Recombinant Human Sars Coronavirus Nucleoprotein (N) Protein (His&Myc)

Beta LifeScience SKU/CAT #: BLC-01377P
Greater than 85% as determined by SDS-PAGE.
Greater than 85% as determined by SDS-PAGE.

Recombinant Human Sars Coronavirus Nucleoprotein (N) Protein (His&Myc)

Beta LifeScience SKU/CAT #: BLC-01377P
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Product Overview

Description Recombinant Human Sars Coronavirus Nucleoprotein (N) Protein (His&Myc) is produced by our Baculovirus expression system. This is a full length protein.
Purity Greater than 85% as determined by SDS-PAGE.
Uniprotkb P59595
Target Symbol N
Synonyms Nucleocapsid protein
Species Human SARS coronavirus (SARS-CoV) (Severe acute respiratory syndrome coronavirus)
Expression System Baculovirus
Tag N-10His&C-Myc
Target Protein Sequence MSDNGPQSNQRSAPRITFGGPTDSTDNNQNGGRNGARPKQRRPQGLPNNTASWFTALTQHGKEELRFPRGQGVPINTNSGPDDQIGYYRRATRRVRGGDGKMKELSPRWYFYYLGTGPEASLPYGANKEGIVWVATEGALNTPKDHIGTRNPNNNAATVLQLPQGTTLPKGFYAEGSRGGSQASSRSSSRSRGNSRNSTPGSSRGNSPARMASGGGETALALLLLDRLNQLESKVSGKGQQQQGQTVTKKSAAEASKKPRQKRTATKQYNVTQAFGRRGPEQTQGNFGDQDLIRQGTDYKHWPQIAQFAPSASAFFGMSRIGMEVTPSGTWLTYHGAIKLDDKDPQFKDNVILLNKHIDAYKTFPPTEPKKDKKKKTDEAQPLPQRQKKQPTVTLLPAADMDDFSRQLQNSMSGASADSTQA
Expression Range 1-422aa
Protein Length Full Length
Mol. Weight 49.9 kDa
Research Area Microbiology
Form Liquid or Lyophilized powder
Buffer Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage 1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function Packages the positive strand viral genome RNA into a helical ribonucleocapsid (RNP) and plays a fundamental role during virion assembly through its interactions with the viral genome and membrane protein M. Plays an important role in enhancing the efficiency of subgenomic viral RNA transcription as well as viral replication. May modulate transforming growth factor-beta signaling by binding host SMAD3.
Subcellular Location Virion. Host endoplasmic reticulum-Golgi intermediate compartment. Host Golgi apparatus. Host cytoplasm, host perinuclear region.
Protein Families Betacoronavirus nucleocapsid protein family
Database References

