Paulsson M, Dziadek M, Suchanek C, Huttner WB, Timpl R. Nature of sulphated macromolecules in mouse Reichert's membrane. Evidence for tyrosine O-sulphate in basement-membrane proteins.
Biochem J 1985;
231:571-9. [PMID:
4074325 PMCID:
PMC1152789 DOI:
10.1042/bj2310571]
[Citation(s) in RCA: 67] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Seven different sulphated macromolecules were detected in 6 M-guanidinium chloride extracts of metabolically [35S]sulphate-labelled mouse Reichert's membrane and were partially separated. Polypeptide bands of apparent Mr 50 000, 150 000 (tentatively identified as entactin) and 170 000 contained essentially tyrosine O-sulphate as the labelled component. Most of the radioactive sulphate was incorporated into three different proteoglycans, which could be separated by chromatography and density-gradient centrifugation before and after enzymic degradation. Enzymic analysis of glycosaminoglycans and of protein cores by immunoassays identified these components as low-density and high-density forms of heparan sulphate proteoglycan and a high-density form of chondroitin sulphate or dermatan sulphate proteoglycan.
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