Proteolytic release of human angiotensin-converting enzyme. Localization of the cleavage site

V. Beldent, A. Michaud, L. Wei, M. T. Chauvet, P. Corvol

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

Angiotensin-converting enzyme (EC 3.4.15.1, ACE) is a transmembrane protein with a short carboxyl-terminal cytoplasmic domain, a 17-amino acid hydrophobic anchor domain, and a large N-terminal extracellular region containing two catalytically homologous domains. An active soluble form of ACE circulates in human plasma and is produced in culture medium of Chinese hamster ovary (CHO) cells transfected with the full-length human ACE cDNA. The mechanism of ACE release in CHO cells involves a post-translational proteolytic cleavage occurring in the carboxyl-terminal region. The carboxyl terminus of the secreted recombinant ACE, AGQR, was established by carboxyl- terminal microsequencing and corresponds to a cleavage site between Arg-1137 and Leu-1138. Two independent studies confirmed this proposed cleavage site: amino acid analysis of a carboxyl-terminal peptide derived from soluble ACE and immunocharacterization of membrane-bound and soluble ACE with antibodies raised against three peptides located along the carboxyl-terminal ACE sequence. In order to assess the importance of Arg-1137, this amino acid was mutated to a glutamine residue. This mutation did not prevent the secretion of ACE, suggesting that the solubilizing enzyme can accommodate this change or can use an alternative cleavage site. Finally, the production of soluble ACE in CHO cells appears to be proportional to the level of cellular ACE, implying that the solubilizing enzyme is not a limiting factor. In addition, the carboxyl-terminal sequence of the human plasma ACE was identified as AGQR, thus supporting the fact that a similar mechanism could operate in human vascular cells.

Original languageEnglish (US)
Pages (from-to)26428-26434
Number of pages7
JournalJournal of Biological Chemistry
Volume268
Issue number35
StatePublished - Jan 1 1993

Fingerprint

Peptidyl-Dipeptidase A
Plasma (human)
Cricetulus
Amino Acids
Ovary
Peptides
Enzymes
Anchors
Glutamine
Culture Media
Complementary DNA
Cells
Membranes
Blood Vessels
Antibodies
Mutation
Proteins

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Beldent, V., Michaud, A., Wei, L., Chauvet, M. T., & Corvol, P. (1993). Proteolytic release of human angiotensin-converting enzyme. Localization of the cleavage site. Journal of Biological Chemistry, 268(35), 26428-26434.

Proteolytic release of human angiotensin-converting enzyme. Localization of the cleavage site. / Beldent, V.; Michaud, A.; Wei, L.; Chauvet, M. T.; Corvol, P.

In: Journal of Biological Chemistry, Vol. 268, No. 35, 01.01.1993, p. 26428-26434.

Research output: Contribution to journalArticle

Beldent, V, Michaud, A, Wei, L, Chauvet, MT & Corvol, P 1993, 'Proteolytic release of human angiotensin-converting enzyme. Localization of the cleavage site', Journal of Biological Chemistry, vol. 268, no. 35, pp. 26428-26434.
Beldent, V. ; Michaud, A. ; Wei, L. ; Chauvet, M. T. ; Corvol, P. / Proteolytic release of human angiotensin-converting enzyme. Localization of the cleavage site. In: Journal of Biological Chemistry. 1993 ; Vol. 268, No. 35. pp. 26428-26434.
@article{e9a2206ad538474882c3f198ea13f337,
title = "Proteolytic release of human angiotensin-converting enzyme. Localization of the cleavage site",
abstract = "Angiotensin-converting enzyme (EC 3.4.15.1, ACE) is a transmembrane protein with a short carboxyl-terminal cytoplasmic domain, a 17-amino acid hydrophobic anchor domain, and a large N-terminal extracellular region containing two catalytically homologous domains. An active soluble form of ACE circulates in human plasma and is produced in culture medium of Chinese hamster ovary (CHO) cells transfected with the full-length human ACE cDNA. The mechanism of ACE release in CHO cells involves a post-translational proteolytic cleavage occurring in the carboxyl-terminal region. The carboxyl terminus of the secreted recombinant ACE, AGQR, was established by carboxyl- terminal microsequencing and corresponds to a cleavage site between Arg-1137 and Leu-1138. Two independent studies confirmed this proposed cleavage site: amino acid analysis of a carboxyl-terminal peptide derived from soluble ACE and immunocharacterization of membrane-bound and soluble ACE with antibodies raised against three peptides located along the carboxyl-terminal ACE sequence. In order to assess the importance of Arg-1137, this amino acid was mutated to a glutamine residue. This mutation did not prevent the secretion of ACE, suggesting that the solubilizing enzyme can accommodate this change or can use an alternative cleavage site. Finally, the production of soluble ACE in CHO cells appears to be proportional to the level of cellular ACE, implying that the solubilizing enzyme is not a limiting factor. In addition, the carboxyl-terminal sequence of the human plasma ACE was identified as AGQR, thus supporting the fact that a similar mechanism could operate in human vascular cells.",
author = "V. Beldent and A. Michaud and L. Wei and Chauvet, {M. T.} and P. Corvol",
year = "1993",
month = "1",
day = "1",
language = "English (US)",
volume = "268",
pages = "26428--26434",
journal = "Journal of Biological Chemistry",
issn = "0021-9258",
publisher = "American Society for Biochemistry and Molecular Biology Inc.",
number = "35",

