CAPN8 Gene

HGNC Family EF-hand domain containing
Name calpain 8
Description Predicted to enable calcium-dependent cysteine-type endopeptidase activity and identical protein binding activity. Predicted to be involved in proteolysis. Predicted to act upstream of or within calcium-dependent self proteolysis. Predicted to be located in Golgi apparatus. Predicted to be active in cytoplasm. [provided by Alliance of Genome Resources, Mar 2025]
Summary
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In the gastrointestinal tract, CAPN8 is predominantly expressed in the stomach’s surface mucus (pit) cells where it participates in the regulation of membrane trafficking—likely through proteolytic processing of key trafficking proteins—and is an essential component of a “hybrid” protease complex with CAPN9 that preserves gastric mucosal defense; genetic inactivation of CAPN8 (or its proteolytic activity) renders the gastric mucosa more susceptible to injury from external stresses such as ethanol exposure."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n Beyond its gastrointestinal function, polymorphisms in the Capn8 gene have been correlated with variable susceptibility to acetaminophen‐induced liver injury in genetically diverse populations, suggesting a modulatory role of CAPN8 in xenobiotic-induced hepatotoxicity."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n In the context of cancer, although CAPN8 expression in gastric tumors does not appear significantly altered, CAPN8 has emerged as a component of prognostic gene signatures in lung cancers. In lung adenocarcinoma and squamous cell carcinoma, CAPN8 is upregulated and its knockdown diminishes tumor cell proliferative capacity, indicating that it may contribute to tumor cell growth and thus might serve as a potential therapeutic target."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": "\n "}]}, {"type": "t", "text": "\n "}, {"type": "p", "children": [{"type": "t", "text": "\n Moreover, genome‐wide association studies have identified a locus between CAPN2 and CAPN8 that is associated with serum α‐carotene concentrations, linking CAPN8 to metabolic traits that could have broader implications for disease development."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": "\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Shoji Hata, Manabu Abe, Hidenori Suzuki, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Calpain 8/nCL-2 and calpain 9/nCL-4 constitute an active protease complex, G-calpain, involved in gastric mucosal defense."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "PLoS Genet (2010)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1371/journal.pgen.1001040"}], "href": "https://doi.org/10.1371/journal.pgen.1001040"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "20686710"}], "href": "https://pubmed.ncbi.nlm.nih.gov/20686710"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Shoji Hata, Naoko Doi, Fujiko Kitamura, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Stomach-specific calpain, nCL-2/calpain 8, is active without calpain regulatory subunit and oligomerizes through C2-like domains."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2007)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.M703168200"}], "href": "https://doi.org/10.1074/jbc.M703168200"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "17646163"}], "href": "https://pubmed.ncbi.nlm.nih.gov/17646163"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Alison H Harrill, Paul B Watkins, Stephen Su, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Mouse population-guided resequencing reveals that variants in CD44 contribute to acetaminophen-induced liver injury in humans."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Genome Res (2009)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1101/gr.090241.108"}], "href": "https://doi.org/10.1101/gr.090241.108"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "19416960"}], "href": "https://pubmed.ncbi.nlm.nih.gov/19416960"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Jiaqi Liang, Zhencong Chen, Yiwei Huang, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Signatures of malignant cells and novel therapeutic targets revealed by single-cell sequencing in lung adenocarcinoma."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cancer Med (2022)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1002/cam4.4547"}], "href": "https://doi.org/10.1002/cam4.4547"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "35102706"}], "href": "https://pubmed.ncbi.nlm.nih.gov/35102706"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Xiaohan Ma, Huijun Ren, Ruoyu Peng, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Identification of key genes associated with progression and prognosis for lung squamous cell carcinoma."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "PeerJ (2020)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.7717/peerj.9086"}], "href": "https://doi.org/10.7717/peerj.9086"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "32411535"}], "href": "https://pubmed.ncbi.nlm.nih.gov/32411535"}]}, {"type": "r", "ref": 6, "children": [{"type": "t", "text": "Christopher R D'Adamo, Valerie J Dawson, Kathleen A Ryan, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The CAPN2/CAPN8 Locus on Chromosome 1q Is Associated with Variation in Serum Alpha-Carotene Concentrations."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Nutrigenet Nutrigenomics (2016)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1159/000452890"}], "href": "https://doi.org/10.1159/000452890"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "28002826"}], "href": "https://pubmed.ncbi.nlm.nih.gov/28002826"}]}]}]}
Synonyms NCL-2
Proteins CAN8_HUMAN
NCBI Gene ID 388743
API
Download Associations
Predicted Functions View CAPN8's ARCHS4 Predicted Functions.
