title: Characterization of the precursor for Manduca sexta diuretic hormone Mas-DH.
abstract: We have isolated a cDNA clone encoding a precursor form of the diuretic hormone from the tobacco hornworm Manduca sexta (Mas-DH). Translation of the cDNA revealed a 138-amino acid precursor consisting of the Mas-DH amino acid sequence bounded by dibasic amino acid processing sites, a putative signal sequence, and additional peptide sequence on either side of the Mas-DH coding sequence. The region of the precursor upstream of the mature Mas-DH sequence shows limited (28%) homology to the cryptic region of the ovine corticotropin-releasing factor precursor. The Mas-DH RNA is 1.5-1.6 kilobases long; it is present in both the heads and bodies of adult and larval insects. In prewandering fifth stadium larvae, Mas-DH mRNA is expressed in brain, nerve cord, gut, and Malpighian tubules, but not in the fat body. There is a single genomic copy of the Mas-DH gene; the message is multiply spliced.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D007301:Insect Hormones / Q000235:genetics*; D008969:Molecular Sequence Data; D009036:Moths / Q000235:genetics*; D009424:Nervous System Physiological Phenomena; D009838:Oligodeoxyribonucleotides; D011061:Poly A / Q000032:analysis / Q000235:genetics; D016133:Polymerase Chain Reaction / Q000379:methods; D011498:Protein Precursors / Q000235:genetics*; D012313:RNA / Q000032:analysis / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D051381:Rats; D017386:Sequence Homology, Amino Acid
chemical_list: D007301:Insect Hormones; D009838:Oligodeoxyribonucleotides; D011498:Protein Precursors; D012333:RNA, Messenger; C078210:diuretic hormone Mas-DH precursor, Manduca sexta; D011061:Poly A; D012313:RNA; D004247:DNA