SARS-CoV-2 PP1ab Protein (His-MBP)

The multifunctional SARS-CoV-2 PP1ab protein is essential for viral RNA transcription and replication, utilizing proteases for multi-protein cleavage. It inhibits host translation by binding to the 40S subunit and blocks ribosomal mRNA entry channels, thereby hindering the antiviral response. SARS-CoV-2 PP1ab Protein (His-MBP) is the recombinant Virus-derived SARS-CoV-2 PP1ab protein, expressed by E. coli , with C-6*His labeled tag.

The SARS-CoV-2 PP1ab protein is a multifunctional component crucial for the transcription and replication of viral RNAs, housing the proteinases responsible for polyprotein cleavages. This protein plays a pivotal role in inhibiting host translation by associating with the open head conformation of the 40S subunit, and its C-terminus obstructs the ribosomal mRNA entry tunnel, thereby impeding the antiviral response triggered by innate immunity or interferons. The formation of the nsp1-40S ribosome complex leads to an endonucleolytic cleavage near the 5'UTR of host mRNAs, facilitating their degradation. Notably, viral mRNAs exhibit greater resistance to the nsp1-mediated inhibition of translation due to their 5'-end leader sequence. This multifaceted functionality underscores the strategic role of SARS-CoV-2 PP1ab in manipulating host cellular processes for the benefit of viral replication and evasion of host defenses.

Virus

E. coli

C-6*His

P0DTD1-1/YP_009724389.1 (A5325-Q5925)

43740578  [NCBI]

Partial

AVGACVLCNSQTSLRCGACIRRPFLCCKCCYDHVISTSHKLVLSVNPYVCNAPGCDVTDVTQLYLGGMSYYCKSHKPPISFPLCANGQVFGLYKNTCVGSDNVTDFNAIATCDWTNAGDYILANTCTERLKLFAAETLKATEETFKLSYGIATVREVLSDRELHLSWEVGKPRPPLNRNYVFTGYRVTKNSKVQIGEYTFEKGDYGDAVVYRGTTTYKLNVGDYFVLTSHTVMPLSAPTLVPQEHYVRITGLYPTLNISDEFSSNVANYQKVGMQKYSTLQGPPGTGKSHFAIGLALYYPSARIVYTACSHAAVDALCEKALKYLPIDKCSRIIPARARVECFDKFKVNSTLEQYVFCTVNALPETTADIVVFDEISMATNYDLSVVNARLRAKHYVYIGDPAQLPAPRTLLTKGTLEPEYFNSVCRLMKTIGPDMFLGTCRRCPAEIVDTVSALVYDNKLKAHKDKSAQCFKMFYKGVITHDVSSAINRPQIGVVREFLTRNPAWRKAVFISPYNSQNAVASKILGLPTQTVDSSQGSEYDYVIFTQTTETAHSCNVNRFNVAITRAKVGILCIMSDRDLYDKLQFTSLEIPRRNVATLQ

Approximately 120 kDa, based on SDS-PAGE under reducing conditions.

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

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