The PRKAG3 gene encodes a muscle-specific isoform of the regulatory gamma subunit of AMP-activated protein kinase (AMPK). A major part of the coding PRKAG3 sequence was isolated from horse muscle cDNA using reverse-transcriptase (RT)-PCR analysis. Horse-specific primers were used to amplify genomic fragments containing 12 exons. Comparative sequence analysis of horse, pig, mouse, human, Fugu, a...

Circadian clocks coordinate physiological, behavioral, and biochemical events with predictable daily environmental changes by a self-sustained transcriptional feedback loop. CLOCK and ARNTL are transcriptional activators that regulate Per and Cry gene expression. PER and CRY inhibit their own transcription, and their turnover allows this cycle to restart. The transcription factors BHLHB2 and BH...

5 -AMP–activated protein kinase (AMPK) is important for metabolic sensing. We used AMPK 3 mutant–overexpressing Tg-Prkag3 and AMPK 3-knockout Prkag3 / mice to determine the role of the AMPK 3 isoform in exerciseinduced metabolic and gene regulatory responses in skeletal muscle. Mice were studied after 2 h swimming or 2.5 h recovery. Exercise increased basal and insulin-stimulated glucose transp...

The effect of I199V polymorphism at the PRKAG3 gene on carcass and meat quality of commercial pigs was studied independently from PRKAG3 200Q or RYR1 “n” allele, known to decrease meat quality, i.e., animals were genotyped for RYR1 R615C, PRKAG3 I199V and R200Q substitutions, and only pigs without 200Q and “n” were retained for the analysis of carcass and meat quality traits (n = 274). Genotype...

This study was conducted to determine the relationships of five intragenic single nucleotide polymorphism (SNP) markers (protein kinase adenosine monophosphate-activated γ3 subunit [PRKAG3], fatty acid synthase [FASN], calpastatin [CAST], high mobility group AT-hook 1 [HMGA1], and melanocortin-4 receptor [MC4R]) and meat quality traits of Duroc breeding stocks in Korea. A total of 200 purebred ...

BACKGROUND AMP-activated protein kinase (AMPK) plays an important role in the regulation of glucose and lipid metabolism in skeletal muscle. Many pigs of Hampshire origin have a naturally occurring dominant mutation in the AMPK γ3 subunit. Pigs carrying this PRKAG3 (R225Q) mutation have, compared to non-carriers, higher muscle glycogen levels and increased oxidative capacity in m. longissimus d...

The RN− (rendement Napole, French for Napole yield) phenotype is common in Hampshire pigs and is characterized by a 70% increase in glycogen content in skeletal muscle and large effects on meat characteristics (pH, water content, technological yield and lean meat content). The phenotype is controlled by an autosomal dominant allele designated RN−. The protein kinase AMP-activated γ 3 subunit ge...

OBJECTIVE To examine the genes for AMP-activated protein kinase (AMPK) subunits alpha2 (PRKAA2) and gamma3 (PRKAG3) as candidates for polycystic ovary syndrome (PCOS) and its component traits. DESIGN AND METHODS A total of 287 white PCOS women were recruited from the reproductive endocrinology clinic at the University of Alabama at Birmingham and 187 white control subjects were recruited from...

AMP-activated protein kinase (AMPK) plays an important role in the regulation of glucose and lipid metabolism in skeletal muscle. Many pigs of Hampshire origin have a naturally occurring mutation situated in the PRKAG3 gene which encodes a muscle-specific isoform of the AMPK γ3-subunit. This mutation results in excessive glycogen storage mainly in white glycolytic skeletal muscle and an increas...