LST–1078 was laid down 27 March 1945 by Bethlehem Shipbuilding Co., Hingham, Massachusetts; launched 25 April 1945; and commissioned 15 May 1945.

Departing Hawaiian waters 31 August, she debarked Army occupation troops at Wakayama, Japan, 29 September.

Departing Japan 4 November, she sailed via Guam and Tinian to Pearl Harbor, arriving 6 December.

Returned to active status in February 1951, Proton underwent conversion to AKS–28 at Mare Island Naval Shipyard.

Arriving Naval Supply Center, Oakland, California, 22 December, Proton was placed out of commission, in reserve, 22 April 1958.