Manganese and Zinc Regulate Virulence Determinants in Borrelia burgdorferi
Manganese and Zinc Regulate Virulence Determinants in Borrelia burgdorferi
复制标题
锰和锌调节伯氏疏螺旋体的毒力决定因素
DOI:
10.1128/iai.00507-13
复制
发表时间:
2013-05
影响因子:
3.1
通讯作者:
Yang, X. Frank
中科院分区:
文献类型:
--
作者:
Yang, Youyun;Carrasco, Sebastian E.;Lou, Yongliang;Yang, X. Frank
ABSTRACT Borrelia burgdorferi, the causative agent of Lyme disease, must adapt to two diverse niches, an arthropod vector and a mammalian host. RpoS, an alternative sigma factor, plays a central role in spirochetal adaptation to the mammalian host by governing expression of many genes important for mammalian infection. B. burgdorferi is known to be unique in metal utilization, and little is known of the role of biologically available metals in B. burgdorferi. Here, we identified two transition metal ions, manganese (Mn2+) and zinc (Zn2+), that influenced regulation of RpoS. The intracellular Mn2+ level fluctuated approximately 20-fold under different conditions and inversely correlated with levels of RpoS and the major virulence factor OspC. Furthermore, an increase in intracellular Mn2+ repressed temperature-dependent induction of RpoS and OspC; this repression was overcome by an excess of Zn2+. Conversely, a decrease of intracellular Mn2+ by deletion of the Mn2+ transporter gene, bmtA, resulted in elevated levels of RpoS and OspC. Mn2+ affected RpoS through BosR, a Fur family homolog that is required for rpoS expression: elevated intracellular Mn2+ levels greatly reduced the level of BosR protein but not the level of bosR mRNA. Thus, Mn2+ and Zn2+ appeared to be important in modulation of the RpoS pathway that is essential to the life cycle of the Lyme disease spirochete. This finding supports the emerging notion that transition metals such as Mn2+ and Zn2+ play a critical role in regulation of virulence in bacteria.
登录
查看更多内容
DOI:
10.1073/pnas.92.7.2909
发表时间:
1995-03-28
影响因子:
11.1
作者:
SCHWAN, TG;PIESMAN, J;ROSA, PA
通讯作者:
ROSA, PA
影响因子:
3.2
作者:
Alexandra H. Smith;J. Blevins;Gulnaz N. Bachlani;Xiaofeng F. Yang;M. Norgard
通讯作者:
Alexandra H. Smith;J. Blevins;Gulnaz N. Bachlani;Xiaofeng F. Yang;M. Norgard
影响因子:
3.6
作者:
He M;Oman T;Xu H;Blevins J;Norgard MV;Yang XF
通讯作者:
Yang XF
DOI:
10.1016/s0021-9258(18)51040-1
发表时间:
1948-10
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
B. Vallée;J. Gibson
通讯作者:
B. Vallée;J. Gibson
影响因子:
3.6
作者:
Bourret TJ;Boylan JA;Lawrence KA;Gherardini FC
通讯作者:
Gherardini FC