| Name | mitochondrial calcium uniporter dominant negative subunit beta |
| Description | Enables calcium channel inhibitor activity. Involved in negative regulation of calcium import into the mitochondrion. Located in mitochondrial inner membrane and nucleoplasm. Part of uniplex complex. [provided by Alliance of Genome Resources, Mar 2025] |
| Summary |
{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nThe mitochondrial calcium uniporter (mtCU) complex is a highly selective channel responsible for Ca²⁺ uptake into the mitochondrial matrix, and its function depends on the proper assembly of several components. In one study, affinity purification and quantitative mass spectrometry of the uniplex revealed that MCU and its paralog, MCUb (MCUB), coexist with regulatory proteins such as MICU1, MICU2, and the essential regulator EMRE. The identification of MCUb alongside the pore-forming MCU subunit highlights a potential regulatory layer in the channel complex, suggesting that distinct paralogs may contribute uniquely to channel assembly and functional modulation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nA subsequent investigation focused specifically on MCUB demonstrated its importance in modulating mtCU activity within cardiac physiology. As a paralog of MCU, MCUB plays a critical role in regulating mitochondrial Ca²⁺ uptake, possibly by acting as a dominant-negative subunit within the channel complex. This modulation of Ca²⁺ influx is vital for maintaining mitochondrial and cardiac homeostasis, underscoring a physiological function for MCUB in fine-tuning the uniporter’s activity to match the energetic and signaling demands of the heart."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Yasemin Sancak, Andrew L Markhard, Toshimori Kitami, et al. "}, {"type": "b", "children": [{"type": "t", "text": "EMRE is an essential component of the mitochondrial calcium uniporter complex."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Science (2013)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1126/science.1242993"}], "href": "https://doi.org/10.1126/science.1242993"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "24231807"}], "href": "https://pubmed.ncbi.nlm.nih.gov/24231807"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Jonathan P Lambert, Timothy S Luongo, Dhanendra Tomar, et al. "}, {"type": "b", "children": [{"type": "t", "text": "MCUB Regulates the Molecular Composition of the Mitochondrial Calcium Uniporter Channel to Limit Mitochondrial Calcium Overload During Stress."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Circulation (2019)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1161/CIRCULATIONAHA.118.037968"}], "href": "https://doi.org/10.1161/CIRCULATIONAHA.118.037968"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "31533452"}], "href": "https://pubmed.ncbi.nlm.nih.gov/31533452"}]}]}]}
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| NCBI Gene ID | 55013 |
| API | |
| Download Associations | |
| Predicted Functions |
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| Co-expressed Genes |
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| Expression in Tissues and Cell Lines |
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MCUB has 2,574 functional associations with biological entities spanning 5 categories (chemical, functional term, phrase or reference, disease, phenotype or trait, cell line, cell type or tissue, gene, protein or microRNA) extracted from 46 datasets.
Click the + buttons to view associations for MCUB from the datasets below.
