Transcriptional regulator that controls a genetic switch in male development (PubMed:11563911). It is necessary and sufficient for initiating male sex determination by directing the development of supporting cell precursors (pre-Sertoli cells) as Sertoli rather than granulosa cells (PubMed:16996051, PubMed:16414182). Involved in different aspects of gene regulation including promoter activation or repression (PubMed:9525897). Binds to the DNA consensus sequence 5'-[AT]AACAA[AT]-3' (PubMed:1425584, PubMed:8265659, PubMed:8159753, PubMed:11563911, PubMed:15170344). SRY HMG box recognizes DNA by partial intercalation in the minor groove and promotes DNA bending (PubMed:1425584, PubMed:8265659, PubMed:8159753, PubMed:11563911, PubMed:15170344, PubMed:16762365). Also involved in pre-mRNA splicing (PubMed:11818535). In male adult brain involved in the maintenance of motor functions of dopaminergic neurons (By similarity).