BAG family molecular chaperone regulator 4 is a protein that in humans is encoded by the BAG4 gene.^[5][6][7]

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BAG4
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 1M62, 1M7K
Identifiers
Aliases	BAG4, BAG-4, SODD, BCL2 associated athanogene 4, BAG cochaperone 4
External IDs	OMIM: 603884; MGI: 1914634; HomoloGene: 31270; GeneCards: BAG4; OMA:BAG4 - orthologs
Gene location (Human) Chr. Chromosome 8 (human)[1] Band 8p11.23 Start 38,176,533 bp[1] End 38,213,301 bp[1]
Gene location (Mouse) Chr. Chromosome 8 (mouse)[2] Band 8|8 A2 Start 26,254,566 bp[2] End 26,275,315 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in Brodmann area 23 postcentral gyrus germinal epithelium pons entorhinal cortex superior frontal gyrus cerebellar vermis middle temporal gyrus parietal pleura lactiferous duct Top expressed in Region I of hippocampus proper seminiferous tubule visual cortex retinal pigment epithelium ventromedial nucleus secondary oocyte amygdala dorsomedial hypothalamic nucleus superior frontal gyrus hippocampus proper More reference expression data BioGPS More reference expression data
Gene ontology Molecular function chaperone binding ubiquitin protein ligase binding protein binding adenyl-nucleotide exchange factor activity RNA binding Cellular component cytoplasm plasma membrane cytosol nucleus Biological process positive regulation of peptidyl-serine phosphorylation positive regulation of fibroblast migration negative regulation of apoptotic process negative regulation of protein targeting to mitochondrion cellular response to epidermal growth factor stimulus positive regulation of protein kinase B signaling negative regulation of phosphatidylinositol-3,4,5-trisphosphate 5-phosphatase activity positive regulation of stress fiber assembly protein folding tumor necrosis factor-mediated signaling pathway positive regulation of actin filament polymerization protein localization to plasma membrane ruffle assembly positive regulation of cell adhesion regulation of cellular response to heat cellular response to tumor necrosis factor negative regulation of mRNA modification protein heterooligomerization Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 9530 67384 Ensembl ENSG00000156735 ENSMUSG00000037316 UniProt O95429 Q8CI61 RefSeq (mRNA) NM_004874 NM_001204878 NM_026121 RefSeq (protein) NP_001191807 NP_004865 NP_080397 Location (UCSC) Chr 8: 38.18 – 38.21 Mb Chr 8: 26.25 – 26.28 Mb PubMed search [3] [4]
Wikidata
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The protein encoded by this gene is a member of the BAG1-related protein family. BAG1 is an anti-apoptotic protein that functions through interactions with a variety of cell apoptosis and growth related proteins including BCL-2, Raf-protein kinase, steroid hormone receptors, growth factor receptors and members of the heat shock protein 70 kDa family. This protein contains a BAG domain near the C-terminus, which could bind and inhibit the chaperone activity of Hsc70/Hsp70. This protein was found to be associated with the death domain of tumor necrosis factor receptor type 1 (TNF-R1) and death receptor-3 (DR3), and thereby negatively regulates downstream cell death signaling. The regulatory role of this protein in cell death was demonstrated in epithelial cells which undergo apoptosis while integrin mediated matrix contacts are lost.^[7]

BAG4 has been shown to interact with:

• APOBEC1,^[8]
• HSPA8,^[9] and
• TNFRSF1A.^[6][9]