The Hong Kong Monetary Authority (HKMA) and Houston-based Hines have completed a long-anticipated deal to take a 49 percent interest in San Francisco’s Park Tower, for which they ultimately shelled out about $534 million, according to three people familiar with the deal. Last year, Kilroy Realty Corp. set a record for a per-square-foot price in a full-building sale when it paid $1,327 per square foot for 345 Brannan St. MetLife Inc. (NYSE: MET) has owned 95 percent of the building since 2015, with developer John Buck Co. and Golub & Co. holding the remainder.