PMID: 11931393Apr 5, 2002Paper

Identification of human, mouse and rat PPP1R14A, protein phosphatase-1 inhibitor subunit 14A, & mapping human PPP1R14A to chromosome 19q13.13-q13.2

Molecular Biology Reports
Z LiS Zhao

Abstract

Three novel cDNAs encoding putative protein phosphatase-1 inhibitory protein (PPP1R14A) were isolated from human, mouse and rat. The human, mouse and rat PPP1R14A proteins were all of 147 amino acids sharing about 90% sequence identity to porcine CPI17, an inhibitor of protein phosphatase-1 holoenzyme. The protein sequence 33RHARVTVK40, which is important for the inhibitory potency of porcine CPI17, was conserved in mammalian PPP1R14A. Northern blot analysis showed that human PPP1R14A was highly expressed as a 600 bp transcript in heart, prostate, testis, ovary, colon, small intestine and pancreas, lowly in brain, placenta, skeletal muscle and spleen and lung. The distribution of mouse and rat PPP1R14A was more specific and different from that of human PPP1R14A, abundant in lung, moderate/abundant in testis, moderate in brain and low in heart. In addition, we mapped human PPP1R14A to chromosome 19q13.13-q13.2 by radiation hybrid mapping, and determined that the human PPP1R14A gene spanned a 5.1-kb region and consisted of four exons and three introns.

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