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Hepatocellular localisation of biosynthesis of vitronectin. Characterisation of the primary structure of rat vitronectin

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Author: Otter, M. · Kuiper, J. · Rijken, D. · Zonneveld, A.-J. van
Institution: TNO Preventie en Gezondheid
Source:Biochemistry and Molecular Biology International, 3, 37, 563-572
Identifier: 233125
Keywords: Biology · cDNA · Competitive PCR · Liver · Localisation · Rat · Vitronectin · complementary dna · hemopexin · heparin binding protein · somatomedin b · vitronectin · amino acid sequence · animal cell · article · carboxy terminal sequence · cell type · consensus sequence · dna library · endothelium cell · kupffer cell · liver cell · male · nonhuman · polymerase chain reaction · protein expression · protein localization · protein synthesis · rabbit · rat · sequence homology · Amino Acid Sequence · Animals · Base Sequence · Cloning, Molecular · DNA, Complementary · Endothelium · Genetic Code · Humans · Kupffer Cells · Liver · Male · Mice · Molecular Sequence Data · Polymerase Chain Reaction · Rabbits · Rats · Sequence Homology, Amino Acid · Structure-Activity Relationship · Vitronectin


To characterize the primary structure of rat Vn, a cDNA library constructed from freshly isolated rat hepatocytes, was screened with a human Vn cDNA probe. Comparison of the sequence of the obtained rat cDNA clone with the sequences of human, mouse and rabbit Vn cDNA's showed predominantly consensus in the somatomedin B domain, the RGD-sequence and its flanking regions, in the first hemopexin type domain and at the carboxyl terminal part of Vn, the heparin binding site. To specify the liver cell type involved in the biosynthesis of Vn, we used a competitive PCR-assay to discriminate between expression levels. We found that expression of Vn in hepatocytes is at least 1000-fold higher than in Kupffer cells and 3000-fold higher than in endothelial liver cells. Chemicals/CAS: DNA, Complementary; Vitronectin