HCoV-HKU1 Spike Protein (Q0ZME7, sf9, His)

The HCoV-HKU1 spike protein initiates viral infection by binding to host receptors, promoting attachment of viral particles to the cell membrane. As a class I viral fusion protein, it coordinates the fusion between the virion and the cell membrane through a series of conformational states. HCoV-HKU1 Spike Protein (Q0ZME7, sf9, His) is the recombinant Virus-derived HCoV-HKU1 Spike protein, expressed by Sf9 insect cells , with C-His labeled tag.

The HCoV-HKU1 Spike/S1 Protein plays a pivotal role in the viral infection process by attaching the virion to the cell membrane through interaction with host receptors, thereby initiating infection. Functioning as a class I viral fusion protein, it mediates the fusion of the virion with cellular membranes. The protein undergoes at least three conformational states: a pre-fusion native state, a pre-hairpin intermediate state, and a post-fusion hairpin state. During the fusion process between viral and target cell membranes, the coiled coil regions (heptad repeats) adopt a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. This structural rearrangement is crucial for driving the apposition and subsequent fusion of viral and target cell membranes.

Virus

Sf9 insect cells

C-His

Q0ZME7 (A13-P1295)

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Extracellular Domain

AVIGDFNCTNSFINDYNKTIPRISEDVVDVSLGLGTYYVLNRVYLNTTLLFTGYFPKSGANFRDLALKGSIYLSTLWYKPPFLSDFNNGIFSKVKNTKLYVNNTLYSEFSTIVIGSVFVNTSYTIVVQPHNGILEITACQYTMCEYPHTVCKSKGSIRNESWHIDSSEPLCLFKKNFTYNVSADWLYFHFYQERGVFYAYYADVGMPTTFLFSLYLGTILSHYYVMPLTCNAISSNTDNETLEYWVTPLSRRQYLLNFDEHGVITNAVDCSSSFLSEIQCKTQSFAPNTGVYDLSGFTVKPVATVYRRIPNLPDCDIDNWLNNVSVPSPLNWERRIFSNCNFNLSTLLRLVHVDSFSCNNLDKSKIFGSCFNSITVDKFAIPNRRRDDLQLGSSGFLQSSNYKIDISSSSCQLYYSLPLVNVTINNFNPSSWNRRYGFGSFNLSSYDVVYSDHCFSVNSDFCPCADPSVVNSCAKSKPPSAICPAGTKYRHCDLDTTLYVKNWCRCSCLPDPISTYSPNTCPQKKVVVGIGEHCPGLGINEEKCGTQLNHSSCFCSPDAFLGWSFDSCISNNRCNIFSNFIFNGINSGTTCSNDLLYSNTEISTGVCVNYDLYGITGQGIFKEVSAAYYNNWQNLLYDSNGNIIGFKDFLTNKTYTILPCYSGRVSAAFYQNSSSPALLYRNLKCSYVLNNISFISQPFYFDSYLGCVLNAVNLTSYSVSSCDLRMGSGFCIDYALPSSRRKRRGISSPYRFVTFEPFNVSFVNDSVETVGGLFEIQIPTNFTIAGHEEFIQTSSPKVTIDCSAFVCSNYAACHDLLSEYGTFCDNINSILNEVNDLLDITQLQVANALMQGVTLSSNLNTNLHSDVDNIDFKSLLGCLGSQCGSSSRSLLEDLLFNKVKLSDVGFVEAYNNCTGGSEIRDLLCVQSFNGIKVLPPILSETQISGYTTAATVAAMFPPWSAAAGVPFSLNVQYRINGLGVTMDVLNKNQKLIANAFNKALLSIQNGFTATNSALAKIQSVVNANAQALNSLLQQLFNKFGAISSSLQEILSRLDNLEAQVQIDRLINGRLTALNAYVSQQLSDITLIKAGASRAIEKVNECVKSQSPRINFCGNGNHILSLVQNAPYGLLFIHFSYKPTSFKTVLVSPGLCLSGDRGIAPKQGYFIKQNDSWMFTGSSYYYPEPISDKNVVFMNSCSVNFTKAPFIYLNNSIPNLSDFEAELSLWFKNHTSIAPNLTFNSHINATFLDLYYEMNVIQESIKSLNSSFINLKEIGTYEMYVKWP

≥ 80%, as determined by reducing SDS-PAGE.

<1 EU/μg, determined by LAL method.