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PSMD5
Identifiers
Aliases	PSMD5, S5B, proteasome 26S subunit, non-ATPase 5
External IDs	OMIM: 604452; MGI: 1914248; HomoloGene: 37999; GeneCards: PSMD5; OMA:PSMD5 - orthologs
Gene location (Human) Chr. Chromosome 9 (human) Band 9q33.2 Start 120,815,496 bp End 120,842,951 bp
Gene location (Mouse) Chr. Chromosome 2 (mouse) Band 2|2 B Start 34,739,746 bp End 34,764,980 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in hair follicle tibia epithelium of lactiferous gland lactiferous duct islet of Langerhans Achilles tendon secondary oocyte periodontal fiber lower lobe of lung gums Top expressed in fetal liver hematopoietic progenitor cell secondary oocyte primary oocyte right kidney medial ganglionic eminence endothelial cell of lymphatic vessel neural tube dentate gyrus of hippocampal formation granule cell proximal tubule Paneth cell More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein binding Cellular component cytosol proteasome regulatory particle, base subcomplex proteasome accessory complex nucleoplasm proteasome complex Biological process proteasome regulatory particle assembly proteasome assembly protein deubiquitination post-translational protein modification MAPK cascade protein polyubiquitination stimulatory C-type lectin receptor signaling pathway antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent regulation of cellular amino acid metabolic process negative regulation of G2/M transition of mitotic cell cycle anaphase-promoting complex-dependent catabolic process SCF-dependent proteasomal ubiquitin-dependent protein catabolic process tumor necrosis factor-mediated signaling pathway NIK/NF-kappaB signaling Fc-epsilon receptor signaling pathway proteasome-mediated ubiquitin-dependent protein catabolic process regulation of mRNA stability T cell receptor signaling pathway transmembrane transport Wnt signaling pathway, planar cell polarity pathway regulation of transcription from RNA polymerase II promoter in response to hypoxia interleukin-1-mediated signaling pathway negative regulation of canonical Wnt signaling pathway positive regulation of canonical Wnt signaling pathway regulation of mitotic cell cycle phase transition regulation of hematopoietic stem cell differentiation Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 5711 66998 Ensembl ENSG00000095261 ENSMUSG00000026869 UniProt Q16401 Q8BJY1 RefSeq (mRNA) NM_001270427 NM_005047 NM_080554 NM_001355544 RefSeq (protein) NP_001257356 NP_005038 NP_542121 NP_001342473 Location (UCSC) Chr 9: 120.82 – 120.84 Mb Chr 2: 34.74 – 34.76 Mb PubMed search
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26S proteasome non-ATPase regulatory subunit 5 is an enzyme that in humans is encoded by the PSMD5 gene.

Function

The 26S proteasome is a multicatalytic proteinase complex with a highly ordered structure composed of 2 complexes, a 20S core and a 19S regulator. The 20S core is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. The 19S regulator is composed of a base, which contains 6 ATPase subunits and 2 non-ATPase subunits, and a lid, which contains up to 10 non-ATPase subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. This gene encodes a non-ATPase subunit of the 19S regulator base.

Clinical significance

The proteasome and its subunits are of clinical significance for at least two reasons: (1) a compromised complex assembly or a dysfunctional proteasome can be associated with the underlying pathophysiology of specific diseases, and (2) they can be exploited as drug targets for therapeutic interventions. More recently, more effort has been made to consider the proteasome for the development of novel diagnostic markers and strategies. An improved and comprehensive understanding of the pathophysiology of the proteasome should lead to clinical applications in the future.

The proteasomes form a pivotal component for the ubiquitin–proteasome system (UPS) and corresponding cellular Protein Quality Control (PQC). Protein ubiquitination and subsequent proteolysis and degradation by the proteasome are important mechanisms in the regulation of the cell cycle, cell growth and differentiation, gene transcription, signal transduction and apoptosis. Subsequently, a compromised proteasome complex assembly and function lead to reduced proteolytic activities and the accumulation of damaged or misfolded protein species. Such protein accumulation may contribute to the pathogenesis and phenotypic characteristics in neurodegenerative diseases, cardiovascular diseases, inflammatory responses and autoimmune diseases, and systemic DNA damage responses leading to malignancies.

