9K32 | pdb_00009k32

Cryo-EM structure of the NbaCas9-guide RNA-target DNA complex

• PDB DOI: https://doi.org/10.2210/pdb9K32/pdb
• EM Map EMD-62004: EMDB EMDataResource

• Classification: RNA BINDING PROTEIN
• Organism(s): Nitrospirota bacterium, synthetic construct
• Expression System: Escherichia coli, Expression vector pET-mod
• Mutation(s): No 


• Deposited: 2024-10-18 Released: 2026-02-04 
• Deposition Author(s): Nagahata, N., Yamada, S., Yamashita, K., Nishimasu, H.
• Funding Organization(s): Japan Science and Technology, Japan Society for the Promotion of Science (JSPS)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.85 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of the NbCas9-guide RNA-target DNA complex

Nagahata, N.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 174.21 kDa 
• Atom Count: 10,323 
• Modeled Residue Count: 941 
• Deposited Residue Count: 1,017 
• Unique protein chains: 1
• Unique nucleic acid chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HNH nuclease domain-containing protein	A	736	Nitrospirota bacterium	Mutation(s): 0  Gene Names: DCP24_02765

Entity ID: 2
Molecule	Chains	Length	Organism	Image
Guide RNA	B	195	Nitrospirota bacterium

Entity ID: 3
Molecule	Chains	Length	Organism	Image
Target DNA strand	C	43	synthetic construct

Entity ID: 4
Molecule	Chains	Length	Organism	Image
Non-target DNA strand	D	43	synthetic construct

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	F [auth A], G [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG	E [auth A], H [auth B], I [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.85 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	Servalcat
RECONSTRUCTION	cryoSPARC

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2026-02-04 
Deposition Author(s): Nagahata, N., Yamada, S., Yamashita, K., Nishimasu, H.

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Funding Organization	Location	Grant Number
Japan Science and Technology	Japan	JPMJCR23B6
Japan Society for the Promotion of Science (JSPS)	Japan	JP21H05281
Japan Society for the Promotion of Science (JSPS)	Japan	JP22H00403

Revision History  

• Version 1.0: 2026-02-04
  Type: Initial release