9GCB

DUF4198 protein from Ideonella sakaiensis with Ni bound

9GCB の概要

• エントリーDOI: 10.2210/pdb9gcb/pdb
• 分子名称: Nickel ECF transporter, additional periplasmic component NikK, NICKEL (II) ION, MALONATE ION, ... (4 entities in total)
• 機能のキーワード: metalloprotein, oxygenase, peroxygenase, metal binding protein
• 由来する生物種: Piscinibacter sakaiensis
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 44947.75

構造登録者

Franco Cairo, J.P.L.,Correa, T.L.R.,Offen, W.A.,Nairn, A.,Walton, J.,Davies, G.J.,Walton, P.H.,Sweeney, S.T. (登録日: 2024-08-01, 公開日: 2025-09-10, 最終更新日: 2025-10-29)

主引用文献

Franco Cairo, J.P.L.,Correa, T.L.R.,Offen, W.A.,Nairn, A.K.,Walton, J.,Sweeney, S.T.,Davies, G.J.,Walton, P.H.
Signal-strapping as a protein-sequence search method for the discovery of metalloproteins.
Nat Commun, 16:9244-9244, 2025

PubMed Abstract: Metalloprotein discovery is often made post hoc, in which activity studies following protein isolation reveal a metal-ion dependence. Herein we take a different approach to finding metalloproteins, by building on the discovery of copper-containing lytic polysaccharide monooxygenases (LPMOs), which include an N-terminal histidine as part of their sequence. This residue acts as a natural chelator for transition metal ions, irrespective of the structure of the protein. We report the method of signal strapping, where sequences of N-terminal signal peptides artificially appended with a histidine residue at their C-terminus are used to bootstrap a proteomic search. These searches return sequences of proteins with an N-terminal histidine capable of coordinating a metal ion. We exemplify the approach by the discovery and characterisation of four classes of bacterial metalloproteins, including two that we denote as anglerases reflecting their potential to capture transition metal ions from the bacterial environment.

PubMed: 41115942
DOI: 10.1038/s41467-025-64309-x

実験手法

X-RAY DIFFRACTION (1.44 Å)