Any process that stops, prevents, or reduces the frequency, rate, or extent of antigen processing and presentation of peptide antigen via MHC class I.
Synonyms:
exact_synonym:
down regulation of antigen processing and presentation of peptide antigen via MHC class I; downregulation of antigen processing and presentation of peptide antigen via MHC class I; negative regulation of peptide antigen processing and presentation via MHC class I
narrow_synonym:
inhibition of antigen processing and presentation of peptide antigen via MHC class I