8A7D

Partial dimer complex of PAPP-A and its inhibitor STC2

ELECTRON MICROSCOPY

Sample
Partial PAPP-A dimer in complex with subunit of its endogenous inhibitor STC2 dimer
Sample Components
PAPP-A
Subunit of Stanniocalcin-2
N-terminal part of PAPP-A
C-terminal part of PAPP-A

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	LEICA EM GP
Cryogen Name	ETHANE
Sample Vitrification Details	4 s

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	278982
Reported Resolution (Å)	3.06
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1	2
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details	alphafold2 model PAPP-A AF-Q13219-F1 STC2 AF-O76061-F1

Data Acquisition
Detector Type	GATAN K3 BIOQUANTUM (6k x 4k)	GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å**2)	59	58

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	600
Maximum Defocus (nm)	1800
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	3.3
MODEL FITTING	Coot
RECONSTRUCTION	cryoSPARC	3.3
MODEL REFINEMENT	PHENIX

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		6677370	Combined two datasets

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.