Nucleic Acids Research, 1989, Vol. 17, No. 5 1845-1863
© 1989
MOLECULAR BIOLOGY |
Anti-OTF-1 antibodies inhibit NFIII stimulation of in vitro adenovirus DNA replication
Laboratory for Physiological Chemistry, State University of Utrecht Vondellaan 24a, 3521 GG Utrecht, The Netherlands 1European Molecular Biiology Laboratory Meyerhofstrasse 1, 6900 Heidelberg, FRG
Received January 18, 1989. Revised February 13, 1989.
HeLa cell OTF-1 has been purified on the basis of its DNA binding activity and used to raise a polyclonal rabbit antiserum. This antiserum is shown to recognize both native and denatured OTF-1 from both human and a similar protein from Xenopus culture cells, but to react either more weakly or not at all with the lyniphoid cell-specific OTF-2. Separately, NFIII has been purified on the basis of its ability to stimulate Adenovirus DNA replication in vitro. On denaturing polyacrylamide gels OTF-1 and NFIII exhibit identical mobility. Anti-OTF-1 antiserum recognizes NFIII and neutralizes its stimulatory effect on DNA replication. Moreover, OTF-1 can functionally replace NFIII. Taken together with previously published DNA binding data, this indicates that OTF-1 and NFIII are either very closely related or identical.
*Present address: Department of Biochemistry, University of Nijmegen, Trigon, PO Box 9101, 6500 HB Nijmegen, The Netherlands