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Identification and characterization of mouse Ppfia1 gene in silico.

Array CGH combined with mRNA microarray analyses was successfully applied for genome-wide screening of proto-oncogenes and tumor suppressor genes in 2002. The CCND1-ORAOV1-FGF19-FGF4-FGF3-FLJ10261-FADD-PPFIA1-EMS1 locus on human chromosome 11q13 is one of the most frequently amplified regions within the human genome. Here, we identified and characterized mouse Ppfia1 gene by using bioinformatics. Nucleotide sequence of mouse Ppfia1 cDNA was determined in silico by assembling nucleotide sequences of ESTs BY727670, CA327608, BU708520, BQ886535, and a 5'-truncated partial cDNA BC038349. Mouse Ppfia1 gene, consisting of 28 exons, was located between Fadd and Ems1 (also known as Cttn) genes on mouse chromosome 7. Mouse Ppfia1 (1201 aa) and human PPFIA1 (1202 aa), showing 95.8% total-amino-acid identity, were found to consist of MAH ( myosin heavy chain tail and ATPase homologous) domain and three SAM (sterile alpha motif) domains. MAH domain is implicated in the homo- or hetero-oligomer formation through the coiled-coil interaction, while SAM domain is implicated in the interaction with other proteins. Mouse Ccnd1-Ems1 locus and human CCND1-EMS1 locus were evolutionarily conserved in the order and the orientation of genes therein. Nucleotide and amino-acid substitution rates of Ccnd1, Ppfia1 and Ems1 genes located near both ends of the Ccnd1-Ems1 locus were relatively lower than those in the middle part of the locus. This is the first report on mouse Ppfia1 gene as well as comprehensive comparison of CCND1-EMS1 locus within the human and mouse genomes.[1]

References

  1. Identification and characterization of mouse Ppfia1 gene in silico. Katoh, M., Katoh, M. Int. J. Mol. Med. (2003) [Pubmed]
 
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