ISDA: 6L2F

Deposition Date 2019-10-03

Release Date 2020-04-01

Last Version Date 2024-10-30

Entry Detail

PDB ID:

6L2F

Keywords:

METAL BINDING PROTEIN

Title:

Crystal structure of a cupin protein (tm1459, H54AH58A mutant) in copper (Cu) substituted form

Biological Source:

Source Organism(s):

Thermotoga maritima MSB8 (Taxon ID: 243274)

Expression System(s):

Escherichia coli bl21(de3)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.23 Å

R-Value Free:

0.18

R-Value Work:

0.14

R-Value Observed:

0.14

Space Group:

P 21 21 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Cupin_2 domain-containing protein
Gene (Uniprot):Tmari_1465
Chain IDs:A, B
Chain Length:118
Number of Molecules:2
Biological Source:Thermotoga maritima MSB8

UniProt ID:Q9X1H0 Pfam ID:PF07883

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
CSD	A	CYS	modified residue

Ligand Molecules

MES

P33

Primary Citation

Cupin Variants as a Macromolecular Ligand Library for Stereoselective Michael Addition of Nitroalkanes.

Fujieda, N, Ichihashi, H, Yuasa, M, Nishikawa, Y, Kurisu, G, Itoh, S.Show

Angew.Chem.Int.Ed.Engl. 59 7717 7720 (2020)

PMID: 32073197 DOI: 10.1002/anie.202000129

Abstact

Cupin superfamily proteins (TM1459) work as a macromolecular ligand framework with a double-stranded β-barrel structure ligating to a Cu ion through histidine side chains. Variegating the first coordination sphere of TM1459 revealed that H52A and H54A/H58A mutants effectively catalyzed the diastereo- and enantioselective Michael addition reaction of nitroalkanes to an α,β-unsaturated ketone. Moreover, calculated substrate docking signified C106N and F104W single-point mutations, which inverted the diastereoselectivity of H52A and further improved the stereoselectivity of H54A/H58A, respectively.

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Primary Citation of related structures

Abstact

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