Turkish Foreign Minister Ahmet Davutoglu met with his Iranian counterpart Manuchehr Mottaki on Saturday.
Davutoglu said Turkey, which earlier this year said it was trying to bridge U.S.-Iranian differences, wanted to see the dispute resolved and sanctions removed as it was seeking to boost economic and other ties with its neighbour.
"We want to prepare the ground for ... lifting of sanctions and resolution of all the issues through negotiations," he said, according to Iran's English-language Press TV.
Iran has the world's second largest gas reserves, but has no major net exports, partly because of U.S. and U.N. sanction, Reuters said.
Turkey and four European Union countries in July signed a transit deal for the Nabucco gas pipeline, aimed at cutting Europe's dependence on Russia, but no concrete supply deals have yet been signed for the 7.9-billion-euro project.
"We believe that Iran's energy resources must play a more vital role in supplying global energy needs," said Davutoglu.
Meanwhile, Manouchehr Mottaki, Iran's foreign minister, on Saturday welcomed an acceptance by the US and five partner countries of Tehran's offer to hold negotiations.
Iran on Wednesday handed over a five-page proposal to the 5+1 states, including the United States, in which Tehran said it was willing to discuss global nuclear disarmament as well as other international issues.
Washington accepts on Friday Iran's offer. A U.S. State Department spokesman said Washington would "seek an early meeting and... test Iran's willingness to engage."
Washington would "bring up the nuclear issue, and we'll see how Iran responds to that," spokesman P.J. Crowley told reporters in Washington.
Speaking in Tehran, the Iranian capital, he added "should conditions be ripe, there is a possibility of talks about the nuclear issue".
"We cannot have any compromise with respect to the Iranian nation's inalienable right," Mottaki told a news conference.