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Assignment of protein kinase, AMP-activated,beta 2 non-catalytic subunit (PRKAB2) gene to porcine chromosome 4q21→ 23 by somatic cell and radiation hybrid panel mapping

PRKAB2 (protein kinase, AMP-activated, beta 2 non-catalytic subunit) belongs to a protein kinase family that has a key role in regulation of energy metabolism in eukaryotic cells. PRKAB2 is activated by an increase in the ratio of adenosine monophosphate to adenosine triphosphate. Activated PRKAB2 turns on ATP producing pathways and inhibits ATPconsuming pathways (Thornton et al., 1998). PRKAB2 can inactivate by phosphorylation glycogen synthase, the key regulatory enzyme of glycogen synthesis (Hardie et al., 1998), and stimulate fatty acid oxidation (Yamauchi et al., 2003). Therefore, it plays significant roles in fat and glucose metabolism, which are the major determinants for meat quality in domestic animals. The mapping of the porcine PRKAB2 gene is one step towards further investigation on its possible role in meat quality traits in pigs. Materials and methods