8ZXO | pdb_00008zxo

Structure of the red fluorescent protein mScarlet-H at pH8.5

• PDB DOI: https://doi.org/10.2210/pdb8ZXO/pdb

• Classification: FLUORESCENT PROTEIN
• Organism(s): Discosoma sp.
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-06-14 Released: 2025-02-19 
• Deposition Author(s): Li, Y., Li, M., Fan, S., Zheng, Q., Li, S., Fu, Z.
• Funding Organization(s): National Natural Science Foundation of China (NSFC), Other government

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.82 Å
• R-Value Free: 
  0.226 (Depositor), 0.225 (DCC) 
• R-Value Work: 
  0.184 (Depositor), 0.184 (DCC) 
• R-Value Observed: 
  0.188 (Depositor) 

Starting Model: experimental

Literature

Structure of the red fluorescent protein mScarlet-H at pH8.5

Li, Y., Li, M., Fan, S., Zheng, Q., Li, S., Fu, Z.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 26.37 kDa 
• Atom Count: 1,931 
• Modeled Residue Count: 217 
• Deposited Residue Count: 230 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
red fluorescent protein mScarletH	A	230	Discosoma sp.	Mutation(s): 0
UniProt
Find proteins for Q9U6Y8 (Discosoma sp.) Explore Q9U6Y8  Go to UniProtKB:  Q9U6Y8

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
NRQ	A	L-PEPTIDE LINKING	C16 H17 N3 O4 S		MET, TYR, GLY

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.82 Å
• R-Value Free:  0.226 (Depositor), 0.225 (DCC) 
• R-Value Work:  0.184 (Depositor), 0.184 (DCC) 
• R-Value Observed: 0.188 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 84.715	α = 90
b = 45.351	β = 102.1
c = 58.658	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-02-19 
Deposition Author(s): Li, Y., Li, M., Fan, S., Zheng, Q., Li, S., Fu, Z.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32201235
Other government		2022J01287

Revision History  

• Version 1.0: 2025-02-19
  Type: Initial release