Star Trek creator Gene Roddenberry's collection of personal effects and show memorabilia are going up for auction.

Hand-noted scripts, costumes from the show and Roddenberry's own studio pass are among the items available at the June 27 auction in Las Vegas.

Proceeds will benefit the Roddenberry Foundation, which makes grants to support children, education and the environment.

The original Captain Kirk, William Shatner, is also getting in on the auction, selling his custom Harley-Davidson motorbike, his Golden Globe nomination certificate and the plaque he was presented with when he got a star on Hollywood's Walk of Fame in 1983.

Mr Shatner plans to donate a portion of the proceeds to the Hollywood Charity Horse Show, which helps handicapped children.

The 79-year-old actor said he does not mind parting with his mementoes and would do just about anything to benefit his chosen charities. "I had the great fortune of doing the same thing with a kidney stone,"

Mr Shatner said. "I passed a kidney stone, and a company offered me ... $75,000 for my kidney stone."

Mr Shatner donated the money to charity.

"I handed the motorcycle over and it was a part of my heart, but that's only figuratively speaking," he said.

The Roddenberry collection will be "very meaningful" to Trek fans, said Mr Shatner, who says the show's optimistic themes are why it has endured for decades.

"It suggests that 300 years from now, mankind is still around," he said. "It's on a note of hope that not only will we be around, but we will flourish and be out there among the stars, colonising."