HIV-1 Tat protein directly induces mitochondrial membrane permeabilization and inactivates cytochrome c oxidase.
HIV-1 Tat protein directly induces mitochondrial membrane permeabilization and inactivates cytochrome c oxidase.
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HIV-1 TAT蛋白直接诱导线粒体膜通透性并灭活细胞色素C氧化酶。
DOI:
10.1038/cddis.2012.21
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发表时间:
2012-03-15
影响因子:
9
通讯作者:
中科院分区:
文献类型:
--
作者:
The Trans-activator protein (Tat) of human immunodeficiency virus (HIV) is a pleiotropic protein involved in different aspects of AIDS pathogenesis. As a number of viral proteins Tat is suspected to disturb mitochondrial function. We prepared pure synthetic full-length Tat by native chemical ligation (NCL), and Tat peptides, to evaluate their direct effects on isolated mitochondria. Submicromolar doses of synthetic Tat cause a rapid dissipation of the mitochondrial transmembrane potential (ΔΨm) as well as cytochrome c release in mitochondria isolated from mouse liver, heart, and brain. Accordingly, Tat decreases substrate oxidation by mitochondria isolated from these tissues, with oxygen uptake being initially restored by adding cytochrome c. The anion-channel inhibitor 4,4′-diisothiocyanostilbene-2,2′-disulfonic acid (DIDS) protects isolated mitochondria against Tat-induced mitochondrial membrane permeabilization (MMP), whereas ruthenium red, a ryanodine receptor blocker, does not. Pharmacologic inhibitors of the permeability transition pore, Bax/Bak inhibitors, and recombinant Bcl-2 and Bcl-XL proteins do not reduce Tat-induced MMP. We finally observed that Tat inhibits cytochrome c oxidase (COX) activity in disrupted mitochondria isolated from liver, heart, and brain of both mouse and human samples, making it the first described viral protein to be a potential COX inhibitor.
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影响因子:
56.9
作者:
DAWSON, PE;MUIR, TW;KENT, SBH
通讯作者:
KENT, SBH
DOI:
10.1073/pnas.90.16.7632
发表时间:
1993-08-15
影响因子:
11.1
作者:
FLORES, SC;MARECKI, JC;MCCORD, JM
通讯作者:
MCCORD, JM
DOI:
10.1084/jem.194.8.1097
发表时间:
2001-10-15
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Castedo M;Ferri KF;Blanco J;Roumier T;Larochette N;Barretina J;Amendola A;Nardacci R;Métivier D;Este JA;Piacentini M;Kroemer G
通讯作者:
Kroemer G
影响因子:
1.5
作者:
Cantaluppi, V;Biancone, L;Camussi, G
通讯作者:
Camussi, G
影响因子:
7.2
作者:
Brabant, Magali;Baux, Ludwig;Jacotot, Etienne
通讯作者:
Jacotot, Etienne