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Table 6 List of replicase polyproteins 1a and 1ab tryptic peptides identified in saliva samples collected from COVID-19 positive individuals grouped by the polyprotein fragment to which they belong and their functions

From: Identification of SARS-CoV-2 biomarkers in saliva by transcriptomic and proteomics analysis

Protein name

Peptide sequence

Polyprotein fragment name

Polyprotein fragment function

R1A/R1AB

LTDNVYIK

Nsp-3

Papain-like protease

RVLNVVCK

TFYVLPNDDTLR

TTEVVGDIILKPANNSLK

IALKGGK

Nsp-4

NS

IVNNWLKQLIK

IVQLSEISMDNSPNLAWPLIVTALR

VIGHSMQNCVLKLK

Nsp-5

3C-like proteinase

KSLNVAK

Nsp-8

NS

SHnIALIWnVKDFmSLSEQLR

WARFPK

Nsp-9

NS

R1AB

LKLFDR

Nsp-12

RNA-directed RNA polymerase

EFLTRNPAWR

Nsp-13

Helicase

VSAKPPPGDQFK

Nsp-14

Proofreading exonuclease

NLQEFKPR

Nsp-15

Uridylate-specific endoribonuclease

QASLNGVTLIGEAVK

  1. R1A replicase polyprotein 1a (accession number: P0DTC1), R1AB replicase polyprotein 1ab (accession number: P0DTD1), Nsp Non-structural protein, NS Non-specific