| First Author | Sanz L | Year | 1995 |
| Journal | Mol Cell Biol | Volume | 15 |
| Issue | 6 | Pages | 3164-70 |
| PubMed ID | 7760812 | Mgi Jnum | J:25491 |
| Mgi Id | MGI:73207 | Doi | 10.1128/mcb.15.6.3164 |
| Citation | Sanz L, et al. (1995) Molecular characterization of a novel transcription factor that controls stromelysin expression. Mol Cell Biol 15(6):3164-70 |
| abstractText | Stromelysins, which are the metalloproteinases with the widest substrate specificities, play a critical role in tumor invasion and metastasis. We have previously reported an element (SPRE) of the stromelysin promoter located between nucleotides -1221 and -1203 that is necessary and sufficient for the control of stromelysin gene expression by mitogenic activation, which induces a nuclear activity that binds to this sequence. Using a concatenated probe with several copies of this element to screen a lambda gt11 cDNA expression library from mouse Swiss 3T3 fibroblasts, we report here the molecular cloning of a cDNA coding for a novel protein (SPBP) of 937 amino acids that binds to this element and has several features of a transcription factor, such as a putative leucine zipper region, a nuclear localization signal, and a basic domain with homology to the DNA-binding domains of Fos and Jun. Evidence that SPBP is at least a critical component of the mitogen-induced SPRE nuclear binding activity is presented here. Furthermore, the transfection of an expression plasmid for SPBP transactivates reporter chloramphenicol acetyltransferase plasmids containing either the full-length stromelysin promoter or a single copy of the SPRE cloned upstream of the herpes simplex virus thymidine kinase minimal promoter. Therefore, the results presented here identify a novel transcription factor critically involved in the control of stromelysin expression. |
