Transportation
Nitrosococcus oceani genome size is 3.4Mb. Each Mb genome encodes for roughly 35.23 proteins for transportation making up a total of 124 proteins for the whole transportation system. N.oceani' primary transport relies on secondary transportation, secondary is ATP-dependent transportation. 50% of the total transporter proteins are secondary transporter, and 34.7% of the total transporter proteins contributes to ATP-dependent channels. Left with 7.3%, 4%, 4% encode for ion channels, phosphotransferase system, relatively. 4% of the total transporter proteins remained unclassifed.
Ecology
Nitrosococcus oceani impact on ecosystem is the massive release of nitrogen oxide and nitrogen gases into the atmosphere completing the nitrification cycle. Also it contributes to maintain the concentration of nitrate in the nitrogen pool in the deep ocean at 40 µM (Klotz 2006).
In the brackish Ganzirri lake, a correlation of the increasing of particulate organic carbon (POC), particulate organic nitrogen (PON) and the abundance of Nitrosococcus species is found positively (Zaccone 1996). However, a negative correlation was found with oxygen concentration. Interestingly, via immunofluorescent it was reported that there is a overlapping of polyclonal antiserum with rabbits antiserum. These polyclonal antisera were found to be cross-reacted with other ammonia-oxidizing strains, but not with other marine bacteria (Zaccone 1996).