Proteomics

Dataset Information

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A novel strategy to characterize the pattern of β-lactam antibiotic-induced drug resistance in Acinetobacter baumannii.


ABSTRACT: Carbapenem-resistant Acinetobacter baumannii (CRAb) is an urgent public health threat, according to the CDC. This pathogen has few treatment options and causes severe nosocomial infections with >50% fatality rate. Although previous studies have examined the proteome of CRAb, there have been no focused analyses of dynamic changes to β-lactamase expression that may occur due to drug exposure. Here, we present our initial proteomic study of variation in β-lactamase expression that occurs in CRAb with different β-lactam antibiotics. Briefly, drug resistance to Ab (ATCC 19606) was induced by the administration of various classes of β-lactam antibiotics, and the cell-free supernatant was isolated, concentrated, separated by SDS-PAGE, digested with trypsin, and identified by label-free LC-MS-based quantitative proteomics. Thirteen proteins were identified and evaluated using a 1789 sequence database of Ab β-lactamases from UniProt, the majority of which were Class C β-lactamases (≥80%). Importantly, different antibiotics, even those of the same class (e.g. penicillin and amoxicillin), induced non-equivalent responses comprising various isoforms of Class C and D serine-β-lactamases, resulting in unique resistomes. These results open the door to a new approach of analyzing and studying the problem of multi-drug resistance in bacteria that rely strongly on β-lactamase expression.

INSTRUMENT(S): timsTOF Pro 2

ORGANISM(S): Acinetobacter Baumannii A424 Bacteria

DISEASE(S): Bacterial Infectious Disease

SUBMITTER: Belinda Willard  

LAB HEAD: Woo Shik Shin

PROVIDER: PXD042336 | Pride | 2023-07-20

REPOSITORIES: Pride

Dataset's files

Source:
Action DRS
A.baumannii_beta-lactamase_sequence_2639_library_fasta.fasta Fasta
sdrf.tsv Tabular
tims_21nov0901_Slot1-6_1_313.d.zip Other
tims_21nov0901_Slot1-6_1_313.mzML Mzml
tims_21nov0901_Slot1-6_1_313.pepXML Pepxml
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Publications

A novel strategy to characterize the pattern of β-lactam antibiotic-induced drug resistance in Acinetobacter baumannii.

Hillyer Trae T   Benin Bogdan M BM   Sun Chuanqi C   Aguirre Noah N   Willard Belinda B   Sham Yuk Yin YY   Shin Woo Shik WS  

Scientific reports 20230606 1


Carbapenem-resistant Acinetobacter baumannii (CRAb) is an urgent public health threat, according to the CDC. This pathogen has few treatment options and causes severe nosocomial infections with > 50% fatality rate. Although previous studies have examined the proteome of CRAb, there have been no focused analyses of dynamic changes to β-lactamase expression that may occur due to drug exposure. Here, we present our initial proteomic study of variation in β-lactamase expression that occurs in CRAb w  ...[more]

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