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FACT complex subunit SSRP1 also known as structure specific recognition protein 1 is a protein that in humans is encoded by the SSRP1 gene.
Function
The protein encoded by this gene is a subunit of a heterodimer that, along with SUPT16H, forms chromatin transcriptional elongation factor FACT. FACT interacts specifically with histonesH2A/H2B to effect nucleosome disassembly and transcription elongation. FACT and cisplatin-damaged DNA may be crucial to the anticancer mechanism of cisplatin. This encoded protein contains a high mobility group box which most likely constitutes the structure recognition element for cisplatin-modified DNA. This protein also functions as a co-activator of the transcriptional activator p63.
Interactions
Structure specific recognition protein 1 has been shown to interact with NEK9.
SSRP1 further interacts with transcriptional activator p63. SSRP1 enhances the activity of full-length p63, but it has no effect on the N-terminus-deleted p63 (DeltaN-p63) variant.
LeRoy G, Orphanides G, Lane WS, Reinberg D (1998). "Requirement of RSF and FACT for transcription of chromatin templates in vitro". Science. 282 (5395): 1900–4. doi:10.1126/science.282.5395.1900. PMID9836642.
Kelley DE, Stokes DG, Perry RP (1999). "CHD1 interacts with SSRP1 and depends on both its chromodomain and its ATPase/helicase-like domain for proper association with chromatin". Chromosoma. 108 (1): 10–25. doi:10.1007/s004120050347. PMID10199952. S2CID12945778.
Santoro P, De Andrea M, Migliaretti G, Trapani C, Landolfo S, Gariglio M (2002). "High prevalence of autoantibodies against the nuclear high mobility group (HMG) protein SSRP1 in sera from patients with systemic lupus erythematosus, but not other rheumatic diseases". J. Rheumatol. 29 (1): 90–3. PMID11824977.