ISDA

Entry Detail

PDB ID:

9EX1

Keywords:

Title:

X-ray structure of a polyoxidovanadate/lysozyme adduct obtained when the protein is treated with [VIVO(acac)2] in 1.1 M NaCl, 0.1 M sodium acetate at pH 4.0 (Structure B)

Biological Source:

Source Organism:

Gallus gallus

PDB Version:

Deposition Date:

2024-04-05

Release Date:

2024-06-26

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.79 Å

R-Value Free:

0.30

R-Value Work:

0.24

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Lysozyme C
Chain IDs:A
Chain Length:129
Number of Molecules:1
Biological Source:Gallus gallus

UniProt ID:P00698 Pfam ID:PF00062 EC:3.2.1.17

Ligand Molecules

A1H8D

Primary Citation

Non-Covalent and Covalent Binding of New Mixed-Valence Cage-like Polyoxidovanadate Clusters to Lysozyme.

Tito, G, Ferraro, G, Pisanu, F, Garribba, E, Merlino, A.Show

Angew.Chem.Int.Ed.Engl. 63 e202406669 e202406669 (2024)

PMID: 38842919 DOI: 10.1002/anie.202406669

Abstact

The high-resolution X-ray structures of the model protein lysozyme in the presence of the potential drug [VIVO(acetylacetonato)2] from crystals grown in 1.1 M NaCl, 0.1 M sodium acetate at pH 4.0 reveal the binding to the protein of different and unexpected mixed-valence cage-like polyoxidovanadates (POVs): [V15O36(OH2)]5-, which non-covalently interacts with the lysozyme surface, [V15O33(OH2)]+ and [V20O51(OH2)]n- (this latter based on an unusual {V18O43} cage) which covalently bind the protein. EPR spectroscopy confirms the partial oxidation of VIV to VV and the formation of mixed-valence species. The results indicate that the interaction with proteins can stabilize the structure of unexpected - both for dimension and architecture - POVs, not observed in aqueous solution.

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