9UD1 | pdb_00009ud1

Cryo-EM structure of STITCHR (R2Tg and Cas9 nickase) bound to guide RNA, template RNA, and target DNA in the target-primed reverse transcription initiation state

ELECTRON MICROSCOPY

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Refinement

RMS Deviations
Key	Refinement Restraint Deviation
s_dihedral_angle_6_deg	15.2948
s_dihedral_angle_3_deg	13.0699
s_dihedral_angle_1_deg	5.8943
s_dihedral_angle_2_deg	3.6037
s_angle_nonh_deg	1.3919
s_nbtor	0.2119
s_nbd	0.1958
s_hbond_nbd	0.1491
s_chiral_restr	0.1413
s_bond_nonh_d	0.0049
s_planes	0.0044

Sample
Cas9-R2Tg-guide RNA-R2 RNA-DNA complex

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

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	35803
Reported Resolution (Å)	3.3
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

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

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	50

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	TFS KRIOS
Minimum Defocus (nm)	800
Maximum Defocus (nm)	2000
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
CTF CORRECTION	cryoSPARC
INITIAL EULER ASSIGNMENT	cryoSPARC
FINAL EULER ASSIGNMENT	cryoSPARC
CLASSIFICATION	RELION
RECONSTRUCTION	cryoSPARC
MODEL REFINEMENT	Servalcat

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