Pi, a pre-B-cell-specific enhancer element in the immunoglobulin heavy-chain enhancer.

Pi, a pre-B-cell-specific enhancer element in the immunoglobulin heavy-chain enhancer.
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Pi,免疫球蛋白重链增强子中的前 B 细胞特异性增强子元件。

DOI:
10.1128/mcb.13.10.5957-5969.1993
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发表时间:
1993
影响因子:
5.3
通讯作者:
Baltimore,D
Baltimore,D
中科院分区:
生物学2区
文献类型:
--
作者:
Libermann,TA;Baltimore,D

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我们在μE2和μE3元件之间鉴定了一个新的免疫球蛋白重链增强子元件,命名为π。π增强子元件主要在B细胞发育的早期阶段具有转录活性,但在免疫球蛋白κ轻链基因重排阶段的B细胞成熟过程中变得几乎无活性。突变分析表明,π元件在前B细胞阶段对免疫球蛋白重链增强子活性至关重要,但在成熟B细胞或浆细胞阶段对增强子活性几乎不相关。π增强子元件的活性与明显的前B细胞特异性蛋白-DNA复合物的存在相关。π位点与etsgene家族成员识别序列的相似性表明,与π位点相互作用的蛋白质很可能是etsgene相关的转录因子。
We have identified a new immunoglobulin heavy-chain enhancer element, designated π, between the μE2 and μE3 elements. The π enhancer element is transcriptionally active primarily during early stages of B-cell development but becomes virtually inactive during B-cell maturation at about the stage of immunoglobulin κ light-chain gene rearrangement. Mutational analysis suggests that the π element is crucial for immunoglobulin heavy-chain enhancer activity at the pre-B-cell stage but is almost irrelevant for enhancer activity at the mature B-cell or plasma-cell stage. The activity of the π enhancer element correlates with the presence of an apparently pre-B-cell-specific protein-DNA complex. The similarity of the π site to recognition sequences for members of theetsgene family suggests that the protein(s) interacting with the π site most likely areets-related transcription factors.
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