| 2005 |
NSE3 (Nse3) is a subunit of the Smc5-6 complex and forms a subcomplex with Nse1 and Nse4 (Nse1-Nse3-Rad62 in S. pombe). The Nse2 SUMO ligase sumoylates Nse3 in vitro in an Nse2-dependent manner. |
Biochemical purification of Smc5-6 complex from S. pombe; in vitro sumoylation assay |
Molecular and cellular biology |
High |
15601840 15601841
|
| 2004 |
NSE3 (Nse3) is an essential nuclear protein required for normal mitotic chromosome segregation, DNA damage resistance, and meiosis. Epistasis with Rhp51 (Rad51) places Nse3 in the homologous recombination repair pathway. |
Genetic screen, biochemical co-purification, epistasis analysis with rhp51 mutants, sensitivity assays to genotoxic agents |
Molecular biology of the cell |
High |
15331764
|
| 2005 |
NSE3 is a component of the Nse1-Nse3-Nse4 subcomplex within the Smc5-6 complex. This subcomplex also bridges the head domains of Smc5 and Smc6. |
Biochemical purification of Smc5-6 from S. pombe, identification of subcomplexes by interaction mapping |
Molecular and cellular biology |
High |
15601840
|
| 2006 |
NSE3, as part of the Nse1-Nse3-Nse4 subcomplex, bridges the head domains of Smc5 and Smc6 in addition to the kleisin Nse4. The Nse1-Nse3-Nse4 and Nse5-Nse6 subcomplexes bind to the Smc5-Smc6 heads at different sites. |
In vitro protein interaction assays, structural predictions, domain mapping |
The Journal of biological chemistry |
Medium |
17005570
|
| 2007 |
The human NSMCE3/MAGEG1 protein is a bona fide component of the human SMC5-6 complex. Depletion of NSMCE3 leads to degradation of the other SMC5-6 subunits and sensitivity to methyl methanesulfonate. NSMCE3 is modified by sumoylation and ubiquitination. |
Co-immunoprecipitation, siRNA depletion, sensitivity assays, detection of post-translational modifications |
Molecular and cellular biology |
High |
18086888
|
| 2003 |
MAGE-G1 (NSMCE3 ortholog/alias) interacts with the transcription factor E2F1 via its transactivation domain, represses E2F1-dependent transcription, and antagonizes E2F1-induced apoptosis. MAGE-G1 also interacts with the p75 neurotrophin receptor. |
Co-immunoprecipitation, colony formation assay, BrdU incorporation, transcriptional reporter assay in N1E-115 cells |
The Journal of biological chemistry |
Medium |
14593116
|
| 2011 |
A conserved hydrophobic surface on the C-terminal (WH/B) domain of NSE3/MAGEG1 mediates interaction with NSE4, and N-terminal (WH/A) domain residues are essential for interaction with NSE1. These interactions are conserved in human orthologs. MAGEG1 interaction with NSE4b results in transcriptional co-activation of the nuclear receptor SF1. |
Site-directed mutagenesis, yeast two-hybrid, Co-IP, molecular modelling, transcriptional reporter assay |
PloS one |
High |
21364888
|
| 2015 |
NSE3, as part of the NSE1/NSE3/NSE4 subcomplex, binds double-stranded DNA without sequence preference. Mutations of key basic residues in the NSE3 DNA-binding surface reduce DNA binding in vitro and cause cell death or hypersensitivity to DNA-damaging agents in vivo. A hypomorphic nse3 DNA-binding mutant shows reduced association of SMC5/6 with chromatin by ChIP. |
In vitro DNA binding assays, site-directed mutagenesis, S. pombe genome integration of mutants, chromatin immunoprecipitation (ChIP) |
Nucleic acids research |
High |
26446992
|
| 2015 |
NSE3 is structurally related to KITE (kleisin interacting tandem winged-helix elements) proteins and forms a heterodimer via its N-terminal WH domain, associating with the central part of the NSE4 kleisin subunit. In placental mammals, NSE3 gave rise to >60 MAGE-related KITE proteins. |
Structural similarity analysis, evolutionary bioinformatics, cross-species comparison |
Structure |
Medium |
26585514
|
| 2016 |
Biallelic missense mutations in NSMCE3 disrupt interactions within the SMC5/6 complex, leading to destabilization of the complex. Patient cells show chromosome rearrangements, micronuclei, sensitivity to replication stress and DNA damage, and defective homologous recombination, causing a chromosome breakage syndrome with T and B cell immunodeficiency. |
Whole exome sequencing, Co-IP to test interaction disruption, cytogenetics, cell survival assays, HR assay in patient-derived cells |
The Journal of clinical investigation |
High |
27427983
|
| 2016 |
NSE3 (Nse3 in S. cerevisiae) is required for Smc5/6 localization to telomeres. The temperature-sensitive nse3-1 mutant is defective in Smc5/6 telomere association, leading to defects in telomere clustering, Sir4 dispersion, and loss of transcriptional repression of sub-telomeric genes and TERRA. Nse3 physically interacts with the Rap1-binding factors Rif2 and Sir4. |
ChIP, co-immunoprecipitation, genetic interaction analysis, telomere length measurement |
PLoS genetics |
Medium |
27564449
|
| 2012 |
