To learn more about the protein that appears to match with your unknown, you can follow links from the NCBI entries. These link to protein database, which contain more detailed information on the function of the protein. In some cases, proteins with the same function will have different names, for historical reasons. Alternatively, proteins that have evolved from a common ancestor, but still share common features, will appear in neighbor lists. It is important to realize that identification of sequences by database searches do not carry the weight of biochemical experimentation.
Proteins evolve, along with their functions, such as enzymatic activities.
At the same time, database searches provide a rapid way of identifying the likely function of a newly-cloned gene, pointing the way to further research.