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基本情報
登録情報 | データベース: PDB / ID: 8p2l | ||||||||||||
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タイトル | A CHIMERA construct containing human SARM1 ARM and SAM domains and C. elegans TIR domain. | ||||||||||||
![]() | NAD(+) hydrolase SARM1,NAD(+) hydrolase tir-1 | ||||||||||||
![]() | HYDROLASE / SARM1 / TIR-1 / C. elegans / neurodegeneration / cryo-EM / structural biology / NAD+ metabolism / axon Wallerian degeneration | ||||||||||||
機能・相同性 | ![]() serotonin biosynthetic process / extrinsic component of synaptic membrane / negative regulation of MyD88-independent toll-like receptor signaling pathway / NADP+ nucleosidase activity / MyD88-independent TLR4 cascade / Toll Like Receptor 3 (TLR3) Cascade / NAD+ catabolic process / NAD+ nucleosidase activity / antibacterial innate immune response / regulation of synapse pruning ...serotonin biosynthetic process / extrinsic component of synaptic membrane / negative regulation of MyD88-independent toll-like receptor signaling pathway / NADP+ nucleosidase activity / MyD88-independent TLR4 cascade / Toll Like Receptor 3 (TLR3) Cascade / NAD+ catabolic process / NAD+ nucleosidase activity / antibacterial innate immune response / regulation of synapse pruning / modification of postsynaptic structure / ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase / protein localization to mitochondrion / NAD+ nucleosidase activity, cyclic ADP-ribose generating / nervous system process / cell fate specification / 加水分解酵素; 糖加水分解酵素; N-グリコシル化合物加水分解酵素 / regulation of dendrite morphogenesis / defense response to fungus / response to glucose / response to axon injury / regulation of neuron apoptotic process / signaling adaptor activity / axon cytoplasm / TRAF6-mediated induction of TAK1 complex within TLR4 complex / Activation of IRF3, IRF7 mediated by TBK1, IKKε (IKBKE) / IKK complex recruitment mediated by RIP1 / neuromuscular junction / small GTPase binding / intracellular protein localization / nervous system development / cell-cell signaling / cell body / defense response to Gram-negative bacterium / microtubule / mitochondrial outer membrane / cell differentiation / defense response to bacterium / axon / negative regulation of gene expression / innate immune response / synapse / dendrite / positive regulation of gene expression / protein kinase binding / glutamatergic synapse / cell surface / signal transduction / positive regulation of transcription by RNA polymerase II / protein-containing complex / mitochondrion / identical protein binding / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||||||||
生物種 | ![]() | ||||||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.68 Å | ||||||||||||
![]() | Isupov, M.N. / Opatowsky, Y. | ||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Structure-function analysis of ceTIR-1/hSARM1 explains the lack of Wallerian axonal degeneration in C. elegans. 著者: Tami Khazma / Atira Grossman / Julia Guez-Haddad / Chengye Feng / Hadas Dabas / Radhika Sain / Michal Weitman / Ran Zalk / Michail N Isupov / Marc Hammarlund / Michael Hons / Yarden Opatowsky / ![]() ![]() ![]() ![]() 要旨: Wallerian axonal degeneration (WD) does not occur in the nematode C. elegans, in contrast to other model animals. However, WD depends on the NADase activity of SARM1, a protein that is also expressed ...Wallerian axonal degeneration (WD) does not occur in the nematode C. elegans, in contrast to other model animals. However, WD depends on the NADase activity of SARM1, a protein that is also expressed in C. elegans (ceSARM/ceTIR-1). We hypothesized that differences in SARM between species might exist and account for the divergence in WD. We first show that expression of the human (h)SARM1, but not ceTIR-1, in C. elegans neurons is sufficient to confer axon degeneration after nerve injury. Next, we determined the cryoelectron microscopy structure of ceTIR-1 and found that, unlike hSARM1, which exists as an auto-inhibited ring octamer, ceTIR-1 forms a readily active 9-mer. Enzymatically, the NADase activity of ceTIR-1 is substantially weaker (10-fold higher Km) than that of hSARM1, and even when fully active, it falls short of consuming all cellular NAD. Our experiments provide insight into the molecular mechanisms and evolution of SARM orthologs and WD across species. | ||||||||||||
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-関連構造データ
関連構造データ | ![]() 17369MC ![]() 8p2mC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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非結晶学的対称性 (NCS) | NCSドメイン:
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