9IQM | pdb_00009iqm

CatM-L6S, a SnoaL-like protein in complex with substrate mimic L6S

• PDB DOI: https://doi.org/10.2210/pdb9IQM/pdb

• Classification: BIOSYNTHETIC PROTEIN
• Organism(s): Streptantibioticus cattleyicolor NRRL 8057 = DSM 46488
• Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
• Mutation(s): No 


• Deposited: 2024-07-12 Released: 2025-07-16 
• Deposition Author(s): Zhang, B., Ge, H.M.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 
  0.229 (Depositor) 
• R-Value Work: 
  0.208 (Depositor) 
• R-Value Observed: 
  0.209 (Depositor) 

Starting Model: experimental

Literature

Tandem Michael addition and Knoevenagel condensation catalyzed by NTF2-Like Enzymes as iminium catalysis

Liu, C.L., Zhang, B., Ge, H.M.

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 and generated by PISA (software)

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 15.04 kDa 
• Atom Count: 1,020 
• Modeled Residue Count: 121 
• Deposited Residue Count: 132 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SnoaL-like domain-containing protein	A	132	Streptantibioticus cattleyicolor NRRL 8057 = DSM 46488	Mutation(s): 0  Gene Names: SCATT_01420
UniProt
Find proteins for G8X1I4 (Streptantibioticus cattleyicolor (strain ATCC 35852 / DSM 46488 / JCM 4925 / NBRC 14057 / NRRL 8057)) Explore G8X1I4  Go to UniProtKB:  G8X1I4

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
A1D90 (Subject of Investigation/LOI)	B [auth A]	(5~{R},6~{R})-6-[(~{E})-5-[(2~{S},3~{S},5~{S})-5-(2-hydroxyethyl)-3,5-dimethyl-oxolan-2-yl]-3-methyl-2-oxidanylidene-pent-3-enyl]-5-propyl-oxane-2,4-dione C22 H34 O6 MVJVJKSGEMISOL-KHRHQXNTSA-N
SO4	C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free:  0.229 (Depositor) 
• R-Value Work:  0.208 (Depositor) 
• R-Value Observed: 0.209 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.617	α = 90
b = 99.719	β = 90
c = 58.859	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
xia2	data reduction
xia2	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-16 
Deposition Author(s): Zhang, B., Ge, H.M.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	22277051,81925033, 22193071

Revision History  

• Version 1.0: 2025-07-16
  Type: Initial release
  
• Version 1.1: 2025-10-15
  Changes: Structure summary