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. 1990 Nov;87(22):8835–8839. doi: 10.1073/pnas.87.22.8835

Molecular cloning of the large subunit of transforming growth factor type beta masking protein and expression of the mRNA in various rat tissues.

T Tsuji 1, F Okada 1, K Yamaguchi 1, T Nakamura 1
PMCID: PMC55054  PMID: 2247454

Abstract

Masking protein (MP), which neutralizes the activity of transforming growth factor type beta 1 (TGF-beta 1), is composed of a dimeric N-terminal part of a TGF-beta 1 precursor of Mr 39,000 and an unknown large subunit of Mr 105,000-120,000. The deduced primary structure of the MP large subunit was elucidated by determining the nucleotide sequence of its cDNA. The cDNA encodes a prepro-precursor of 1712 amino acid residues with a calculated Mr of 186,596. The mature large subunit seems to be derived proteolytically from a prepro-precursor and the calculated Mr is 91,606. The precursor has seven N-linked glycosylation sites and an unusual structure containing 18 epidermal growth factor-like domains and four cysteine-rich internal repeats. The large subunit mRNA is synthesized in parallel with the expression of TGF-beta 1 mRNA in various rat tissues.

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Selected References

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