Identification and NH2-terminal amino acid sequence of three insulin-like growth factor-binding proteins in porcine serum

M. E. Coleman, Y. C.E. Pan, T. D. Etherton

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Three distinct species of IGFBP in porcine serum were identified by NH2-terminal amino acid sequence analysis. The IGFBPs identified include pIGFBP-2 (34 kDa), three isoforms of pIGFBP-3 (43, 40 and 30 kDa) and two isoforms of pIGFBP-4 (30 and 26 kDa). The three isoforms of pIGFBP-3 were found to have a common NH2-terminal amino acid sequence, as were the two isoforms of pIGFBP-4. These results indicate that porcine serum contains a truncated form of IGFBP-3 and two forms of pIGFBP-4, similar to those previously isolated from human and rat serum. Furthermore, the presence of a truncated form(s) of the GH-dependent IGFBP-3 in porcine serum suggests that elucidating its origin and function may be important in understanding how IGFBPs affect the somatogenic actions of GH.

Original languageEnglish (US)
Pages (from-to)1131-1136
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume181
Issue number3
DOIs
StatePublished - Dec 31 1991

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

Fingerprint Dive into the research topics of 'Identification and NH<sub>2</sub>-terminal amino acid sequence of three insulin-like growth factor-binding proteins in porcine serum'. Together they form a unique fingerprint.

  • Cite this