ISDA

Entry Detail

PDB ID:

2ZWN

Keywords:

OXIDOREDUCTASE

Title:

Crystal structure of the novel two-domain type laccase from a metagenome

Biological Source:

Source Organism:

metagenomes

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2008-12-17

Release Date:

2009-04-07

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.70 Å

R-Value Free:

0.18

R-Value Work:

0.15

R-Value Observed:

0.16

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:two-domain type laccase
Chain IDs:A, B, C
Chain Length:339
Number of Molecules:3
Biological Source:metagenomes

UniProt ID:C0STU6 Pfam ID:PF07732, PF07731

Ligand Molecules

C2O

Primary Citation

X-ray structure of a two-domain type laccase: a missing link in the evolution of multi-copper proteins

Komori, H, Miyazaki, K, Higuchi, Y.Show

Febs Lett. 583 1189 1195 (2009)

PMID: 19285076 DOI: 10.1016/j.febslet.2009.03.008

Abstact

A multi-copper protein with two cupredoxin-like domains was identified from our in-house metagenomic database. The recombinant protein, mgLAC, contained four copper ions/subunits, oxidized various phenolic and non-phenolic substrates, and had spectroscopic properties similar to common laccases. X-ray structure analysis revealed a homotrimeric architecture for this enzyme, which resembles nitrite reductase (NIR). However, a difference in copper coordination was found at the domain interface. mgLAC contains a T2/T3 tri-nuclear copper cluster at this site, whereas a mononuclear T2 copper occupies this position in NIR. The trimer is thus an essential part of the architecture of two-domain multi-copper proteins, and mgLAC may be an evolutionary precursor of NIR.

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Primary Citation of related structures