Identification, expression and tissue distribution of a renalase homologue from mouse
Tóm tắt
FAD (flavin adenine dinucleotide)-dependent monoamine oxidases play very important roles in many biological processes. A novel monoamine oxidase, named renalase, has been identified in human kidney recently and is found to be markedly reduced in patients with end-stage renal disease (ESRD). Here, we reported the identification of a renalase homologue from mouse, termed mMAO-C (mouse monoamine oxidase-C) after the monoamine oxidase-A and -B (MAO-A and -B). This gene locates on the mouse chromosome 19C1 and its coding region spans 7 exons. The deuced amino acid sequences were predicted to contain a typical secretive signal peptide and a conserved amine oxidase domain. Phylogenetic analysis and multiple sequences alignment indicated that mMAO-C-like sequences exist in all examined species and share significant similarities. This gene has been submitted to the NCBI GenBank database (Accession number: DQ788834). With expression vectors generated from the cloned mMAO-C gene, exogenous protein was effectively expressed in both prokaryotic and eukaryotic cells. Recombinant mMAO-C protein was secreted out of human cell lines, indicating the biological function of its signal peptide. Moreover, tissue expression pattern analysis revealed that mMAO-C gene is predominantly expressed in the mouse kidney and testicle, which implies that kidney and testicle are the main sources of renalase secretion. Shortly, this study provides an insight into understanding the physiological and biological functions of mMAO-C and its homologues in endocrine.
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