| 2003 |
NEIL2 has a unique preference for excising oxidized base lesions from DNA bubble structures (single-stranded/bubble DNA), in contrast to NTH1 and OGG1 which are only active with duplex DNA. NEIL2 shows higher affinity for bubble structures of both damaged and undamaged DNA relative to duplex, suggesting preferential involvement in repair during transcription and/or replication. |
In vitro DNA glycosylase assays with bubble, single-stranded, and duplex DNA substrates containing oxidized bases; affinity binding studies |
The Journal of biological chemistry |
High |
14522990
|
| 2004 |
The transcriptional coactivator p300 stably interacts with and acetylates NEIL2. Lys49 and Lys153 are the major acetylation sites. Acetylation of Lys49 (conserved among Nei orthologs), or its mutation to Arg, inactivates both base excision and AP lyase activities of NEIL2; acetylation of Lys153 has no effect. Reversible acetylation of Lys49 thus regulates NEIL2 repair activity in vivo. |
Co-immunoprecipitation, in vitro acetylation assay with p300, site-directed mutagenesis, in vivo and in vitro activity assays |
Nucleic acids research |
High |
15175427
|
| 2004 |
NEIL2 contains a zinc finger motif with a CHCC (Cys-X2-His-X16-Cys-X2-Cys) motif near its C-terminus. Individual mutations of Cys-291, His-295, Cys-315, and Cys-318 inactivate the enzyme by abolishing DNA binding. H295A and C318S mutants lack bound zinc and show significant secondary structure changes. Arg-310, in the zinc-binding pocket, is critical for activity. The zinc finger motif is essential for NEIL2 structural integrity and enzyme activity. |
ICP mass spectrometry (zinc quantification), site-directed mutagenesis, CD spectra analysis, molecular modeling, in vitro activity assays |
The Journal of biological chemistry |
High |
15339932
|
| 2005 |
NEIL1 and NEIL2 recognize and cleave DNA containing guanidinohydantoin (Gh)/iminoallantoin (Ia) and spiroiminodihydantoin (Sp) lesions (further oxidation products of 8-oxoguanine) via beta- and delta-elimination mechanism. NEIL2 shows little cleavage activity against Sp in duplex DNA but binds and recognizes it (shown by DNA trapping studies). Both enzymes excise Gh/Ia opposite all four natural bases in double-stranded DNA. |
In vitro DNA glycosylase cleavage assays with defined damaged substrates (single-stranded and duplex DNA), DNA trapping studies |
DNA repair |
High |
15533836
|
| 2006 |
NEIL2-initiated repair of 5-hydroxyuracil (5-OHU) requires polynucleotide kinase (PNK) rather than APE1 to remove the 3'-phosphate terminus generated after strand cleavage. NEIL2 stably interacts with BER proteins DNA polymerase beta (Pol beta), DNA ligase IIIalpha (Lig IIIalpha), and XRCC1 (but not APE1). The essential N-terminal segment of NEIL2 mediates these interactions (unlike NEIL1 which uses its C-terminal region). A complex containing NEIL2, PNK, Pol beta, Lig IIIalpha, and XRCC1 can be isolated from human cells and is competent for repair of 5-OHU in plasmid DNA. |
In vitro repair assay with 5-OHU substrate, co-immunoprecipitation from human cells, domain mapping of protein-protein interactions, reconstituted repair assay in plasmid DNA |
DNA repair |
High |
16982218
|
| 2007 |
Y box-binding protein (YB-1) is a stably interacting partner of NEIL2 (identified by mass spectrometry of NEIL2 immunocomplex). YB-1 stimulates NEIL2 base excision activity ~7-fold. YB-1 also interacts with DNA ligase IIIalpha and DNA polymerase beta, forming a large multiprotein complex. YB-1 normally cytoplasmic translocates to the nucleus during UVA-induced oxidative stress, concomitantly increasing its association with and activation of NEIL2. NEIL2-initiated base excision activity is significantly reduced in YB-1-depleted cells. |
Mass spectrometry of NEIL2 immunocomplex, co-immunoprecipitation, in vitro stimulation assay, YB-1 siRNA knockdown, nuclear/cytoplasmic fractionation, UVA treatment |
The Journal of biological chemistry |
High |
17686777
|
| 2006 |
Recombinant NEIL2 purified from E. coli has biochemically characterized DNA glycosylase/AP lyase activity with unique preference for bubble or single-stranded DNA substrates over duplex DNA, unlike NTH1 and OGG1. NEIL2 and NEIL1 are distinct mammalian orthologs of E. coli Nei and Fpg in reaction mechanism. |
Purification of recombinant protein from E. coli, in vitro DNA glycosylase assays with bubble, single-stranded, and duplex DNA substrates |
Methods in enzymology |
High |
16793361
|
| 2005 |
Murine NEIL2 (mNEIL2) associates with microtubules in situ and in vitro. Purified recombinant mNEIL2 co-precipitates with microtubules and associates with the microtubule network during interphase and with the spindle assembly at mitosis, as shown by in situ localization, microtubule co-precipitation, and site-directed photochemical experiments. |
