PSMD1

Chr 2

proteasome 26S subunit, non-ATPase 1

Also known as: P112, Rpn2, S1

NCBI Gene: 5707 ENSG00000173692 UniProt: Q99460

The PSMD1 protein is the largest non-ATPase subunit of the 26S proteasome's 19S regulator lid, responsible for substrate recognition and binding in the ATP-dependent degradation of ubiquitinated proteins essential for cellular protein homeostasis. Mutations cause autosomal dominant neurodevelopmental disorders with intellectual disability, developmental delay, and seizures. This gene is highly constrained against loss-of-function variants, indicating that even single functional copies may be insufficient for normal development.

ResearchSummary from RefSeq, UniProt

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 the largest non-ATPase subunit of the 19S regulator lid, which is responsible for substrate recognition and binding. There is evidence that this proteasome and its subunits interact with viral proteins, including those of coronaviruses. Alternatively spliced transcript variants have been found for this gene.[provided by RefSeq, Aug 2020]

ResearchGenerating clinical summary…

Clinical highlights

Interpreting a novel variant

This gene is strongly intolerant of loss-of-function variation in the population, so LoF variants warrant close attention. No curated mechanism annotation is available — see the mechanism card for the computational prediction and its caveats.Based on population constraint only.

Active trials

Pubs (1 yr)

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P/LP submissions

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P/LP missense

0.12

LOEUF· LoF intol.

LOF

Mechanism· predicted

Some data sources returned errors (1)

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