Mycobacterium tuberculosis lipoprotein LprG (Rv1411c) binds triacylated glycolipid agonists of Toll-like receptor 2.
Mycobacterium tuberculosis lipoprotein LprG (Rv1411c) binds triacylated glycolipid agonists of Toll-like receptor 2.
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DOI:
10.1038/nsmb.1869
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发表时间:
2010-09
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
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Knockout of lprG results in decreased virulence of Mycobacterium tuberculosis (Mtb) in mice. Mtb lipoprotein LprG has TLR2 agonist activity, thought to be dependent on its N-terminal triacylation. Surprisingly, here we find that non-acylated LprG retains TLR2 activity. Moreover, we show LprG association with triacylated glycolipid TLR2 agonists lipoarabinomannan, lipomannan and phosphatidylinositol mannosides (which share core structures). Binding of triacylated species was specific to LprG (not LprA) and increased LprG TLR2 agonist activity; conversely, association of glycolipids with LprG enhanced their recognition by TLR2. The crystal structure of LprG in complex with phosphatidylinositol mannoside revealed a hydrophobic pocket that accommodates the three alkyl chains of the ligand. In conclusion, we demonstrate a glycolipid binding function of LprG that enhances recognition of triacylated Mtb glycolipids by TLR2 and may affect glycolipid assembly or transport for bacterial cell wall biogenesis.
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影响因子:
4.8
作者:
Flo, TH;Ryan, L;Espevik, T
通讯作者:
Espevik, T
DOI:
10.1179/096805104225006273
发表时间:
2004-01-01
期刊:
JOURNAL OF ENDOTOXIN RESEARCH
影响因子:
--
作者:
Finberg, RW;Re, F;Kurt-Jones, EA
通讯作者:
Kurt-Jones, EA
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
3.2
作者:
Farrow, Mary F.;Rubin, Eric J.
通讯作者:
Rubin, Eric J.
影响因子:
4.1
作者:
Nigou, J;Gilleron, M;Puzo, G
通讯作者:
Puzo, G