SNAP output for PDB entry 2f5o [SNAP web server]

PDB-id

2f5o; SNAP-derived features in text and JSON formats; DNAproDB

Class

hydrolase-DNA

Method

X-ray (2.05 Å)

Summary

Mutm crosslinked to undamaged DNA sampling g:c base pair ic3

Reference

Banerjee A, Santos WL, Verdine GL (2006): "Structure of a DNA glycosylase searching for lesions." Science, 311, 1153-1157. doi: 10.1126/science.1120288.

Abstract

DNA glycosylases must interrogate millions of base pairs of undamaged DNA in order to locate and then excise one damaged nucleobase. The nature of this search process remains poorly understood. Here we report the use of disulfide cross-linking (DXL) technology to obtain structures of a bacterial DNA glycosylase, MutM, interrogating undamaged DNA. These structures, solved to 2.0 angstrom resolution, reveal the nature of the search process: The protein inserts a probe residue into the helical stack and severely buckles the target base pair, which remains intrahelical. MutM therefore actively interrogates the intact DNA helix while searching for damage.