首页> 外文期刊>Molecular and Cellular Biology >Transcriptional Scaffold: CIITA Interacts with NF-Y, RFX, and CREB To Cause Stereospecific Regulation of the Class II Major Histocompatibility Complex Promoter
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Transcriptional Scaffold: CIITA Interacts with NF-Y, RFX, and CREB To Cause Stereospecific Regulation of the Class II Major Histocompatibility Complex Promoter

机译:转录支架:CIITA与NF-Y,RFX和CREB相互作用,引起II类主要组织相容性复合体启动子的立体定向调节。

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Scaffold molecules interact with multiple effectors to elicit specific signal transduction pathways. CIITA, a non-DNA-binding regulator of class II major histocompatibility complex (MHC) gene transcription, may serve as a transcriptional scaffold. Regulation of the class II MHC promoter by CIITA requires strict spatial-helical arrangements of the X and Y promoter elements. The X element binds RFX (RFX5/RFXANK-RFXB/RFXAP) and CREB, while Y binds NF-Y/CBF (NF-YA, NF-YB, and NF-YC). CIITA interacts with all three. In vivo analysis using both N-terminal and C-terminal deletion constructs identified critical domains of CIITA that are required for interaction with NF-YB, NF-YC, RFX5, RFXANK/RFXB, and CREB. We propose that binding of NF-Y/CBF, RFX, and CREB by CIITA results in a macromolecular complex which allows transcription factors to interact with the class II MHC promoter in a spatially and helically constrained fashion.
机译:支架分子与多个效应子相互作用以引发特定的信号转导途径。 CIITA是II类主要组织相容性复合体(MHC)基因转录的非DNA结合调节剂,可作为转录支架。 CIITA对II类MHC启动子的调控要求X和Y启动子元素的空间螺旋排列严格。 X元素结合RFX(RFX5 / RFXANK-RFXB / RFXAP)和CREB,而Y结合NF-Y / CBF(NF-YA,NF-YB和NF-YC)。 CIITA与这三者都互动。使用N端和C端缺失构建体进行的体内分析确定了CIITA的关键域,这些域是与NF-YB,NF-YC,RFX5,RFXANK / RFXB和CREB相互作用所必需的。我们建议通过CIITA结合NF-Y / CBF,RFX和CREB产生大分子复合物,该复合物允许转录因子以空间和螺旋形式与II类MHC启动子相互作用。

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