Gene Functions References

  1. The severe acute respiratory syndrome coronavirus N protein was found to bind to the SPRY domain of the tripartite motif protein 25 (TRIM25) E3 ubiquitin ligase, thereby interfering with the association between TRIM25 and retinoic acid-inducible gene I (RIG-I) and inhibiting TRIM25-mediated RIG-I ubiquitination and activation. PMID: 28148787
  2. Electrostatic repulsion acts as a switch to regulate SARS virus N protein oligomerization. PMID: 23717688
  3. These results suggest that SARS coronavirus could reduce pyruvate kinase activity via its nucleocapsid protein, and this may in turn cause disease. PMID: 22222284
  4. The co-localization of SARS-CoVN and CXCL16 in the cytoplasm of HEK293FT cells was also shown using confocal laser scanning microscopy. PMID: 20960183
  5. The HLA-A 2402 complexed with SARSV N1 showed a novel host strategy to present an immunodominant CTL epitope by intrachain hydrogen bond as a featured epitope. PMID: 20844028
  6. SARS-CoV N interacts with MAP19 and increased the expression of MAP19 in cells. PMID: 19737459
  7. This is the first report showing the ability of the nucleocapsid protein of SARS-CoV to induce apoptosis and actin reorganization in mammalian cells under stressed conditions. PMID: 15294014
  8. analysis of SARS-CoV nucleocapsid protein expressed in insect cells PMID: 15514849
  9. The nucleocapsid protein of the SARS coronavirus was cloned and purified. PMID: 15523835
  10. Binding to cyclophilin A during invasion of host cells. PMID: 15688292
  11. coronavirus N protein undergoes posttranslational modification by sumoylation; functional implication of this modification in the formation of coronavirus ribouncleoprotein complex, virion assembly and virus-host interactions PMID: 15848177
  12. the nucleocapsid protein forms a dimer through its C-terminal domain PMID: 15849181
  13. Differences in nuclear/nucleolar localization properties of N from other members of coronavirus family suggest a unique shuttle protein function for N, which may play an important role in the pathogenesis of SARS. PMID: 15992957
  14. results showed that the SARS-CoV N protein can significantly activate NF-kappaB only in Vero E6 cells, which are susceptible to SARS-CoV infection, but not in Vero or HeLa cells; suggests that NF-kappaB activation is cell-specific PMID: 16143815
  15. The secondary structure of the dimerization domain consists of five alpha helices and a beta-hairpin. PMID: 16214138
  16. Results show that the N protein consists of two non-interacting structural domains, the N-terminal RNA-binding domain (RBD) (residues 45-181) and the C-terminal dimerization domain (residues 248-365) (DD), surrounded by flexible linkers. PMID: 16228284
  17. data suggest that the SR-rich motif of the SARS-CoV N protein might play an import role in the transformation of the SARS-CoV N protein between the dimer and multimer during its binding to its central region for self-association or dissociation PMID: 16285739
  18. cytoplasmic localization was directed by region III and was the dominant localization signal in the N protein. PMID: 16298975
  19. the S phase inhibitory activity of the N protein may have major significance during viral pathogenesis PMID: 16431923
  20. the N protein has a dimer with extensive interactions between the two subunits, suggesting that the dimeric form of the N protein is the functional unit in vivo PMID: 16627473
  21. using the solution structure of severe acute respiratory (SARS) coronavirus N-protein, revealed that this motif is available for interaction with cellular factors which may mediate nucleolar localization PMID: 16734668
  22. This is the first report demonstrating the interaction of hUbc9 with a structural protein of plus-strand RNA viruses, indicating a new drug target for SARS-CoV. PMID: 16998888
  23. the nucleocapsid protein of severe acute respiratory syndrome coronavirus is sumoylated by interaction with Ubc9 PMID: 17037517
  24. characterization of the structures of N protein N-terminal domain in two crystal forms, at 1.17 A (monoclinic) and at 1.85 A (cubic), respectively PMID: 17229691
  25. The C-terminal domain (CTD), spanning residues 248-365 (NP248-365), had stronger nucleic acid-binding activity than the NTD. The crystal structure of the NP248-365 region is solved, suggesting a mechanism for helical RNA packaging in the virus. PMID: 17379242
  26. SARS coronavirus N protein can induce apoptosis of COS-1 cells by activating mitochondrial pathway PMID: 17453707
  27. We also showed that N protein activated IL-6 expression through NF-kappaB by facilitating the translocation of NF-kappaB from cytosol to nucleus. PMID: 17490702
  28. SARS coronavirus nucleocapsid protein interacts with Smad3 and modulates transforming growth factor-beta signaling PMID: 18055455
  29. The experiments revealed that N induces the intrinsic apoptotic pathway, resulting in processing of N at residues 400 and 403 by caspase-6 and/or caspase-3. PMID: 18155731
  30. fgl2 gene transcription induced by the N protein of SARS-CoV was dependent on transcription factor C/EBP alpha binding with its cognate cis-element in fgl2 promoter. PMID: 18390877
  31. It was demonstrated that the N protein of SARS-CoV induces aggregation of EF1, inhibiting protein translation and cytokinesis by blocking F-actin bundling. PMID: 18448518
  32. This study employed the SAIL method to determine the high-quality solution structure of the severe acute respiratory syndrome coronavirus nucleocapsid protein C-terminal domain by NMR. PMID: 18561946
  33. the domain conferring the ability to direct virus-like particle assembly and release in SARS-CoV N is largely contained between residues 168 and 421 PMID: 18592403
  34. Phosphorylation of the arginine/serine motif of the nucleocapsid protein did not significantly affect RNA binding of the nucleocapsid protein but impaired its multimerization ability. PMID: 18631359
  35. This paper describes the work to identify two proteins/protein fragments of N protein and to determine their source. PMID: 18926799
  36. An excessive host immune response against the nucleocapsid protein of severe acute respiratory syndrome-associated coronavirus (SARS-CoV) is involved in severe pneumonia caused by SARS-CoV infection. PMID: 18941225
  37. The SARS-CoV N protein is a modular protein containing multiple RNA-binding sites. PMID: 19052082
  38. thermostability of the N-terminal RNA-binding domain (RBD) of the N protein; results showed the thermal-induced unfolding-folding transition of the RBD follows a two-state model with a reversibility >90% PMID: 19254548
  39. SR-rich motif is critical for effective virus replication. PMID: 19370068
  40. SARS-CoV N protein specifically modulates transcription of the FGL2 gene to cause fibrosis and vascular thrombosis. PMID: 19423547

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.

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