European shares slipped on Tuesday, as lingering uncertainty over the outcome of Greece's negotiations with creditors weighed on the region's stock markets, Reuters reported. Greece's leftist government has put forward first proposals for pension reform, the European Union's economics chief said on Tuesday, as debt talks with international creditors reach a crunch point. Greece must repay four loans totalling 1.6 billion euros ($1.8 billion) to the International Monetary Fund this month, starting with a 300 million euro payment on June 5. Athens' benchmark ATG was down by 1 percent while Germany's DAX fell 1.2 percent, leaving the DAX some 9 percent below a record high set in early April. The broader pan-European FTSEurofirst 300 index was down by 1 percent at 1,571.13 points. The index remained steady after data showed that euro zone inflation was higher than expected in May, with equity traders still focusing more on the Greek impasse. The FTSEurofirst 300 has risen 15 percent this year, mainly thanks to the ECB's stimulus programme, and Goldman Sachs strategists saw earnings growth as still supporting the European market, in spite of the Greek problems.