| Autor: |
Xu L; Howard Hughes Medical Institute, University of California at San Diego, La Jolla 92093-0648, USA., Lavinsky RM, Dasen JS, Flynn SE, McInerney EM, Mullen TM, Heinzel T, Szeto D, Korzus E, Kurokawa R, Aggarwal AK, Rose DW, Glass CK, Rosenfeld MG |
| Jazyk: |
angličtina |
| Zdroj: |
Nature [Nature] 1998 Sep 17; Vol. 395 (6699), pp. 301-6. |
| DOI: |
10.1038/26270 |
| Abstrakt: |
POU-domain proteins, such as the pituitary-specific factor Pit-1, are members of the homeodomain family of proteins which are important in development and homeostasis, acting constitutively or in response to signal-transduction pathways to either repress or activate the expression of specific genes. Here we show that whereas homeodomain-containing repressors such as Rpx2 seem to recruit only a co-repressor complex, the activity of Pit-1 is determined by a regulated balance between a co-repressor complex that contains N-CoR/SMRT, mSin3A/B and histone deacetylases, and a co-activator complex that includes the CREB-binding protein (CBP) and p/CAF. Activation of Pit-1 by cyclic AMP or growth factors depends on distinct amino- and carboxy-terminal domains of CBP, respectively. Furthermore, the histone acetyltransferase functions of CBP or p/CAF are required for Pit-1 function that is stimulated by cyclic AMP or growth factors, respectively. These data show that there is a switch in specific requirements for histone acetyltransferases and CBP domains in mediating the effects of different signal-transduction pathways on specific DNA-bound transcription factors. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
