3W0F

Crystal structure of mouse Endonuclease VIII-LIKE 3 (mNEIL3)

Summary for 3W0F

• Entry DOI: 10.2210/pdb3w0f/pdb
• Descriptor: Endonuclease 8-like 3, ZINC ION, IODIDE ION, ... (4 entities in total)
• Functional Keywords: helix two turns helix, zinc finger, dna binding, hydrolase
• Biological source: Mus musculus (mouse)
• Cellular location: Nucleus: Q8K203
• Total number of polymer chains: 1
• Total formula weight: 32420.91

Authors

Liu, M.,Imamura, K.,Averill, A.M.,Wallace, S.S.,Doublie, S. (deposition date: 2012-10-30, release date: 2013-01-16, Last modification date: 2024-03-20)

Primary citation

Liu, M.,Imamura, K.,Averill, A.M.,Wallace, S.S.,Doublie, S.
Structural Characterization of a Mouse Ortholog of Human NEIL3 with a Marked Preference for Single-Stranded DNA
Structure, 21:247-256, 2013

PubMed Abstract: Endonuclease VIII-like 3 (Neil3) is a DNA glycosylase of the base excision repair pathway that protects cells from oxidative DNA damage by excising a broad spectrum of cytotoxic and mutagenic base lesions. Interestingly, Neil3 exhibits an unusual preference for DNA with single-stranded regions. Here, we report the 2.0 Å crystal structure of a Neil3 enzyme. Although the glycosylase region of mouse Neil3 (MmuNeil3Δ324) exhibits the same overall fold as that of other Fpg/Nei proteins, it presents distinct structural features. First, MmuNeil3Δ324 lacks the αF-β9/10 loop that caps the flipped-out 8-oxoG in bacterial Fpg, which is consistent with its inability to cleave 8-oxoguanine. Second, Neil3 not only lacks two of the three void-filling residues that stabilize the opposite strand, but it also harbors negatively charged residues that create an unfavorable electrostatic environment for the phosphate backbone of that strand. These structural features provide insight into the substrate specificity and marked preference of Neil3 for ssDNA.

PubMed: 23313161
DOI: 10.1016/j.str.2012.12.008

Experimental method

X-RAY DIFFRACTION (2 Å)