Nucleic Acids Research, 1984, Vol. 12, No. 10 4207-4228
© 1984
MOLECULAR BIOLOGY |
Isolation of cDNA and genomic DNA clones encoding type II collagen
1Laboratory of Developmental Biology and Anomalies, National Institute of Dental Research Bethesda, MD 20205, USA 2National Eye Institute, National Institutes of Health Bethesda, MD 20205, USA 3 Genex, Rockville, MD, USA
Received January 13, 1984. Revised April 18, 1984. Accepted April 18, 1984.
A cDNA library constructed from total chick embryo RNA was screened with an enriched fraction of type II collagen mRNA. Two overlapping cDNA clones were characterized and shown to encode the COOH propeptide of type II collagen. In addition, a type II collagen clone was isolated from a Charon 4A library of chick genomic fragments. Definitive identification of the clones was based on DNA sequence analysis. The 3' end of the type II collagen gene appears to be similar to that of other interstitial collagen genes. Northern hybridization data indicates that there is a marked decrease in type II collagen mRNA levels in chondrocytes treated with the dedifferentiating agent 5-bromodeoxyuridine. The major type II collagen mRNA species is 5300 bases long, similar to that of other interstitial collagen RNAs.
*Current address: Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20205, USA
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