J. Biol. Chem., Vol. 261, Issue 18, 8108-8111, Jun, 1986
Partial cDNA sequence encoding a globular domain at the C terminus of the rat cartilage proteoglycan
K Doege, P Fernandez, JR Hassell, M Sasaki and Y Yamada
We have isolated and sequenced a cDNA clone of 872 base pairs from the 3'
end of the mRNA for the large cartilage specific proteoglycan from rat.
Identification was confirmed by a comparison with published protein
sequence. Hybridization analysis shows the presence of an 8-9- kilobase
mRNA for this proteoglycan in rat and chick sternal chondrocytes and rat
chondrosarcoma cells, but not in RNA from rat fibroblasts, vitamin
A-treated chick chondrocytes, chick crop, or bone. The carboxyl portion of
the proteoglycan is deduced to terminate in a globular domain, which
includes a region homologous to a chick hepatic lectin, and is possibly
involved in binding to N-acetylglucosamine. The clone extends into a region
where serines are clustered, probably the start of the chondroitin
sulfate-rich region.