Divergent evolution of Di-lysine ER retention vs. farnesylation motif-mediated anchoring of the AnkB virulence effector to the Legionella-containing vacuolar membrane.
Divergent evolution of Di-lysine ER retention vs. farnesylation motif-mediated anchoring of the AnkB virulence effector to the Legionella-containing vacuolar membrane.
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DOI:
10.1038/s41598-017-05211-5
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发表时间:
2017-07-11
影响因子:
4.6
通讯作者:
Kwaik YA
中科院分区:
文献类型:
--
作者:
Perpich JD;Kalia A;Price CTD;Jones SC;Wong K;Gehring K;Kwaik YA
Within macrophages and amoeba, the Legionella-containing vacuole (LCV) membrane is derived from the ER. The bona fide F-box AnkB effector protein of L. pneumophila strain AA100/130b is anchored to the cytosolic side of the LCV membrane through host-mediated farnesylation of its C-terminal eukaryotic “CaaX” motif. Here we show that the AnkB homologue of the Paris strain has a frame shift mutation that led to a loss of the CaaX motif and a concurrent generation of a unique C-terminal KNKYAP motif, which resembles the eukaryotic di-lysine ER-retention motif (KxKxx). Our phylogenetic analyses indicate that environmental isolates of L. pneumophila have a potential positive selection for the ER-retention KNKYAP motif. The AnkB-Paris effector is localized to the LCV membrane most likely through the ER-retention motif. Its ectopic expression in HEK293T cells localizes it to the perinuclear ER region and it trans-rescues the ankB mutant of strain AA100/130b in intra-vacuolar replication. The di-lysine ER retention motif of AnkB-Paris is indispensable for function; most likely as an ER retention motif that enables anchoring to the ER-derived LCV membrane. Our findings show divergent evolution of the ankB allele in exploiting either host farnesylation or the ER retention motif to be anchored into the LCV membrane.
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影响因子:
5.7
作者:
Hoppe J;Ünal CM;Thiem S;Grimpe L;Goldmann T;Gaßler N;Richter M;Shevchuk O;Steinert M
通讯作者:
Steinert M
影响因子:
15.9
作者:
Al-Khodor S;Price CT;Kalia A;Abu Kwaik Y
通讯作者:
Abu Kwaik Y
影响因子:
3.1
作者:
Isaac DT;Isberg R
通讯作者:
Isberg R
影响因子:
4.4
作者:
Bruckert, William M.;Abu Kwaik, Yousef
通讯作者:
Abu Kwaik, Yousef
影响因子:
5.2
作者:
Luo ZQ
通讯作者:
Luo ZQ