8P2L

A CHIMERA construct containing human SARM1 ARM and SAM domains and C. elegans TIR domain.

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other	7ANW
in silico model	AlphaFold

Refinement

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.385
r_dihedral_angle_4_deg	19.981
r_dihedral_angle_3_deg	13.132
r_dihedral_angle_1_deg	6.471
r_angle_refined_deg	1.649
r_nbtor_refined	0.293
r_nbd_refined	0.205
r_chiral_restr	0.128
r_xyhbond_nbd_refined	0.07
r_ncsr_local_group_30	0.018
r_ncsr_local_group_43	0.018
r_ncsr_local_group_49	0.018
r_ncsr_local_group_34	0.017
r_ncsr_local_group_36	0.017
r_ncsr_local_group_40	0.017
r_ncsr_local_group_42	0.017
r_ncsr_local_group_44	0.017
r_ncsr_local_group_46	0.017
r_ncsr_local_group_52	0.017
r_ncsr_local_group_54	0.017
r_ncsr_local_group_56	0.017
r_ncsr_local_group_3	0.013
r_ncsr_local_group_7	0.013
r_ncsr_local_group_14	0.013
r_ncsr_local_group_16	0.013
r_ncsr_local_group_18	0.013
r_ncsr_local_group_21	0.013
r_ncsr_local_group_25	0.013
r_ncsr_local_group_26	0.013
r_ncsr_local_group_28	0.013
r_ncsr_local_group_1	0.012
r_ncsr_local_group_5	0.012
r_ncsr_local_group_8	0.012
r_ncsr_local_group_10	0.012
r_ncsr_local_group_12	0.012
r_ncsr_local_group_19	0.012
r_ncsr_local_group_23	0.012
r_ncsr_local_group_22	0.009
r_gen_planes_refined	0.008
r_bond_refined_d	0.007
r_ncsr_local_group_20	0.006
r_ncsr_local_group_27	0.006
r_ncsr_local_group_9	0.005
r_ncsr_local_group_13	0.005
r_ncsr_local_group_45	0.005
r_ncsr_local_group_11	0.004
r_ncsr_local_group_17	0.004
r_ncsr_local_group_2	0.003
r_ncsr_local_group_6	0.003
r_ncsr_local_group_15	0.003
r_ncsr_local_group_24	0.003
r_ncsr_local_group_31	0.003
r_ncsr_local_group_32	0.003
r_ncsr_local_group_33	0.003
r_ncsr_local_group_35	0.003
r_ncsr_local_group_37	0.003
r_ncsr_local_group_38	0.003
r_ncsr_local_group_41	0.003
r_ncsr_local_group_48	0.003
r_ncsr_local_group_50	0.003
r_ncsr_local_group_51	0.003
r_ncsr_local_group_53	0.003
r_ncsr_local_group_29	0.002
r_ncsr_local_group_39	0.002
r_ncsr_local_group_55	0.002
r_ncsr_local_group_4	0.001
r_ncsr_local_group_47	0.001
r_mcbond_it
r_mcangle_it
r_scbond_it
r_scangle_it
r_lrange_it

Sample
A CHIMERA construct containing human SARM1 ARM and SAM domains and C. elegans TIR domain.

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	136346
Reported Resolution (Å)	2.68
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT

Map-Model Fitting and Refinement
Id	1
Refinement Space	RECIPROCAL
Refinement Protocol	FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	41.4

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	TFS KRIOS
Minimum Defocus (nm)	800
Maximum Defocus (nm)	2800
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
IMAGE ACQUISITION	EPU
MODEL FITTING	Coot	9.6
MODEL REFINEMENT	REFMAC	5
MODEL REFINEMENT	UCSF ChimeraX
MODEL REFINEMENT	ISOLDE
INITIAL EULER ASSIGNMENT	cryoSPARC
FINAL EULER ASSIGNMENT	cryoSPARC

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		298564