g |- | 硼酸 | 27.5 g |} * 调节 PH 至 '''8.3''' === 3.上样液:蛋白缓冲液 = 4:1 === === 4. 染色 === *切取胶体放置于含 '''10 ml 考马斯亮蓝'''培养皿中, '''37℃ 摇床振摇 3-4 h''' *待颜色稳定后,吸出考马斯亮蓝溶液,可循环使用 2-3 次,用''' UP 水反复清洗至基底原色'''
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