Downtown L.A.’s Commerce Escrow Co. and affiliate RPM Investments Inc. have been acquired by Opus Bank of Irvine in a cash-and-stock deal.

Opus will pay $25 million for the two companies, with 55 percent payable in bank stock and the rest in cash.

Commerce, a downtown Los Angeles escrow firm, focuses on commercial business and commercial real estate transactions. RPM acts as an intermediary for tax-deferred transactions. The two companies currently facilitate escrow and exchange deals that involve deposit balances of more than $700 million.

Mark Minsky, president of Commerce and RPM, will oversee the separate units as senior manager director. The transaction is expected to close by March 31.