Structural analysis of the α subunit of Na(+)/K(+) ATPase genes in invertebrates

Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
Rahma ThabetVincent Leignel

Abstract

The Na(+)/K(+) ATPase is a ubiquitous pump coordinating the transport of Na(+) and K(+) across the membrane of cells and its role is fundamental to cellular functions. It is heteromer in eukaryotes including two or three subunits (α, β and γ which is specific to the vertebrates). The catalytic functions of the enzyme have been attributed to the α subunit. Several complete α protein sequences are available, but only few gene structures were characterized. We identified the genomic sequences coding the α-subunit of the Na(+)/K(+) ATPase, from the whole-genome shotgun contigs (WGS), NCBI Genomes (chromosome), Genomic Survey Sequences (GSS) and High Throughput Genomic Sequences (HTGS) databases across distinct phyla. One copy of the α subunit gene was found in Annelida, Arthropoda, Cnidaria, Echinodermata, Hemichordata, Mollusca, Placozoa, Porifera, Platyhelminthes, Urochordata, but the nematodes seem to possess 2 to 4 copies. The number of introns varied from 0 (Platyhelminthes) to 26 (Porifera); and their localization and length are also highly variable. Molecular phylogenies (Maximum Likelihood and Maximum Parsimony methods) showed some clusters constituted by (Chordata/(Echinodermata/Hemichordata)) or (Plathelminthes/(Annelida/...Continue Reading

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Citations

Feb 11, 2020·Frontiers in Physiology·J Kirsikka SillanpääKristina Sundell
Feb 21, 2021·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Christopher D MoyesR Meldrum Robertson

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