4PNE image
Entry Detail
PDB ID:
4PNE
Keywords:
BIOSYNTHETIC PROTEIN
Title:
Crystal Structure of the [4+2]-Cyclase SpnF
Biological Source:
Source Organism:
Saccharopolyspora spinosa
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2014-05-23
Release Date:
2015-02-18
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.50 Å
R-Value Free:
0.22
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 1 21 1
4PNE validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Methyltransferase-like protein
Chain IDs:A, B
Chain Length:302
Number of Molecules:2
Biological Source:Saccharopolyspora spinosa
UniProt ID:Q9ALM7 Pfam ID:PF08241
Ligand Molecules
MLI
SAH
Primary Citation
The structure of SpnF, a standalone enzyme that catalyzes [4 + 2] cycloaddition.
Nat.Chem.Biol. 11 256 258 (2015)
PMID: 25730549 DOI: 10.1038/nchembio.1768

Abstact

In the biosynthetic pathway of the spinosyn insecticides, the tailoring enzyme SpnF performs a [4 + 2] cycloaddition on a 22-membered macrolactone to forge an embedded cyclohexene ring. To learn more about this reaction, which could potentially proceed through a Diels-Alder mechanism, we determined the 1.50-Å-resolution crystal structure of SpnF bound to S-adenosylhomocysteine. This sets the stage for advanced experimental and computational studies to determine the precise mechanism of SpnF-mediated cyclization.

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Disease

Primary Citation of related structures
4PNE