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Full-Text Articles in Life Sciences
Rad51 Nucleoprotein Filament Disassembly Captured Using Fluorescent Plasmodium Falciparum Ssb As A Reporter For Single-Stranded Dna, Eric Parker Davenport, Derek F. Harris, Sofia Origanti, Edwin Antony
Rad51 Nucleoprotein Filament Disassembly Captured Using Fluorescent Plasmodium Falciparum Ssb As A Reporter For Single-Stranded Dna, Eric Parker Davenport, Derek F. Harris, Sofia Origanti, Edwin Antony
Biological Sciences Faculty Research and Publications
Single-stranded DNA binding (SSB) proteins coordinate DNA replication, repair, and recombination and are critical for maintaining genomic integrity. SSB binds to single-stranded DNA (ssDNA) rapidly and with very high affinity making it a useful molecular tool to detect free ssDNA in solution. We have labeled SSB from Plasmodium falciparum (Pf-SSB) with the MDCC (7-diethylamino-3-((((2-maleimidyl)ethyl)amino)-carbonyl)coumarin) fluorophore which yields a four-fold increase in fluorescence upon binding to ssDNA. Pf-SSBMDCC binding to DNA is unaffected by NaCl or Mg2+ concentration and does not display salt-dependent changes in DNA binding modes or cooperative binding on long DNA substrates. These …