PXD077803-1

PXD077803 is an original dataset announced via ProteomeXchange.

Title	Myxobacterial metallo-β-lactamases
Description	Understanding the biology of B1 metallo-β-lactamases (MβLs) in their native hosts and the molecular bases of the adaptive mechanisms during the transfer process to human pathogens, may provide novel therapeutic insights against these important resistance factors. Through large scale phylogenomic analyses, we identified Bacteroidota and Myxococcota as the primary hosts of the enzymes in environmental habitats. The monophyletic lineage of MβL homologues from the predatory members of the latter phylum shared common ancestry with clinically relevant families found in γ-Proteobacteria, highlighting their evolutionary significance. Resistance phenotypes and biochemical properties of native MβLs from three myxobacterial genera expressed in the model γ-proteobacterium, Escherichia coli, and comparisons with the New Delhi Metallo-β-lactamase revealed that evolution of the enzymes concerned mainly adaptations enhancing their production in the new hosts rather than functional differentiation. Periplasmic localization is the main evolved trait, with E. coli not recognizing optimally the signal peptides of the environmental MβLs which were secreted as soluble proteins in the cell envelope despite predicted to be lipoproteins. The unique features of N-terminal secretory signals of myxobacterial MβLs likely reflected the enzymes integration into the physiology of their hosts and pointed to naturally occurring molecules potentially controlling their expression.
HostingRepository	PRIDE
AnnounceDate	2026-05-20
AnnouncementXML	Submission_2026-05-20_08:57:06.622.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Martina Samiotaki
SpeciesList	scientific name: Myxococcales; NCBI TaxID: NEWT:29;
ModificationList	monohydroxylated residue; iodoacetamide derivatized residue
Instrument	Q Exactive HF-X

Revision	Datetime	Status	ChangeLog Entry
0	2026-04-29 09:41:05	ID requested
⏵ 1	2026-05-20 08:57:07	announced

Dataset with its publication pending

submitter keyword: MYX-2, MYX-1,myxobacteria

Stathis D. Kotsakis
contact affiliation	Laboratory of Bacteriology, Hellenic Pasteur Institute, Athens, Greece
contact email	skotsakis@pasteur.gr
lab head
Martina Samiotaki
contact affiliation	Protein Analysis Laboratory B.S.R.C. "Alexander Fleming", Alexander Fleming Street 34 16672, Vari, Greece
contact email	samiotaki@fleming.gr
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2026/05/PXD077803

PRIDE project URI

• PRIDE
  1. PXD077803
     1. Label: PRIDE project
     2. Name: Myxobacterial metallo-β-lactamases