ISTANBUL - Turkey appealed on Wednesday for the world to recognize East Jerusalem as the capital of a Palestinian state, as it opened an Islamic summit called in response to a US decision to recognize the city as Israel's capital."Firstly the Palestinian state must be recognized by all other countries. We must all strive together for this," Turkish Foreign Minister Mevlut Cavusoglu said as foreign ministers convened ahead of the full summit meeting."We must encourage other countries to recognize the Palestinian state on the basis of its 1967 borders with East Jerusalem as its capital," Cavusoglu said.Jerusalem, revered by Jews, Christians and Muslims alike, is home to Islam's third holiest site and has been at the heart of Israeli-Palestinian conflict for decades.US President Donald Trump's announcement last week recognizing the city as Israel's capital led to protests in many Muslim countries. Turkey said it would plunge the world "into a fire with no end".Turkey has invited leaders of the Organization of Islamic Cooperation, a group of more than 50 Muslim nations, to Wednesday's meeting in Istanbul to formulate a joint response to Trump's decision.