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U2OS-CRISPR-SNAPf-SEH1
Tissue
骨质
Disease
骨肉瘤
Metastatic site
原发肿瘤部位(骨)

Documents

U2OS-CRISPR-SNAPf-SEH1

Cell line · Product number 300664

U2OS-CRISPR-SNAPf-SEH1 is a genome-edited human osteosarcoma cell line derived from U2OS cells in which the endogenous SEH1L (SEH1) gene has been modified...

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01General information

Description

U2OS-CRISPR-SNAPf-SEH1是一种基因组编辑的人类骨肉瘤细胞系,源自U2OS细胞。该细胞系通过CRISPR/Cas9技术对内源性SEH1L(SEH1)基因进行修饰,使其编码一个同框SNAPf标签。 SEH1是Y复合体(又称NUP107-160复合体)的组成部分,该复合体作为核孔复合体(NPC)的核心结构单元,参与孔架组装与稳定性维持。通过在内源位点插入SNAPf编码序列,标记的SEH1蛋白在天然调控机制下表达,既保持生理表达水平,又最大限度减少对核孔组成的干扰。

SNAPf标签是经工程改造的SNAP标签快速反应变体,可共价结合苄基鸟嘌呤偶联底物,实现活细胞或固定细胞中选择性稳定的荧光标记。在U2OS-CRISPR-SNAPf-SEH1细胞中,融合蛋白以NPC分布特有的点状模式定位于核膜。 由于标记发生在内源性蛋白水平,该系统特别适用于定量荧光显微镜、超分辨成像及单粒子追踪分析,可深入解析核孔复合体的组织结构与化学计量比。U2OS细胞扁平形态与大核特征进一步促进了核膜结构的高分辨率可视化。

SEH1参与核孔复合体生物合成,并被证实与有丝分裂期间着丝粒相关过程相关。因此,该细胞系为研究细胞周期依赖性核孔组装与解聚、孔架结构内Y复合体的空间组织、以及SEH1在核膜与有丝分裂着丝粒上的潜在双重作用提供了强大平台。 U2OS-CRISPR-SNAPf-SEH1细胞系可在生理相关表达条件下,实现核孔结构与动态机制的研究。

Tissue
骨质
Disease
骨肉瘤
Metastatic site
原发肿瘤部位(骨)
Applications
Y复合物/NUP107-160复合物的生物学特性;SEH1在核孔复合体(NPC)支架组装中的作用;着丝粒相关NPC组分;NPC的化学计量比;SNAP脉冲-追踪标记法;超分辨率显微镜;NPC的生物合成;有丝分裂期间NPC的解聚与重聚

02Classification

Organism
Human
Sex
Female
Growth properties
Adherent
GMO status
GMO-S1
GMO status details
GMO-S1: This human osteosarcoma cell line (U2OS-CRISPR-SNAPf-SEH1) contains a CRISPR-mediated SNAPf-SEH1 fusion that allows selective labeling of the SEH1 nucleoporin. The modification is stably present. This classification applies only within Germany and may differ elsewhere.
Biosafety level
1

03Characteristics

Morphology
上皮样
Cell type
上皮细胞(骨肉瘤)
Doubling time
约24至36小时

04Identifiers

Citation
U2OS-CRISPR-SNAPf-SEH1(Cytion 目录号 300664)
NCBI TaxID
9606
Depositor
艾伦伯格实验室(EMBL)

05Expression and susceptibility

Protein expression
SEH1、SNAPf 标记

06Handling and culture

Culture medium
McCoys 5a,w:3.0 克/升葡萄糖,w:稳定谷氨酰胺,w:2.0 毫摩尔丙酮酸钠,w:2.2 克/升 NaHCO3(Cytion 文章编号 820200a)。
Incubation atmosphere

37°C, 5%CO2, 加湿环境。

Supplements
在培养基中添加 10% FBS、3.0 g/L 葡萄糖、稳定的谷氨酰胺、2.0 mM 丙酮酸钠、2.2 g/L NaHCO3、1% NEAA
Dissociation reagent
Accutase
Subculturing
去除粘附细胞上的旧培养基,用不含钙和镁的 PBS 冲洗。T25 烧瓶用 3-5 毫升 PBS,T75 烧瓶用 5-10 毫升。然后用 Accutase 完全覆盖细胞,T25 烧瓶用 1-2 毫升,T75 烧瓶用 2.5 毫升。让细胞在室温下孵育 8-10 分钟,使其分离。孵育后,用 10 毫升培养基轻轻混合细胞使其重悬,然后用 300xg 离心 3 分钟。弃去上清液,用新鲜培养基重悬细胞,并将其转移到已装有新鲜培养基的新烧瓶中。
Split ratio
1 至 3
Seeding density
1 至 3 × 10⁴ 个细胞/cm²
Fluid renewal
每周 2 至 3 次
Thawing and culturing
  1. Confirm that the vial remains deeply frozen upon delivery, as cells are shipped on dry ice to maintain optimal temperatures during transit.

  2. Upon receipt, either store the cryovial immediately at temperatures below -150°C to ensure the preservation of cellular integrity, or proceed to step 3 if immediate culturing is required.

  3. For immediate culturing, swiftly thaw the vial by immersing it in a 37°C water bath with clean water and an antimicrobial agent, agitating gently for 40-60 seconds until a small ice clump remains.

  4. Perform all subsequent steps under sterile conditions in a flow hood, disinfecting the cryovial with 70% ethanol before opening.

  5. Carefully open the disinfected vial and transfer the cell suspension into a 15 ml centrifuge tube containing 8 ml of room-temperature culture medium, mixing gently.

  6. Centrifuge the mixture at 300 x g for 3 minutes to separate the cells and carefully discard the supernatant containing residual freezing medium.

  7. Gently resuspend the cell pellet in 10 ml of fresh culture medium. For adherent cells, divide the suspension between two T25 culture flasks; for suspension cultures, transfer all the medium into one T25 flask to promote effective cell interaction and growth.

  8. Adhere to established subculture protocols for continued growth and maintenance of the cell line, ensuring reliable experimental outcomes.

07Quality control and cryopreservation

Sterility

使用基于 PCR 的检测方法和基于发光的支原体检测方法排除支原体污染。

为确保没有细菌、真菌或酵母菌污染,每天都要对细胞培养物进行目视检查。

Freeze medium
我们使用完全生长培养基(包括 FBS)+10% DMSO 或 CM-1(Cytion 商品目录编号 800100)作为冷冻保存培养基,以获得足够的解冻后存活率,CM-1(Cytion 商品目录编号 800100)含有优化的渗透保护剂和代谢稳定剂,可提高恢复能力并减少冷冻引起的应激。
Storage conditions

如需长期保存,可将样品瓶放入气相液氮中,温度约为 -150 至 -196 ℃。在-80 °C下保存只能作为转入液氮前的短暂过渡。

Shipping conditions

冷冻保存的细胞系用干冰装运,并用经过验证的隔热包装和足够的制冷剂在整个运输过程中保持约 -78 °C 的温度。收到货后,应立即检查容器,并立即将小瓶转移到适当的储藏室。

08Donor

Donor age
15 年
Ethnicity
高加索人