ISDA

Entry Detail

PDB ID:

5IQU

Keywords:

OXIDOREDUCTASE

Title:

WelO5 G166D variant bound to Fe(II), 2-oxoglutarate, and 12-epifischerindole U

Biological Source:

Source Organism:

Hapalosiphon welwitschii UTEX B 1830

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2016-03-11

Release Date:

2016-06-29

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.51 Å

R-Value Free:

0.26

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

C 1 2 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:WelO5
Mutations:G166D
Chain IDs:A
Chain Length:315
Number of Molecules:1
Biological Source:Hapalosiphon welwitschii UTEX B 1830

UniProt ID:A0A067YX61 Pfam ID:PF22814 EC:1.14.20.14

Ligand Molecules

6CU

AKG

FE2

Primary Citation

Structural basis for halogenation by iron- and 2-oxo-glutarate-dependent enzyme WelO5.

Mitchell, A.J, Zhu, Q, Maggiolo, A.O, Ananth, N.R, Hillwig, M.L, Liu, X, Boal, A.K.Show

Nat.Chem.Biol. 12 636 640 (2016)

PMID: 27348090 DOI: 10.1038/nchembio.2112

Abstact

A 2.4-Å-resolution X-ray crystal structure of the carrier-protein-independent halogenase WelO5 in complex with its welwitindolinone precursor substrate, 12-epi-fischerindole U, reveals that the C13 chlorination target is proximal to the anticipated site of the oxo group in a presumptive cis-halo-oxo-iron(IV) (haloferryl) intermediate. Prior study of related halogenases forecasts substrate hydroxylation in this active-site configuration, but X-ray crystallographic verification of C13 halogenation in single crystals mandates that ligand dynamics must reposition the oxygen ligand to enable the observed outcome. S189A WelO5 produces a mixture of halogenation and hydroxylation products, showing that an outer-sphere hydrogen-bonding group orchestrates ligand movements to achieve a configuration that promotes halogen transfer.

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Primary Citation of related structures