Cryo-EM of human Arp2/3 complexes provides structural insights into actin nucleation modulation by ARPC5 isoforms
Cryo-EM of human Arp2/3 complexes provides structural insights into actin nucleation modulation by ARPC5 isoforms
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人类 Arp2/3 复合物的冷冻电镜为 ARPC5 异构体对肌动蛋白成核的调节提供了结构见解
DOI:
10.1101/2020.05.01.071704
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Von Loeffelholz O
中科院分区:
文献类型:
--
作者:
Von Loeffelholz O
The Arp2/3 complex regulates many cellular processes by stimulating formation of branched actin filament networks. Because three of its seven subunits exist as two different isoforms, mammals produce a family of Arp2/3 complexes with different properties that may be suited to different physiological contexts. To shed light on how isoform diversification affects Arp2/3 function, we determined a 4.2 Å resolution cryo-EM structure of the most active human Arp2/3 complex containing ARPC1B and ARPC5L, and compared it with the structure of the least active ARPC1A-ARPC5-containing complex. The architecture of each isoform-specific Arp2/3 complex is the same. Strikingly, however, the N-terminal half of ARPC5L is partially disordered compared to ARPC5, suggesting that this region of ARPC5/ARPC5L is an important determinant of complex activity. Confirming this idea, the nucleation activity of Arp2/3 complexes containing hybrid ARPC5/ARPC5L subunits is higher when the ARPC5L N-terminus is present, thereby providing insight into activity differences between the different Arp2/3 complexes.
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影响因子:
5.6
作者:
Sokolova OS;Chemeris A;Guo S;Alioto SL;Gandhi M;Padrick S;Pechnikova E;David V;Gautreau A;Goode BL
通讯作者:
Goode BL
DOI:
10.1097/iae.0000000000001602
发表时间:
2017
期刊:
Retina (Philadelphia, Pa.)
影响因子:
--
作者:
Todorich,Bozho;Thanos,Aristomenis;Yonekawa,Yoshihiro;Thomas,BenjaminJ;Faia,LisaJ;Chang,Emmanuel;Shulman,Julia;Olsen,KarlR;Blair,MichaelP;Shapiro,MichaelP;Ferrone,Philip;Vajzovic,Lejla;Toth,CynthiaA;Lee,ThomasC;Robinson,
通讯作者:
Robinson,
影响因子:
20.3
作者:
P. L. Brito;É. Gotardo;H. Chweih;W. A. Ferreira;F. C. Leonardo;C. Franco;Mariana Gonçalves Oliveira;E. Antunes;F. Costa;N. Conran
通讯作者:
N. Conran
影响因子:
48
作者:
Schindelin, Johannes;Arganda-Carreras, Ignacio;Frise, Erwin;Kaynig, Verena;Longair, Mark;Pietzsch, Tobias;Preibisch, Stephan;Rueden, Curtis;Saalfeld, Stephan;Schmid, Benjamin;Tinevez, Jean-Yves;White, Daniel James;Hartenstein, Volker;Eliceiri, Kevin;Tomancak, Pavel;Cardona, Albert
通讯作者:
Cardona, Albert
影响因子:
5.7
作者:
Topf, Maya;Lasker, Keren;Sali, Andrej
通讯作者:
Sali, Andrej