The function of ENSG00000172273 (HINFP, histone H4 transcription factor) is as follows. Transcriptional repressor that binds to the consensus sequence 5'-CGGACGTT-3' and to the RB1 promoter. Transcriptional activator that promotes histone H4 gene transcription at the G1/S phase transition in conjunction with NPAT. Also activates transcription of the ATM and PRKDC genes. Autoregulates its expression by associating with its own promoter. {ECO:0000269|PubMed:11553631, ECO:0000269|PubMed:14585971, ECO:0000269|PubMed:14752047, ECO:0000269|PubMed:15988025, ECO:0000269|PubMed:17163457, ECO:0000269|PubMed:17974976, ECO:0000269|PubMed:18850719}.