9VVF | pdb_00009vvf

Crystal structure of HKU5-CoV-1 main protease(Mpro) in complex with Ensitrelvir

PDB DOI: https://doi.org/10.2210/pdb9VVF/pdb

Classification: VIRAL PROTEIN
Organism(s): Pipistrellus bat coronavirus HKU5
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2025-07-15 Released: 2026-07-15
Deposition Author(s): Kim, H., Lee, J., Jung, S., Kim, J., Jo, I.
Funding Organization(s): Not funded

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.55 Å
R-Value Free:
0.204 (Depositor), 0.204 (DCC)
R-Value Work:
0.181 (Depositor), 0.181 (DCC)
R-Value Observed:
0.182 (Depositor)

Starting Model: in silico
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Ligand Structure Quality Assessment

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Literature

Crystal structure of HKU5-CoV-1 main protease(Mpro) in complex with Ensitrelvir

Kim, H., Lee, J., Jung, S., Kim, J., Jo, I.

To be published.

Macromolecule Content

Total Structure Weight: 34.13 kDa
Atom Count: 2,611
Modeled Residue Count: 304
Deposited Residue Count: 306
Unique protein chains: 1

Macromolecules

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Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3C-like proteinase nsp5	A	306	Pipistrellus bat coronavirus HKU5	Mutation(s): 0 Gene Names: rep, 1a-1b EC: 3.4.22
UniProt
Find proteins for P0C6W4 (Bat coronavirus HKU5) Explore P0C6W4 Go to UniProtKB: P0C6W4
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P0C6W4
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
7YY (Subject of Investigation/LOI) Query on 7YY Download:Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A] mmCIF format, chain B [auth A]	B [auth A]	6-[(6-chloranyl-2-methyl-indazol-5-yl)amino]-3-[(1-methyl-1,2,4-triazol-3-yl)methyl]-1-[[2,4,5-tris(fluoranyl)phenyl]methyl]-1,3,5-triazine-2,4-dione C₂₂ H₁₇ Cl F₃ N₉ O₂ QMPBBNUOBOFBFS-UHFFFAOYSA-N		Interactions Focus chain B [auth A] Interactions & Density Focus chain B [auth A]
GOL Query on GOL Download:Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A] mmCIF format, chain C [auth A]	C [auth A]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]
MG Query on MG Download:Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A] mmCIF format, chain D [auth A]	D [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.55 Å
R-Value Free: 0.204 (Depositor), 0.204 (DCC)
R-Value Work: 0.181 (Depositor), 0.181 (DCC)
R-Value Observed: 0.182 (Depositor)

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 102.585	α = 90
b = 57.875	β = 112.34
c = 49.631	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data scaling
HKL-2000	data reduction
PHASER	phasing
PDB_EXTRACT	data extraction

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-07-15

Deposition Author(s):

Funding Organization	Location	Grant Number
Not funded		--

Revision History (Full details and data files)

Version 1.0: 2026-07-15
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.