4B2P

RadA C-terminal ATPase domain from Pyrococcus furiosus bound to GTP

Summary for 4B2P

• Entry DOI: 10.2210/pdb4b2p/pdb
• Related: 1PZN 4A6P 4A6X 4A74 4A7O 4B2I 4B2L
• Descriptor: DNA REPAIR AND RECOMBINATION PROTEIN RADA, GUANOSINE-5'-TRIPHOSPHATE, MAGNESIUM ION, ... (5 entities in total)
• Functional Keywords: hydrolase
• Biological source: PYROCOCCUS FURIOSUS
• Total number of polymer chains: 1
• Total formula weight: 26241.82

Authors

Marsh, M.E.,Ehebauer, M.T.,Scott, D.,Abell, C.,Blundell, T.L.,Hyvonen, M. (deposition date: 2012-07-17, release date: 2013-07-24, Last modification date: 2023-12-20)

Primary citation

Marsh, M.E.,Scott, D.E.,Ehebauer, M.T.,Abell, C.,Blundell, T.L.,Hyvonen, M.
ATP Half-Sites in Rada and Rad51 Recombinases Bind Nucleotides
FEBS Open Bio, 6:372-, 2016

PubMed Abstract: Homologous recombination is essential for repair of DNA double-strand breaks. Central to this process is a family of recombinases, including archeal RadA and human RAD51, which form nucleoprotein filaments on damaged single-stranded DNA ends and facilitate their ATP-dependent repair. ATP binding and hydrolysis are dependent on the formation of a nucleoprotein filament comprising RadA/RAD51 and single-stranded DNA, with ATP bound between adjacent protomers. We demonstrate that truncated, monomeric Pyrococcus furiosus RadA and monomerised human RAD51 retain the ability to bind ATP and other nucleotides with high affinity. We present crystal structures of both apo and nucleotide-bound forms of monomeric RadA. These structures reveal that while phosphate groups are tightly bound, RadA presents a shallow, poorly defined binding surface for the nitrogenous bases of nucleotides. We suggest that RadA monomers would be constitutively bound to nucleotides in the cell and that the bound nucleotide might play a structural role in filament assembly.

PubMed: 27419043
DOI: 10.1002/2211-5463.12052

Experimental method

X-RAY DIFFRACTION (1.6 Å)