A role for divalent metal transporter (DMT1) in mitochondrial uptake of iron and manganese.
A role for divalent metal transporter (DMT1) in mitochondrial uptake of iron and manganese.
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DOI:
10.1038/s41598-017-18584-4
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发表时间:
2018-01-09
影响因子:
4.6
通讯作者:
Thévenod F
中科院分区:
文献类型:
--
作者:
Wolff NA;Garrick MD;Zhao L;Garrick LM;Ghio AJ;Thévenod F
Much of iron and manganese metabolism occurs in mitochondria. Uptake of redox-active iron must be tightly controlled, but little is known about how metal ions enter mitochondria. Recently, we established that the divalent metal transporter 1 (DMT1) is present in the outer mitochondrial membrane (OMM). Therefore we asked if it mediates Fe2+ and Mn2+ influx. Mitochondria were isolated from HEK293 cells permanently transfected with inducible rat DMT1 isoform 1 A/+IRE (HEK293-rDMT1). Fe2+-induced quenching of the dye PhenGreen™SK (PGSK) occurred in two phases, one of which reflected OMM DMT1 with stronger Fe2+ uptake after DMT1 overexpression. DMT1-specific quenching showed an apparent affinity of ~1.5 µM for Fe2+and was blocked by the DMT1 inhibitor CISMBI. Fe2+ influx reflected an imposed proton gradient, a response that was also observed in purified rat kidney cortex (rKC) mitochondria. Non-heme Fe accumulation assayed by ICPOES and stable 57Fe isotope incorporation by ICPMS were increased in HEK293-rDMT1 mitochondria. HEK293-rDMT1 mitochondria displayed higher 59Fe2+ and 54Mn2+ uptake relative to controls with 54Mn2+ uptake blocked by the DMT1 inhibitor XEN602. Such transport was defective in rKC mitochondria with the Belgrade (G185R) mutation. Thus, these results support a role for DMT1 in mitochondrial Fe2+ and Mn2+ acquisition.
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影响因子:
4.5
作者:
Mackenzie, B;Ujwal, ML;Hediger, MA
通讯作者:
Hediger, MA
影响因子:
15.9
作者:
Gunshin, H;Fujiwara, Y;Andrews, NC
通讯作者:
Andrews, NC
DOI:
10.1083/jcb.201602069
发表时间:
2016-09-26
期刊:
The Journal of cell biology
影响因子:
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作者:
Das A;Nag S;Mason AB;Barroso MM
通讯作者:
Barroso MM
DOI:
10.1016/j.bbamcr.2016.09.008
发表时间:
2016-12-01
影响因子:
5.1
作者:
Hamdi, Arnel;Roshan, Tariq M.;Ponka, Prem
通讯作者:
Ponka, Prem
影响因子:
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作者:
Montalbetti, Nicolas;Simonin, Alexandre;Hediger, Matthias A.
通讯作者:
Hediger, Matthias A.