Co-expressed Genes View CAPN8's ARCHS4 Predicted Functions.
Expression in Tissues and Cell Lines View CAPN8's ARCHS4 Predicted Functions.

Functional Associations

CAPN8 has 3,079 functional associations with biological entities spanning 9 categories (molecular profile, organism, functional term, phrase or reference, chemical, disease, phenotype or trait, structural feature, cell line, cell type or tissue, gene, protein or microRNA, sequence feature) extracted from 84 datasets.

Click the + buttons to view associations for CAPN8 from the datasets below.

If available, associations are ranked by standardized value

Dataset Summary
Allen Brain Atlas Adult Human Brain Tissue Gene Expression Profiles tissues with high or low expression of CAPN8 gene relative to other tissues from the Allen Brain Atlas Adult Human Brain Tissue Gene Expression Profiles dataset.
Allen Brain Atlas Aging Dementia and Traumatic Brain Injury Tissue Sample Gene Expression Profiles tissue samples with high or low expression of CAPN8 gene relative to other tissue samples from the Allen Brain Atlas Aging Dementia and Traumatic Brain Injury Tissue Sample Gene Expression Profiles dataset.
Allen Brain Atlas Prenatal Human Brain Tissue Gene Expression Profiles tissues with high or low expression of CAPN8 gene relative to other tissues from the Allen Brain Atlas Prenatal Human Brain Tissue Gene Expression Profiles dataset.
BioGPS Mouse Cell Type and Tissue Gene Expression Profiles cell types and tissues with high or low expression of CAPN8 gene relative to other cell types and tissues from the BioGPS Mouse Cell Type and Tissue Gene Expression Profiles dataset.
CCLE Cell Line Gene CNV Profiles cell lines with high or low copy number of CAPN8 gene relative to other cell lines from the CCLE Cell Line Gene CNV Profiles dataset.
CCLE Cell Line Gene Expression Profiles cell lines with high or low expression of CAPN8 gene relative to other cell lines from the CCLE Cell Line Gene Expression Profiles dataset.
CellMarker Gene-Cell Type Associations cell types associated with CAPN8 gene from the CellMarker Gene-Cell Type Associations dataset.
ChEA Transcription Factor Binding Site Profiles transcription factor binding site profiles with transcription factor binding evidence at the promoter of CAPN8 gene from the CHEA Transcription Factor Binding Site Profiles dataset.
ChEA Transcription Factor Targets transcription factors binding the promoter of CAPN8 gene in low- or high-throughput transcription factor functional studies from the CHEA Transcription Factor Targets dataset.
ChEA Transcription Factor Targets 2022 transcription factors binding the promoter of CAPN8 gene in low- or high-throughput transcription factor functional studies from the CHEA Transcription Factor Targets 2022 dataset.
COMPARTMENTS Curated Protein Localization Evidence Scores cellular components containing CAPN8 protein from the COMPARTMENTS Curated Protein Localization Evidence Scores dataset.
COMPARTMENTS Text-mining Protein Localization Evidence Scores cellular components co-occuring with CAPN8 protein in abstracts of biomedical publications from the COMPARTMENTS Text-mining Protein Localization Evidence Scores dataset.
COMPARTMENTS Text-mining Protein Localization Evidence Scores 2025 cellular components co-occuring with CAPN8 protein in abstracts of biomedical publications from the COMPARTMENTS Text-mining Protein Localization Evidence Scores 2025 dataset.
COSMIC Cell Line Gene CNV Profiles cell lines with high or low copy number of CAPN8 gene relative to other cell lines from the COSMIC Cell Line Gene CNV Profiles dataset.
