S蛋白|鸡传染性支气管炎病毒S蛋白|鸡传染性支气管炎病毒S重

Research Areas

Microbiology

Uniprot ID

P12650

Gene Names

S

Alternative Name(s)

(S glycoprotein)(E2)(Peplomer protein)

Lead Time

18-23 business days

Organism

Avian infectious bronchitis virus (strain KB8523) (IBV)

Source

in vitro E.coli expression system

Expression Region

317-537aa

Protein Length

Partial

Tag Info

C-terminal 6xHis-tagged

Target Protein Sequence

ESNFMYGSYHPSCSFRLETINNGLWFNSLSVSIAYGPLQGGCKQSVFSGRATCCYAYSYGGPLLCKGVYSGELDHNFECGLLVYVTKSGGSRIQTATEPPVITQHNYNNITLNTCVDYNIYGRIGQGFITNVTDSAVSYNYLADAGLAILDTSGSIDIFVVQSEYGLNYYKVNPCEDVNQQFVVSGGKLVGILTSRNETGSQLLENQFYIKITNGTRRFRR

MW

26.8 kDa

Purity

Greater than 85% as determined by SDS-PAGE.

Endotoxin

Not test.

Biological_Activity

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Form

Liquid or Lyophilized powder

Buffer

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.

Reconstitution

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.

Storage

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℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.

Notes

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

Relevance

[Spike protein S1]: Attaches the virion to the host cell membrane by interacting with sialic acids, initiating the infection.; [Spike protein S2]: Mediates fusion of the virion and cellular membranes by acting as a class I viral fusion protein. Under the current model, the protein has at least 3 conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and target cell membrane fusion, the coiled coil regions (heptad repeats) assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and target cell membranes.; [Spike protein S2']: Acts as a viral fusion peptide after S2 cleavage occurring upon virus endocytosis.

Function

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