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- EMDB-24272: Cryo-EM structure of activated human SARM1 in complex with NMN an... -

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Basic information

Entry
Database: EMDB / ID: EMD-24272
TitleCryo-EM structure of activated human SARM1 in complex with NMN and 1AD (TIR:1AD)
Map dataSharpened map
Sample
  • Complex: human SARM1 in complex with NMN and 1AD
    • Protein or peptide: NAD(+) hydrolase SARM1
  • Ligand: [[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(2~{R},3~{S},4~{R},5~{R})-5-(5-iodanylisoquinolin-2-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl hydrogen phosphate
KeywordsNADase / axon degeneration / inhibitor / HYDROLASE / HYDROLASE-Inhibitor complex
Function / homology
Function and homology information


negative regulation of MyD88-independent toll-like receptor signaling pathway / MyD88-independent TLR4 cascade / Toll Like Receptor 3 (TLR3) Cascade / NADP+ nucleosidase activity / NAD catabolic process / ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase / NAD+ nucleosidase activity / protein localization to mitochondrion / NAD+ nucleotidase, cyclic ADP-ribose generating / nervous system process ...negative regulation of MyD88-independent toll-like receptor signaling pathway / MyD88-independent TLR4 cascade / Toll Like Receptor 3 (TLR3) Cascade / NADP+ nucleosidase activity / NAD catabolic process / ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase / NAD+ nucleosidase activity / protein localization to mitochondrion / NAD+ nucleotidase, cyclic ADP-ribose generating / nervous system process / Hydrolases; Glycosylases; Hydrolysing N-glycosyl compounds / regulation of dendrite morphogenesis / response to axon injury / response to glucose / regulation of neuron apoptotic process / signaling adaptor activity / TRAF6-mediated induction of TAK1 complex within TLR4 complex / Activation of IRF3, IRF7 mediated by TBK1, IKKε (IKBKE) / IKK complex recruitment mediated by RIP1 / nervous system development / mitochondrial outer membrane / microtubule / cell differentiation / axon / innate immune response / dendrite / synapse / cell surface / signal transduction / protein-containing complex / mitochondrion / identical protein binding / cytosol / cytoplasm
Similarity search - Function
Sterile alpha and TIR motif-containing protein 1 / TIR domain / Toll - interleukin 1 - resistance / TIR domain profile. / Toll/interleukin-1 receptor homology (TIR) domain / Toll/interleukin-1 receptor homology (TIR) domain superfamily / SAM domain (Sterile alpha motif) / SAM domain profile. / Sterile alpha motif. / Sterile alpha motif domain ...Sterile alpha and TIR motif-containing protein 1 / TIR domain / Toll - interleukin 1 - resistance / TIR domain profile. / Toll/interleukin-1 receptor homology (TIR) domain / Toll/interleukin-1 receptor homology (TIR) domain superfamily / SAM domain (Sterile alpha motif) / SAM domain profile. / Sterile alpha motif. / Sterile alpha motif domain / Sterile alpha motif/pointed domain superfamily / Armadillo-like helical / Armadillo-type fold
Similarity search - Domain/homology
NAD(+) hydrolase SARM1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsKerry PS / Nanson JD
Funding support Australia, 2 items
OrganizationGrant numberCountry
National Health and Medical Research Council (NHMRC, Australia) Australia
Australian Research Council (ARC) Australia
CitationJournal: Mol Cell / Year: 2022
Title: Structural basis of SARM1 activation, substrate recognition, and inhibition by small molecules.
Authors: Yun Shi / Philip S Kerry / Jeffrey D Nanson / Todd Bosanac / Yo Sasaki / Raul Krauss / Forhad K Saikot / Sarah E Adams / Tamim Mosaiab / Veronika Masic / Xianrong Mao / Faith Rose / Eduardo ...Authors: Yun Shi / Philip S Kerry / Jeffrey D Nanson / Todd Bosanac / Yo Sasaki / Raul Krauss / Forhad K Saikot / Sarah E Adams / Tamim Mosaiab / Veronika Masic / Xianrong Mao / Faith Rose / Eduardo Vasquez / Marieke Furrer / Katie Cunnea / Andrew Brearley / Weixi Gu / Zhenyao Luo / Lou Brillault / Michael J Landsberg / Aaron DiAntonio / Bostjan Kobe / Jeffrey Milbrandt / Robert O Hughes / Thomas Ve /
Abstract: The NADase SARM1 (sterile alpha and TIR motif containing 1) is a key executioner of axon degeneration and a therapeutic target for several neurodegenerative conditions. We show that a potent SARM1 ...The NADase SARM1 (sterile alpha and TIR motif containing 1) is a key executioner of axon degeneration and a therapeutic target for several neurodegenerative conditions. We show that a potent SARM1 inhibitor undergoes base exchange with the nicotinamide moiety of nicotinamide adenine dinucleotide (NAD) to produce the bona fide inhibitor 1AD. We report structures of SARM1 in complex with 1AD, NAD mimetics and the allosteric activator nicotinamide mononucleotide (NMN). NMN binding triggers reorientation of the armadillo repeat (ARM) domains, which disrupts ARM:TIR interactions and leads to formation of a two-stranded TIR domain assembly. The active site spans two molecules in these assemblies, explaining the requirement of TIR domain self-association for NADase activity and axon degeneration. Our results reveal the mechanisms of SARM1 activation and substrate binding, providing rational avenues for the design of new therapeutics targeting SARM1.
History
DepositionJun 21, 2021-
Header (metadata) releaseMar 23, 2022-
Map releaseMar 23, 2022-
UpdateJun 5, 2024-
Current statusJun 5, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_24272.png

