4ZFP image
Deposition Date 2015-04-21
Release Date 2015-06-24
Last Version Date 2024-11-20
Entry Detail
PDB ID:
4ZFP
Keywords:
HYDROLASE
Title:
A new crystal structure for the adduct formed in the reaction between AuSac2, a cytotoxic homoleptic gold(I) compound with the saccharinate ligand, and the model protein hen egg white lysozyme
Biological Source:
Source Organism:
Gallus gallus (Taxon ID: 9031)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.96 Å
R-Value Free:
0.23
R-Value Work:
0.16
R-Value Observed:
0.17
Space Group:
P 43 21 2
4ZFP validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Lysozyme C
Gene (Uniprot):LYZ
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
AU
EDO
NO3
Primary Citation
Structural evidences for a secondary gold binding site in the hydrophobic box of lysozyme.
Biometals 28 745 754 (2015)
PMID: 26054833 DOI: 10.1007/s10534-015-9863-7

Abstact

A new crystal structure is reported here for the adduct formed in the reaction between NH4 [Au(Sac)2], AuSac2, a cytotoxic homoleptic gold(I) complex with the saccharinate ligand, and the model protein hen egg white lysozyme. To produce this adduct, AuSac2 breaks down and releases both saccharinate ligands. The resulting Au(I) ions bind the protein to ND1 and NE2 atoms of His15 but also to SD atom of the zero-solvent accessible Met105 side chain, which is located in the protein hydrophobic box. The unexpected existence of this secondary gold(I) binding site is confirmed by spectroscopic and spectrometric measurements in solution.

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Primary Citation of related structures
4ZFP