{Reference Type}: Journal Article
{Title}: Identification and characterization of CIM-1, a carbapenemase that adds to the family of resistance factors against last resort antibiotics.
{Author}: Wang Y;Sapula SA;Whittall JJ;Blaikie JM;Lomovskaya O;Venter H;
{Journal}: Commun Biol
{Volume}: 7
{Issue}: 1
{Year}: 2024 Mar 7
{Factor}: 6.548
{DOI}: 10.1038/s42003-024-05940-0
{Abstract}: The increasing rate of carbapenem-resistant bacteria within healthcare environments is an issue of great concern that needs urgent attention. This resistance is driven by metallo-β-lactamases (MBLs), which can catalyse the hydrolysis of almost all clinically available β-lactams and are resistant to all the clinically utilized β-lactamase inhibitors. In this study, an uncharacterized MBL is identified in a multidrug resistant isolate of the opportunistic pathogen, Chryseobacterium indologenes. Sequence analysis predicts this MBL (CIM-1) to be a lipoprotein with an atypical lipobox. Characterization of CIM-1 reveals it to be a high-affinity carbapenemase with a broad spectrum of activity that includes all cephalosporins and carbapenems. Results also shown that CIM-1 is potentially a membrane-associated MBL with an uncharacterized lipobox. Using prediction tools, we also identify more potentially lipidated MBLs with non-canonical lipoboxes highlighting the necessity of further investigation of lipidated MBLs.