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    FEBS Lett. 1987 Oct 19;223(1):74-6.

    Sequence of an intestinal cDNA encoding human motilin precursor.

    Seino Y, Tanaka K, Takeda J, Takahashi H, Mitani T, Kurono M, Kayano T, Koh G, Fukumoto H, Yano H, et al.

    Division of Metabolism and Clinical Nutrition, Kyoto University School of Medicine, Japan.

    A cDNA clone encoding the human motilin precursor was isolated from an intestinal library using synthetic oligonucleotide probes. The predicted amino acid sequence indicates that the motilin precursor consists of 115 amino acids and includes a 25-residue N-terminal signal peptide followed by the 22-amino-acid motilin sequence and a long, 68-residue C-terminal peptide. The amino acid sequence of human motilin predicted from the cDNA sequence is identical to its porcine counterpart, which has been determined by protein sequencing. Proteolytic processing of promotilin to motilin occurs at the sequence, Lys-Lys, this being the first reported instance of processing occurring at a pair of Lys residues. In other precursors it occurs at Lys-Arg, Arg-Arg, Arg, or very rarely Lys.

    PMID: 3666144 [PubMed - indexed for MEDLINE]

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