Ask about this productRelated genes to: UBE2A antibody
- Gene:
- UBE2A NIH gene
- Name:
- ubiquitin conjugating enzyme E2 A
- Previous symbol:
- -
- Synonyms:
- UBC2, HHR6A, RAD6A
- Chromosome:
- Xq24
- Locus Type:
- gene with protein product
- Date approved:
- 1992-12-02
- Date modifiied:
- 2016-03-14
Related products to: UBE2A antibody
Related articles to: UBE2A antibody
- Protein ubiquitination regulates diverse cellular processes, and its dysregulation contributes to human disease, including cancer. E2 ubiquitin-conjugating enzymes share a conserved UBC fold in which surface loops fine-tune catalysis and partner interactions, yet the roles of individual loops remain incompletely defined. Here, we identify loop 3-a component of the "backside" β2-β3 hairpin-as a conserved structural and allosteric element in Rad6-family E2s. Structural and bioinformatic analyses of yeast Rad6 and its human homologs (UBE2A/UBE2B) reveal that loop 3 forms an overlapping triple β-turns, with variable first turn and a highly conserved second/third turn that links catalytic regulation to E3 ligase engagement. Systematic mutagenesis of the yeast Rad6 backside β-turn (residues 42-51) shows that this element is required in vivo for Bre1-dependent histone H2B Lys123 monoubiquitination, Rad18-dependent PCNA monoubiquitination, and Ubr1/Ubr2-dependent polyubiquitination and degradation of Sml1 and N-end rule substrates, and related biological processes. Charge-reversal mutations at backside β-turn Glu49 and Asp50 disrupt E3 binding, whereas cancer-relevant substitutions in kink-inducing prolines (Pro43/Pro47) impair mono- and polyubiquitination without abolishing E3 interactions. Certain backside β-turn mutations, including cancer-relevant variants, compromise steady-state levels following DNA damage, revealing them as conditional null or loss-of-function alleles. Nuclear magnetic resonance spectroscopy demonstrates that Pro43/Pro47 mutations induce long-range structural perturbations from backside β-turn into the front-face catalytic pocket, correlating with reduced in vitro ubiquitination activity. Deletion or alanine replacement of the β-turn destabilizes yeast Rad6 and human UBE2A/UBE2B. Together, these findings establish the loop 3/backside β-turn as a critical structural element of Rad6-family enzymes. - Source: PubMed
Shukla Prakash KLeng Andrew MChen Hui-HsuanGanguly RajarshiNewell NicholasChandrasekharan Mahesh B - Aluminum, a ubiquitous environmental neurotoxin, has been implicated in the pathogenesis of neurodegenerative disorders, including Alzheimer's disease (AD). While Aβ deposition is a hallmark of AD progression, the molecular mechanisms underlying aluminum-induced Aβ aggregation remain incompletely understood. This study examines the role of the ciRs-7-miR-7-UBE2A axis in aluminum-induced Aβ deposition. Healthy male SD rats and PC12 cells were stratified into groups based on aluminum maltolate exposure levels to establish an in vivo and in vitro neurotoxicity model. Hippocampal aluminum content, along with the expression levels of ciRs-7, miR-7, UBE2A, and Aβ1-42, were systematically analyzed. The results demonstrated a dose-dependent decrease in ciRs-7 and UBE2A expression with escalating aluminum exposure, accompanied by concurrent upregulation of miR-7 and Aβ1-42 accumulation. Conversely, ciRs-7 overexpression reversed these pathological trends. Mechanistically, aluminum exposure downregulates ciRs-7 in the hippocampus, thereby derepressing miR-7 activity, which suppresses UBE2A expression and ultimately promotes Aβ deposition. These results identify a novel circRNA-dependent mechanism in aluminum neurotoxicity, suggesting therapeutic targets for AD intervention. - Source: PubMed
Publication date: 2025/11/06
Zhang LeiMa YonghaoFang HailunGong YujuanLi ChenyangMeng HuaxingSong JingLu XiaotingZhang HuifangNiu QiaoWang Linping - Endometrial polyps are common, localized overgrowths of endometrial glands and stroma that protrude into the uterine cavity. These tumor-like lesions can cause symptoms like abnormal uterine bleeding and infertility, and they may undergo malignant transformation. The etiology of endometrial polyps remains largely unknown. - Source: PubMed