COSMIC Cell Line Gene Mutation Profiles cell lines with CAPN8 gene mutations from the COSMIC Cell Line Gene Mutation Profiles dataset.
CTD Gene-Chemical Interactions chemicals interacting with CAPN8 gene/protein from the curated CTD Gene-Chemical Interactions dataset.
DISEASES Text-mining Gene-Disease Association Evidence Scores diseases co-occuring with CAPN8 gene in abstracts of biomedical publications from the DISEASES Text-mining Gene-Disease Assocation Evidence Scores dataset.
DISEASES Text-mining Gene-Disease Association Evidence Scores 2025 diseases co-occuring with CAPN8 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 CAPN8 gene in GWAS and other genetic association datasets from the DisGeNET Gene-Disease Associations dataset.
ENCODE Histone Modification Site Profiles histone modification site profiles with high histone modification abundance at CAPN8 gene from the ENCODE Histone Modification Site Profiles dataset.
ENCODE Transcription Factor Binding Site Profiles transcription factor binding site profiles with transcription factor binding evidence at the promoter of CAPN8 gene from the ENCODE Transcription Factor Binding Site Profiles dataset.
ENCODE Transcription Factor Targets transcription factors binding the promoter of CAPN8 gene in ChIP-seq datasets from the ENCODE Transcription Factor Targets dataset.
ESCAPE Omics Signatures of Genes and Proteins for Stem Cells PubMedIDs of publications reporting gene signatures containing CAPN8 from the ESCAPE Omics Signatures of Genes and Proteins for Stem Cells dataset.
GeneRIF Biological Term Annotations biological terms co-occuring with CAPN8 gene in literature-supported statements describing functions of genes from the GeneRIF Biological Term Annotations dataset.
GeneSigDB Published Gene Signatures PubMedIDs of publications reporting gene signatures containing CAPN8 from the GeneSigDB Published Gene Signatures dataset.
GEO Signatures of Differentially Expressed Genes for Diseases disease perturbations changing expression of CAPN8 gene from the GEO Signatures of Differentially Expressed Genes for Diseases dataset.
GEO Signatures of Differentially Expressed Genes for Gene Perturbations gene perturbations changing expression of CAPN8 gene from the GEO Signatures of Differentially Expressed Genes for Gene Perturbations dataset.
GEO Signatures of Differentially Expressed Genes for Small Molecules small molecule perturbations changing expression of CAPN8 gene from the GEO Signatures of Differentially Expressed Genes for Small Molecules dataset.
GEO Signatures of Differentially Expressed Genes for Transcription Factor Perturbations transcription factor perturbations changing expression of CAPN8 gene from the GEO Signatures of Differentially Expressed Genes for Transcription Factor Perturbations dataset.
GEO Signatures of Differentially Expressed Genes for Viral Infections virus perturbations changing expression of CAPN8 gene from the GEO Signatures of Differentially Expressed Genes for Viral Infections dataset.
GO Biological Process Annotations 2015 biological processes involving CAPN8 gene from the curated GO Biological Process Annotations 2015 dataset.
GO Biological Process Annotations 2023 biological processes involving CAPN8 gene from the curated GO Biological Process Annotations 2023 dataset.
GO Biological Process Annotations 2025 biological processes involving CAPN8 gene from the curated GO Biological Process Annotations2025 dataset.
GO Cellular Component Annotations 2015 cellular components containing CAPN8 protein from the curated GO Cellular Component Annotations 2015 dataset.
GO Molecular Function Annotations 2015 molecular functions performed by CAPN8 gene from the curated GO Molecular Function Annotations 2015 dataset.
GO Molecular Function Annotations 2023 molecular functions performed by CAPN8 gene from the curated GO Molecular Function Annotations 2023 dataset.
GO Molecular Function Annotations 2025 molecular functions performed by CAPN8 gene from the curated GO Molecular Function Annotations 2025 dataset.
GTEx eQTL 2025 SNPs regulating expression of CAPN8 gene from the GTEx eQTL 2025 dataset.
GTEx Tissue Gene Expression Profiles tissues with high or low expression of CAPN8 gene relative to other tissues from the GTEx Tissue Gene Expression Profiles dataset.
