8IYY

Single excitation and two emissions pH sensor protein(SITE-pHorin)_pH7.0

• PDB DOI: https://doi.org/10.2210/pdb8IYY/pdb

• Classification: FLUORESCENT PROTEIN
• Organism(s): Aequorea victoria
• Expression System: Escherichia coli B
• Mutation(s): Yes 


• Deposited: 2023-04-06 Released: 2024-10-09 
• Deposition Author(s): Li, S.A., Kang, J.S.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.227 
• R-Value Work: 0.177 

Starting Model: experimental

Literature

A unified intracellular pH spectrum with sitepHorin-a quantum-entanglement-based pH-sensitive and ratiometric fluorescent protein

Li, S.A., Kang, J.S.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 27.68 kDa 
• Atom Count: 2,055 
• Modelled Residue Count: 237 
• Deposited Residue Count: 243 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Green fluorescent protein	A	243	Aequorea victoria	Mutation(s): 12  Gene Names: GFP
UniProt
Find proteins for P42212 (Aequorea victoria) Explore P42212  Go to UniProtKB:  P42212

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CRO	A	L-PEPTIDE LINKING	C15 H17 N3 O5		THR, TYR, GLY

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.227 
• R-Value Work: 0.177 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.071	α = 90
b = 62.092	β = 90
c = 70.658	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-3000	data collection
HKL-3000	data reduction
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-10-09 
Deposition Author(s): Li, S.A., Kang, J.S.

---

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

Revision History  

• Version 1.0: 2024-10-09
  Type: Initial release