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PSMA3 proteasome 20S subunit alpha 3 [ Homo sapiens (human) ]

Gene ID: 5684, updated on 5-Jun-2022

Summary

Official Symbol
PSMA3provided by HGNC
Official Full Name
proteasome 20S subunit alpha 3provided by HGNC
Primary source
HGNC:HGNC:9532
See related
Ensembl:ENSG00000100567 MIM:176843; AllianceGenome:HGNC:9532
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
HC8; PSC3
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 peptidase T1A family, that is a 20S core alpha subunit. Two alternative transcripts encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]
Expression
Ubiquitous expression in appendix (RPKM 46.2), lymph node (RPKM 44.1) and 25 other tissues See more
Orthologs
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Genomic context

See PSMA3 in Genome Data Viewer
Location:
14q23.1
Exon count:
11
Annotation release Status Assembly Chr Location
110 current GRCh38.p14 (GCF_000001405.40) 14 NC_000014.9 (58244843..58272004)
110 current T2T-CHM13v2.0 (GCF_009914755.1) 14 NC_060938.1 (52451770..52478987)
105.20220307 previous assembly GRCh37.p13 (GCF_000001405.25) 14 NC_000014.8 (58711561..58738722)

Chromosome 14 - NC_000014.9Genomic Context describing neighboring genes Neighboring gene actin related protein 10 Neighboring gene tRNA-Lys (anticodon CTT) 1-1 Neighboring gene PSMA3 antisense RNA 1 Neighboring gene HNF4 motif-containing MPRA enhancer 46 Neighboring gene high mobility group box 1 pseudogene 14

Genomic regions, transcripts, and products

Expression

  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

GeneRIFs: Gene References Into Functions

What's a GeneRIF?

HIV-1 interactions

Replication interactions

Interaction Pubs
Knockdown of proteasome (prosome, macropain) subunit, alpha type, 3 (PSMA3) by siRNA inhibits the early stages of HIV-1 replication in 293T cells infected with VSV-G pseudotyped HIV-1 PubMed

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

Pathways from PubChem

Interactions

Products Interactant Other Gene Complex Source Pubs Description

General gene information

Markers

Homology

Clone Names

  • MGC12306, MGC32631

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables ubiquitin protein ligase binding IPI
Inferred from Physical Interaction
more info
PubMed 
Component Evidence Code Pubs
is_active_in cytoplasm IDA
Inferred from Direct Assay
more info
PubMed 
located_in cytoplasm TAS
Traceable Author Statement
more info
PubMed 
located_in cytosol TAS
Traceable Author Statement
more info
 
located_in extracellular exosome HDA PubMed 
located_in nucleoplasm TAS
Traceable Author Statement
more info
 
located_in nucleus HDA PubMed 
is_active_in nucleus IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
is_active_in nucleus IDA
Inferred from Direct Assay
more info
PubMed 
located_in nucleus TAS
Traceable Author Statement
more info
PubMed 
part_of proteasome complex IC
Inferred by Curator
more info
PubMed 
part_of proteasome complex IDA
Inferred from Direct Assay
more info
PubMed 
part_of proteasome core complex IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
part_of proteasome core complex IDA
Inferred from Direct Assay
more info
PubMed 
part_of proteasome core complex, alpha-subunit complex IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
part_of proteasome core complex, alpha-subunit complex ISS
Inferred from Sequence or Structural Similarity
more info
 
is_active_in synapse IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 

General protein information

Preferred Names
proteasome subunit alpha type-3
Names
macropain subunit C8
multicatalytic endopeptidase complex subunit C8
proteasome (prosome, macropain) subunit, alpha type, 3
proteasome component C8
proteasome subunit C8
proteasome subunit alpha 3
proteasome subunit alpha7
testicular secretory protein Li 43
NP_002779.1
NP_687033.1

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)

  1. NM_002788.4NP_002779.1  proteasome subunit alpha type-3 isoform 1

    See identical proteins and their annotated locations for NP_002779.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) encodes the longer isoform.
    Source sequence(s)
    BC038990, CF128376, D00762
    Consensus CDS
    CCDS9731.1
    UniProtKB/Swiss-Prot
    P25788
    UniProtKB/TrEMBL
    A0A140VK43
    Related
    ENSP00000216455.4, ENST00000216455.9
    Conserved Domains (1) summary
    cd03751
    Location:5217
    proteasome_alpha_type_3; 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 stack on top of one another forming ...
  2. NM_152132.3NP_687033.1  proteasome subunit alpha type-3 isoform 2

    See identical proteins and their annotated locations for NP_687033.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) uses an alternate in-frame splice site in the coding region, compared to variant 1, resulting in a shorter protein (isoform 2).
    Source sequence(s)
    BC005265, CF128376
    Consensus CDS
    CCDS45113.1
    UniProtKB/Swiss-Prot
    P25788
    Related
    ENSP00000390491.2, ENST00000412908.6
    Conserved Domains (1) summary
    cd03751
    Location:5210
    proteasome_alpha_type_3; proteasome_alpha_type_3. 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 stack on ...

RNA

  1. NR_038123.2 RNA Sequence

    Status: REVIEWED

    Description
    Transcript Variant: This variant (3) is represented as non-coding because the use of the expected translation start codon, as used in variant 1, renders the transcript a candidate for nonsense-mediated decay (NMD). The coding potential from internal start codons is unknown.
    Source sequence(s)
    BG703488, CF128376, DB520127
    Related
    ENST00000557508.5

RefSeqs of Annotated Genomes: Homo sapiens Annotation Release 110 details...Open this link in a new tab

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000014.9 Reference GRCh38.p14 Primary Assembly

    Range
    58244843..58272004
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060938.1 Alternate T2T-CHM13v2.0

    Range
    52451770..52478987
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)