Seroatlas · Human Serome Atlas

USP26

Ubiquitin carboxyl-terminal hydrolase 26

Also known as: UBP26_HUMAN

Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene

Protein identityUniProt · HPA

UniProt accession
Q9BXU7
Gene
USP26
Ensembl
ENSG00000134588
Chromosome
X
Canonical length
913 aa
Protein class
Enzymes, Metabolic proteins, Plasma proteins, Predicted intracellular proteins
Subcellular location
Nucleoplasm,Cytosol

OverviewNCBI Gene

This gene encodes a member of the ubiquitin-specific processing (UBP) family of proteases and is a deubiquitinating enzyme (DUB) with His and Cys domains. It is specifically expressed in testis tissue. Mutations in this gene have been associated with Sertoli cell-only syndrome and male infertility. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

913 residues, UniProt reviewed canonical sequence.

>Q9BXU7|USP26
     1  MAALFLRGFV QIGNCKTGIS KSKEAFIEAV ERKKKDRLVL YFKSGKYSTF RLSDNIQNVV
    61  LKSYRGNQNH LHLTLQNNNG LFIEGLSSTD AEQLKIFLDR VHQNEVQPPV RPGKGGSVFS
   121  STTQKEINKT SFHKVDEKSS SKSFEIAKGS GTGVLQRMPL LTSKLTLTCG ELSENQHKKR
   181  KRMLSSSSEM NEEFLKENNS VEYKKSKADC SRCVSYNREK QLKLKELEEN KKLECESSCI
   241  MNATGNPYLD DIGLLQALTE KMVLVFLLQQ GYSDGYTKWD KLKLFFELFP EKICHGLPNL
   301  GNTCYMNAVL QSLLSIPSFA DDLLNQSFPW GKIPLNALTM CLARLLFFKD TYNIEIKEML
   361  LLNLKKAISA AAEIFHGNAQ NDAHEFLAHC LDQLKDNMEK LNTIWKPKSE FGEDNFPKQV
   421  FADDPDTSGF SCPVITNFEL ELLHSIACKA CGQVILKTEL NNYLSINLPQ RIKAHPSSIQ
   481  STFDLFFGAE ELEYKCAKCE HKTSVGVHSF SRLPRILIVH LKRYSLNEFC ALKKNDQEVI
   541  ISKYLKVSSH CNEGTRPPLP LSEDGEITDF QLLKVIRKMT SGNISVSWPA TKESKDILAP
   601  HIGSDKESEQ KKGQTVFKGA SRRQQQKYLG KNSKPNELES VYSGDRAFIE KEPLAHLMTY
   661  LEDTSLCQFH KAGGKPASSP GTPLSKVDFQ TVPENPKRKK YVKTSKFVAF DRIINPTKDL
   721  YEDKNIRIPE RFQKVSEQTQ QCDGMRICEQ APQQALPQSF PKPGTQGHTK NLLRPTKLNL
   781  QKSNRNSLLA LGSNKNPRNK DILDKIKSKA KETKRNDDKG DHTYRLISVV SHLGKTLKSG
   841  HYICDAYDFE KQIWFTYDDM RVLGIQEAQM QEDRRCTGYI FFYMHNEIFE EMLKREENAQ
   901  LNSKEVEETL QKE

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against USP26 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.

Antibody reachability
Intracellular
Secreted
No
Transmembrane segments
0
Mean surface accessibility (rSASA)
0.47
Highest tissue expression
0.4 nTPM

Expression across tissuesHPA

Tissue

  • testis: 0.4 nTPM
  • adipose tissue: 0 nTPM
  • adrenal gland: 0 nTPM
  • amygdala: 0 nTPM
  • appendix: 0 nTPM
  • basal ganglia: 0 nTPM

Single-cell type

  • differentiating spermatogonia: 20 nCPM
  • undifferentiated spermatogonia: 7.5 nCPM
  • early primary spermatocytes: 4.5 nCPM
  • retinal horizontal cells: 2 nCPM
  • breast myoepithelial cells: 1.7 nCPM
  • foveolar cells: 1.3 nCPM

Immune cell

  • basophil: 0 nTPM
  • classical monocyte: 0 nTPM
  • eosinophil: 0 nTPM
  • gdT-cell: 0 nTPM
  • intermediate monocyte: 0 nTPM
  • MAIT T-cell: 0 nTPM

Brain region

  • amygdala: 0.4 nTPM
  • cerebral cortex: 0.4 nTPM
  • white matter: 0.4 nTPM
  • basal ganglia: 0.3 nTPM
  • cerebellum: 0.3 nTPM
  • choroid plexus: 0.3 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about USP26.

Disease | AllUniProt

Conditions USP26 is implicated in, by any mechanism.

Disease | GeneticClinVar

3 pathogenic / likely-pathogenic of 104 ClinVar records.

Conditions with pathogenic or likely-pathogenic variants.

Genetic constraint and essentialitygnomAD · DepMap

Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.

gnomAD missense Z
-0.08
DepMap mean gene effect
0.25
DepMap dependency class
none

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).

OntologyGO

Biological processes

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

InteractionsUniProt · HPA

Protein binding partners of USP26 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads USP26 as an antibody target. Whether an autoantibody or antibody against USP26 could matter depends on whether native USP26 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

USP26 is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.

Annotation status

The present source text does not explicitly label USP26 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/USP26. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

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