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  • Title: Isolation and characterization of cDNA clones encoding rat skeletal muscle peptidylarginine deiminase.
    Author: Watanabe K, Senshu T.
    Journal: J Biol Chem; 1989 Sep 15; 264(26):15255-60. PubMed ID: 2768262.
    Abstract:
    Various mammalian tissues contain protein-arginine deiminases (EC 3.5.3.15), which convert the arginine residues in normal peptide bonds to the citrulline residues in calcium ion-dependent manners. Here, we describe the complete primary structure of rat skeletal muscle peptidylarginine deiminase deduced from the sequences of its cDNA clones isolated by recombinant DNA technology. We have isolated three overlapping cDNA clones which constitute a 4,507-base pair cDNA sequence including a 2,452-base pair 3'-untranslated region. The coding region consists of 1,995 base pairs encoding 665 amino acid residues. A potential N-linked glycosylation site is present at asparagine-534. The molecular weight of the enzyme calculated from the deduced amino acid sequence is 75,122. Direct repeat sequences resembling the rodent B2 type repetitive sequences appear in the 3'-untranslated region (nucleotides 3,090-3,198 and 3,270-3,391). Northern hybridization demonstrated the presence of its mRNA in poly(A)+ fractions of spinal cord, cerebrum, cerebellum, and submaxillary gland as well as skeletal muscle. The sizes of peptidylarginine deiminase mRNAs in these tissues were estimated to be 4.5-5.0 kilobases. No positive bands were detected on the blots of the corresponding RNA fractions of liver and kidney. Possible similarity of the amino acid sequence of peptidylarginine deiminase to those of other calcium binding proteins is discussed.
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