9K8Q | pdb_00009k8q

Structure of Promiscuous Short Chain reductase Spm14

• PDB DOI: https://doi.org/10.2210/pdb9K8Q/pdb

• Classification: BIOSYNTHETIC PROTEIN
• Organism(s): Spiromastix sp. SCSIO F190
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2024-10-24 Released: 2025-02-12 
• Deposition Author(s): Jing, L.Q., Peng, M., Chen, Y.Y., Ju, J.H., Wu, D.L.
• Funding Organization(s): Other government

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 
  0.272 (Depositor), 0.274 (DCC) 
• R-Value Work: 
  0.243 (Depositor), 0.247 (DCC) 
• R-Value Observed: 
  0.245 (Depositor) 

Starting Model: experimental

Literature

Enzymatic Insights into the Unusual Formation of Benzolactone and Benzopyran in the Biosynthesis of Spiromarmycin

Chen, Y., Jing, L., Peng, M., Cai, C., Shi, J., Ge, W., Liu, Y., Shang, Z., Ma, J., Wu, D., Ju, J.

(2025) ACS Catal 15: 2809-2821

• DOI: https://doi.org/10.1021/acscatal.4c07664

Biological Assembly 1  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 92.82 kDa 
• Atom Count: 5,310 
• Modeled Residue Count: 712 
• Deposited Residue Count: 879 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spm14	A, B, C	293	Spiromastix sp. SCSIO F190	Mutation(s): 0  EC: 1
UniProt
Find proteins for A0A8J9S3B0 (Diaporthe leptostromiformis) Explore A0A8J9S3B0  Go to UniProtKB:  A0A8J9S3B0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free:  0.272 (Depositor), 0.274 (DCC) 
• R-Value Work:  0.243 (Depositor), 0.247 (DCC) 
• R-Value Observed: 0.245 (Depositor) 

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 122.689	α = 90
b = 122.689	β = 90
c = 128.408	γ = 120

Software Package:

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

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2025-02-12 
Deposition Author(s): Jing, L.Q., Peng, M., Chen, Y.Y., Ju, J.H., Wu, D.L.

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Funding Organization	Location	Grant Number
Other government		--

Revision History  

• Version 1.0: 2025-02-12
  Type: Initial release
  
• Version 1.1: 2025-09-03
  Changes: Database references