Purine-rich element binding protein family (IPR006628)

Short name: PUR-bd_fam

Overlapping homologous superfamilies


Family relationships


The purine-rich element binding (Pur) protein family protein consists PURalpha/beta/gamma in humans. Pur-alpha is a highly conserved, sequence-specific DNA- and RNA-binding protein involved in diverse cellular and viral functions including transcription, replication, and cell growth. Pur-alpha has a modular structure with alternating three basic aromatic class I and two acidic leucine-rich class II repeats in the central region of the protein [PMID: 1448097].

In addition to its involved in basic cellular function, Pur-alpha, has been implicated in the development of blood cells and cells of the central nervous system; it has also been implicated in the inhibition of oncogenic transformation and along with Pur-beta in myelodysplastic syndrome progressing to acute myelogenous leukemia. Pur-alpha can influence viral interaction through functional associations, for example with the Tat protein and TAR RNA of HIV-1, and with large T-antigen and DNA regulatory regions of JC virus. JC virus causes opportunistic infections in the brains of certain HIV-1-infected individuals [PMID: 12894583].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0000977 RNA polymerase II regulatory region sequence-specific DNA binding
GO:0032422 purine-rich negative regulatory element binding

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.