If available, associations are ranked by standardized value
| Dataset | Summary | |
|---|---|---|
| Allen Brain Atlas Aging Dementia and Traumatic Brain Injury Tissue Sample Gene Expression Profiles | tissue samples with high or low expression of MCUB gene relative to other tissue samples from the Allen Brain Atlas Aging Dementia and Traumatic Brain Injury Tissue Sample Gene Expression Profiles dataset. | |
| Carcinogenome Chemical Perturbation Carcinogenicity Signatures | small molecule perturbations changing expression of MCUB gene from the Carcinogenome Chemical Perturbation Carcinogenicity Signatures dataset. | |
| CCLE Cell Line Proteomics | Cell lines associated with MCUB protein from the CCLE Cell Line Proteomics dataset. | |
| CellMarker Gene-Cell Type Associations | cell types associated with MCUB gene from the CellMarker Gene-Cell Type Associations dataset. | |
| ChEA Transcription Factor Targets 2022 | transcription factors binding the promoter of MCUB gene in low- or high-throughput transcription factor functional studies from the CHEA Transcription Factor Targets 2022 dataset. | |
| CM4AI KOLF21J CRISPRi Gene Perturbation Atlas | gene perturbations changing expression of MCUB gene from the CM4AI KOLF21J CRISPRi Gene Perturbation Atlas dataset. | |
| COMPARTMENTS Curated Protein Localization Evidence Scores 2025 | cellular components containing MCUB protein from the COMPARTMENTS Curated Protein Localization Evidence Scores 2025 dataset. | |
| COMPARTMENTS Text-mining Protein Localization Evidence Scores 2025 | cellular components co-occuring with MCUB protein in abstracts of biomedical publications from the COMPARTMENTS Text-mining Protein Localization Evidence Scores 2025 dataset. | |
| DeepCoverMOA Drug Mechanisms of Action | small molecule perturbations with high or low expression of MCUB protein relative to other small molecule perturbations from the DeepCoverMOA Drug Mechanisms of Action dataset. | |
| DepMap CRISPR Gene Dependency | cell lines with fitness changed by MCUB gene knockdown relative to other cell lines from the DepMap CRISPR Gene Dependency dataset. | |
| DISEASES Experimental Gene-Disease Association Evidence Scores 2025 | diseases associated with MCUB gene in GWAS datasets from the DISEASES Experimental Gene-Disease Assocation Evidence Scores 2025 dataset. | |
| DISEASES Text-mining Gene-Disease Association Evidence Scores 2025 | diseases co-occuring with MCUB gene in abstracts of biomedical publications from the DISEASES Text-mining Gene-Disease Assocation Evidence Scores 2025 dataset. | |
| DisGeNET Gene-Disease Associations | diseases associated with MCUB gene in GWAS and other genetic association datasets from the DisGeNET Gene-Disease Associations dataset. | |
| DisGeNET Gene-Phenotype Associations | phenotypes associated with MCUB gene in GWAS and other genetic association datasets from the DisGeNET Gene-Phenoptype Associations dataset. | |
| GO Biological Process Annotations 2023 | biological processes involving MCUB gene from the curated GO Biological Process Annotations 2023 dataset. | |
| GO Biological Process Annotations 2025 | biological processes involving MCUB gene from the curated GO Biological Process Annotations2025 dataset. | |
| GO Cellular Component Annotations 2023 | cellular components containing MCUB protein from the curated GO Cellular Component Annotations 2023 dataset. | |
| GO Cellular Component Annotations 2025 | cellular components containing MCUB protein from the curated GO Cellular Component Annotations 2025 dataset. | |
| GO Molecular Function Annotations 2023 | molecular functions performed by MCUB gene from the curated GO Molecular Function Annotations 2023 dataset. | |
| GO Molecular Function Annotations 2025 | molecular functions performed by MCUB gene from the curated GO Molecular Function Annotations 2025 dataset. | |
| GTEx Tissue Gene Expression Profiles 2023 | tissues with high or low expression of MCUB gene relative to other tissues from the GTEx Tissue Gene Expression Profiles 2023 dataset. | |
| GWAS Catalog SNP-Phenotype Associations 2025 | phenotypes associated with MCUB gene in GWAS datasets from the GWAS Catalog SNP-Phenotype Associations 2025 dataset. | |
