Entamoeba histolytica RacC selectively engages p21-activated kinase effectors.
Entamoeba histolytica RacC selectively engages p21-activated kinase effectors.
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DOI:
10.1021/bi501226f
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发表时间:
2015-01-20
期刊:
影响因子:
2.9
通讯作者:
Siderovski, David P.
中科院分区:
文献类型:
--
作者:
Bosch, Dustin E.;Siderovski, David P.
Rho family GTPases modulate actin cytoskeleton dynamics by signaling through multiple effectors, including the p21-activated kinases (PAKs). The intestinal parasite Entamoeba histolytica expresses ∼20 Rho family GTPases and seven isoforms of PAK, two of which have been implicated in pathogenesis-related processes such as amoebic motility and invasion and host cell phagocytosis. Here, we describe two previously unstudied PAK isoforms, EhPAK4 and EhPAK5, as highly specific effectors of EhRacC. A structural model based on 2.35 Å X-ray crystallographic data of a complex between EhRacCQ65L·GTP and the EhPAK4 p21 binding domain (PBD) reveals a fairly well-conserved Rho/effector interface despite deviation of the PBD α-helix. A structural comparison with EhRho1 in complex with EhFormin1 suggests likely determinants of Rho family GTPase signaling specificity in E. histolytica. These findings suggest a high degree of Rho family GTPase diversity and specificity in the single-cell parasite E. histolytica. Because PAKs regulate pathogenesis-related processes in E. histolytica, they may be valid pharmacologic targets for anti-amoebiasis drugs.
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影响因子:
4.1
作者:
Kimple, RJ;Willard, FS;Siderovski, DP
通讯作者:
Siderovski, DP
影响因子:
7.7
作者:
Labruyere, E;Galy, V;Guillén, N
通讯作者:
Guillén, N
影响因子:
3.1
作者:
Ghosh, SK;Samuelson, J
通讯作者:
Samuelson, J
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
4.8
作者:
Bosch, Dustin E.;Kimple, Adam J.;Siderovski, David P.
通讯作者:
Siderovski, David P.