Accession ARO:3000001
DefinitionBeta-lactamases are enzymes (EC produced by some bacteria and are responsible for their resistance to beta-lactam antibiotics like penicillins, cephalosporins (are relatively resistant to beta-lactamase), cephamycins, and carbapenems (ertapenem). These antibiotics have a common element in their molecular structure: a four-atom ring known as a beta-lactam. The lactamase enzyme breaks that ring open, deactivating the molecule's antibacterial properties. Beta-lactam antibiotics are typically used to treat a broad spectrum of gram-positive and gram-negative bacteria. Beta-lactamases produced by gram-negative organisms are usually secreted.
Resistance Mechanismantibiotic inactivation
Classification4 ontology terms | Show
Parent Term(s)1 ontology terms | Show
4 ontology terms | Show

Bush K, et al. 1995. Antimicrob Agents Chemother 39(6): 1211-1233. A functional classification scheme for beta-lactamases and its correlation with molecular structure. (PMID 7574506)

Pillai DR, et al. 2011. CMAJ 183(1): 59-64. New Delhi metallo-beta-lactamase-1 in Enterobacteriaceae: emerging resistance. (PMID 21220461)

Ambler RP. 1980. Philos Trans R Soc Lond B Biol Sci 289(1036): 321-331. The structure of beta-lactamases. (PMID 6109327)

Bush K and Jacoby GA. 2010. Antimicrob Agents Chemother 54(3): 969-976. Updated functional classification of beta-lactamases. (PMID 19995920)