FADD-DED filaments coordinate complex IIa assembly during TNF-induced apoptosis
マップデータ
FADD-DED filament
試料
複合体: FADD-DED filament
複合体: FADD-filament
タンパク質・ペプチド: FAS-associated death domain protein
キーワード
RNA recognition / RNA helicase / ATP hydrolysis / RLR signaling / IMMUNE SYSTEM
機能・相同性
機能・相同性情報
positive regulation of CD8-positive, alpha-beta cytotoxic T cell extravasation / negative regulation of activation-induced cell death of T cells / death effector domain binding / tumor necrosis factor receptor superfamily binding / FasL/ CD95L signaling / TRAIL signaling / CD95 death-inducing signaling complex / death-inducing signaling complex assembly / ripoptosome / Defective RIPK1-mediated regulated necrosis ...positive regulation of CD8-positive, alpha-beta cytotoxic T cell extravasation / negative regulation of activation-induced cell death of T cells / death effector domain binding / tumor necrosis factor receptor superfamily binding / FasL/ CD95L signaling / TRAIL signaling / CD95 death-inducing signaling complex / death-inducing signaling complex assembly / ripoptosome / Defective RIPK1-mediated regulated necrosis / TRAIL-activated apoptotic signaling pathway / caspase binding / TRIF-mediated programmed cell death / Regulation by c-FLIP / CASP8 activity is inhibited / Dimerization of procaspase-8 / TLR3-mediated TICAM1-dependent programmed cell death / positive regulation of adaptive immune response / Caspase activation via Death Receptors in the presence of ligand / positive regulation of macrophage differentiation / necroptotic signaling pathway / NF-kB activation through FADD/RIP-1 pathway mediated by caspase-8 and -10 / death-inducing signaling complex / receptor serine/threonine kinase binding / negative regulation of necroptotic process / positive regulation of type I interferon-mediated signaling pathway / tumor necrosis factor receptor binding / death receptor binding / positive regulation of innate immune response / positive regulation of extrinsic apoptotic signaling pathway / TNFR1-induced proapoptotic signaling / motor neuron apoptotic process / RIPK1-mediated regulated necrosis / positive regulation of activated T cell proliferation / T cell homeostasis / positive regulation of proteolysis / extrinsic apoptotic signaling pathway via death domain receptors / positive regulation of execution phase of apoptosis / lymph node development / behavioral response to cocaine / spleen development / extrinsic apoptotic signaling pathway / signaling adaptor activity / extrinsic apoptotic signaling pathway in absence of ligand / thymus development / positive regulation of interleukin-8 production / apoptotic signaling pathway / kidney development / Regulation of TNFR1 signaling / cellular response to mechanical stimulus / Regulation of necroptotic cell death / positive regulation of T cell mediated cytotoxicity / cytoplasmic side of plasma membrane / positive regulation of type II interferon production / positive regulation of tumor necrosis factor production / T cell differentiation in thymus / cell body / protease binding / protein-macromolecule adaptor activity / defense response to virus / positive regulation of canonical NF-kappaB signal transduction / positive regulation of apoptotic process / innate immune response / apoptotic process / protein-containing complex binding / positive regulation of transcription by RNA polymerase II / identical protein binding / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能
FADD / : / Death effector domain / Death effector domain / Death effector domain (DED) profile. / Death effector domain / Death domain profile. / DEATH domain, found in proteins involved in cell death (apoptosis). / Death domain / Death domain / Death-like domain superfamily 類似検索 - ドメイン・相同性
ジャーナル: Proc Natl Acad Sci U S A / 年: 2025 タイトル: DED filaments coordinate complex IIa assembly during TNF-induced apoptosis. 著者: Ying Chen / Vinh Thang Huynh / Lihua Lai / Ping Liu / Tongyang Li / Yaw Bia Tan / Che Shin Chew / Amhed Missael Vargas Velazquez / Firdaus Samsudin / Jan K Marzinek / Peter J Bond / Bin Wu / ...著者: Ying Chen / Vinh Thang Huynh / Lihua Lai / Ping Liu / Tongyang Li / Yaw Bia Tan / Che Shin Chew / Amhed Missael Vargas Velazquez / Firdaus Samsudin / Jan K Marzinek / Peter J Bond / Bin Wu / Dahai Luo / Vinay Tergaonkar / 要旨: Extrinsic apoptosis is initiated by signaling from death receptors, leading to the assembly of RIPK1, FADD, and caspase-8 complex. Subsequently, caspase-8 forms a filamentous structure through the ...Extrinsic apoptosis is initiated by signaling from death receptors, leading to the assembly of RIPK1, FADD, and caspase-8 complex. Subsequently, caspase-8 forms a filamentous structure through the oligomerization of its tandem death effector domain (tDED), resulting in caspase activation and cell death. Although the DED of FADD (DED) is homologous to the tDEDs of caspase-8 (tDED) and both oligomerize to function, the functional form of DED oligomer in extrinsic apoptosis remains unclear. Here, using cryogenic-electron microscopy, we elucidate the structure of DED filaments comprising three helical chains assembled through three types of iterative interactions. Mutations disrupting DED filament formation impair the recruitment of RIPK1 and caspase-8, and abrogate the cell death response, suggesting that DED filamentation represents an important mechanistic step in the initiation of TNF-induced extrinsic apoptosis. Contrary to the belief that the homotypic death domains of RIPK1 and FADD are solely responsible for their interaction, we here show this interaction requires DED filamentation. Furthermore, cFLIP can disrupt DED filaments, uncovering an additional antiapoptotic mechanism of cFLIP beyond its disruption of caspase-8 filament. Molecular dynamics simulations reveal that DED filament thermodynamically favors tDED monomer over DED monomer, thus explaining the hierarchy and stoichiometry of FADD/caspase-8 complex assembly. These findings highlight the hitherto unappreciated roles of DED filament formation in extrinsic apoptosis.