Chromosomal rearrangement generating a composite gene for a developmental transcription factor.

Chromosomal rearrangement generating a composite gene for a developmental transcription factor.
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染色体重排产生发育转录因子的复合基因。

DOI:
10.1126/science.2536191
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发表时间:
1989
期刊:
影响因子:
56.9
通讯作者:
R. Losick
R. Losick
中科院分区:
综合性期刊1区
文献类型:
--
作者:
P. Stragier;B. Kunkel;L. Kroos;R. Losick

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枯草芽孢杆菌孢子细胞母细胞室中的差异基因表达部分由称为 sigma K(或 sigma 27)的 RNA 聚合酶 sigma 因子决定。根据纯化蛋白的部分氨基末端氨基酸序列,将sigma K因子指定为孢子形成基因spoIVCB的产物。 spoIVCB 基因现在被证明是一个截短的基因,只能指定 sigma K 的氨基末端一半。羧基末端一半由另一个孢子形成基因 spoIIIC 指定,spoIVCB 在孢子形成的中间阶段通过 5 碱基对重复序列内的位点特异性重组而与该基因结合在读码框内。 spoIVCB 和 spoIIIC 的并置不需要是可逆的,因为母细胞及其染色体在发育周期结束时被丢弃。染色体DNA的重排可以解释西格玛K在母细胞中选择性存在的原因,并且可能是在细胞经历终末分化的其他发育系统中产生细胞类型特异性调节蛋白的先例。
Differential gene expression in the mother cell chamber of sporulating cells of Bacillus subtilis is determined in part by an RNA polymerase sigma factor called sigma K (or sigma 27). The sigma K factor was assigned as the product of the sporulation gene spoIVCB on the basis of the partial aminoterminal amino acid sequence of the purified protein. The spoIVCB gene is now shown to be a truncated gene capable of specifying only the amino terminal half of sigma K. The carboxyl terminal half is specified by another sporulation gene, spoIIIC, to which spoIVCB becomes joined inframe at an intermediate stage of sporulation by site-specific recombination within a 5-base pair repeated sequence. Juxtaposition of spoIVCB and spoIIIC need not be reversible in that the mother cell and its chromosome are discarded at the end of the developmental cycle. The rearrangement of chromosomal DNA could account for the presence of sigma K selectively in the mother cell and may be a precedent for the generation of cell type-specific regulatory proteins in other developmental systems where cells undergo terminal differentiation.
DOI: 10.1016/0022-2836(87)90506-7
发表时间: 1987-07-05
影响因子: 5.6
作者:
DONOVAN, W;ZHENG, L;LOSICK, R
通讯作者: LOSICK, R
枯草芽孢杆菌孢子形成过程中参与区室化基因表达的新西格玛因子的鉴定。
DOI: 10.1101/gad.3.2.141
发表时间: 1989
影响因子: 10.5
作者:
Sun,DX;Stragier,P;Setlow,P
通讯作者: Setlow,P
DOI: 10.1126/science.2492118
发表时间: 1989-01-27
期刊: SCIENCE
影响因子: 56.9
作者:
KROOS, L;KUNKEL, B;LOSICK, R
通讯作者: LOSICK, R