Signal-strapping as a protein-sequence search method for the discovery of metalloproteins.

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 appro

SUBMITTER: Franco Cairo JPL 

PROVIDER: S-EPMC12537917 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature