Solid state NMR chemical shift assignment of the non-structural single-stranded DNA binding protein gVp from fd bacteriophage.

The non-structural gene V protein (pV, gVp) from fd virus is a non-specific single-stranded DNA binding protein. The role of gVp is to sequester the single-stranded DNA thus reducing the generation of the replicative DNA form and leading to the formation of progeny phage. In this study, we assigned the C and N resonances of the crystalline unbound protein by magic-angle spinning solid-state NMR. The secondary structure predicted by the NMR shifts is in excellent agreement with the X-ray structure of the same 87-residue protein.