Ets-1 is a transcription factor which belongs to the ETS family. Its mRNA i
s expressed in the embryo during normal development and also in tumors. In
order to sort out functional Ets-1-binding sites among those present in gen
e promoters, we constructed an expression vector and designed a purificatio
n protocol for the production of the 440-amino-acid form of mouse Ets-1, ba
sed on heparin-Sepharose affinity and anion-exchange chromatographies. This
protocol allows the purification of large amounts of pure recombinant prot
ein as assessed by SDS-PAGE, C18 reverse-phase HPLC, amino-terminal sequenc
ing, and mass spectrometry. The purified protein is recognized by specific
anti-Ets-1 antibodies and binds to DNA ETS-binding sites. (C) 2001 Academic
Press.