A conserved Nse3/MAGE-binding domain (NMBD) within Nse4/EID proteins mediates binding to NSE3/MAGE proteins. The central helical region of NSE4/EID binds into the conserved hydrophobic pocket of MAGE proteins, with structure modeling supporting this interaction mode. |
Site-directed mutagenesis, yeast two-hybrid, PEPSCAN ELISA, molecular docking/dynamics simulation |
PloS one |
Medium |
22536443
|
| 2022 |
Cryo-EM structure of DNA-bound Smc5/6 (including Nse1-3-4 subcomplex) at 3.8 Å shows NSE3 secures the DNA double helix from above within a clamp structure. NSE3 contributes positively charged residues to the DNA-binding inner surface. Mutational data confirm distinct DNA-binding contributions of NSE3 to chromatin association and cell fitness. |
Cryo-EM structure determination, crosslinking mass spectrometry, in vivo mutational analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
35648833
|
| 2021 |
Crystal structure of Xenopus laevis Nse1-Nse3-Nse4 subcomplex at 1.7 Å resolution shows Nse1-Nse3 dimer adopts a closed conformation forming three interfaces with Nse4, forcing Nse4 into a Z-shaped conformation. Disease-causing NSMCE3 mutations (lung disease/immunodeficiency syndrome) could dislodge Nse4 from the Nse1-Nse3 complex based on structural analysis. |
X-ray crystallography at 1.7 Å, DNA binding assays, mutational analysis |
Journal of molecular biology |
High |
33676928
|
| 2021 |
NSE3 double-stranded DNA binding activity is critical for stable chromatin association of Smc5/6 in live cells. Disrupting Nse3 dsDNA binding reduces chromatin association, whereas disrupting ssDNA binding at the hinge does not prevent chromatin association but leads to elevated gross chromosomal rearrangements during replication restart. |
Single-molecule tracking in live fission yeast, defined point mutants in nse3 |
eLife |
High |
33860765
|
| 2020 |
NSE3 depletion increases HPV-31 viral replication and transcription in keratinocytes maintaining episomal HPV-31, demonstrating that SMC5/6 (including NSE3) represses the HPV-31 replicative program. |
siRNA depletion of NSE3, viral replication and transcription assays, Co-IP |
Pathogens |
Medium |
32992873
|
| 2020 |
The human NSE1-NSE3 heterodimer and NSE1-NSE3-NSE4 subcomplex architecture was determined by crosslinking-MS. NSE3 (hNSE3/MAGEG1) is positioned near the SMC head domains in the rod-like Smc5/6 complex. |
Crosslinking mass spectrometry, electron microscopy |
Journal of molecular biology |
Medium |
32389690
|
| 2022 |
NSE3 (Nse3) stimulates the ubiquitin E3 ligase activity of NSE1 within the Smc5/6 complex. The Nse1 ligase activity is stimulated by Nse3 and Nse4 together using purified S. pombe proteins. |
In vitro ubiquitination assay with purified proteins, Nse1/Nse3/Nse4 combinations |
Cells |
Medium |
35011726
|
| 2017 |
MAGE-G1 (NSMCE3) interacts with FSCN1 (fascin) and vimentin (VIME) during retinoic acid-induced neuronal differentiation of P19 cells, validated by GST pulldown and Co-IP. |
SILAC-based quantitative proteomics, GST pulldown, co-immunoprecipitation |
Scientific reports |
Low |
28374796
|
| 2016 |
Crystal structures of MAGE-A3 and MAGE-A4 reveal a terminal peptide bound in a deep cleft between two tandem-arranged winged helix domains. Comparison with an effector-bound MAGE-G1 structure suggests a major conformational rearrangement is required for binding, implying allosteric regulation of effector binding in MAGE-G1/NSMCE3. |
X-ray crystallography of MAGE-A3 and MAGE-A4; structural comparison with MAGE-G1 |
PloS one |
Low |
26910052
|
| 2023 |
C. elegans MAGE-1 (NSE3 ortholog) directly interacts with NSE-1 and NSE-4. Loss of mage-1/nse-3 reduces NSE-1 protein levels and causes NSE-1 mislocalization from nucleus to cytoplasm, indicating MAGE-1/NSE3 is essential for NSE-1 stability and proper SMC-5/6 complex function. |
Co-immunoprecipitation, GFP-tagged localization studies, genetic knockouts in C. elegans |
Genetics |
Medium |
37579186
|
| 2025 |
The HBx-DDB1 complex directly and simultaneously interacts with NSE3, a component of the SMC5/6 complex, as revealed by cryo-EM structure and biochemical analysis. |
Cryo-EM structure of HBx-DDB1 complex; biochemical interaction analysis |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
40512786
|
| 2026 |
The NSMCE1/NSMCE3 subcomplex is sufficient to inhibit HBV transcription in vitro and in cell-based assays. NSMCE1/3 promotes degradation of HBx via a ubiquitin-independent proteasomal mechanism; NSMCE1/3 interacts with the 20S proteasome but does not stimulate HBx ubiquitination. Knockdown of NSMCE3 promotes HBV proliferation. |
Cell-free transcription assay with purified proteins, RT-PCR, cycloheximide chase, proteasome inhibitor experiments, ubiquitination assay, Co-IP with 20S proteasome, siRNA knockdown |
International journal of biological macromolecules |
Medium |
41825673
|