Recombinant Human Nucleolar RNA helicase 2 (DDX21)

中文名稱：

Recombinant Human Nucleolar RNA helicase 2 (DDX21)
貨號：

CSB-EP882081HU
說明書：

MSDS Datasheet
規格：

￥1344
圖片：
(Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
其他：

產品詳情
產品評價
相關產品
靶點詳情

產品詳情

純度：

Greater than 85% as determined by SDS-PAGE.
生物活性：

Not Test
基因名：

DDX21
Uniprot No.：

Q9NR30
別名：

DEAD box protein 21;Gu-alpha;Nucleolar RNA helicase Gu;Nucleolar RNA helicase II;RH II/Gu
種屬：

Homo sapiens (Human)
蛋白長度：

Full Length
來源：

E.coli
分子量：

94.2 kDa
表達區域：

1-783aa
氨基酸序列

MPGKLRSDAGLESDTAMKKGETLRKQTEEKEKKEKPKSDKTEEIAEEEETVFPKAKQVKKKAEPSEVDMNSPKSKKAKKKEEPSQNDISPKTKSLRKKKEPIEKKVVSSKTKKVTKNEEPSEEEIDAPKPKKMKKEKEMNGETREKSPKLKNGFPHPEPDCNPSEAASEESNSEIEQEIPVEQKEGAFSNFPISEETIKLLKGRGVTFLFPIQAKTFHHVYSGKDLIAQARTGTGKTFSFAIPLIEKLHGELQDRKRGRAPQVLVLAPTRELANQVSKDFSDITKKLSVACFYGGTPYGGQFERMRNGIDILVGTPGRIKDHIQNGKLDLTKLKHVVLDEVDQMLDMGFADQVEEILSVAYKKDSEDNPQTLLFSATCPHWVFNVAKKYMKSTYEQVDLIGKKTQKTAITVEHLAIKCHWTQRAAVIGDVIRVYSGHQGRTIIFCETKKEAQELSQNSAIKQDAQSLHGDIPQKQREITLKGFRNGSFGVLVATNVAARGLDIPEVDLVIQSSPPKDVESYIHRSGRTGRAGRTGVCICFYQHKEEYQLVQVEQKAGIKFKRIGVPSATEIIKASSKDAIRLLDSVPPTAISHFKQSAEKLIEEKGAVEALAAALAHISGATSVDQRSLINSNVGFVTMILQCSIEMPNISYAWKELKEQLGEEIDSKVKGMVFLKGKLGVCFDVPTASVTEIQEKWHDSRRWQLSVATEQPELEGPREGYGGFRGQREGSRGFRGQRDGNRRFRGQREGSRGPRGQRSGGGNKSNRSQNKGQKRSFSKAFGQ
Note: The complete sequence may include tag sequence, target protein sequence, linker sequence and extra sequence that is translated with the protein sequence for the purpose(s) of secretion, stability, solubility, etc.
If the exact amino acid sequence of this recombinant protein is critical to your application, please explicitly request the full and complete sequence of this protein before ordering.
蛋白標簽：

C-terminal 6xHis-tagged
產品提供形式：

Liquid or Lyophilized powder Warning: in_array() expects parameter 2 to be array, null given in /www/web/cusabio_cn/public_html/caches/caches_template/default/content/show_product_protein.php on line 662
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
緩沖液：

If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
復溶：

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
儲存條件：

Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
保質期：

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
貨期：

Basically, we can dispatch the products out in 3-7 working days after receiving your orders. Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
注意事項：

Repeated freezing and thawing is not recommended. Store working aliquots at 4℃ for up to one week.
Datasheet & COA：

Please contact us to get it.

