The chondroitin sulfate proteoglycan NG2 is a tumour-specific antigen on the chemically induced rat chondrosarcoma HSN
✍ Scribed by Olivier Léger; Caroline Johnson-Léger; Elizabeth Jackson; Brian Coles; Christopher Dean
- Book ID
- 102868048
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- French
- Weight
- 704 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0020-7136
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✦ Synopsis
N-terminal sequences of 19 and 11 amino acids obtained from 2 different tryptic fragments of the tumour-specific antigen on the chemically induced rat chondrosarcoma HSN show a 100% homology with the rat chondroitin sulfate proteoglycan NG2. Using a scheme of overlapping oligonucleotide primers we have cloned by PCR amplification the cDNA for the specific antigen of the HSN tumour that is immunogenic in immunocompetent CBH/Cbi rats and now report that its cDNA sequence is identical to that of NG2. The cDNA codes for a transmembrane protein of 2,325 amino acids with a large extracellular domain of 2,224 amino acids containing 2 cysteine-rich regions, a transmembrane domain (25 amino acids) and a short cytoplasmic tail (76 amino acids). The tumour-specific determinant was found to lie between amino acid residues 556 and 992 on the core glycoprotein.