ST. LOUIS (AP) - Chuck Berry, the rock 'n' roll founder who defined its joy and rebellion in "Johnny B. Goode" and other classics, has died in St. Charles County, Missouri, west of St. Louis. He was 90 years old.

St. Charles County police say they responded to a medical emergency Saturday afternoon and found Berry unresponsive.

He could not be revived and was pronounced dead.

Berry hit the Top 10 in 1955 with "Maybellene" and went on to influence generations of musicians. Among his other hits were "Johnny B. Goode" and "Roll Over Beethoven."

Saturday evening Berry was remembered fondly at the Big Easy Blues Bar. His music blared through the jukebox speakers at the Houston club.

"Chuck Berry was the guy who put that da da da rhythm into the blues and it was remarkable." said Thomas McClendon, owners of the bar.

"As a guitar player, it's a great loss, I mean Chuck Berry was a legend, crossed a lot of barriers and opened a lot of doors for a lot of people" said musician David Carter.

Fans of the Grammy-winning artist said while the Legend may be gone, his music and his legacy will live on.