The function of IGHMBP2 (immunoglobulin mu DNA binding protein 2, Ensembl gene identifier ENSG00000132740) is as follows. 5' to 3' helicase that unwinds both RNA and DNA duplexes in an ATP-dependent reaction (Probable) (PubMed:19158098, PubMed:30218034). Specific to 5'-phosphorylated single-stranded guanine-rich sequences (PubMed:22999958, PubMed:8349627). May play a role in RNA metabolism, ribosome biogenesis or initiation of translation (PubMed:19158098, PubMed:19299493). May play a role in regulation of transcription (By similarity). Interacts with tRNA-Tyr (PubMed:19299493). Has low processivity (PubMed:30218034). {ECO:0000250|UniProtKB:Q9EQN5, ECO:0000269|PubMed:19158098, ECO:0000269|PubMed:19299493, ECO:0000269|PubMed:22999958, ECO:0000269|PubMed:30218034, ECO:0000269|PubMed:8349627, ECO:0000305|PubMed:22965130}.