The US Dollar and the Turkish Lira do not make a major or a commodity pair. The USD is obviously a major, while the TKY is not. The Turkish economy is rather commodity-focused and commodities do indeed play a major role in the US economy too.
The USD is the currency to which all other currencies are compared, and which is used for the trading of major commodities such as gold and oil. The USD was the first currency to float in the 1970s.
The USD is backed by a diverse and massive economy, the biggest one in the world. The most significant sectors of the US economy are the energy sector, banking, manufacturing, commodities and agriculture.
The greenback is under the control of the Federal Reserve, which manipulates lending interest rates to influence the relative value of the currency.
Value fluctuation-wise, the Turkish Lira is quite possibly the most troubled currency in history. First introduced in 1844, it was devalued to almost naught several times. Its last re-introduction happened in 2007, when it hit the market at about 1.25 for a USD. Nowadays, the exchange rate on the pair is around the 3.5 mark, so the TKY has indeed lost quite a bit of value recently too.
Agricultural exports represent the backbone of the Turkish economy. Oil and textiles play an important role as well. With that in mind, the TKY can indeed be considered a commodity currency.
Given the stability of the USD, trading opportunities on this pair usually emerge from the side of the TKY. The state of the Turkish economy is a major factor in this regard, though political instability – which often plagues the country- cannot be discounted either. Turkey has wanted to join the EU and the Euro for some time, but it looks like that ambition will have to be put to rest.