Protein kinase C activation upregulates human L-type amino acid transporter 2 function.

ABSTRACT: L-type amino acid transporter 2 (LAT2) is a Na⁺-independent neutral amino acid transporter, whose function regulation system remains unclarified. Since protein kinase C (PKC) is known to regulate the functions of various transporters, we investigated whether human LAT2 (hLAT2) function is regulated by PKC. In mouse proximal tubule S2 cells, hLAT2 transport activity was upregulated by PKC activation. However, we found that the mRNA and protein expression of hLAT2 was not affected by PKC activation and that the upregulation was independent of the three potential PKC consensus sites in the hLAT2 amino acid sequence. Moreover, we found that PKC activation upregulated the Vmax value for hLAT2-mediated alanine transport, which was not accompanied by the induction of hLAT2 membrane ins

SUBMITTER: Morio H 

PROVIDER: S-EPMC10716992 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature