Protagonist to Announce Fourth Quarter and Year-End 2017 Financial Results on March 7, 2018; Year-End Update Call to Follow

On March 1, 2018 Protagonist Therapeutics, Inc. (NASDAQ: PTGX), a biopharmaceutical company developing novel peptide-based drugs to address significant unmet medical needs, reported fourth quarter and year-end 2017 financial results after the NASDAQ market closes on Wednesday, March 7, 2018 (Press release, Protagonist, MAR 1, 2018, View Source;p=RssLanding&cat=news&id=2335543 [SID1234524323]). Protagonist management will host a year-end update call at 4:30 p.m. Eastern Time/1:30 p.m. Pacific Time the same day.

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Conference Call and Webcast Details:

Date: Wednesday, March 7, 2018

Time: 4:30 PM (ET) / 1:30 PM (PT)

US/CANADA Toll-free: (844) 515-9178

International: (614) 999-9313

Conference ID: 4054387

Webcast URL: www.protagonist-inc.com under "Events & Presentations" on the Investors page of the company’s website