Irena Patuszak

Title: Irena Patuszak and Research on GalNAc-1-Phosphate Kinase

Introduction

Irena Patuszak is an inventor associated with the University of Arkansas and located in Little Rock, Arkansas. Her patent-related work concerns the characterization of an enzyme that phosphorylates N-acetylgalactosamine (GalNAc).

Latest Patents

Patuszak is associated with 1 patent, titled “Liver GalNAc-1-phosphate kinase.” The research describes the purification and characterization of a kinase that phosphorylates GalNAc at position 1, producing GalNAc-α-1P. The enzyme was purified approximately 1,275-fold from the cytosolic fraction of pig kidney.

The patent description reports that the kinase is specific to GalNAc as a phosphate acceptor and is inactive with several other sugars and amino sugars, including GlcNAc, ManNAc, glucose, galactose, mannose, GalN, and GlcN. The native enzyme has a molecular mass of approximately 48–51 kDa and can be separated from galactokinase by chromatography. Its optimal pH is between 8.5 and 9.0, and it requires a divalent cation, with magnesium supporting the greatest activity. ATP is its most effective phosphate donor among those tested. Activity was highest in porcine and human kidney and porcine liver, and low in most other tissues.

Career Highlights

Patuszak’s patent-associated research contributes to the biochemical understanding of GalNAc metabolism by identifying and describing an enzyme with a specific substrate profile and measurable biochemical properties. The work also distinguishes the kinase from galactokinase and documents its activity across selected tissues.

Collaborations

The listed collaborators include Richard Drake and Alan D. Elbein. Their names are associated with the research on the enzyme’s purification and characterization.

Conclusion

Irena Patuszak’s patent-associated work documents the properties of GalNAc-1-phosphate kinase and its role in phosphorylating GalNAc, highlighting a focused contribution to biochemical research.