With New Antibiotic in Hand, RQx Pharmaceuticals Looks for Partner

Arylomycin molecule nestled in Signal Peptidase binding site

The genesis of San Diego’s RQx Pharmaceuticals began in 2010, with a chance encounter by two strangers at Zumbar Coffee & Tea in Sorrento Valley.

Floyd Romesberg says he likes to start his day at Zumbar because it’s a good place to get some paperwork done before he heads into The Scripps Research Institute, where his lab is focused on biological and biophysical chemistry, particularly on the processes affected by the forces of evolution. Court Turner, who is a life sciences venture partner at San Diego’s Avalon Ventures, also hangs out at Zumbar before work.

They had noticed each other before, but never spoke—until one day when Romesberg says their eyes met after he overheard Turner in an extended, biotech-themed conversation. Romesberg says he asked the young stranger, “So you’re a VC?”

TSRI Associate Professor of Chemistry Floyd Romesberg
Floyd Romesberg

In their ensuing conversation, Romesberg outlined his interest in antibiotics, a field of growing concern among healthcare providers due to the increasing number of drug-resistant pathogens. MRSA, also known as multidrug-resistant Staphylococcus aureus, may be the best known example of these infectious killers because of its prevalence in hospitals. But it is just one in a group of troubling, drug-resistant microbes known as the “ESKAPE” pathogens, for E. faecium, S. aureus, K. pneumoniae, A. baumanii, P. aeruginosa and E. coli.

Romesberg said his lab had made a breakthrough with arylomycin, a compound found in nature that was known to work as an antibiotic on just a few types of bacteria. Eli Lilly, Bristol-Myers Squibb, GlaxoSmithKline, and other pharma giants had tried for

Author: Bruce V. Bigelow

In Memoriam: Our dear friend Bruce V. Bigelow passed away on June 29, 2018. He was the editor of Xconomy San Diego from 2008 to 2018. Read more about his life and work here. Bruce Bigelow joined Xconomy from the business desk of the San Diego Union-Tribune. He was a member of the team of reporters who were awarded the 2006 Pulitzer Prize in National Reporting for uncovering bribes paid to San Diego Republican Rep. Randy “Duke” Cunningham in exchange for special legislation earmarks. He also shared a 2006 award for enterprise reporting from the Society of Business Editors and Writers for “In Harm’s Way,” an article about the extraordinary casualty rate among employees working in Iraq for San Diego’s Titan Corp. He has written extensively about the 2002 corporate accounting scandal at software goliath Peregrine Systems. He also was a Gerald Loeb Award finalist and National Headline Award winner for “The Toymaker,” a 14-part chronicle of a San Diego start-up company. He takes special satisfaction, though, that the series was included in the library for nonfiction narrative journalism at the Nieman Foundation for Journalism at Harvard University. Bigelow graduated from U.C. Berkeley in 1977 with a degree in English Literature and from the Columbia University Graduate School of Journalism in 1979. Before joining the Union-Tribune in 1990, he worked for the Associated Press in Los Angeles and The Kansas City Times.