In situ localization with fluorochrome-conjugated recombinant protein, microtubule co-precipitation, site-directed photochemical crosslinking |
DNA repair |
Medium |
15725623
|
| 2010 |
Pyridoxal-5'-phosphate (PLP) inhibits NEIL2 specifically among six bifunctional DNA repair glycosylases tested. Inhibition is through Schiff base formation between PLP and Lys50 of NEIL2, abolishing DNA binding. The beta2/beta3 loop where Lys50 is located is important for DNA binding and likely lies next to a phosphate-binding site. |
Enzyme inhibition assay, LC/nanoESI-MS/MS identification of modified residue, DNA binding assay |
Biochemical and biophysical research communications |
Medium |
20175991
|
| 2011 |
NEIL2 is present in purified human mitochondrial extracts and co-localizes with the mitochondrion-specific protein MT-CO2 by confocal microscopy. ChIP analysis shows NEIL2 associates with mitochondrial genes MT-CO2 and MT-CO3, and with mitochondrial DNA polymerase gamma. Individual depletion of NEIL2 in HEK293 cells causes increased levels of oxidized bases in the mitochondrial genome, demonstrating NEIL2's role in mitochondrial genome maintenance. |
Mitochondrial extract purification, confocal microscopy, chromatin immunoprecipitation, proximity ligation assay, NEIL2 siRNA knockdown with mt-DNA damage quantification |
The Journal of biological chemistry |
High |
22130663
|
| 2012 |
Depletion of NEIL2 causes a 6-7-fold increase in spontaneous mutation frequency in the HPRT gene. The NEIL2 variant R257L has modestly decreased DNA glycosylase activity, but shows ~5-fold decreased repair in reconstituted BER assays due to lower affinity for Pol beta and other repair proteins. Cells expressing R257L show increased endogenous DNA damage relative to WT. |
siRNA depletion with HPRT mutation assay, reconstituted BER assay, biochemical characterization of variant proteins, protein-protein interaction assays |
DNA repair |
High |
22497777
|
| 2014 |
Cockayne Syndrome B (CSB) protein physically interacts with NEIL2 independently of DNA. CSB stimulates NEIL2 glycosylase activity on 5-hydroxyuracil lesion in a DNA bubble substrate and also stimulates a novel NEIL2 activity toward 4,6-diamino-5-formamidopyrimidine (FapyA). Immunofluorescence shows increased cytoplasmic co-localization of CSB and NEIL2 after oxidative stress. Stalling transcription with alpha-amanitin increases CSB-NEIL2 co-localization. CSB knockdown reduces NEIL2-dependent incision activity in whole cell extracts. |
Co-immunoprecipitation with recombinant proteins and cell extracts (DNA-independent), in vitro stimulation assay, immunofluorescence, transcription stalling with alpha-amanitin, siRNA knockdown with activity readout |
Mechanisms of ageing and development |
High |
24406253
|
| 2015 |
Neil2-null mice accumulate oxidized DNA bases preferentially in transcriptionally active (transcribed) genomic sequences. In vivo immunopulldown from mouse tissue shows NEIL2 associates with RNA polymerase II, Cockayne syndrome group B protein (CSB), and TFIIH. ChIP from mouse tissue demonstrates co-occupancy of NEIL2 and RNA Pol II exclusively on transcribed genes. Neil2-null mouse embryonic fibroblasts show increased telomere loss and genomic instability. Neil2-null mice are more responsive to inflammatory agents, producing higher levels of inflammatory genes. |
Neil2-null mouse generation, co-immunoprecipitation from mouse tissue, ChIP from mouse tissue, LA-QPCR for oxidative DNA damage in transcribed regions, telomere FISH |
The Journal of biological chemistry |
High |
26245904
|
| 2019 |
Depletion of NEIL1 and NEIL2 in Xenopus embryos and differentiating mouse ESCs causes a defect in cranial neural crest cell (cNCC) development via oxidative stress-induced TP53-dependent DNA damage response. Neil-deficiency causes oxidative damage specifically to mitochondrial DNA, triggering TP53-mediated intrinsic apoptosis. Epistasis with Tdg-deficient mESCs shows the cNCC defect is NOT due to impaired epigenetic DNA demethylation. |
Xenopus embryo knockdown, mouse ESC differentiation with NEIL KO, epistasis experiments with Tdg KO, TP53 inhibitor rescue, mitochondrial DNA damage assays |
eLife |
High |
31566562
|
| 2020 |
Crystal structure of mammalian NEIL2 (opossum Monodelphis domestica) reveals an unusual 'open' conformation not seen in NEIL1 or NEIL3. Combined crystallographic and solution-scattering (SAXS) studies show NEIL2 is conformationally dynamic, predicted to adopt a 'closed' conformation upon substrate binding. Three cancer variants (S140N, G230W, G303R) were biochemically characterized. |
