|CARD Short Name
|LamB is a maltoporin that negatively regulates antibiotic resistance. Knockout strains of lamB are shown to exhibit higher levels of resistance than wild-type strains. Mutations in the lamB gene of Klebsiella are associated with resistance to ceftazidime-avibactam.
|AMR Gene Family
|Sugar Porin (SP)
|tetracycline antibiotic, cephalosporin, fluoroquinolone antibiotic
|reduced permeability to antibiotic
|11 ontology terms | Show
+ process or component of antibiotic biology or chemistry
+ antibiotic molecule
+ mechanism of antibiotic resistance
+ beta-lactam antibiotic
+ determinant of antibiotic resistance
+ reduced permeability to antibiotic [Resistance Mechanism]
+ protein modulating permeability to antibiotic
+ tetracycline antibiotic [Drug Class]
+ cephalosporin [Drug Class]
+ fluoroquinolone antibiotic [Drug Class]
|2 ontology terms | Show
Guo Y, et al. 2021. Emerg Microbes Infect 10(1):2042-2051 Mutations in porin LamB contribute to ceftazidime-avibactam resistance in KPC-producing Klebsiella pneumoniae. (PMID 34551677)
Prevalence of Klebsiella pneumoniae lamB with mutations conferring resistance to ceftazidime-avibactam 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).
|No prevalence data
Model Type: protein variant model
Model Definition: Protein Variant Models (PVM) perform a similar search as Protein Homolog Models (PHM), i.e. detect protein sequences based on their similarity to a curated reference sequence, but secondarily screen query sequences for curated sets of mutations to differentiate them from antibiotic susceptible wild-type alleles. PVMs are designed to detect AMR acquired via mutation of house-keeping genes or antibiotic targets, e.g. a mutated gyrase resistant to aminocoumarin antibiotics. PVMs include a protein reference sequence (often from antibiotic susceptible wild-type alleles), a curated bit-score cut-off, and mapped resistance variants. Mapped resistance variants may include any or all of single point mutations, insertions, or deletions curated from the scientific literature. A Strict RGI match has a BLASTP bit-score above the curated BLASTP cutoff value and contains at least one curated mutation from amongst the mapped resistance variants, while a Loose RGI match has a bit-score less than the curated BLASTP bit-score cut-off but still contains at least one curated mutation from amongst the mapped resistance variants.
Bit-score Cut-off (blastP): 800