Publication date: 2025/10/24
Reinikka SiiriMehine Miikavon Nandelstadh PernillaAhvenainen TerhiKhamaiseh SaraNousiainen SusannaJokinen ViljaPasanen AnnukkaBützow RalfSarvilinna NannaPitkänen EsaVahteristo Pia - Despite advances in systemic therapeutic approaches, metastatic colorectal cancer (mCRC) patients harboring BRAF or RAS mutations have poor outcomes. Cancer stem cells (CSCs) play central roles in drug resistance and CRC recurrence. Therefore, targeting the epigenetic mechanisms that sustain CSC properties is a promising therapeutic approach. In this study, we report the efficacy of a treatment strategy with the potential to overcome chemotherapy resistance that involves administering the well-known antiepileptic drug and epigenetic agent valproic acid (VPA) and the standard chemotherapy regimen of oxaliplatin/fluoropyrimidine to wild-type CSCs and CSCs with BRAF and RAS mutations in enriched primary spheroid cultures. Notably, we demonstrated that VPA plus chemotherapy was more effective than other epigenetic drug-chemotherapy combinations by inhibiting cell proliferation and clonogenic growth and by inducing apoptosis and DNA damage. Mechanistically, proteomic analysis demonstrated that VPA induced CSC differentiation through the critical target of VPA, β-Catenin. Indeed, VPA promoted the proteasome-dependent degradation of β-Catenin by enhancing its binding to the E2 ubiquitin-conjugating enzyme UBE2a, leading to marked reductions in nuclear and cytoplasmic β-Catenin levels and subsequently decreasing β-Catenin/TCF-LEF target promoter activation. These effects were confirmed in three in vivo CRC xenograft models, including a syngeneic CT26 immunocompetent mouse model, where VPA combined with oxaliplatin/capecitabine chemotherapy and anti-VEGF therapy, a standard first-line treatment for mCRC, significantly suppressed tumor growth and prolonged survival with minimal toxicity. Proteomic analysis of tumor tissues from in vivo CRC models confirmed the VPA-mediated downregulation of CSC markers and β-Catenin. - Source: PubMed
Publication date: 2025/08/01
Roca Maria SerenaLombardi RitaTesta CristinaIannelli FedericaGrumetti LauraMoccia TaniaBarile VeronicaAddi LauraMemoli DomenicoLeone AlessandraDi Franco SimoneStassi GiorgioAvallone AntonioBruzzese FrancescaPucci BiagioBudillon AlfredoDi Gennaro Elena - This article reports the clinical features and gene mutation types of a large family with Nascimento form of syndromic X-linked intellectual developmental disorder (MRXSN), involving 9 individuals across 3 generations, and a literature review was conducted. In this family, 9 individuals had similar manifestations including mental retardation and unusual facies, and 4 of them had passed away. Genetic testing showed that the proband had the deletion of exons 2-3 of the gene, which was inherited from the mother. Fluorescent quantitative polymerase chain reaction showed that the proband and his uncle had the deletion of exons 2-3 of the gene; the proband's mother, grandmother, and great-aunt had a heterozygous deletion of exons 2-3 of the gene; the proband's father, sister, and aunt had a normal copy number of exons 2-3 of the gene. The 34 patients reported in the literature had diverse clinical phenotypes, and gene mutations (22/34, 65%) and large fragment deletions (12/34, 35%) were the main mutation types. Moderate to severe mental retardation (34/34, 100%), speech and language impairment (33/34, 97%), and unusual facies (32/34, 94%) were the main clinical manifestations of MRXSN patients. The disease has obvious phenotypic heterogeneity, and early diagnosis facilitates optimal prenatal and postnatal management to improve reproductive outcomes. - Source: PubMed
Xu DanXie Jia-YangZhang Xiao-LiWang Meng-YueChu Man-ManHan RuiWang Jun-LingLi Xiao-LiJia Tian-Ming