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P-stalk ribosomes act as master regulators of cytokine-mediated processes

ABSTRACT: P-stalk ribosomes act as master regulators of cytokine-mediated processes

PROVIDER: PRJNA957309 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24215550.fastq.gz	Fastqsanger.gz
	SRR24215551.fastq.gz	Fastqsanger.gz
	SRR24215552.fastq.gz	Fastqsanger.gz
	SRR24215553.fastq.gz	Fastqsanger.gz

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P-stalk ribosomes act as master regulators of cytokine-mediated processes

Project description:HLA Class I antigen processing and presentation (APP) is a highly regulated process that enables CD8+ T cell immunosurveillance. APP begins with the ribosomal synthesis of a source antigen, yet the role of ribosomes, particularly specialized ribosomes, in antigen presentation is poorly understood. Here, we show that the presence of the “P-stalk” on the ribosome enhances antigen presentation. The addition of the P-stalk to the ribosome is stimulated by cytokines that upregulate APP components, and knockdown of one of the P-stalk proteins (P1) reduces T cell recognition of tumor cells. Mechanistically, we show that P1-containing ribosomes exhibit enhanced translation of HLA Class I molecules and accessory APP components. Finally, analysis of patient data reveals that the mRNA expression of the P-stalk proteins positively correlates with CD8+ T cell infiltration, a trend not seen for other ribosomal proteins. In all, we demonstrate that the presence of the P-stalk defines a specialized ribosome population that enhances antigen presentation, something that may be exploited by cancer cells to escape immunosurveillance.

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