Structural polyprotein Recombinant Protein | C recombinant protein
Recombinant Ross river virus Structural polyprotein
NCBI and Uniprot Product Information
Uniprot Description
Function: Capsid protein possesses a protease activity that results in its autocatalytic cleavage from the nascent structural protein. Following its self-cleavage, the capsid protein transiently associates with ribosomes, and within several minutes the protein binds to viral RNA and rapidly assembles into icosaedric core particles. The resulting nucleocapsid eventually associates with the cytoplasmic domain of E2 at the cell membrane, leading to budding and formation of mature virions. New virions attach to target cells, and after endocytosis their membrane fuses with the target cell membrane. This leads to the release of the nucleocapsid into the cytoplasm, followed by an uncoating event necessary for the genomic RNA to become accessible. The uncoating might be triggered by the interaction of capsid proteins with ribosomes. Binding of ribosomes would release the genomic RNA since the same region is genomic RNA-binding and ribosome-binding
By similarity.E3 protein's function is unknown
By similarity.E2 is responsible for viral attachment to target host cell, by binding to the cell receptor. Synthesized as a p62 precursor which is processed by furin at the cell membrane just before virion budding, giving rise to E2-E1 heterodimer. The p62-E1 heterodimer is stable, whereas E2-E1 is unstable and dissociate at low pH. p62 is processed at the last step, presumably to avoid E1 fusion activation before its final export to cell surface. E2 C-terminus contains a transitory transmembrane that would be disrupted by palmitoylation, resulting in reorientation of the C-terminal tail from lumenal to cytoplasmic side. This step is critical since E2 C-terminus is involved in budding by interacting with capsid proteins. This release of E2 C-terminus in cytoplasm 7occurs lately in protein export, and precludes premature assembly of particles at the endoplasmic reticulum membrane
By similarity.6K is a constitutive membrane protein involved in virus glycoprotein processing, cell permeabilization, and the budding of viral particles. Disrupts the calcium homeostasis of the cell, probably at the endoplasmic reticulum level. This leads to cytoplasmic calcium elevation. Because of its lipophilic properties, the 6K protein is postulated to influence the selection of lipids that interact with the transmembrane domains of the glycoproteins, which, in turn, affects the deformability of the bilayer required for the extreme curvature that occurs as budding proceeds. Present in low amount in virions, about 3% compared to viral glycoproteins
By similarity.E1 is a class II viral fusion protein. Fusion activity is inactive as long as E1 is bound to E2 in mature virion. After virus attachment to target cell and endocytosis, acidification of the endosome would induce dissociation of E1/E2 heterodimer and concomitant trimerization of the E1 subunits. This E1 trimer is fusion active, and promotes release of viral nucleocapsid in cytoplasm after endosome and viral membrane fusion. Efficient fusion requires the presence of cholesterol and sphingolipid in the target membrane
By similarity.
Catalytic activity: Autocatalytic release of the core protein from the N-terminus of the togavirus structural polyprotein by hydrolysis of a -Trp-|-Ser- bond.
Subunit structure: p62 and E1 form a heterodimer shortly after synthesis. Processing of p62 into E2 and E3 results in a heterodimer of E2 and E1. Spike at virion surface are constituted of three E2-E1 heterodimers. After target cell attachment and endocytosis, E1 change conformation to form homotrimers
By similarity.
Subcellular location: Capsid protein: Virion
By similarity. Host cytoplasm
By similarity. p62: Virion membrane; Single-pass type I membrane protein
By similarity. Host cell membrane; Single-pass type I membrane protein
By similarity. E2 envelope glycoprotein: Virion membrane; Single-pass type I membrane protein
By similarity. Host cell membrane; Single-pass type I membrane protein
By similarity. E1 envelope glycoprotein: Virion membrane; Single-pass type I membrane protein
By similarity. Host cell membrane; Single-pass type I membrane protein
By similarity. 6K protein: Host cell membrane; Multi-pass membrane protein
By similarity. Virion membrane; Multi-pass membrane protein
By similarity.
Post-translational modification: Specific enzymatic cleavages in vivo yield mature proteins. Capsid protein is auto-cleaved during polyprotein translation, unmasking p62 signal peptide. The remaining polyprotein is then targeted to the endoplasmic reticulum, where host signal peptidase cleaves it into p62, 6K and E1 proteins. p62 is further processed to mature E3 and E2 by host furin in trans-Golgi vesicle
By similarity.E2 and 6K are palmitoylated via thioester bonds.
Miscellaneous: Structural polyprotein is translated from a subgenomic RNA synthesized during togaviruses replication.
Sequence similarities: Contains 1 peptidase S3 domain.
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Product Notes
The Structural polyprotein c (Catalog #AAA1209300) is a Recombinant Protein produced from E Coli or Yeast or Baculovirus or Mammalian Cell and is intended for research purposes only. The product is available for immediate purchase. The immunogen sequence is 817-1254. The amino acid sequence is listed below: YEHTATIPNV VGFPYKAHIE RNGFSPMTLQ LEVVETSWEP TLNLEYITCE YKTVVPSPFI KCCGTSECSS KEQPDYQCKV YTGVYPFMWG GAYCFCDSEN TQLSEAYVDR SDVCKHDHAS AYKAHTASLK ATIRISYGTI NQTTEAFVNG EHAVNVGGSK FIFGPISTAW SPFDNKIVVY KDDVYNQDFP PYGSGQPGRF GDIQSRTVES KDLYANTALK LSRPSPGVVH VPYTPTPSGF KYWLKEKGSS LNTKAPFGCK IKTNPVRAMD CAVGSIPVSM DIPDSAFTRV VDAPAVTDLS CQVVVCTHSS DFGGVATLSY KTDKPGKCAV HSHSNVATLQ EATVDVKEDG KVTVHFSTAS ASPAFKVSVC DAKTTCTAAC EPPKDHIVPY GASHNNQVFP DMSGTAMTWV QRLASGLGGL ALIAVVVLVL VTCITMRR. It is sometimes possible for the material contained within the vial of "Structural polyprotein, Recombinant Protein" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
All products in the AAA Biotech catalog are strictly for research-use only, and are absolutely not suitable for use in any sort of medical, therapeutic, prophylactic, in-vivo, or diagnostic capacity. By purchasing a product from AAA Biotech, you are explicitly certifying that said products will be properly tested and used in line with industry standard. AAA Biotech and its authorized distribution partners reserve the right to refuse to fulfill any order if we have any indication that a purchaser may be intending to use a product outside of our accepted criteria.Disclaimer
Though we do strive to guarantee the information represented in this datasheet, AAA Biotech cannot be held responsible for any oversights or imprecisions. AAA Biotech reserves the right to adjust any aspect of this datasheet at any time and without notice. It is the responsibility of the customer to inform AAA Biotech of any product performance issues observed or experienced within 30 days of receipt of said product. To see additional details on this or any of our other policies, please see our Terms & Conditions page.Item has been added to Shopping Cart
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