This gene encodes a member of the cupin superfamily. The encoded protein is an Fe(II)-containing nuclear protein expressed in all tissues of the body and concentrated within dot-like subnuclear structures. Interactions with nuclear factor I/CCAAT box transcription factor as well as B cell lymphoma 3-encoded oncoprotein suggest the encoded protein may act as a transcriptional cofactor and be involved in the regulation of DNA transcription and replication. Alternatively spliced transcript variants have been described.
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Zeng Q, Li X, Bartlam M, et al. (2004). "Purification, crystallization and preliminary X-ray analysis of human pirin.". Acta Crystallogr. D. 59 (Pt 8): 1496–8. doi:10.1107/S0907444903012289. PMID12876364.
Dechend R, Hirano F, Lehmann K, et al. (1999). "The Bcl-3 oncoprotein acts as a bridging factor between NF-kappaB/Rel and nuclear co-regulators.". Oncogene. 18 (22): 3316–23. doi:10.1038/sj.onc.1202717. PMID10362352.