Formin-generated actomyosin arcs propel T cell receptor microcluster movement at the immune synapse.

Formin-generated actomyosin arcs propel T cell receptor microcluster movement at the immune synapse.
复制标题

DOI:
10.1083/jcb.201603080
复制
发表时间:
2016-11-07
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Hammer JA
Hammer JA
中科院分区:
其他
文献类型:
--
作者:
Murugesan S;Hong J;Yi J;Li D;Beach JR;Shao L;Meinhardt J;Madison G;Wu X;Betzig E;Hammer JA

文献摘要

参考文献

被引文献

相似文献

Murugesan等人报道T细胞突触处的肌动球蛋白弧是由福尔马林产生的结构,其直接推动T细胞受体簇运动。作者揭示了突触成熟过程中主要细胞骨架网络的起源、组织和功能。免疫突触(IS)平面中的肌动蛋白组装和向内流动驱动T细胞受体微簇(TCR MC)和整合素白细胞功能抗原1(LFA-1)的集中。使用结构照明显微镜(SIM),我们表明,肌动蛋白弧填充内侧,层状区域的IS产生的线性肌动蛋白丝产生的一个或多个formin存在于IS远端边缘。在穿过外,Arp 2/3产生的,片状伪足样区域的IS,这些线性丝肌球蛋白II组织成反平行的同心弧。三维SIM显示活性LFA-1通常与弧对齐,而TCR MCs通常位于弧之间,全内反射荧光SIM显示TCR MCs被弧向内扫过。一致地,通过抑制肌动蛋白而破坏肌动蛋白弧的形成导致较少集中的TCR MC、错误分离的整合素簇、降低的T-B细胞粘附和减少的TCR信号传导。总之,我们的研究结果定义的起源,组织,和功能的重要性,一个主要的肌动球蛋白收缩结构的IS,直接推动TCR MC运输。
Murugesan et al. report that actomyosin arcs at the T cell synapse are formin-generated structures that directly propel T cell receptor cluster movement. The authors reveal the origin, organization, and functions of a major cytoskeletal network during synapse maturation. Actin assembly and inward flow in the plane of the immunological synapse (IS) drives the centralization of T cell receptor microclusters (TCR MCs) and the integrin leukocyte functional antigen 1 (LFA-1). Using structured-illumination microscopy (SIM), we show that actin arcs populating the medial, lamella-like region of the IS arise from linear actin filaments generated by one or more formins present at the IS distal edge. After traversing the outer, Arp2/3-generated, lamellipodia-like region of the IS, these linear filaments are organized by myosin II into antiparallel concentric arcs. Three-dimensional SIM shows that active LFA-1 often aligns with arcs, whereas TCR MCs commonly reside between arcs, and total internal reflection fluorescence SIM shows TCR MCs being swept inward by arcs. Consistently, disrupting actin arc formation via formin inhibition results in less centralized TCR MCs, missegregated integrin clusters, decreased T–B cell adhesion, and diminished TCR signaling. Together, our results define the origin, organization, and functional significance of a major actomyosin contractile structure at the IS that directly propels TCR MC transport.
DOI: 10.1529/biophysj.107.119099
发表时间: 2008-04-15
影响因子: 3.4
作者:
DeMond, Andrew L.;Mossman, Kaspar D.;Groves, Jay T.
通讯作者: Groves, Jay T.
DOI: 10.1083/jcb.201406120
发表时间: 2015-02-16
期刊: The Journal of cell biology
影响因子: --
作者:
Comrie WA;Li S;Boyle S;Burkhardt JK
通讯作者: Burkhardt JK
DOI: 10.1083/jcb.201406121
发表时间: 2015-02-16
期刊: The Journal of cell biology
影响因子: --
作者:
Comrie WA;Babich A;Burkhardt JK
通讯作者: Burkhardt JK
DOI: 10.1083/jcb.201201018
发表时间: 2012-06-11
期刊: The Journal of cell biology
影响因子: --
作者:
Babich A;Li S;O'Connor RS;Milone MC;Freedman BD;Burkhardt JK
通讯作者: Burkhardt JK
DOI: 10.1073/pnas.0902621106
发表时间: 2009-08-04
影响因子: 11.1
作者:
Hartman, Nina C.;Nye, Jeffrey A.;Groves, Jay T.
通讯作者: Groves, Jay T.