}

TY - JOUR

T1 - Proteolytic release of human angiotensin-converting enzyme. Localization of the cleavage site

AU - Beldent, V.

AU - Michaud, A.

AU - Wei, L.

AU - Chauvet, M. T.

AU - Corvol, P.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - Angiotensin-converting enzyme (EC 3.4.15.1, ACE) is a transmembrane protein with a short carboxyl-terminal cytoplasmic domain, a 17-amino acid hydrophobic anchor domain, and a large N-terminal extracellular region containing two catalytically homologous domains. An active soluble form of ACE circulates in human plasma and is produced in culture medium of Chinese hamster ovary (CHO) cells transfected with the full-length human ACE cDNA. The mechanism of ACE release in CHO cells involves a post-translational proteolytic cleavage occurring in the carboxyl-terminal region. The carboxyl terminus of the secreted recombinant ACE, AGQR, was established by carboxyl- terminal microsequencing and corresponds to a cleavage site between Arg-1137 and Leu-1138. Two independent studies confirmed this proposed cleavage site: amino acid analysis of a carboxyl-terminal peptide derived from soluble ACE and immunocharacterization of membrane-bound and soluble ACE with antibodies raised against three peptides located along the carboxyl-terminal ACE sequence. In order to assess the importance of Arg-1137, this amino acid was mutated to a glutamine residue. This mutation did not prevent the secretion of ACE, suggesting that the solubilizing enzyme can accommodate this change or can use an alternative cleavage site. Finally, the production of soluble ACE in CHO cells appears to be proportional to the level of cellular ACE, implying that the solubilizing enzyme is not a limiting factor. In addition, the carboxyl-terminal sequence of the human plasma ACE was identified as AGQR, thus supporting the fact that a similar mechanism could operate in human vascular cells.

AB - Angiotensin-converting enzyme (EC 3.4.15.1, ACE) is a transmembrane protein with a short carboxyl-terminal cytoplasmic domain, a 17-amino acid hydrophobic anchor domain, and a large N-terminal extracellular region containing two catalytically homologous domains. An active soluble form of ACE circulates in human plasma and is produced in culture medium of Chinese hamster ovary (CHO) cells transfected with the full-length human ACE cDNA. The mechanism of ACE release in CHO cells involves a post-translational proteolytic cleavage occurring in the carboxyl-terminal region. The carboxyl terminus of the secreted recombinant ACE, AGQR, was established by carboxyl- terminal microsequencing and corresponds to a cleavage site between Arg-1137 and Leu-1138. Two independent studies confirmed this proposed cleavage site: amino acid analysis of a carboxyl-terminal peptide derived from soluble ACE and immunocharacterization of membrane-bound and soluble ACE with antibodies raised against three peptides located along the carboxyl-terminal ACE sequence. In order to assess the importance of Arg-1137, this amino acid was mutated to a glutamine residue. This mutation did not prevent the secretion of ACE, suggesting that the solubilizing enzyme can accommodate this change or can use an alternative cleavage site. Finally, the production of soluble ACE in CHO cells appears to be proportional to the level of cellular ACE, implying that the solubilizing enzyme is not a limiting factor. In addition, the carboxyl-terminal sequence of the human plasma ACE was identified as AGQR, thus supporting the fact that a similar mechanism could operate in human vascular cells.

UR - http://www.scopus.com/inward/record.url?scp=0027376535&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027376535&partnerID=8YFLogxK

M3 - Article

C2 - 8253769

AN - SCOPUS:0027376535

VL - 268

SP - 26428

EP - 26434

JO - Journal of Biological Chemistry

JF - Journal of Biological Chemistry

SN - 0021-9258

IS - 35

ER -