Several experimental and clinical studies have indicated that aberrations and deregulations of the UPS contribute to the pathogenesis of several neurodegenerative and myodegenerative disorders, including Alzheimer's disease, Parkinson's disease and Pick's disease, Amyotrophic lateral sclerosis (ALS), Huntington's disease, Creutzfeldt–Jakob disease, and motor neuron diseases, polyglutamine (PolyQ) diseases, Muscular dystrophies and several rare forms of neurodegenerative diseases associated with dementia. As part of the ubiquitin–proteasome system (UPS), the proteasome maintains cardiac protein homeostasis and thus plays a significant role in cardiac ischemic injury, ventricular hypertrophy and heart failure. Additionally, evidence is accumulating that the UPS plays an essential role in malignant transformation. UPS proteolysis plays a major role in responses of cancer cells to stimulatory signals that are critical for the development of cancer. Accordingly, gene expression by degradation of transcription factors, such as p53, c-jun, c-Fos, NF-κB, c-Myc, HIF-1α, MATα2, STAT3, sterol-regulated element-binding proteins and androgen receptors are all controlled by the UPS and thus involved in the development of various malignancies. Moreover, the UPS regulates the degradation of tumor suppressor gene products such as adenomatous polyposis coli (APC) in colorectal cancer, retinoblastoma (Rb). and von Hippel–Lindau tumor suppressor (VHL), as well as a number of proto-oncogenes (Raf, Myc, Myb, Rel, Src, Mos, ABL). The UPS is also involved in the regulation of inflammatory responses. This activity is usually attributed to the role of proteasomes in the activation of NF-κB which further regulates the expression of pro inflammatory cytokines such as TNF-α, IL-β, IL-8, adhesion molecules (ICAM-1, VCAM-1, P-selectin) and prostaglandins and nitric oxide (NO). Additionally, the UPS also plays a role in inflammatory responses as regulators of leukocyte proliferation, mainly through proteolysis of cyclines and the degradation of CDK inhibitors. Lastly, autoimmune disease patients with SLE, Sjögren syndrome and rheumatoid arthritis (RA) predominantly exhibit circulating proteasomes which can be applied as clinical biomarkers.

Interactions

PSMD5 has been shown to interact with PSMC2.

