PSMB2

From Wikipedia, the free encyclopedia

Proteasome (prosome, macropain) subunit, beta type, 2

PDB rendering based on 1iru.

Available structures: 1iru

Identifiers

Symbol(s)

PSMB2; HC7-I; MGC104215; MGC126885

External IDs

OMIM: 602175 MGI: 1347045 HomoloGene: 2088

Gene ontology
Molecular Function:	• threonine endopeptidase activity
Cellular Component:	• nucleus • cytosol • proteasome core complex (sensu Eukaryota)
Biological Process:	• ubiquitin-dependent protein catabolic process

RNA expression pattern

More reference expression data

Orthologs

Human

Mouse

Refseq

NM_002794 (mRNA)
NP_002785 (protein)

NM_011970 (mRNA)
NP_036100 (protein)

Location

Chr 1: 35.81 - 35.88 Mb

Chr 4: 126.18 - 126.21 Mb

Pubmed search

[1]

[2]

Proteasome (prosome, macropain) subunit, beta type, 2, also known as PSMB2, is a human gene.

The proteasome is a multicatalytic proteinase complex with a highly ordered ring-shaped 20S core structure. The core structure 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. 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 member of the proteasome B-type family, also known as the T1B family, that is a 20S core beta subunit.^[1]

[edit] References

^ Entrez Gene: PSMB2 proteasome (prosome, macropain) subunit, beta type, 2.

[edit] 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. PMID 12914693.
Rasmussen HH, van Damme J, Puype M, et al. (1993). "Microsequences of 145 proteins recorded in the two-dimensional gel protein database of normal human epidermal keratinocytes.". Electrophoresis 13 (12): 960-9. PMID 1286667.
Dawson SJ, White LA (1992). "Treatment of Haemophilus aphrophilus endocarditis with ciprofloxacin.". J. Infect. 24 (3): 317-20. PMID 1602151.
Kristensen P, Johnsen AH, Uerkvitz W, et al. (1995). "Human proteasome subunits from 2-dimensional gels identified by partial sequencing.". Biochem. Biophys. Res. Commun. 205 (3): 1785-9. PMID 7811265.
Nothwang HG, Tamura T, Tanaka K, Ichihara A (1994). "Sequence analyses and inter-species comparisons of three novel human proteasomal subunits, HsN3, HsC7-I and HsC10-II, confine potential proteolytic active-site residues.". Biochim. Biophys. Acta 1219 (2): 361-8. PMID 7918633.
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. PMID 9079628.
McCusker D, Jones T, Sheer D, Trowsdale J (1998). "Genetic relationships of the genes encoding the human proteasome beta subunits and the proteasome PA28 complex.". Genomics 45 (2): 362-7. doi:10.1006/geno.1997.4948. PMID 9344661.
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. 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.
Elenich LA, Nandi D, Kent AE, et al. (1999). "The complete primary structure of mouse 20S proteasomes.". Immunogenetics 49 (10): 835-42. PMID 10436176.
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.
Feng Y, Longo DL, Ferris DK (2001). "Polo-like kinase interacts with proteasomes and regulates their activity.". Cell Growth Differ. 12 (1): 29-37. PMID 11205743.
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. doi:10.1038/nature00939. PMID 12167863.
Huang X, Seifert U, Salzmann U, et al. (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. PMID 12419264.
De M, Jayarapu K, Elenich L, et al. (2003). "Beta 2 subunit propeptides influence cooperative proteasome assembly.". J. Biol. Chem. 278 (8): 6153-9. doi:10.1074/jbc.M209292200. PMID 12456675.
Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899-903. doi:10.1073/pnas.242603899. PMID 12477932.
Gaddis NC, Chertova E, Sheehy AM, et al. (2003). "Comprehensive investigation of the molecular defect in vif-deficient human immunodeficiency virus type 1 virions.". J. Virol. 77 (10): 5810-20. 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.