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

Documents

U2OS-CRISPR-TPR-SNAP

Cell line · Product number 300667

U2OS-CRISPR-TPR-SNAP is a genome-edited human osteosarcoma cell line derived from U2OS cells in which the endogenous TPR (Translocated Promoter Region) ge...

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01General information

Description

U2OS-CRISPR-TPR-SNAP是一种基因组编辑的人类骨肉瘤细胞系,源自U2OS细胞。其中内源性TPR(转位启动子区域)基因通过CRISPR/Cas9技术进行修饰,以编码一个同框SNAP标签。 TPR是一种大型螺旋卷曲核孔蛋白,定位于核孔复合体(NPC)核质侧的核篮结构。通过在TPR内源性基因座添加标签,融合蛋白在天然调控机制下表达,既保持生理表达水平,又维持其在核篮结构中的正常整合。

SNAP标签使TPR能够在活细胞或固定细胞中与苄基鸟嘌呤荧光底物发生共价标记,实现高度特异且稳定的可视化。 在U2OS-CRISPR-TPR-SNAP细胞中,标记的TPR于核膜呈现特征性点状环状分布,与NPC相关核篮结构相吻合。该系统特别适用于定量荧光显微镜、超分辨成像、脉冲追踪标记及核篮组装与更新的动态研究。U2OS细胞扁平形态与大核特性,为核膜相关结构的高分辨成像提供便利。

TPR在mRNA输出、核运输调控、核周染色质组织及基因组空间布局中发挥关键作用。该蛋白还参与核运输相关亚区室的形成,并介导异染色质从核孔相关区域的排斥。 U2OS-CRISPR-TPR-SNAP模型在生理相关条件下,为解析核篮结构与动态特性、探究核质间运输机制、研究核膜相关染色质相互作用提供了理想平台。

Tissue
骨质
Disease
骨肉瘤
Metastatic site
原发肿瘤部位(骨)
Applications
核篮子生物学;TPR介导的mRNA输出;核质转运调控;核周区域的染色质组织;核转运亚区室;基因组空间组织;超分辨率显微镜;SNAP脉冲-追踪标记法;异染色质从孔相关区域的排斥

02Classification

Organism
Human
Sex
Female
Growth properties
Adherent
GMO status
GMO-S1
GMO status details
GMO-S1: This human osteosarcoma cell line (U2OS-CRISPR-TPR-SNAP) contains a CRISPR-engineered TPR-SNAP fusion enabling fluorescent and chemical labeling of the TPR nuclear basket protein. The construct is stably integrated. 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-TPR-SNAP(Cytion 目录号 300667)
NCBI TaxID
9606
Depositor
艾伦伯格实验室(EMBL)

05Expression and susceptibility

Protein expression
TPR, SNAP-tag

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