Probable transcription factor that binds to the DNA specific sequence 5'-TGAGTCA-3' found in seed storage protein gene promoters (PubMed:11133985). May function as a negative regulator in cold and drought stress responses (PubMed:22189955). Homodimer. Expressed in developing seeds at low levels from 5 to 20 days after flowering (DAF). Induced by cold stress in roots. Plants over-expressing RISBZ5/BZIP52 showed significantly increased sensitivity to cold and drought stresses.