Nucleotide sequence of cloned cDNAs encoding chicken preproparathyroid hormone

Sundeep Khosla, Marie Demay, Mark Pines, Shmuel Hurwitz, John T. Potts, Henry M. Kronenberg

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

In order to characterize an avian parathyroid hormone gene, a λgt10 cDNA library constructed from chicken parathyroid gland mRNA was screened with a human preproparathyroid hormone (preproPTH) cDNA probe. Nucleotide sequence analysis of three independent clones confirmed that they encoded chicken preproPTH. This analysis, complemented by primer extension and Northern blot analysis of mRNA, demonstrated a 5′‐untranslated region for chicken preproPTH of 127 nucleotides, a coding region of 357 nucleotides, and a 3′‐untranslated region of approximately 2500 nucleotides. The coding sequence predicts a mature chicken PTH of 88 amino acids in contrast to the 84 amino acids of the mammalian hormones. Comparison of the avian and the mammalian hormones shows striking homology in the region of amino acids 1–32. The middle and carboxyl‐terminal portions of chicken PTH, however, differ considerably from the mammalian hormones and include deletions of sequences conserved in mammalian PTH and insertions of novel peptide sequences. Comparison of the avian and mammalian structures suggests potential alterations of the mammalian sequences that may lead to altered bioactivity and/or hormone metabolism.

Original languageEnglish (US)
Pages (from-to)689-698
Number of pages10
JournalJournal of Bone and Mineral Research
Volume3
Issue number6
DOIs
StatePublished - Dec 1988

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Orthopedics and Sports Medicine

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