RGD Reference Report - Complete amino acid sequence of subunit e of rat liver mitochondrial H(+)-ATP synthase. - Rat Genome Database

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Complete amino acid sequence of subunit e of rat liver mitochondrial H(+)-ATP synthase.

Authors: Higuti, T  Kuroiwa, K  Kawamura, Y  Yoshihara, Y 
Citation: Higuti T, etal., Biochemistry 1992 Dec 15;31(49):12451-4.
RGD ID: 632028
Pubmed: PMID:1463732   (View Abstract at PubMed)

Subunit e of H(+)-ATP synthase from rat liver mitochondria was isolated from the purified enzyme by reverse-phase high-performance liquid chromatography. The amino acid sequence of the subunit was determined by automated Edman degradation of the whole protein and derived peptides. The nucleotide sequence of the import precursor of subunit e of rat liver H(+)-ATP synthase was determined from a recombinant cDNA clone isolated by screening a rat hepatoma cell line H4TG cDNA library with a probe DNA. The sequence was composed of 289 nucleotides including a coding region for the import precursor of subunit e and noncoding regions on the 5'- and 3'-sides. The possible import precursor of subunit e and its mature polypeptide deduced from the open reading frame consisted of 71 and 70 amino acid residues with molecular weights of 8254 and 8123, respectively. Subunit e is a basic hydrophilic protein with an isoelectric point of 9.78. The sequence of the rat subunit e is highly homologous with that of subunit e of bovine heart, but has no homology with any subunit of bacterial or chloroplast H(+)-ATP synthase. The function of subunit e is unknown. However, a homology search in the database of the National Biomedical Research Foundation revealed that residues 34-65 of subunit e are homologous with residues 90-117 of troponin T, and with residues 529-561 of h-caldesmon and residues 289-319 of l-caldesmon, which are the homologous sequences corresponding to the Ca(2+)-dependent tropomyosin-binding region of troponin T.

Objects referenced in this article
Gene Atp5me ATP synthase membrane subunit e Rattus norvegicus

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