Phife (born Malik Taylor), who famously labeled himself “the Funky Diabetic” in several Tribe songs, had battled with ill health in recent years and underwent a kidney transplant in 2008, following renal failure due to diabetes complications. He went on to become a diabetes advocate and shared his story in the 2012 documentary Beats, Rhymes and Life. Phife passed away this week at age 45.

A Tribe Called Quest was formed in the late 1980s by Phife, Q-Tip (born Jonathan Davis), DJ Ali Shaheed Muhammad and Jarobi White (who would leave the group at the height of its success). The act signed to Jive Records and released the first album of five studio albums, People’s Instinctive Travels and the Paths of Rhythm, in 1990.

J. Cole Remixes A Tribe Called Quest’s ‘Can I Kick It?’ for 25th Anniversary Reissue

The group would go on to make its mark as one of the most progressive hip-hop acts of its time. And commercial success didn’t elude them. ATCQ’s 1996 album Beats, Rhymes and Life reached No. 1 on the Billboard 200 and its follow-up, The Love Movement from 1998, peaked at No .3 on the chart (another, earlier set, Midnight Marauders, reached No. 8 on the U.S. chart in 1993). They were rewarded in 2005 with a Special Achievement Award at the Billboard R&B Hip-Hop Awards in Atlanta.

Phife, who had the nicknames “Five Foot Assassin” and “The Five Footer” because of his diminutive height (he stood at 5 ft. 3 in), released a solo album, Ventilation: Da LP, in 2000.

His group sporadically reunited over the past decade, including a performance for The Tonight Show Starring Jimmy Fallon last November. The late-night appearance coincided with the 25th anniversary release of the group’s iconic debut album featuring remixes helmed by Pharrell, CeeLo Green and J. Cole.