Seroatlas · Human Serome Atlas

SLC25A27

Mitochondrial uncoupling protein 4

Also known as: FLJ33552, UCP4, UCP4_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
O95847
Gene
SLC25A27
Ensembl
ENSG00000153291
Chromosome
6
Canonical length
323 aa
Protein class
Metabolic proteins, Plasma proteins, Predicted intracellular proteins, Predicted membrane proteins, Transporters
Subcellular location
Mitochondria
Quaternary structure
Homotetramer

OverviewNCBI Gene

Mitochondrial uncoupling proteins (UCP) are members of the larger family of mitochondrial anion carrier proteins (MACP). UCPs separate oxidative phosphorylation from ATP synthesis with energy dissipated as heat, also referred to as the mitochondrial proton leak. UCPs facilitate the transfer of anions from the inner to the outer mitochondrial membrane and the return transfer of protons from the outer to the inner mitochondrial membrane. They also reduce the mitochondrial membrane potential in mammalian cells. Tissue specificity occurs for the different UCPs and the exact methods of how UCPs transfer H+/OH- are not known. UCPs contain the three homologous protein domains of MACPs. Transcripts of this gene are only detected in brain tissue and are specifically modulated by various environmental conditions. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Feb 2011]

Canonical amino-acid sequenceUniProt

323 residues, UniProt reviewed canonical sequence.

>O95847|SLC25A27
     1  MSVPEEEERL LPLTQRWPRA SKFLLSGCAA TVAELATFPL DLTKTRLQMQ GEAALARLGD
    61  GARESAPYRG MVRTALGIIE EEGFLKLWQG VTPAIYRHVV YSGGRMVTYE HLREVVFGKS
   121  EDEHYPLWKS VIGGMMAGVI GQFLANPTDL VKVQMQMEGK RKLEGKPLRF RGVHHAFAKI
   181  LAEGGIRGLW AGWVPNIQRA ALVNMGDLTT YDTVKHYLVL NTPLEDNIMT HGLSSLCSGL
   241  VASILGTPAD VIKSRIMNQP RDKQGRGLLY KSSTDCLIQA VQGEGFMSLY KGFLPSWLRM
   301  TPWSMVFWLT YEKIREMSGV SPF

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against SLC25A27 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
Other membrane
Secreted
No
Transmembrane segments
6
Mean surface accessibility (rSASA)
0.3
Highest tissue expression
110 nTPM

Expression across tissuesHPA

Tissue

  • retina: 110 nTPM
  • pituitary gland: 107 nTPM
  • ovary: 92 nTPM
  • cerebellum: 78 nTPM
  • choroid plexus: 72 nTPM
  • prostate: 70 nTPM

Single-cell type

  • thyrotrophs: 314 nCPM
  • oligodendrocyte progenitor cells: 167 nCPM
  • cardiomyocytes: 163 nCPM
  • choroid plexus epithelial cells: 147 nCPM
  • somatotrophs: 145 nCPM
  • gonadotrophs: 141 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

  • cerebellum: 154 nTPM
  • white matter: 110 nTPM
  • basal ganglia: 92 nTPM
  • thalamus: 88 nTPM
  • cerebral cortex: 87 nTPM
  • choroid plexus: 84 nTPM

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 LOEUF (loss-of-function intolerance)
0.72
gnomAD pLI
0
gnomAD missense Z
1.34
DepMap mean gene effect
-0.12
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 5% 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

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads SLC25A27 as an antibody target. Whether an autoantibody or antibody against SLC25A27 could matter depends on whether native SLC25A27 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

SLC25A27 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 SLC25A27 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/SLC25A27. 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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