5VG0 image
Entry Detail
PDB ID:
5VG0
Title:
Room temperature X-ray crystallographic structure of a Jonesia denitrificans lytic polysaccharide monooxygenase at 1.1 angstrom resolution.
Biological Source:
PDB Version:
Deposition Date:
2017-04-10
Release Date:
2017-05-24
Method Details:
Experimental Method:
Resolution:
1.10 Å
R-Value Free:
0.12
R-Value Work:
0.11
R-Value Observed:
0.11
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Chitinase
Chain IDs:A, B
Chain Length:142
Number of Molecules:2
Biological Source:Jonesia denitrificans (strain ATCC 14870 / DSM 20603 / CIP 55134)
Primary Citation
Neutron and Atomic Resolution X-ray Structures of a Lytic Polysaccharide Monooxygenase Reveal Copper-Mediated Dioxygen Binding and Evidence for N-Terminal Deprotonation.
Biochemistry 56 2529 2532 (2017)
PMID: 28481095 DOI: 10.1021/acs.biochem.7b00019

Abstact

A 1.1 Å resolution, room-temperature X-ray structure and a 2.1 Å resolution neutron structure of a chitin-degrading lytic polysaccharide monooxygenase domain from the bacterium Jonesia denitrificans (JdLPMO10A) show a putative dioxygen species equatorially bound to the active site copper. Both structures show an elongated density for the dioxygen, most consistent with a Cu(II)-bound peroxide. The coordination environment is consistent with Cu(II). In the neutron and X-ray structures, difference maps reveal the N-terminal amino group, involved in copper coordination, is present as a mixed ND2 and ND-, suggesting a role for the copper ion in shifting the pKa of the amino terminus.

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