Initiation site binding protein and the initiator-like promoter element of mouse mammary tumor virus.
The mouse mammary tumor virus (MMTV) promoter contains an element near its transcription initiation site that is recognized by a protein termed initiation site binding protein (ISBP). Spacing between the TATA box and the ISBP site is important for MMTV promoter function, as altered spacing results in heterogeneity in start site selection in vitro and in vivo. The sequence of the ISBP site is related to initiator elements common in many RNA polymerase II promoters. However, binding of partially purified ISBP to several promoters that contain well-characterized initiator elements was not detected; these promoters included binding sites for a number of previously identified initiator-binding proteins. Partially purified ISBP did, however, bind with high affinity to sequences near the initiation sites of the SV40 major late and adenovirus 2 E1B promoters.
Fee
Brian E
BE
Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843-2128, USA.
Steinke
John W
JW
Pierce
Jennifer
J
Peterson
David O
DO
D000818:Animals; D001483:Base Sequence; D002417:Cattle; D004279:DNA, Viral; D004268:DNA-Binding Proteins / Q000378:metabolism*; D008324:Mammary Tumor Virus, Mouse / Q000235:genetics*; D051379:Mice; D008969:Molecular Sequence Data; D016296:Mutagenesis; D009687:Nuclear Proteins / Q000378:metabolism*; D011401:Promoter Regions, Genetic; D016385:TATA Box; D024363:Transcription Initiation Site
D004279:DNA, Viral; D004268:DNA-Binding Proteins; D009687:Nuclear Proteins