Ectodermal dysplasia

Gene: PSMB10

Green List (high evidence)

Comment on list classification: Monoallelic variants in PSMB10 have been reported to cause ectodermal dysplasia (alopecia, hypodontia, anonychia) in at least 5 unrelated individuals. Biallelic PSMB10 variants have not been linked to ectodermal dysplasia. Hence, the gene should be promoted to Green at the next update, with MOI MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted.

Created: 10 Mar 2026, 3:14 p.m. | Last Modified: 10 Mar 2026, 3:14 p.m.

Panel Version: 4.25

MONOALLELIC CASES:
PMID: 36250618 Hebert et al., 2022
Patient 1 - severe combined immunodeficiency (SCID), ectodermal dysplasia, alopecia, hypodontia and anonychia; het de novo PSMB10 NM_002801.3: c.601G>A p.(Gly201Arg) variant.

PMID: 38503300 van der Made et al., 2024
Identified de novo PSMB10 mutations in 6 infants with SCID-Omenn syndrome. The syndromic presentation includes severe combined immunodeficiency (SCID), as well as diarrhea (6/6), alopecia (4/5), and desquamating erythematous rash (6/6). Reported variants: PSMB10: c.166G>C, p.Asp56His and c.601G>A/c.601G>C, p.Gly201Arg.

PMID: 39734035 Kuehn et al., 2025
Case report: white female with SCID, failure to thrive, diarrhea, and pruritic rash - symptom onset at 5-9 months. Trio WES identified a de novo PSMB10 variant in the proband: c.601G>A, p.Gly201Arg.

https://doi.org/10.70962/jhi.20250096 Fournier et al., 2025
Report of 3 patients with WES detected de novo heterozygous PSMB10 variants: c.614A>C p.Asp205Ala for PI and c.623C>T p.Ser208Phe for PII and PIII. Presentation: combined immunodeficiency (3/3), generalized erythroderma with desquamation (1/3), chronic diarrhea (2/3), severe liver disease (2/3).
Functional evidence: PSMB10 constructs were expressed in HEK293T cells prior to SDS-PAGE/western blotting analysis. The p.Asp205Ala and p.Ser208Phe PSMB10 variants were shown to impair proteasome assembly and exert dominant-negative effects on PSMB9 expression.

BIALLELIC CASES:
PMID: 31783057 Sarrabay et al., 2020
3yo girl with a proteasome-associated autoinflammatory syndrome, homozygous for a PSMB10 c.41T>C, p.Phe14Ser variant. She presented with failure to thrive, cutaneous rash, and hepatosplenomegaly. No immunodeficiency.

PMID: 37600812 Papendorf et al., 2023
Three unrelated Brazilian patients present with four novel PSMB10 variants. All share the p.Phe14del variant plus a different novel variant: p.Gly167Asp, p.Cys83Leufs*123, and c.710+1G>C. All 3 patients had skin lesions, recurrent fevers, failure to thrive; microcytic anemia ascertained in 2/3.

PSMB10 is now associated with AD Immunodeficiency 121 with autoinflammation, MIM:620807 & AR Proteasome-associated autoinflammatory syndrome 5, MIM:619175 (OMIM accessed 10th Mar 2026).
Sources: Literature

Created: 10 Mar 2026, 3:12 p.m.

Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Phenotypes
Immunodeficiency 121 with autoinflammation, OMIM:620807; Proteasome-associated autoinflammatory syndrome 5, OMIM:619175

Publications

• 31783057
• 36250618
• 37600812
• 38503300
• 39734035