PSMB2 proteasome 20S subunit beta 2 [Homo sapiens (human)] - Gene

Summary

Official Symbol: PSMB2provided by HGNC
Official Full Name: proteasome 20S subunit beta 2provided by HGNC
Primary source: HGNC:HGNC:9539
See related: Ensembl:ENSG00000126067 MIM:602175; AllianceGenome:HGNC:9539
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: HC7-I
Summary: 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. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Dec 2010]
Expression: Ubiquitous expression in placenta (RPKM 11.8), lymph node (RPKM 10.8) and 25 other tissues See more
Orthologs: mouse all
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Genomic context

Location:: 1p34.3

Exon count:: 7

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	1	NC_000001.11 (35599541..35641526, complement)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	1	NC_060925.1 (35462557..35504550, complement)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	1	NC_000001.10 (36065142..36107127, complement)

Chromosome 1 - NC_000001.11 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

NUDT21 inhibits HCC proliferation, metastasis and tumorigenesis, at least in part, by suppressing PSMB2 and CXXC5.
Title: NUDT21 negatively regulates PSMB2 and CXXC5 by alternative polyadenylation and contributes to hepatocellular carcinoma suppression.
Results showed that the overexpression of beta2 subunit decreased homologous recombination in human cells without altering the cell proteasome activity and the Rad51p level.
Title: The over-expression of the β2 catalytic subunit of the proteasome decreases homologous recombination and impairs DNA double-strand break repair in human cells.
This subunit propeptides influence cooperative proteasome assembly.
Title: Beta 2 subunit propeptides influence cooperative proteasome assembly.

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Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

HIV-1 interactions

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Protein interactions

Protein	Gene	Interaction	Pubs
Tat	tat	HIV-1 Tat slightly enhances the activity of the purified 26 S proteasome	PubMed
	tat	Amino acids Lys51, Arg52, and Asp67 of HIV-1 Tat represent the proteasome binding site of Tat, and Tat amino acids 37-72 are necessary for proteasomal interaction and suppression of 11 S regulator-mediated antigen presentation	PubMed
	tat	HIV-1 Tat inhibits the peptidase activity of the 20 S proteasome and interferes with the formation of the 20 S proteasome-11 S regulator complex	PubMed
	tat	HIV-1 Tat binds to the alpha2, alpha4, alpha6, alpha7, beta1, beta2, beta3, beta5, beta6, beta7, LMP7/beta5i, and MECL1/beta2i subunits of the proteasome 20 S core structure and can inhibit cellular proteasome function	PubMed
Vif	vif	HIV-1 Vif binds to the cellular cytidine deaminase APOBEC3G and targets it for degradation through an interaction with the proteasome, thereby inhibiting APOBEC3G mediated restriction of HIV-1 replication	PubMed
integrase	gag-pol	Proteasomal degradation of HIV-1 integrase in mammalian cells occurs by the N-end rule pathway	PubMed

Go to the HIV-1, Human Interaction Database

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

D10S275 (e-PCR)
- UniSTS:147992

SHGC-74576 (e-PCR)
- UniSTS:54319

D8S2279 (e-PCR)
- UniSTS:473907

SHGC-74572 (e-PCR)
- UniSTS:30275

AB049870 (e-PCR)
- UniSTS:480103

D1S1425 (e-PCR)
- UniSTS:149621

G35510 (e-PCR)
- UniSTS:44150

NoName (e-PCR)
- UniSTS:486264

D11S3114 (e-PCR)
- UniSTS:152207

SHGC-35307 (e-PCR)
- UniSTS:2779

D15S1390 (e-PCR)
- UniSTS:474340

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed

Process	Evidence Code	Pubs
involved_in proteasome-mediated ubiquitin-dependent protein catabolic process	IBA Inferred from Biological aspect of Ancestor more info
involved_in proteasome-mediated ubiquitin-dependent protein catabolic process	NAS Non-traceable Author Statement more info	PubMed
involved_in response to organic cyclic compound	IEA Inferred from Electronic Annotation more info

