Product Specifications:
Item# 7005 : Recombinant Human APOBEC3G (CEM15, E.coli)
Concentration: See vial
Mass/vial: 100ug
Diluent: PBS, 30% Glycerol 0.1% Sarcosyl
Purity: >95%
Stabilizer: None
Preservative: None
Storage: -75°C
Physical State: Frozen Liquid
Stability: 6 Months at -85°C
Aplications: Vif Binding Assays.
Description: Produced in the E.coli Expression System as a hexa-His fusion protein. Thrombin cleavage site at N-terminus may be used to derive CEM15 free of hexa-His sequence.
Approximate mol.wt: 44kD.
Purification: This protein is purified by preparative SDS-PAGE, reduced, to >95% purity as determined by SDS-PAGE, reduced.
Specificity: This protein binds to anti-CEM15 murine monoclonal antibodies and rabbit polyclonal antibodies as determined by Elisa and Western Elisa.
Biological Activity: Binds HIV-1 vif as determined by ELISA and Western Blot, and complexes with native vif in HIV infected cells.
Application and Instructions for use
Research articles related to Recombinant Human APOBEC3G
APOBEC3G is a cytidine deaminase with two homologous domains and restricts retroelements and HIV-1. APOBEC3G deaminates single-stranded DNAs via its C-terminal domain, whereas the N-terminal domain is considered non-catalytic. Although APOBEC3G is known to bind RNAs, APOBEC3G-mediated RNA editing has not been observed. We recently discovered RNA editing by the single-domain enzyme APOBEC3A in innate immune cells. To determine if APOBEC3G is capable of RNA editing, we transiently expressed APOBEC3G in the HEK293T cell line and performed transcriptome-wide RNA sequencing. We show that APOBEC3G causes site-specific C-to-U editing of mRNAs from over 600 genes. The edited cytidines are often flanked by inverted repeats, but are largely distinct from those deaminated by APOBEC3A. We verified protein-recoding RNA editing of selected genes including several that are known to be involved in HIV-1 infectivity. APOBEC3G co-purifies with highly edited mRNA substrates. We find that conserved catalytic residues in both cytidine deaminase domains are required for RNA editing. Our findings demonstrate the novel RNA editing function of APOBEC3G and suggest a role for the N-terminal domain in RNA editing. Recombinant human APOBEC3G contains highly-edited mRNAs
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全能干细胞具有能发育成各种组织器官的完整个体的潜能的细胞,如胚胎干细胞。多能干细胞没有发育成完整个体的能力,但具有分化出多种细胞组织的能力,主要在器官再生、修复和疾病治疗方面极具应用价值,多能干细胞还在研究当中,过去认为多能干细胞只能从人胚胎中获得,现在已能用体细胞转化为多能干细胞。
单能干细胞只能向一种类型或密切相关的两种类型的细胞分化,如上皮组织基底层的干细胞、肌肉中的成肌细胞。
心肌梗死(Myocardialinfarction,MI)特征是心脏供血减少和心肌功能减弱,成人心脏的自我再生能力有限,使得心肌梗死的状况雪上加霜。由于干细胞具有自我更新复制能力和分化潜能,因此干细胞移植是使心脏组织再生和增强心脏功能的新的方法。最近的研究表明脂肪组织来源干细胞(ADSCs),即从脂肪组织分离的多能干细胞,具有广泛的分化潜能,可分化为心肌细胞。现分享一篇DNA转染(Entranster-H4000)与脂肪来源干细胞和心肌梗死研究的文献,以供参考。
Real-timetrackingofADIposetissue-derivedstemcellswithinjectablescaffoldsintheinfarctedheart.pdf(866.54k)
(2) 与此相反,Dr. Gearheart从终止妊娠的胎儿组织中分离出多能性干细胞。捐献者自行决定了终止妊娠,从他们那儿获得了知情同意书后,Dr. Gearheart从原本要发育成睾丸或卵巢的胎儿部位取得细胞。尽管Dr. Thomson 实验室和Dr. Gearheart实验室使用的细胞系来源不同,但发育成熟的细胞看起来非常相似。
体细胞核转移(SCNT)是得到多能性干细胞的另一种途径。在SCNT的动物研究中,研究者将一个正常的动物卵细胞去除细胞核(含染色体的细胞结构)。存留在卵细胞内的物质含营养成分和对胚胎发育非常重要的能量物质。而后,在非常精细调控的实验室条件下,将单个体细胞——除卵细胞或精子细胞之外的任一种细胞——与除去核卵细胞放在一起,使两者相融合。融合细胞以及其子细胞具有发育成一个完整个体的潜能,因此是全能性的。正如图I所示,这些全能性细胞不久将形成胚囊,从理论上来说,可利用胚囊的内细胞群来建立多能性干细胞系。实际上,任何一种可生成人类胚囊细胞的方法都有可能成为人体多能性干细胞的来源。
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