9JNQ | pdb_00009jnq

dehydrogenase McyI

• PDB DOI: https://doi.org/10.2210/pdb9JNQ/pdb

• Classification: TOXIN
• Organism(s): Microcystis aeruginosa PCC 7806
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-09-23 Released: 2025-10-01 
• Deposition Author(s): Xue, C., Wang, Q.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 
  0.234 (Depositor), 0.234 (DCC) 
• R-Value Work: 
  0.199 (Depositor), 0.199 (DCC) 
• R-Value Observed: 
  0.201 (Depositor) 

Starting Model: experimental

Literature

McyI: A Moonlighting Protein Central to Microcystin-LR Biosynthesis and the Fine-Tuned Self-Detoxification Mechanism

Xue, C., Wang, Q.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 73.71 kDa 
• Atom Count: 5,852 
• Modeled Residue Count: 658 
• Deposited Residue Count: 660 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
McyI	A, B	330	Microcystis aeruginosa PCC 7806	Mutation(s): 0  Gene Names: mcyI
UniProt
Find proteins for J9WTS5 (Microcystis aeruginosa FCY-28) Explore J9WTS5  Go to UniProtKB:  J9WTS5

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAD (Subject of Investigation/LOI)	C [auth A], D [auth B]	NICOTINAMIDE-ADENINE-DINUCLEOTIDE C21 H27 N7 O14 P2 BAWFJGJZGIEFAR-NNYOXOHSSA-N
PO4 (Subject of Investigation/LOI)	E [auth B]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free:  0.234 (Depositor), 0.234 (DCC) 
• R-Value Work:  0.199 (Depositor), 0.199 (DCC) 
• R-Value Observed: 0.201 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 52.11	α = 90
b = 100.983	β = 90
c = 131.135	γ = 90

Software Package:

Software Name	Purpose
HKL-3000	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
HKL-3000	data reduction
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-10-01 
Deposition Author(s): Xue, C., Wang, Q.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32170138

Revision History  

• Version 1.0: 2025-10-01
  Type: Initial release