Structure and function of an ADP-ribose-dependent transcriptional regulator of NAD metabolism.

Structure and function of an ADP-ribose-dependent transcriptional regulator of NAD metabolism.
复制标题

DOI:
10.1016/j.str.2009.05.012
复制
发表时间:
2009-07-15
期刊:
Structure (London, England : 1993)
影响因子:
--
通讯作者:
Zhang H
Zhang H
中科院分区:
其他
文献类型:
--
作者:
Huang N;De Ingeniis J;Galeazzi L;Mancini C;Korostelev YD;Rakhmaninova AB;Gelfand MS;Rodionov DA;Raffaelli N;Zhang H

文献摘要

参考文献

被引文献

相似文献

除了作为必需的氧化还原辅助因子的功能外,NAD还作为多种反应的可消耗底物,对许多细胞过程产生广泛影响。NAD内稳态似乎受到严格控制,但其调控机制尚不清楚。在这里,我们证明了先前预测的细菌转录调节因子NrtR在体外抑制NAD生物合成基因的转录。NAD代谢产物adp -核糖作为激活剂抑制NrtR抑制因子活性。细胞中存在高水平的adp核糖,表明细菌的NAD转换活跃,这可能通过抑制NrtR的抑制功能激活了NAD生物合成基因的表达。通过比较NrtR与DNA和adp核糖复合物的晶体结构,我们发现了一个“Nudix开关”元件,该元件可能在DNA结合的变构调节和NrtR的抑制功能中起关键作用。
Besides its function as an essential redox cofactor, NAD also serves as consumable substrate for several reactions with broad impact on many cellular processes. NAD homeostasis appears to be tightly controlled, but the mechanism of its regulation is little understood. Here we demonstrate that a previously predicted bacterial transcriptional regulator, NrtR, represses the transcription of NAD biosynthetic genes in vitro. The NAD metabolite ADP-ribose functions as an activator suppressing NrtR repressor activity. The presence of high ADP-ribose levels in the cell is indicative of active NAD turnover in bacteria, which could signal the activation of NAD biosynthetic gene expression via inhibiting the repressor function of NrtR. By comparing the crystal structures of NrtR in complex with DNA and with ADP-ribose, we identified a “Nudix switch” element that likely plays a critical role in the allosteric regulation of DNA binding and repressor function of NrtR.
DOI: 10.1107/s0907444999016352
发表时间: 2000-02-01
影响因子: 2.2
作者:
Dauter, Z;Dauter, M;Rajashankar, KR
通讯作者: Rajashankar, KR
DOI: 10.1016/j.jchromb.2005.05.002
发表时间: 2005-07-25
影响因子: 3
作者:
Gasser, A;Guse, AH
通讯作者: Guse, AH
DOI: 10.1006/bbrc.2000.3000
发表时间: 2000-07-05
影响因子: 3.1
作者:
Frye, RA
通讯作者: Frye, RA
DOI: 10.1016/0003-9861(75)90215-5
发表时间: 1975-01-01
影响因子: 3.9
作者:
EVERSE, J;EVERSE, KE;KAPLAN, NO
通讯作者: KAPLAN, NO
DOI: 10.1074/jbc.m506879200
发表时间: 2006-04-07
影响因子: 4.8
作者:
Kimoto, H;Fujii, Y;Taketo, A
通讯作者: Taketo, A