9SMA | pdb_00009sma

Structure and mechanism of the broad spectrum CRISPR-associated ring nuclease Crn4

PDB DOI: https://doi.org/10.2210/pdb9SMA/pdb

Classification: ANTIVIRAL PROTEIN
Organism(s): Actinomyces procaprae
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2025-09-05 Released: 2025-12-03
Deposition Author(s): McMahon, S.A., Hoikkala, V., Gloster, T.M., White, M.F.
Funding Organization(s): European Research Council (ERC)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.34 Å
R-Value Free:
0.282 (Depositor), 0.285 (DCC)
R-Value Work:
0.222 (Depositor), 0.227 (DCC)

Starting Model: in silico
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wwPDB Validation 3D Report Full Report

This is version 1.0 of the entry. See complete history.

Literature

Structure and mechanism of the broad spectrum CRISPR-associated ring nuclease Crn4

Chi, H., Hoikkala, V., Graham, S., McMahon, S.A., Gloster, T.M., White, M.F.

To be published.

Macromolecule Content

Total Structure Weight: 33.55 kDa
Atom Count: 1,990
Modeled Residue Count: 252
Deposited Residue Count: 312
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Crn4a	A, B	156	Actinomyces procaprae	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.34 Å
R-Value Free: 0.282 (Depositor), 0.285 (DCC)
R-Value Work: 0.222 (Depositor), 0.227 (DCC)

Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 116.314	α = 90
b = 116.314	β = 90
c = 38.863	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
DIALS	data reduction
DIALS	data scaling
PHASER	phasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Released Date: 2025-12-03

Deposition Author(s):

Funding Organization	Location	Grant Number
European Research Council (ERC)	European Union	101018608

Revision History (Full details and data files)

Version 1.0: 2025-12-03
Type: Initial release

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 R01GM157729.