| First Author | Denisenko ON | Year | 1996 |
| Journal | J Biol Chem | Volume | 271 |
| Issue | 44 | Pages | 27701-6 |
| PubMed ID | 8910362 | Mgi Jnum | J:36496 |
| Mgi Id | MGI:83923 | Doi | 10.1074/jbc.271.44.27701 |
| Citation | Denisenko ON, et al. (1996) Zik1, a transcriptional repressor that interacts with the heterogeneous nuclear ribonucleoprotein particle K protein. J Biol Chem 271(44):27701-6 |
| abstractText | The heterogeneous nuclear ribonucleoprotein particle (hnRNP) K protein is comprised of multiple modular domains that serve to engage a diverse group of molecular partners including DNA, RNA, the product of the proto-oncogene vav, and tyrosine and serine/threonine kinases. To identify additional K protein molecular partners and to further understand its function, we used a fragment of K protein as a bait in the yeast two-hybrid screen. The deduced primary structure of one of the positive clones revealed a novel zinc finger protein, hereby denoted as Zik1. In addition to the nine contiguous zinc fingers in the C terminus, Zik1 contains a KRAB-A domain thought to be involved in transcriptional repression. Zik1 and K protein bound in vitro and co-immunoprecipitated from cell extracts indicating that in vivo their interaction is direct. Expression of Gal4 DNA-binding domain-Zik1 fusion protein repressed a gene promoter bearing Gal4-binding elements, indicating that from cognate DNA elements Zik1 is a transcriptional repressor. The known diverse nature of K protein molecular interactions and now the identification of a K protein partner that is a transcriptional repressor lends support to the notion that K protein is a remarkably versatile molecule that may be acting as a docking platform to facilitate communication among molecules involved in signal transduction and gene expression. |