Downloads & links

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Map

FileDownload / File: emd_24272.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.09 Å/pix.
x 300 pix.
= 325.8 Å		1.09 Å/pix.
x 300 pix.
= 325.8 Å		1.09 Å/pix.
x 300 pix.
= 325.8 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.086 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.7
Minimum - Maximum-3.9024231 - 5.579544
Average (Standard dev.)0.0020960076 (±0.07527489)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 325.8 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_24272_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map A

Fileemd_24272_half_map_1.map
AnnotationHalf map A
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map B

Fileemd_24272_half_map_2.map
AnnotationHalf map B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : human SARM1 in complex with NMN and 1AD

EntireName: human SARM1 in complex with NMN and 1AD
Components
  • Complex: human SARM1 in complex with NMN and 1AD
    • Protein or peptide: NAD(+) hydrolase SARM1
  • Ligand: [[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(2~{R},3~{S},4~{R},5~{R})-5-(5-iodanylisoquinolin-2-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl hydrogen phosphate

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Supramolecule #1: human SARM1 in complex with NMN and 1AD

SupramoleculeName: human SARM1 in complex with NMN and 1AD / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: NAD(+) hydrolase SARM1

MacromoleculeName: NAD(+) hydrolase SARM1 / type: protein_or_peptide / ID: 1 / Number of copies: 8 / Enantiomer: LEVO / EC number: ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 76.471469 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: LAVPGPDGGG GTGPWWAAGG RGPREVSPGA GTEVQDALER ALPELQQALS ALKQAGGARA VGAGLAEVFQ LVEEAWLLPA VGREVAQGL CDAIRLDGGL DLLLRLLQAP ELETRVQAAR LLEQILVAEN RDRVARIGLG VILNLAKERE PVELARSVAG I LEHMFKHS ...String:
LAVPGPDGGG GTGPWWAAGG RGPREVSPGA GTEVQDALER ALPELQQALS ALKQAGGARA VGAGLAEVFQ LVEEAWLLPA VGREVAQGL CDAIRLDGGL DLLLRLLQAP ELETRVQAAR LLEQILVAEN RDRVARIGLG VILNLAKERE PVELARSVAG I LEHMFKHS EETCQRLVAA GGLDAVLYWC RRTDPALLRH CALALGNCAL HGGQAVQRRM VEKRAAEWLF PLAFSKEDEL LR LHACLAV AVLATNKEVE REVERSGTLA LVEPLVASLD PGRFARCLVD ASDTSQGRGP DDLQRLVPLL DSNRLEAQCI GAF YLCAEA AIKSLQGKTK VFSDIGAIQS LKRLVSYSTN GTKSALAKRA LRLLGEEVPR PILPSVPSWK EAEVQTWLQQ IGFS KYCES FREQQVDGDL LLRLTEEELQ TDLGMKSGIT RKRFFRELTE LKTFANYSTC DRSNLADWLG SLDPRFRQYT YGLVS CGLD RSLLHRVSEQ QLLEDCGIHL GVHRARILTA AREMLHSPLP CTGGKPSGDT PDVFISYRRN SGSQLASLLK VHLQLH GFS VFIDVEKLEA GKFEDKLIQS VMGARNFVLV LSPGALDKCM QDHDCKDWVH KEIVTALSCG KNIVPIIDGF EWPEPQV LP EDMQAVLTFN GIKWSHEYQE ATIEKIIRFL QGRSSRDSSA GSDTSLEGAA PMGPT

UniProtKB: NAD(+) hydrolase SARM1

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Macromolecule #2: [[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidany...

MacromoleculeName: [[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(2~{R},3~{S},4~{R},5~{R})-5-(5-iodanylisoquinolin-2-yl)-3,4-bis(oxidanyl)oxolan-2-yl] ...Name: [[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(2~{R},3~{S},4~{R},5~{R})-5-(5-iodanylisoquinolin-2-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl hydrogen phosphate
type: ligand / ID: 2 / Number of copies: 8 / Formula: 1QD
Molecular weightTheoretical: 797.364 Da
Chemical component information

ChemComp-1QD:
[[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(2~{R},3~{S},4~{R},5~{R})-5-(5-iodanylisoquinolin-2-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl hydrogen phosphate

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.6 mg/mL
BufferpH: 7.5
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 40.9 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: OTHER / Imaging mode: OTHER / Cs: 2.7 mm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1826067
Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 3.1) / Number images used: 1066814
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 3.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 3.1)
FSC plot (resolution estimation)

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