8R1Q | pdb_00008r1q

SARS-CoV-2 Mpro (Omicron, P132H+T169S) in complex with alpha-ketoamide 13b-K

PDB DOI: https://doi.org/10.2210/pdb8R1Q/pdb

Classification: VIRAL PROTEIN
Organism(s): Severe acute respiratory syndrome coronavirus 2
Expression System: Escherichia coli
Mutation(s): Yes

Deposited: 2023-11-02 Released: 2024-11-13
Deposition Author(s): Sun, X., Ibrahim, M., Hilgenfeld, R.
Funding Organization(s): Other government

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.70 ?
R-Value Free:
0.223 (Depositor), 0.221 (DCC)
R-Value Work:
0.194 (Depositor), 0.193 (DCC)
R-Value Observed:
0.196 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.1 of the entry. See complete history.

Literature

Why is the Omicron main protease of SARS-CoV-2 less stable than its wild-type counterpart? A crystallographic, biophysical, and theoretical study

Ibrahim, M., Sun, X., Martins de Oliveira, V., Liu, R., Clayton, J., El Kilani, H., Shen, J., Hilgenfeld, R.

(2024) Hlife 2: 419-433

DOI: https://doi.org/10.1016/j.hlife.2024.06.003

Macromolecule Content

Total Structure Weight: 68.9 kDa
Atom Count: 5,299
Modelled Residue Count: 612
Deposited Residue Count: 612
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3C-like proteinase nsp5	A [auth B], B [auth A]	306	Severe acute respiratory syndrome coronavirus 2	Mutation(s): 2 EC: 3.4.22.69
UniProt
Find proteins for P0DTC1 (Severe acute respiratory syndrome coronavirus 2) Explore P0DTC1 Go to UniProtKB: P0DTC1
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P0DTC1
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
O6K (Subject of Investigation/LOI) Query on O6K Download Ideal Coordinates CCD File SDF format, chain C [auth B] SDF format, chain D [auth A] MOL2 format, chain C [auth B] MOL2 format, chain D [auth A] mmCIF format, chain C [auth B] mmCIF format, chain D [auth A]	C [auth B], D [auth A]	~{tert}-butyl ~{N}-[1-[(2~{S})-3-cyclopropyl-1-oxidanylidene-1-[[(2~{S},3~{R})-3-oxidanyl-4-oxidanylidene-1-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]-4-[(phenylmethyl)amino]butan-2-yl]amino]propan-2-yl]-2-oxidanylidene-pyridin-3-yl]carbamate C₃₁ H₄₁ N₅ O₇ FRACPXUHUTXLCX-BELIEFIBSA-N		Interactions Focus chain C [auth B] Focus chain D [auth A] Interactions & Density Focus chain C [auth B] Focus chain D [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.70 ?
R-Value Free: 0.223 (Depositor), 0.221 (DCC)
R-Value Work: 0.194 (Depositor), 0.193 (DCC)
R-Value Observed: 0.196 (Depositor)

Space Group: P 1 2₁ 1

Unit Cell:

Length ( ? )	Angle ( ? )
a = 45.541	α = 90
b = 64.032	β = 90.96
c = 103.692	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
REFMAC	refinement
XDS	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

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Ligand Structure Quality Assessment

Entry History & Funding Information

Deposition Data

Released Date: 2024-11-13

Deposition Author(s):

Funding Organization	Location	Grant Number
Other government	Germany	--

Revision History (Full details and data files)

Version 1.0: 2024-11-13
Type: Initial release
Version 1.1: 2025-04-09
Changes: Database references

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.