GTEx Tissue Gene Expression Profiles 2023 tissues with high or low expression of CAPN8 gene relative to other tissues from the GTEx Tissue Gene Expression Profiles 2023 dataset.
GTEx Tissue Sample Gene Expression Profiles tissue samples with high or low expression of CAPN8 gene relative to other tissue samples from the GTEx Tissue Sample Gene Expression Profiles dataset.
GWAS Catalog SNP-Phenotype Associations 2025 phenotypes associated with CAPN8 gene in GWAS datasets from the GWAS Catalog SNP-Phenotype Associations 2025 dataset.
Heiser et al., PNAS, 2011 Cell Line Gene Expression Profiles cell lines with high or low expression of CAPN8 gene relative to other cell lines from the Heiser et al., PNAS, 2011 Cell Line Gene Expression Profiles dataset.
HMDB Metabolites of Enzymes interacting metabolites for CAPN8 protein from the curated HMDB Metabolites of Enzymes dataset.
HPA Cell Line Gene Expression Profiles cell lines with high or low expression of CAPN8 gene relative to other cell lines from the HPA Cell Line Gene Expression Profiles dataset.
HPA Tissue Gene Expression Profiles tissues with high or low expression of CAPN8 gene relative to other tissues from the HPA Tissue Gene Expression Profiles dataset.
HPA Tissue Protein Expression Profiles tissues with high or low expression of CAPN8 protein relative to other tissues from the HPA Tissue Protein Expression Profiles dataset.
HPA Tissue Sample Gene Expression Profiles tissue samples with high or low expression of CAPN8 gene relative to other tissue samples from the HPA Tissue Sample Gene Expression Profiles dataset.
HPM Cell Type and Tissue Protein Expression Profiles cell types and tissues with high or low expression of CAPN8 protein relative to other cell types and tissues from the HPM Cell Type and Tissue Protein Expression Profiles dataset.
HuBMAP ASCT+B Annotations cell types associated with CAPN8 gene from the HuBMAP ASCT+B dataset.
HuBMAP ASCT+B Augmented with RNA-seq Coexpression cell types associated with CAPN8 gene from the HuBMAP ASCT+B Augmented with RNA-seq Coexpression dataset.
HuBMAP Azimuth Cell Type Annotations cell types associated with CAPN8 gene from the HuBMAP Azimuth Cell Type Annotations dataset.
HuGE Navigator Gene-Phenotype Associations phenotypes associated with CAPN8 gene by text-mining GWAS publications from the HuGE Navigator Gene-Phenotype Associations dataset.
InterPro Predicted Protein Domain Annotations protein domains predicted for CAPN8 protein from the InterPro Predicted Protein Domain Annotations dataset.
JASPAR Predicted Human Transcription Factor Targets 2025 transcription factors regulating expression of CAPN8 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 CAPN8 gene predicted using known transcription factor binding site motifs from the JASPAR Predicted Mouse Transcription Factor Targets 2025 dataset.
JASPAR Predicted Transcription Factor Targets transcription factors regulating expression of CAPN8 gene predicted using known transcription factor binding site motifs from the JASPAR Predicted Transcription Factor Targets dataset.
Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene CNV Profiles cell lines with high or low copy number of CAPN8 gene relative to other cell lines from the Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene CNV Profiles dataset.
Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene Mutation Profiles cell lines with CAPN8 gene mutations from the Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene Mutation Profiles dataset.
KnockTF Gene Expression Profiles with Transcription Factor Perturbations transcription factor perturbations changing expression of CAPN8 gene from the KnockTF Gene Expression Profiles with Transcription Factor Perturbations dataset.
LOCATE Predicted Protein Localization Annotations cellular components predicted to contain CAPN8 protein from the LOCATE Predicted Protein Localization Annotations dataset.
MGI Mouse Phenotype Associations 2023 phenotypes of transgenic mice caused by CAPN8 gene mutations from the MGI Mouse Phenotype Associations 2023 dataset.
MotifMap Predicted Transcription Factor Targets transcription factors regulating expression of CAPN8 gene predicted using known transcription factor binding site motifs from the MotifMap Predicted Transcription Factor Targets dataset.
