9WJ1 | pdb_00009wj1

The crystal structure of PRRSV protease nsp4

PDB DOI: https://doi.org/10.2210/pdb9WJ1/pdb

Classification: VIRAL PROTEIN
Organism(s): Porcine reproductive and respiratory syndrome virus
Expression System: Escherichia coli BL21
Mutation(s): No

Deposited: 2025-08-30 Released: 2026-09-02
Deposition Author(s): Weng, J., Wei, Z.
Funding Organization(s): Other government

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.38 Å
R-Value Free:
0.267 (Depositor), 0.267 (DCC)
R-Value Work:
0.197 (Depositor), 0.197 (DCC)
R-Value Observed:
0.204 (Depositor)

Starting Model: experimental
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This is version 1.0 of the entry. See complete history.

Literature

PRRSV nsp4 with Cys111 and Cys115 in reduced form.

Weng, J., Wei, Z.

To be published.

Macromolecule Content

Total Structure Weight: 22.96 kDa
Atom Count: 1,421
Modeled Residue Count: 192
Deposited Residue Count: 220
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine protease nsp4	A	220	Porcine reproductive and respiratory syndrome virus	Mutation(s): 0 EC: 3.4.21
UniProt
Find proteins for A6YQT5 (Porcine reproductive and respiratory syndrome virus) Explore A6YQT5 Go to UniProtKB: A6YQT5
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A6YQT5
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.38 Å
R-Value Free: 0.267 (Depositor), 0.267 (DCC)
R-Value Work: 0.197 (Depositor), 0.197 (DCC)
R-Value Observed: 0.204 (Depositor)

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 110.283	α = 90
b = 48.365	β = 111.46
c = 42.873	γ = 90

Software Package:

Software Name	Purpose
MxCuBE	data collection
autoPX	data processing
xia2	data scaling
PHENIX	refinement

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-09-02

Deposition Author(s):

Funding Organization	Location	Grant Number
Other government	China	2025020602030105
Other government	China	SKLBEE2022007

Revision History (Full details and data files)

Version 1.0: 2026-09-02
Type: Initial release

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.