{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T15:58:17Z","timestamp":1784735897870,"version":"3.55.0"},"reference-count":35,"publisher":"Walter de Gruyter GmbH","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,3,28]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Penicillin-binding proteins (PBPs) are integral to bacterial cell division as they mediate the final steps of cell wall maturation. Selective fluorescent probes are useful for understanding the role of individual PBPs, including their localization and activity during growth and division of bacteria. For the development of new selective probes for PBP imaging, several <jats:italic>\u03b2<\/jats:italic>-lactam antibiotics were screened, as they are known to covalently bind PBP <jats:italic>in vivo<\/jats:italic>. The PBP inhibition profiles of 16 commercially available <jats:italic>\u03b2<\/jats:italic>-lactam antibiotics were evaluated in an unencapsulated derivative of the D39 strain of <jats:italic>Streptococcus pneumoniae<\/jats:italic>, IU1945. These <jats:italic>\u03b2<\/jats:italic>-lactams have not previously been characterized for their PBP inhibition profiles in <jats:italic>S.\u00a0pneumoniae<\/jats:italic> and these data augment those obtained from a library of 20 compounds that we previously reported. We investigated seven penicillins, three carbapenems, and six cephalosporins. Most of these <jats:italic>\u03b2<\/jats:italic>-lactams were found to be co-selective for PBP2x and PBP3, as was noted in our previous studies. Six out of 16 antibiotics were selective for PBP3 and one molecule was co-selective for PBP1a and PBP3. Overall, this work expands the chemical space available for development of future <jats:italic>\u03b2<\/jats:italic>-lactam-based probes for specific pneumococcal PBP labeling and these methods can be used for the development of probes for PBP labelling in other bacterial species.<\/jats:p>","DOI":"10.1515\/hsz-2021-0386","type":"journal-article","created":{"date-parts":[[2022,2,26]],"date-time":"2022-02-26T17:22:00Z","timestamp":1645896120000},"page":"433-443","source":"Crossref","is-referenced-by-count":15,"title":["Expanded profiling of <i>\u03b2<\/i>-lactam selectivity for penicillin-binding proteins in <i>Streptococcus pneumoniae<\/i> D39"],"prefix":"10.1515","volume":"403","author":[{"given":"Deepti","family":"Sharan","sequence":"first","affiliation":[{"name":"Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , MN 55455 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8287-8893","authenticated-orcid":false,"given":"Erin E.","family":"Carlson","sequence":"additional","affiliation":[{"name":"Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , MN 55455 , USA"},{"name":"Department of Medicinal Chemistry , University of Minnesota , 208 Harvard Street SE , Minneapolis , MN 55454 , USA"},{"name":"Department of Biochemistry, Molecular Biology, and Biophysics , University of Minnesota , 321 Church St SE , Minneapolis , MN 55454 , USA"},{"name":"Department of Pharmacology, University of Minnesota , 321 Church St SE , Minneapolis , MN 55454 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"374","published-online":{"date-parts":[[2022,2,28]]},"reference":[{"key":"2022031213473318700_j_hsz-2021-0386_ref_001","doi-asserted-by":"crossref","unstructured":"Blumberg, P.M., Yocum, R.R., Willoughby, E., and Strominger, J.L. 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