| HuBMAP ASCT+B Annotations | cell types associated with MCUB gene from the HuBMAP ASCT+B dataset. | |
| HuBMAP ASCT+B Augmented with RNA-seq Coexpression | cell types associated with MCUB gene from the HuBMAP ASCT+B Augmented with RNA-seq Coexpression dataset. | |
| HuBMAP Azimuth Cell Type Annotations | cell types associated with MCUB gene from the HuBMAP Azimuth Cell Type Annotations dataset. | |
| IMPC Knockout Mouse Phenotypes | phenotypes of mice caused by MCUB gene knockout from the IMPC Knockout Mouse Phenotypes dataset. | |
| JASPAR Predicted Human Transcription Factor Targets 2025 | transcription factors regulating expression of MCUB gene predicted using known transcription factor binding site motifs from the JASPAR Predicted Human Transcription Factor Targets dataset. | |
| JASPAR Predicted Mouse Transcription Factor Targets 2025 | transcription factors regulating expression of MCUB gene predicted using known transcription factor binding site motifs from the JASPAR Predicted Mouse Transcription Factor Targets 2025 dataset. | |
| LINCS L1000 CMAP Chemical Perturbation Consensus Signatures | small molecule perturbations changing expression of MCUB gene from the LINCS L1000 CMAP Chemical Perturbations Consensus Signatures dataset. | |
| LINCS L1000 CMAP CRISPR Knockout Consensus Signatures | gene perturbations changing expression of MCUB gene from the LINCS L1000 CMAP CRISPR Knockout Consensus Signatures dataset. | |
| MGI Mouse Phenotype Associations 2023 | phenotypes of transgenic mice caused by MCUB gene mutations from the MGI Mouse Phenotype Associations 2023 dataset. | |
| NIBR DRUG-seq U2OS MoA Box Gene Expression Profiles | drug perturbations changing expression of MCUB gene from the NIBR DRUG-seq U2OS MoA Box dataset. | |
| PFOCR Pathway Figure Associations 2023 | pathways involving MCUB protein from the PFOCR Pathway Figure Associations 2023 dataset. | |
| PFOCR Pathway Figure Associations 2024 | pathways involving MCUB protein from the Wikipathways PFOCR 2024 dataset. | |
| Reactome Pathways 2024 | pathways involving MCUB protein from the Reactome Pathways 2024 dataset. | |
| Replogle et al., Cell, 2022 K562 Essential Perturb-seq Gene Perturbation Signatures | gene perturbations changing expression of MCUB gene from the Replogle et al., Cell, 2022 K562 Essential Perturb-seq Gene Perturbation Signatures dataset. | |
| Replogle et al., Cell, 2022 K562 Genome-wide Perturb-seq Gene Perturbation Signatures | gene perturbations changing expression of MCUB gene from the Replogle et al., Cell, 2022 K562 Genome-wide Perturb-seq Gene Perturbation Signatures dataset. | |
| Rummagene Transcription Factor Associations 2026 | transcription factors regulating expression of MCUB gene from the Rummagene Transcription Factor Associations 2026 dataset. | |
| RummaGEO Drug Perturbation Signatures | drug perturbations changing expression of MCUB gene from the RummaGEO Drug Perturbation Signatures dataset. | |
| RummaGEO Gene Perturbation Signatures | gene perturbations changing expression of MCUB gene from the RummaGEO Gene Perturbation Signatures dataset. | |
| Sci-Plex Drug Perturbation Signatures | drug perturbations changing expression of MCUB gene from the Sci-Plex Drug Perturbation Signatures dataset. | |
| Tahoe Therapeutics Tahoe 100M Perturbation Atlas | drug perturbations changing expression of MCUB gene from the Tahoe Therapeutics Tahoe 100M Perturbation Atlas dataset. | |
| TISSUES Curated Tissue Protein Expression Evidence Scores 2025 | tissues with high expression of MCUB protein from the TISSUES Curated Tissue Protein Expression Evidence Scores 2025 dataset. | |
| TISSUES Experimental Tissue Protein Expression Evidence Scores 2025 | tissues with high expression of MCUB protein in proteomics datasets from the TISSUES Experimental Tissue Protein Expression Evidence Scores 2025 dataset. | |
| TISSUES Text-mining Tissue Protein Expression Evidence Scores 2025 | tissues co-occuring with MCUB protein in abstracts of biomedical publications from the TISSUES Text-mining Tissue Protein Expression Evidence Scores 2025 dataset. | |
| WikiPathways Pathways 2024 | pathways involving MCUB protein from the WikiPathways Pathways 2024 dataset. | |