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Component of the SOSS complex, a multiprotein complex that functions downstream of the MRN complex to promote DNA repair and G2/M checkpoint. In the SOSS complex, acts as a sensor of single-stranded DNA that binds to single-stranded DNA, in particular to polypyrimidines. The SOSS complex associates with DNA lesions and influences diverse endpoints in the cellular DNA damage response including cell-cycle checkpoint activation, recombinational repair and maintenance of genomic stability. Required for efficient homologous recombination-dependent repair of double-strand breaks (DSBs) and ATM-dependent signaling pathways.
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Protein Aliases: hSSB1; LP3587; Nucleic acid-binding protein 2; oligonucleotide/oligosaccharide-binding fold containing 2B; Oligonucleotide/oligosaccharide-binding fold-containing protein 2B; Sensor of single-strand DNA complex subunit B1; Sensor of ssDNA subunit B1; single strand DNA-binding protein 1; Single-stranded DNA-binding protein 1; SOSS complex subunit B1; SOSS-B1
Gene Aliases: hSSB1; LP3587; NABP2; OBFC2B; SOSS-B1; SSB1
UniProt ID: (Human) Q9BQ15
Entrez Gene ID: (Human) 79035
Molecular Function: nucleic acid metabolism protein