An inverse correlation between expression of a preprocathepsin B-related protein with cysteine-rich sequences and steroid 11β-hydroxylase in adrenocortical cells

Kuniaki Mukai, Fumiko Mitani, Hideko Nagasawa, Reiko Suzuki, Tsuneharu Suzuki, Makoto Suematsu, Yuzuru Ishimura

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A cDNA encoding a secretory protein hitherto unknown was cloned from mouse adrenocortical cells by subtractive hybridization between the cells without and with expressing steroid 1113-hydroxylase (Cyp11b-1), a marker for the functional differentiation of cells in the zonae fasciculata reticularis (zFR). The deduced protein consisting of 466 amino acids contained a secretory signal, epidermal growth factor-like repeats, and a proteolytically inactive cathepsin B-related sequence. The amino acid sequence was 89% identical with that of human tubulointerstitial nephritis antigen-related protein. Among the mouse organs examined, adrenal glands prominently expressed its mRNA. The mRNA and its encoded protein were detected in the outer adrenocortical zones that do not express Cyp11b-1, i.e. the zona glomerulosa and the undifferentiated cell zone, while being undetectable in zFR that express Cyp11b-1. The new protein was designated as adrenocortical zonation factor 1 (AZ-1). Clonal lines with different levels of AZ-1 expression were established from Y-1 adrenocortical cells that originally express Cyp11b-1 but little AZ-1. Analyses of the clonal lines revealed that Cyp11b-1 is detected in the clonal lines maintaining little AZ-1 expression and becomes undetectable in those expressing AZ-1. On the other hand, irrespective of the AZ-1 expression, all clones expressed cholesterol side-chain cleavage enzyme, which occurs throughout the cortical zones. These results demonstrated that adrenocortical cells expressing AZ-1 do not express Cyp11b-1, whereas those with little AZ-1 express this zFR marker in vitro and in vivo, implying a putative role of AZ-1 in determining the zonal differentiation of adrenocortical cells.

Original languageEnglish
Pages (from-to)17084-17092
Number of pages9
JournalJournal of Biological Chemistry
Volume278
Issue number19
DOIs
Publication statusPublished - 2003 May 9

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Steroid 11-beta-Hydroxylase
Cysteine
Zona Reticularis
Zona Fasciculata
Cells
Proteins
Cholesterol Side-Chain Cleavage Enzyme
Cell Differentiation
Amino Acids
Cathepsin B
Messenger RNA
Steroid Hydroxylases
Zona Glomerulosa
Mixed Function Oxygenases
Epidermal Growth Factor
Differentiation Antigens
Adrenal Glands
Complementary DNA
Steroids
Amino Acid Sequence

ASJC Scopus subject areas

  • Biochemistry

Cite this

An inverse correlation between expression of a preprocathepsin B-related protein with cysteine-rich sequences and steroid 11β-hydroxylase in adrenocortical cells. / Mukai, Kuniaki; Mitani, Fumiko; Nagasawa, Hideko; Suzuki, Reiko; Suzuki, Tsuneharu; Suematsu, Makoto; Ishimura, Yuzuru.

In: Journal of Biological Chemistry, Vol. 278, No. 19, 09.05.2003, p. 17084-17092.

Research output: Contribution to journalArticle

Mukai, Kuniaki ; Mitani, Fumiko ; Nagasawa, Hideko ; Suzuki, Reiko ; Suzuki, Tsuneharu ; Suematsu, Makoto ; Ishimura, Yuzuru. / An inverse correlation between expression of a preprocathepsin B-related protein with cysteine-rich sequences and steroid 11β-hydroxylase in adrenocortical cells. In: Journal of Biological Chemistry. 2003 ; Vol. 278, No. 19. pp. 17084-17092.
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