The S. mutans mntE gene encodes a manganese efflux transporter.
The S. mutans mntE gene encodes a manganese efflux transporter.
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DOI:
10.1111/omi.12286
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发表时间:
2020-06
影响因子:
3.7
通讯作者:
Spatafora G
中科院分区:
文献类型:
--
作者:
O'Brien J;Pastora A;Stoner A;Spatafora G
Streptococcus mutans is a colonizer of the human dentition, and under conditions of dysbiosis is the primary causative agent of dental caries. The pathogenic potential of S. mutans depends, in part, on its ability to regulate the transport of metal ions across the plasma membrane to maintain intracellular metal ion homeostasis. Research in our laboratory has focused on the Mn2+-specific SloC lipoprotein importer and its regulator encoded by the S. mutans sloR gene. Herein, we used a bioinformatics approach to identify a gene on the S. mutans UA159 chromosome, SMU_1176, as a metal ion efflux transporter that contributes to S. mutans manganese ion homeostasis. Metal ion sensitivity assays performed with the wild-type S. mutans UA159 strain and an isogenic SMU_1176 insertion-deletion mutant, called GMS3000, revealed significantly heightened sensitivity of GMS3000 to MnSO4 challenge. 54Mn uptake experiments support the accumulation of 54Mn in GMS3000 cell pellets when compared to 54Mn concentrations in UA159 or in a complemented strain of GMS3000, called GMS3001. Inductively coupled plasma mass spectrometry (ICP-MS) studies were performed in parallel to quantify intracellular manganese concentrations in these strains, the results of which corroborate the 54Mn uptake studies, and support the SMU_1176 gene product as a Mn2+ efflux protein. Expression profiling experiments revealed de-repression of SMU_1176 gene transcription in the SloR-deficient GMS584 strain of S. mutans, especially under high manganese conditions. In conclusion, the S. mutans SMU_1176 gene, which we renamed mntE, is a manganese efflux transporter that contributes to essential metal ion homeostasis as part of the SloR regulon.
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影响因子:
3.6
作者:
Hohle TH;O'Brian MR
通讯作者:
O'Brian MR
影响因子:
6.4
作者:
Grunenwald, Caroline M.;Choby, Jacob E.;Skaar, Eric P.
通讯作者:
Skaar, Eric P.
影响因子:
3.2
作者:
Kreth, Jens;Zhang, Yongshu;Herzberg, Mark C.
通讯作者:
Herzberg, Mark C.
影响因子:
3.2
作者:
NAKAYAMA, K
通讯作者:
NAKAYAMA, K
DOI:
10.1007/s10534-015-9826-z
发表时间:
2015-06
期刊:
Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine
影响因子:
--
作者:
Eijkelkamp BA;McDevitt CA;Kitten T
通讯作者:
Kitten T