title: Sequence analysis of cloned cDNA for rat substance P precursor: existence of a third substance P precursor.
abstract: The sequence of the mRNA for the rat substance P precursor (preprotachykinin A) has been elucidated by molecular cloning and sequence analysis. The deduced amino acid sequence of rat preprotachykinin A indicates that it contains both substance P and substance K but differs in the sequence organization from either bovine alpha- or beta-preprotachykinin A reported previously. The existence of the bovine mRNA for the third preprotachykinin A has thus been examined and evidenced by the isolation of the corresponding cDNA clone. This mRNA, named gamma-preprotachykinin A mRNA, deletes the sequence precisely corresponding to the exon 4 sequence of the preprotachykinin A gene. Thus, alternative RNA splicing in the expression of the single preprotachykinin A gene results in the generation of three different forms of the preprotachykinin A mRNAs.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002417:Cattle; D003001:Cloning, Molecular; D004247:DNA / Q000032:analysis*; D004262:DNA Restriction Enzymes / Q000378:metabolism; D009479:Neuropeptides / Q000235:genetics*; D011498:Protein Precursors / Q000235:genetics*; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D013373:Substance P / Q000096:biosynthesis*; D015320:Tachykinins
chemical_list: D009479:Neuropeptides; D011498:Protein Precursors; D012333:RNA, Messenger; D015320:Tachykinins; C044206:preprotachykinin; D013373:Substance P; D004247:DNA; D004262:DNA Restriction Enzymes