References

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Further reading

• Coux O, Tanaka K, Goldberg AL (1996). "Structure and functions of the 20S and 26S proteasomes". Annu. Rev. Biochem. 65: 801–47. doi:10.1146/annurev.bi.65.070196.004101. PMID 8811196.
• Goff SP (2003). "Death by deamination: a novel host restriction system for HIV-1". Cell. 114 (3): 281–3. doi:10.1016/S0092-8674(03)00602-0. PMID 12914693. S2CID 16340355.
• Kanayama HO, Tamura T, Ugai S, Kagawa S, Tanahashi N, Yoshimura T, Tanaka K, Ichihara A (1992). "Demonstration that a human 26S proteolytic complex consists of a proteasome and multiple associated protein components and hydrolyzes ATP and ubiquitin-ligated proteins by closely linked mechanisms". Eur. J. Biochem. 206 (2): 567–78. doi:10.1111/j.1432-1033.1992.tb16961.x. PMID 1317798.
• Nomura N, Nagase T, Miyajima N, Sazuka T, Tanaka A, Sato S, Seki N, Kawarabayasi Y, Ishikawa K, Tabata S (1995). "Prediction of the coding sequences of unidentified human genes. II. The coding sequences of 40 new genes (KIAA0041-KIAA0080) deduced by analysis of cDNA clones from human cell line KG-1". DNA Res. 1 (5): 223–9. doi:10.1093/dnares/1.5.223. PMID 7584044.
• Deveraux Q, Ustrell V, Pickart C, Rechsteiner M (1994). "A 26 S protease subunit that binds ubiquitin conjugates". J. Biol. Chem. 269 (10): 7059–61. doi:10.1016/S0021-9258(17)37244-7. PMID 8125911.
• Seeger M, Ferrell K, Frank R, Dubiel W (1997). "HIV-1 tat inhibits the 20 S proteasome and its 11 S regulator-mediated activation". J. Biol. Chem. 272 (13): 8145–8. doi:10.1074/jbc.272.13.8145. PMID 9079628.
• Madani N, Kabat D (1998). "An endogenous inhibitor of human immunodeficiency virus in human lymphocytes is overcome by the viral Vif protein". J. Virol. 72 (12): 10251–5. doi:10.1128/JVI.72.12.10251-10255.1998. PMC 110608. PMID 9811770.
• Simon JH, Gaddis NC, Fouchier RA, Malim MH (1998). "Evidence for a newly discovered cellular anti-HIV-1 phenotype". Nat. Med. 4 (12): 1397–400. doi:10.1038/3987. PMID 9846577. S2CID 25235070.
• Gorbea C, Taillandier D, Rechsteiner M (2000). "Mapping subunit contacts in the regulatory complex of the 26 S proteasome. S2 and S5b form a tetramer with ATPase subunits S4 and S7". J. Biol. Chem. 275 (2): 875–82. doi:10.1074/jbc.275.2.875. PMID 10625621.
• Mulder LC, Muesing MA (2000). "Degradation of HIV-1 integrase by the N-end rule pathway". J. Biol. Chem. 275 (38): 29749–53. doi:10.1074/jbc.M004670200. PMID 10893419.
• Sheehy AM, Gaddis NC, Choi JD, Malim MH (2002). "Isolation of a human gene that inhibits HIV-1 infection and is suppressed by the viral Vif protein". Nature. 418 (6898): 646–50. Bibcode:2002Natur.418..646S. doi:10.1038/nature00939. PMID 12167863. S2CID 4403228.
• Huang X, Seifert U, Salzmann U, Henklein P, Preissner R, Henke W, Sijts AJ, Kloetzel PM, Dubiel W (2002). "The RTP site shared by the HIV-1 Tat protein and the 11S regulator subunit alpha is crucial for their effects on proteasome function including antigen processing". J. Mol. Biol. 323 (4): 771–82. doi:10.1016/S0022-2836(02)00998-1. PMID 12419264.
• Gevaert K, Goethals M, Martens L, Van Damme J, Staes A, Thomas GR, Vandekerckhove J (2004). "Exploring proteomes and analyzing protein processing by mass spectrometric identification of sorted N-terminal peptides". Nat. Biotechnol. 21 (5): 566–9. doi:10.1038/nbt810. PMID 12665801. S2CID 23783563.
• Gaddis NC, Chertova E, Sheehy AM, Henderson LE, Malim MH (2003). "Comprehensive investigation of the molecular defect in vif-deficient human immunodeficiency virus type 1 virions". J. Virol. 77 (10): 5810–20. doi:10.1128/JVI.77.10.5810-5820.2003. PMC 154025. PMID 12719574.
• Lecossier D, Bouchonnet F, Clavel F, Hance AJ (2003). "Hypermutation of HIV-1 DNA in the absence of the Vif protein". Science. 300 (5622): 1112. doi:10.1126/science.1083338. PMID 12750511. S2CID 20591673.
• Zhang H, Yang B, Pomerantz RJ, Zhang C, Arunachalam SC, Gao L (2003). "The cytidine deaminase CEM15 induces hypermutation in newly synthesized HIV-1 DNA". Nature. 424 (6944): 94–8. Bibcode:2003Natur.424...94Z. doi:10.1038/nature01707. PMC 1350966. PMID 12808465.
• Mangeat B, Turelli P, Caron G, Friedli M, Perrin L, Trono D (2003). "Broad antiretroviral defence by human APOBEC3G through lethal editing of nascent reverse transcripts". Nature. 424 (6944): 99–103. Bibcode:2003Natur.424...99M. doi:10.1038/nature01709. PMID 12808466. S2CID 4347374.

• Genes on human chromosome 9