Accession ARO:3000423
CARD Short NameFomA
DefinitionIn the presence of ATP and magnesium (II), fosfomycin gets phosphorylated at the phosphate group resulting in a diphosphate group which inactivates the antibiotic.
AMR Gene FamilyFom phosphotransferase family
Drug Classphosphonic acid antibiotic
Resistance Mechanismantibiotic inactivation
Classification10 ontology terms | Show
Parent Term(s)2 ontology terms | Show
+ confers_resistance_to_antibiotic fosfomycin [Antibiotic]
+ Fom phosphotransferase family [AMR Gene Family]

Kobayashi S, et al. 2000. Antimicrob Agents Chemother 44(3): 647-650. Characterization of the fomA and fomB gene products from Streptomyces wedmorensis, which confer fosfomycin resistance on Escherichia coli. (PMID 10681332)

Pakhomova S, et al. 2008. J Biol Chem 283(42): 28518-28526. Crystal structure of fosfomycin resistance kinase FomA from Streptomyces wedmorensis. (PMID 18701452)


Prevalence of FomA among the sequenced genomes, plasmids, and whole-genome shotgun assemblies available at NCBI or IslandViewer for 413 important pathogens (see methodological details and complete list of analyzed pathogens). Values reflect percentage of genomes, plasmids, genome islands, or whole-genome shotgun assemblies that have at least one hit to the AMR detection model. Default view includes percentages calculated based on Perfect plus Strict RGI hits. Select the checkbox to view percentages based on only Perfect matches to AMR reference sequences curated in CARD (note: this excludes resistance via mutation as references in protein variant models are often wild-type, sensitive sequences).

Prevalence: protein homolog model

SpeciesNCBI ChromosomeNCBI PlasmidNCBI WGSNCBI GI
No prevalence data

Detection Models

Model Type: protein homolog model

Model Definition: Protein Homolog Models (PHM) detect protein sequences based on their similarity to a curated reference sequence, using curated BLASTP bitscore cut-offs. Protein Homolog Models apply to all genes that confer resistance through their presence in an organism, such as the presence of a beta-lactamase gene on a plasmid. PHMs include a reference sequence and a bitscore cut-off for detection using BLASTP. A Perfect RGI match is 100% identical to the reference protein sequence along its entire length, a Strict RGI match is not identical but the bit-score of the matched sequence is greater than the curated BLASTP bit-score cutoff, Loose RGI matches have a bit-score less than the curated BLASTP bit-score cut-off.

Bit-score Cut-off (blastP): 500

>gb|BAA32493.1|+|FomA [Streptomyces wedmorensis]

>gb|AB016934.1|+|6576-7376|FomA [Streptomyces wedmorensis]