Single-stranded DNA-binding protein 2 (SSBP2)

Single-stranded DNA-binding protein 2 (SSBP2) is a highly conserved human protein encoded by the SSBP2 gene located on chromosome 5q13–14[5][7]. It belongs to a family of single-stranded DNA-binding proteins that are crucial in processes such as DNA replication, recombination, and repair, thus contributing to genomic stability[2][6]. SSBP2 is also recognized as a tumor suppressor, with its loss or disruption implicated in various human cancers, including acute myeloid leukemia and prostate cancer[3]. Biochemically, SSBP2 functions predominantly through its interaction with the LIM domain-binding protein 1 (LDB1), stabilizing LDB1 and protecting it from proteasomal degradation, thereby regulating the assembly and function of key transcriptional complexes involved in hematopoiesis, development, and Wnt/β-catenin signaling pathways[1][3]. Structurally, SSBP2 contains a conserved LUFS (LUG/LUH, Flo8 and SSBP/SSDP) domain that mediates oligomerization and protein-protein interactions[1][3]. Despite its centrality in several DNA-related processes and gene regulatory complexes, there are currently no known drugs directly targeting SSBP2, nor are there specific safety concerns reported with therapeutic modulation of the protein in the literature to date. Its role as a biomarker is under investigation, particularly in the context of chromosome 5q deletions commonly observed in certain leukemias[3].

Other names

Single-stranded DNA-binding protein 2SSBP2SSDP2HSPC116SOSS-B2Sequence-specific single-stranded-DNA-binding protein 2

Not established for drugs in clinical use; mechanistically, SSBP2 acts biologically by binding to LDB1 and stabilizing transcriptional complexes, influencing the expression of genes critical for hematopoiesis and development[1][3].