Component	Evidence Code	Pubs
is_active_in cytoplasm	IDA Inferred from Direct Assay more info	PubMed
is_active_in cytosol	IBA Inferred from Biological aspect of Ancestor more info
located_in cytosol	TAS Traceable Author Statement more info
located_in extracellular exosome	HDA more info	PubMed
located_in membrane	HDA more info	PubMed
located_in nucleoplasm	IDA Inferred from Direct Assay more info
located_in nucleoplasm	TAS Traceable Author Statement more info
located_in nucleus	HDA more info	PubMed
is_active_in nucleus	IBA Inferred from Biological aspect of Ancestor more info
is_active_in nucleus	IDA Inferred from Direct Assay more info	PubMed
part_of proteasome complex	IDA Inferred from Direct Assay more info	PubMed
part_of proteasome complex	NAS Non-traceable Author Statement more info	PubMed
part_of proteasome core complex	IDA Inferred from Direct Assay more info	PubMed
part_of proteasome core complex	ISS Inferred from Sequence or Structural Similarity more info
part_of proteasome core complex, beta-subunit complex	IBA Inferred from Biological aspect of Ancestor more info
part_of proteasome core complex, beta-subunit complex	ISS Inferred from Sequence or Structural Similarity more info

General protein information

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Preferred Names: proteasome subunit beta type-2

Names: beta-4; macropain subunit C7-I; multicatalytic endopeptidase complex subunit C7-1; multicatalytic endopeptidase complex subunit C7-I; proteasome (prosome, macropain) subunit, beta type, 2; proteasome beta 2 subunit; proteasome component C7-I; proteasome subunit beta 2; proteasome subunit beta-4; proteasome subunit beta4; proteasome subunit, beta type, 2; testicular tissue protein Li 152

NP_001186708.1

EC 3.4.25.1

NP_001186709.1

EC 3.4.25.1

NP_002785.1

EC 3.4.25.1

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

NM_001199779.2 → NP_001186708.1 proteasome subunit beta type-2 isoform 2

See identical proteins and their annotated locations for NP_001186708.1

Status: REVIEWED

Description

Transcript Variant: This variant (2) lacks an in-frame segment in the 5' region, as compared to variant 1. The resulting isoform (2) lacks an internal segment in the N-terminus, as compared to isoform 1.

Source sequence(s)

AK296956, AL157951, BM664618

UniProtKB/TrEMBL

B7Z478

Conserved Domains (1) summary

cd03758
Location:6 → 167

proteasome_beta_type_2; proteasome beta type-2 subunit. The 20S proteasome, multisubunit proteolytic complex, is the central enzyme of nonlysosomal protein degradation in both the cytosol and nucleus. It is composed of 28 subunits arranged as four homoheptameric rings that ...
NM_001199780.2 → NP_001186709.1 proteasome subunit beta type-2 isoform 3

See identical proteins and their annotated locations for NP_001186709.1

Status: REVIEWED

Description

Transcript Variant: This variant (3) lacks two exons from the 5' end and has an alternate 5' exon, as compared to variant 1. The resulting isoform (3) is shorter at the N-terminus, as compared to isoform 1.

Source sequence(s)

AK310023, AL157951, BM664618

Consensus CDS

CCDS72755.1

UniProtKB/TrEMBL

A0A087WVV1

Related

ENSP00000479706.1, ENST00000621781.4

Conserved Domains (1) summary

cl00467
Location:1 → 75

Ntn_hydrolase; The Ntn hydrolases (N-terminal nucleophile) are a diverse superfamily of of enzymes that are activated autocatalytically via an N-terminally lcated nucleophilic amino acid. N-terminal nucleophile (NTN-) hydrolase superfamily, which contains a ...
NM_002794.5 → NP_002785.1 proteasome subunit beta type-2 isoform 1

See identical proteins and their annotated locations for NP_002785.1

Status: REVIEWED

Description

Transcript Variant: This variant (1) encodes the longest isoform (1).

Source sequence(s)

AL157951, AL354864, BC101836, BM664618

Consensus CDS

CCDS394.1

UniProtKB/Swiss-Prot

D3DPS0, P31145, P49721, Q9BWZ9

UniProtKB/TrEMBL

A0A140VJS6

Related

ENSP00000362334.3, ENST00000373237.4

Conserved Domains (1) summary

cd03758
Location:1 → 192

proteasome_beta_type_2; proteasome beta type-2 subunit. The 20S proteasome, multisubunit proteolytic complex, is the central enzyme of nonlysosomal protein degradation in both the cytosol and nucleus. It is composed of 28 subunits arranged as four homoheptameric rings that ...