Change in binding affinities of 3Y1 secreted fibronectin upon desulfation of tyrosine-O-sulfate.
Desulfated form of the 3Y1 secreted fibronectin was prepared by treatment with arylsulfatases. Under optimal conditions, the degrees of tyrosine-desulfation of [35S]sulfate-labeled fibronectin by arylsulfatases from Helix pomatia (Type H-1), Patalle vulgata (Type V) and Abalone entrails (Type VIII) were determined to be 55.7%, 54.9% and 76.4%. Upon desulfation of [3H]leucine-labeled fibronectin by Type H-1 or Type V arylsulfatase, gelatin-binding affinity remained unchanged; while heparin-binding affinity increased nearly 50%. Treatment with Type VIII arylsulfatase caused a considerable decrease in gelatin-binding and a slight decrease in heparin-binding affinities. Nevertheless, desulfation by all three enzymes consistently resulted in a dramatic decrease of fibrin-binding affinity, ranging from 42.1% to 64.4%.
Suiko
M
M
Miyazaki University, Japan.
Liu
M C
MC
D000818:Animals; D001192:Arylsulfatases / Q000378:metabolism*; D002460:Cell Line; D005337:Fibrin / Q000378:metabolism; D005353:Fibronectins / Q000378:metabolism*; D005780:Gelatin / Q000378:metabolism; D006493:Heparin / Q000378:metabolism; D011485:Protein Binding; D013429:Sulfatases / Q000378:metabolism*; D014443:Tyrosine / Q000031:analogs & derivatives*
D005353:Fibronectins; C005662:tyrosine O-sulfate; D014443:Tyrosine; D005780:Gelatin; D005337:Fibrin; D006493:Heparin; D013429:Sulfatases; D001192:Arylsulfatases