MoTrPAC Rat Endurance Exercise Training tissue samples with high or low expression of CAPN8 gene relative to other tissue samples from the MoTrPAC Rat Endurance Exercise Training dataset.
MPO Gene-Phenotype Associations phenotypes of transgenic mice caused by CAPN8 gene mutations from the MPO Gene-Phenotype Associations dataset.
PerturbAtlas Signatures of Differentially Expressed Genes for Gene Perturbations gene perturbations changing expression of CAPN8 gene from the PerturbAtlas Signatures of Differentially Expressed Genes for Gene Perturbations dataset.
PerturbAtlas Signatures of Differentially Expressed Genes for Mouse Gene Perturbations gene perturbations changing expression of CAPN8 gene from the PerturbAtlas Signatures of Differentially Expressed Genes for Gene Perturbations dataset.
Reactome Pathways 2024 pathways involving CAPN8 protein from the Reactome Pathways 2024 dataset.
Roadmap Epigenomics Cell and Tissue DNA Methylation Profiles cell types and tissues with high or low DNA methylation of CAPN8 gene relative to other cell types and tissues from the Roadmap Epigenomics Cell and Tissue DNA Methylation Profiles dataset.
Roadmap Epigenomics Cell and Tissue Gene Expression Profiles cell types and tissues with high or low expression of CAPN8 gene relative to other cell types and tissues from the Roadmap Epigenomics Cell and Tissue Gene Expression Profiles dataset.
Roadmap Epigenomics Histone Modification Site Profiles histone modification site profiles with high histone modification abundance at CAPN8 gene from the Roadmap Epigenomics Histone Modification Site Profiles dataset.
RummaGEO Drug Perturbation Signatures drug perturbations changing expression of CAPN8 gene from the RummaGEO Drug Perturbation Signatures dataset.
RummaGEO Gene Perturbation Signatures gene perturbations changing expression of CAPN8 gene from the RummaGEO Gene Perturbation Signatures dataset.
Sci-Plex Drug Perturbation Signatures drug perturbations changing expression of CAPN8 gene from the Sci-Plex Drug Perturbation Signatures dataset.
Tabula Sapiens Gene-Cell Associations cell types with high or low expression of CAPN8 gene relative to other cell types from the Tabula Sapiens Gene-Cell Associations dataset.
Tahoe Therapeutics Tahoe 100M Perturbation Atlas drug perturbations changing expression of CAPN8 gene from the Tahoe Therapeutics Tahoe 100M Perturbation Atlas dataset.
TargetScan Predicted Conserved microRNA Targets microRNAs regulating expression of CAPN8 gene predicted using conserved miRNA seed sequences from the TargetScan Predicted Conserved microRNA Targets dataset.
TargetScan Predicted Nonconserved microRNA Targets microRNAs regulating expression of CAPN8 gene predicted using nonconserved miRNA seed sequences from the TargetScan Predicted Nonconserved microRNA Targets dataset.
TCGA Signatures of Differentially Expressed Genes for Tumors tissue samples with high or low expression of CAPN8 gene relative to other tissue samples from the TCGA Signatures of Differentially Expressed Genes for Tumors dataset.
TISSUES Curated Tissue Protein Expression Evidence Scores tissues with high expression of CAPN8 protein from the TISSUES Curated Tissue Protein Expression Evidence Scores dataset.
TISSUES Curated Tissue Protein Expression Evidence Scores 2025 tissues with high expression of CAPN8 protein from the TISSUES Curated Tissue Protein Expression Evidence Scores 2025 dataset.
TISSUES Experimental Tissue Protein Expression Evidence Scores tissues with high expression of CAPN8 protein in proteomics datasets from the TISSUES Experimental Tissue Protein Expression Evidence Scores dataset.
TISSUES Text-mining Tissue Protein Expression Evidence Scores tissues co-occuring with CAPN8 protein in abstracts of biomedical publications from the TISSUES Text-mining Tissue Protein Expression Evidence Scores dataset.
TISSUES Text-mining Tissue Protein Expression Evidence Scores 2025 tissues co-occuring with CAPN8 protein in abstracts of biomedical publications from the TISSUES Text-mining Tissue Protein Expression Evidence Scores 2025 dataset.