RecA ssDNA Complex 3CMX

Biologic model of RecA ssDNA Complex 3CMX 3D printed in full-color sandstone.

SKU: 3939397468262-reca-ssdna-complex-3cmx Categories: , Tag:


Biologic model of RecA ssDNA Complex 3CMX 3D printed in full-color sandstone.

Protein Description

The RecA family of ATPases mediates homologous recombination, a reaction essential for maintaining genomic integrity and for generating genetic diversity. RecA, ATP and single-stranded DNA (ssDNA) form a helical filament that binds to double-stranded DNA (dsDNA), searches for homology, and then catalyses the exchange of the complementary strand, producing a new heteroduplex. Here we have solved the crystal structures of the Escherichia coli RecA-ssDNA and RecA-heteroduplex filaments. They show that ssDNA and ATP bind to RecA-RecA interfaces cooperatively, explaining the ATP dependency of DNA binding. The ATP gamma-phosphate is sensed across the RecA-RecA interface by two lysine residues that also stimulate ATP hydrolysis, providing a mechanism for DNA release. The DNA is underwound and stretched globally, but locally it adopts a B-DNA-like conformation that restricts the homology search to Watson-Crick-type base pairing. The complementary strand interacts primarily through base pairing, making heteroduplex formation strictly dependent on complementarity. The underwound, stretched filament conformation probably evolved to destabilize the donor duplex, freeing the complementary strand for homology sampling.

For international customers outside the US, please visit the model on our 3D printing service’s international website: LINK

Select the desired material finish and size below. Matte finish applies a UV protective, semi-glossy coating.

Created from PDB ID: 3CMX