This invention provides recombinant DNA for expression of proteins that are useful for imparting enhanced agronomic trait(s) to transgenic crop plants. Also provided by this invention is transgenic seed for growing a transgenic plant having recombinant DNA in its genome and exhibiting an enhance agronomic trait, i.e. enhanced nitrogen use efficiency, increased yield, enhanced water use efficiency, enhanced tolerance to cold stress and/or improved seed compositions. Also disclosed are methods for identifying such transgenic plants by screening for nitrogen use efficiency, yield, water use efficiency, growth under cold stress, and seed composition changes. This invention also discloses a method of identifying the target genes of a transcription factor.