產品評價

靶點詳情

功能：

RNA helicase that acts as a sensor of the transcriptional status of both RNA polymerase (Pol) I and II: promotes ribosomal RNA (rRNA) processing and transcription from polymerase II (Pol II). Binds various RNAs, such as rRNAs, snoRNAs, 7SK and, at lower extent, mRNAs. In the nucleolus, localizes to rDNA locus, where it directly binds rRNAs and snoRNAs, and promotes rRNA transcription, processing and modification. Required for rRNA 2'-O-methylation, possibly by promoting the recruitment of late-acting snoRNAs SNORD56 and SNORD58 with pre-ribosomal complexes. In the nucleoplasm, binds 7SK RNA and is recruited to the promoters of Pol II-transcribed genes: acts by facilitating the release of P-TEFb from inhibitory 7SK snRNP in a manner that is dependent on its helicase activity, thereby promoting transcription of its target genes. Functions as cofactor for JUN-activated transcription: required for phosphorylation of JUN at 'Ser-77'. Can unwind double-stranded RNA (helicase) and can fold or introduce a secondary structure to a single-stranded RNA (foldase). Together with SIRT7, required to prevent R-loop-associated DNA damage and transcription-associated genomic instability: deacetylation by SIRT7 activates the helicase activity, thereby overcoming R-loop-mediated stalling of RNA polymerases. Involved in rRNA processing. May bind to specific miRNA hairpins. Component of a multi-helicase-TICAM1 complex that acts as a cytoplasmic sensor of viral double-stranded RNA (dsRNA) and plays a role in the activation of a cascade of antiviral responses including the induction of proinflammatory cytokines via the adapter molecule TICAM1.
基因功能參考文獻：
1. can drastically reduce DDX21's affinity for quadruplex, indicating that the recognition of quadruplex and specificity for telomeric repeat containing RNA quadruplex is mediated by interactions with the 2'OH of loop nucleotides PMID: 29906500
2. Knockdown of SIRT7 leads to the same phenotype as depletion of DDX21 (i.e., increased formation of R loops and DNA double-strand breaks), indicating that SIRT7 and DDX21 cooperate to prevent R-loop accumulation, thus safeguarding genome integrity. PMID: 28790157
3. DDX21 can suppress the expression of proteins with G4 qudruplexes in the 3 UTR of its mRNA. PMID: 28472472
4. Results report the biogenesis and function of a box H/ACA snoRNA-ended sno-lncRNA, referred to SLERT (snoRNA-ended lncRNA enhances pre-ribosomal RNA transcription). SLERT is different from Prader-Willi Syndrome (PWS) sno-lncRNAs and plays a crucial role in rRNA biogenesis by dislodging a previously unknown clamp of DDX21 ring-shaped arrangements on Pol I complexes, thereby liberating Pol I for active rRNA transcription. PMID: 28475895
5. In dengue virus infected cells, DDX21 translocates from nucleus to cytoplasm to active the innate immune response and thus inhibits DENV replication in the early stages of infection. PMID: 27033607
6. DDX21 expression in breast cancer cells can promote AP-1 activity and rRNA processing, and thus, promote tumorigenesis by two independent mechanisms. PMID: 25260534
7. Identification of several late-acting snoRNAs that bind pre-40S particles in human cells and show that their association and function in pre-40S complexes is regulated by the RNA helicase DDX21. PMID: 25477391
8. results uncover the multifaceted role of DDX21 in multiple steps of ribosome biogenesis, and provide evidence implicating a mammalian RNA helicase in RNA modification and Pol II elongation control PMID: 25470060
9. As sequential interaction of PB1 and NS1 with DDX21 leads to temporal regulation of viral gene expression, influenza A virus likely uses the DDX21-NS1 interaction not only to overcome restriction, but also to regulate the viral life cycle. PMID: 24721576
10. Data indicate that DDX21, a nucleolar protein, was confirmed to associate with SET8. PMID: 23419719
11. RNA helicase II/Gualpha silencing inhibits mammalian ribosomal RNA production PMID: 14559904
12. the function of Gu(alpha)in rRNA processing is at least partially dependent on its ability to interact with ribosomal protein L4. PMID: 16045751
13. in addition to its transcriptional effects, c-Jun regulates rRNA processing and nucleolar compartmentalization of the rRNA processing protein DDX21 PMID: 18180292
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亞細胞定位：

Nucleus, nucleolus. Nucleus, nucleoplasm. Cytoplasm, cytosol. Mitochondrion.
蛋白家族：

DEAD box helicase family, DDX21/DDX50 subfamily
數據庫鏈接：

HGNC: 2744

OMIM: 606357

KEGG: hsa:9188

STRING: 9606.ENSP00000346120

UniGene: Hs.223141