Wnt10b promoter was constructed by inserting a PCR
product of mouse genomic DNA into the pGL3.0 vector (Promega, Madison, WI).
mwnt10b-luc (a plasmid containing 705 to +216 bp DNA
sequence of mouse Wnt10b promoter constructed by inserting a PCR product of
mouse genomic DNA into the pGL3.0 vector) was a gift from Dr. D. J. Klemm,
University of Colorado, Denver. Other shortened constructs were subcloned
based on the construct of mwnt10b-luc (2000 bp to +216 bp).
The amplification template for all mutations is the
mwnt10b-luc (705 to +216 bp). The NFAT binding site
(5′-AGGAAAA-3′) at 282 to 276 bp was changed to
5′-AGcttAA-3′ using the Q5 Site-Directed Mutagenesis Kit (New
England BioLabs). Similarly, the SMAD binding site
(5′-GTCTAGA-3′) at 341 to 335 bp was mutated to
5′-catagcg-3′. The primers used are provided in