9WHA | pdb_00009wha

Crystal Structure of Bovine STING bound to 2'3'-cGAMP

PDB DOI: https://doi.org/10.2210/pdb9WHA/pdb

Classification: SIGNALING PROTEIN
Organism(s): Bos taurus
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2025-08-26 Released: 2026-03-04
Deposition Author(s): Zhao, Z.Z., Li, X.
Funding Organization(s): National Natural Science Foundation of China (NSFC)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.60 Å
R-Value Free:
0.241 (Depositor), 0.242 (DCC)
R-Value Work:
0.216 (Depositor), 0.216 (DCC)
R-Value Observed:
0.217 (Depositor)

Starting Model: experimental
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Ligand Structure Quality Assessment

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Literature

Species-Specific Regulation of STING by a C195 Disulfide Tetramer in Duck

Zhao, Z.Z., Li, X.

To be published.

Macromolecule Content

Total Structure Weight: 45.17 kDa
Atom Count: 3,346
Modeled Residue Count: 373
Deposited Residue Count: 390
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Stimulator of interferon genes protein	A, B	195	Bos taurus	Mutation(s): 0 Gene Names: STING1, STING, TMEM173
UniProt
Find proteins for Q2KI99 (Bos taurus) Explore Q2KI99 Go to UniProtKB: Q2KI99
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q2KI99
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
1SY (Subject of Investigation/LOI) Query on 1SY 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]	cGAMP C₂₀ H₂₄ N₁₀ O₁₃ P₂ XRILCFTWUCUKJR-INFSMZHSSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.60 Å
R-Value Free: 0.241 (Depositor), 0.242 (DCC)
R-Value Work: 0.216 (Depositor), 0.216 (DCC)
R-Value Observed: 0.217 (Depositor)

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.729	α = 90
b = 57.91	β = 90
c = 132.269	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data scaling
XDS	data reduction
PHENIX	phasing
PDB_EXTRACT	data extraction

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-03-04

Deposition Author(s):

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32373020

Revision History (Full details and data files)

Version 1.0: 2026-03-04
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.