X-ray crystallography (crystal structure), small-angle X-ray scattering (SAXS), biochemical characterization of cancer variants |
Structure |
High |
32846144
|
| 2021 |
NEIL2 has a non-canonical function as a direct suppressor of NF-κB signaling. NEIL2 directly interacts with the Rel homology region of RelA (p65), blocking NF-κB binding to target gene promoters and repressing proinflammatory gene expression (Cxcl1, Cxcl2, Cxcl10, Il6, Tnfa). Neil2-null mice show significantly higher expression of proinflammatory genes. Intrapulmonary delivery of purified recombinant NEIL2 decreases NF-κB-DNA binding and reduces proinflammatory gene expression and neutrophil recruitment. |
Co-immunoprecipitation, ChIP, electrophoretic mobility shift assay (EMSA), Neil2-null mouse model, intrapulmonary administration of recombinant NEIL2 protein |
The Journal of biological chemistry |
High |
33932404
|
| 2021 |
NEIL2 conformation in solution is predominantly 'open'; its large N-terminal insert (absent from other DNA glycosylases) is unstructured in solution. HDX-MS combined with homology modeling and MD simulations shows NEIL2 is a conformationally flexible protein, consistent with its role in repair of non-canonical DNA structures and protein-protein interactions. |
Hydrogen/deuterium exchange mass spectrometry (HDX-MS), homology modeling, molecular dynamics simulations |
Journal of molecular biology |
Medium |
34757057
|
| 2021 |
In cells depleted of OGG1 or treated with OGG1 inhibitor TH5487, NEIL2 accumulation at DNA damage sites is prolonged and NEIL2 retention at damaged chromatin is increased. NEIL2-depleted cells oxidatively stressed with OGG1 also inhibited show excessive genomic 8-oxoG accumulation, indicating NEIL2 serves as a backup BER enzyme for OGG1. |
Live cell imaging of NEIL2 recruitment kinetics, chromatin fractionation, siRNA depletion, pharmacological OGG1 inhibition, immunofluorescence for 8-oxoG |
International journal of molecular sciences |
Medium |
33925271
|
| 2022 |
NEIL2 polymorphic variant P304T (Pro304 in the beta-turn of the zinc finger motif) has ~5-fold reduced catalytic efficiency (kcat/KM) compared to wild-type, lower DNA affinity, and reduced proficiency in removing damaged bases from single-stranded and bubble-containing DNA. R103W variant is much less affected. |
Biochemical characterization of recombinant variant proteins, steady-state kinetics, DNA binding assays |
International journal of molecular sciences |
Medium |
35216329
|
| 2023 |
NEIL2 directly binds to the 5'-UTR of SARS-CoV-2 genomic RNA and blocks viral protein synthesis. Delivery of recombinant NEIL2 into ACE2-expressing cells decreases expression of proinflammatory genes, viral E-gene expression, and lowers yield of viral progeny. |
RNA binding assay (NEIL2 binding to 5'-UTR of viral RNA), recombinant NEIL2 delivery into cells, measurement of viral replication and proinflammatory gene expression |
Nature communications |
Medium |
38071370
|
| 2023 |
Crystal structure of mammalian NEIL2 in complex with an abasic site analog-containing DNA duplex at 2.08 Å reveals a large interdomain conformational shift upon DNA binding compared to the unliganded structure, with local changes in C-terminal zinc finger and N-terminal void-filling loop required to position the enzyme on DNA. Biochemical analysis shows NEIL2 has a significant preference for its lyase activity, particularly relevant for abasic sites. Detailed substrate range characterization confirms preference for oxidized cytosine products and abasic sites. |
X-ray crystallography (liganded structure at 2.08 Å), comparison with unliganded structure, biochemical assays with array of oxidized base lesions |
Nucleic acids research |
High |
37971311
|
| 2023 |
NEIL2 is phosphorylated by CDK5 and PKC in vitro and in SH-SY5Y neuroblastoma cells. Phosphorylation by PKC causes a substantial reduction in NEIL2 repair activity. CDK5 phosphorylation does not directly alter enzymatic activity. NEIL2 undergoes rapid dephosphorylation in response to oxidative stress in SH-SY5Y cells, indicating phosphorylation is an important modulator of NEIL2 function during oxidative stress. |
In vitro kinase assays with CDK5 and PKC, in vivo phosphorylation in SH-SY5Y cells, DNA repair activity assay after phosphorylation, oxidative stress treatment with phosphorylation status monitoring |
Antioxidants |
Medium |
36829914
|
| 2019 |
Sirt3 deacetylates NEIL2 (along with NEIL1, OGG1, MUTYH, APE1, and LIG3) in colorectal cancer cells, modulating mitochondrial BER activity; NEIL2 is identified as a substrate for Sirt3-mediated deacetylation. |
Deacetylation assay with Sirt3 and NEIL2 as substrate |
Polski przeglad chirurgiczny |
Low |
32312920
|