Laboratory of Transport Through Biomembranes

Head: Katarzyna A. NAŁĘCZ

 

Staff: Barbara JURASZEK, Dominika JURKIEWICZ, Vasylyna KOVALCHUK, Karolina ROGALA

 

Reserach profile:

 

Studies on proteins transporting carnitine to the cell, in particular on organic cation/carnitine transporter – OCTN2 (SLC22A5) and amino acid transporter B(0,+) – ATB(0,+) (SLC6A14). The experiments have been focused on the mechanism of transporters trafficking to plasma membrane and the role of other proteins in this process. Establishing the role of transporters domains in interaction with other proteins is one of the goals. Studies on both transporters in cancer cells have been undertaken.

 

Methods:

 

  • Cell culture (primary culture of brain cells and cells transfected with vectors containing the studied genes)
  • Preparing vectors with mutated genes coding studied transporters
  • Transport measurements
  • Immunocytochemistry
  • Quantitative estimation of gene expression
  • Proteomics of hydrophobic proteins

 

Current research activities:

 

Studies on the mechanism of ATB(0,+) exit from endoplasmic reticulum

Studies on interaction of OCTN2 with PDZ-domain containing proteins

Studies on OCTN2 proteome and transporter interaction with PP2A phosphatase

Studies on ATB(0,+) in cancer cells

 

Selected publications:

 

Juraszek B., Nałęcz K.A. (2016) Protein phosphatase PP2A – a novel interacting partner of carnitine transporter OCTN2 (SLC22A5) in rat astrocytes, J. Neurochem. 139, 537-551

 

Michalec K., Mysiorek C., Kuntz M., Bérézowski V., Szczepankiewicz A.A., Wilczyński G., Cecchelli R., Nałęcz K.A. (2014) Protein kinase C restricts transport of carnitine by amino acid transporter ATB0,+ apically localized in the blood-brain barrier, Archiv. Biochem. Biophys, 544, 28-35.

 

Czeredys M., Samluk Ł., Michalec K., Tułodziecka K. Skowronek K., Nałęcz K.A. (2013) Caveolin-1 – a novel interacting partner of Organic Cation./carnitine Transporter (Octn2): Effect of protein kinase C on this interaction in rat astrocytes, PLoS ONE, 8, e82105.

 

Samluk Ł., Czeredys M., Skowronek K., Nałęcz, K.A. (2012) Protein kinase C regulates amino acid transporter ATB(0,+), Biochem Biophys Res Commun, 422, 64-69.

 

Samluk Ł, Czeredys M., Nałęcz K.A. (2010) Regulation of amino acid/carnitine transporter B0,+ (ATB0,+) in astrocytes by protein kinase C: Independent effects on raft and non-raft subpopulations. J. Neurochem. 115, 1386-1397.