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• W1567493631 abstract "The purification of a 68-kDa hyaluronic acid-binding protein (HA-binding protein), a homodimer of 34 kDa that binds specifically to hyaluronic acid, has been reported earlier by us (Gupta, S., Batchu, R. B., and Datta, K. (1991) Eur. J. Cell Biol. 56, 58-67). Here, we report the isolation of a partial cDNA clone from a λ gt11 cDNA expression library of human skin fibroblast by immunoscreening with HA-binding protein antiserum. The internal polypeptide sequence (83 residues) of the purified hyaluronic acid-binding protein is identical to the predicted protein sequence derived from hyaluronic acid-binding protein cDNA, suggesting the authenticity of the clone. Interestingly, this hyaluronic acid-binding protein cDNA sequence has complete homology with the cDNA sequence of a protein P-32, co-purified with the human pre-mRNA splicing factor SF2 (Krainer, A. R., 5eda, A., Kozak, D., and Binns, G.(1991) Cell 66, 383-394). Furthermore, the data on the N-terminal sequence of hyaluronic acid-binding protein and the predicted polypeptide of P-32 revealed the identical coding sequence of 209 amino acids for both the proteins. As the identity and functional characterization of P-32 have not yet been reported, P-32 cDNA was expressed in Escherichia coli, and the recombinant P-32 protein was purified by hyaluronic acid-Sepharose affinity chromatography. The recombinant P-32 protein showed immunocross-reactivity with the polyclonal antibodies raised against HA-binding protein. The predicted amino acid sequence of the protein fulfilled the minimal criteria for binding to hyaluronic acid, i.e. two basic amino acids flanking a seven-amino acid stretch, as reported for other hyaluronic acid-binding proteins. Furthermore, the hyaluronic acid affinity of the recombinant P-32 protein was confirmed by biotinylated hyaluronic acid binding assay. The binding of recombinant P-32 protein to biotinylated hyaluronic acid can be competed only with excess unlabeled hyaluronic acid, confirming its specificity toward hyaluronic acid. All these results suggest that both P-32, co-purified with the human pre-mRNA splicing factor SF2, and 34-kDa hyaluronic acid-binding protein reported by us are the same protein and that it is a new member of the hyaluronic acid- binding protein family, the “hyaladherins.” The purification of a 68-kDa hyaluronic acid-binding protein (HA-binding protein), a homodimer of 34 kDa that binds specifically to hyaluronic acid, has been reported earlier by us (Gupta, S., Batchu, R. B., and Datta, K. (1991) Eur. J. Cell Biol. 56, 58-67). Here, we report the isolation of a partial cDNA clone from a λ gt11 cDNA expression library of human skin fibroblast by immunoscreening with HA-binding protein antiserum. The internal polypeptide sequence (83 residues) of the purified hyaluronic acid-binding protein is identical to the predicted protein sequence derived from hyaluronic acid-binding protein cDNA, suggesting the authenticity of the clone. Interestingly, this hyaluronic acid-binding protein cDNA sequence has complete homology with the cDNA sequence of a protein P-32, co-purified with the human pre-mRNA splicing factor SF2 (Krainer, A. R., 5eda, A., Kozak, D., and Binns, G.(1991) Cell 66, 383-394). Furthermore, the data on the N-terminal sequence of hyaluronic acid-binding protein and the predicted polypeptide of P-32 revealed the identical coding sequence of 209 amino acids for both the proteins. As the identity and functional characterization of P-32 have not yet been reported, P-32 cDNA was expressed in Escherichia coli, and the recombinant P-32 protein was purified by hyaluronic acid-Sepharose affinity chromatography. The recombinant P-32 protein showed immunocross-reactivity with the polyclonal antibodies raised against HA-binding protein. The predicted amino acid sequence of the protein fulfilled the minimal criteria for binding to hyaluronic acid, i.e. two basic amino acids flanking a seven-amino acid stretch, as reported for other hyaluronic acid-binding proteins. Furthermore, the hyaluronic acid affinity of the recombinant P-32 protein was confirmed by biotinylated hyaluronic acid binding assay. The binding of recombinant P-32 protein to biotinylated hyaluronic acid can be competed only with excess unlabeled hyaluronic acid, confirming its specificity toward hyaluronic acid. All these results suggest that both P-32, co-purified with the human pre-mRNA splicing factor SF2, and 34-kDa hyaluronic acid-binding protein reported by us are the same protein and that it is a new member of the hyaluronic acid- binding protein family, the “hyaladherins.”" @default.
• W1567493631 created "2016-06-24" @default.
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• W1567493631 date "1996-01-01" @default.
• W1567493631 modified "2023-10-16" @default.
• W1567493631 title "Molecular Cloning of Human Fibroblast Hyaluronic Acid-binding Protein Confirms Its Identity with P-32, a Protein Co-purified with Splicing Factor SF2" @default.
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• W1567493631 doi "https://doi.org/10.1074/jbc.271.4.2206" @default.
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