SSBP2 is a single-stranded DNA-binding protein that functions primarily as a transcriptional regulator and tumor suppressor. At the molecular level, SSBP2 stabilizes the architectural transcription cofactor LDB1 from proteasomal degradation 1, enabling LDB1-mediated long-range chr5 looping between enhancers and promoters 2. SSBP2 forms part of the LDB1 complex through its conserved LUFS domain, which mediates tetramerization and facilitates LDB1 dimerization 34. This complex regulates tissue-specific transcription, particularly in hematopoietic and developmental contexts 2. Clinically, SSBP2 loss is associated with multiple malignancies. Frequent loss of SSBP2 expression occurs in acute myeloid leukemia (AML), where its reintroduction causes G1 arrest, differentiation, and C-MYC downregulation 5. SSBP2-deficient mice show increased susceptibility to B-cell lymphomas and carcinomas 1. SSBP2 is essential for hematopoietic stem cell maintenance and stress response; its loss results in hypoplastic hematopoietic tissues and impaired HSC function 6. Notably, SSBP2 mutations have been identified as candidate causal genes in congenital kidney and urinary tract malformations 7. Interestingly, in hepatocellular carcinoma, SSBP2 expression correlates with poor prognosis and aggressive features, suggesting context-dependent oncogenic potential 8.