Seroatlas · Human Serome Atlas

AK1

Adenylate kinase isoenzyme 1

Also known as: KAD1_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
P00568
Gene
AK1
Ensembl
ENSG00000106992
Chromosome
9
Canonical length
194 aa
Protein class
Disease related genes, Enzymes, Human disease related genes, Metabolic proteins, Plasma proteins, Potential drug targets, Predicted intracellular proteins
Subcellular location
Cytosol,Annulus

OverviewNCBI Gene

This gene encodes an adenylate kinase enzyme involved in energy metabolism and homeostasis of cellular adenine nucleotide ratios in different intracellular compartments. This gene is highly expressed in skeletal muscle, brain and erythrocytes. Certain mutations in this gene resulting in a functionally inadequate enzyme are associated with a rare genetic disorder causing nonspherocytic hemolytic anemia. Alternative splicing of this gene results in multiple transcript variants encoding different isoforms. This gene shares readthrough transcripts with the upstream ST6GALNAC6 gene. [provided by RefSeq, Jan 2022]

Canonical amino-acid sequenceUniProt

194 residues, UniProt reviewed canonical sequence.

>P00568|AK1
     1  MEEKLKKTKI IFVVGGPGSG KGTQCEKIVQ KYGYTHLSTG DLLRSEVSSG SARGKKLSEI
    61  MEKGQLVPLE TVLDMLRDAM VAKVNTSKGF LIDGYPREVQ QGEEFERRIG QPTLLLYVDA
   121  GPETMTQRLL KRGETSGRVD DNEETIKKRL ETYYKATEPV IAFYEKRGIV RKVNAEGSVD
   181  SVFSQVCTHL DALK

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against AK1 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)
0.26
Highest tissue expression
1,263 nTPM

Expression across tissuesHPA

Tissue

  • skeletal muscle: 1,263 nTPM
  • tongue: 731 nTPM
  • choroid plexus: 523 nTPM
  • fallopian tube: 322 nTPM
  • heart muscle: 313 nTPM
  • amygdala: 105 nTPM

Single-cell type

  • epididymal efferent duct ciliated cells: 1,136 nCPM
  • ependymal cells: 325 nCPM
  • fallopian tube ciliated cells: 198 nCPM
  • colonocytes: 106 nCPM
  • alveolar cells type 2: 71 nCPM
  • late spermatids: 69 nCPM

Immune cell

  • plasmacytoid DC: 0.9 nTPM
  • neutrophil: 0.4 nTPM
  • gdT-cell: 0.3 nTPM
  • basophil: 0.2 nTPM
  • MAIT T-cell: 0.2 nTPM
  • memory CD8 T-cell: 0.2 nTPM

Brain region

  • choroid plexus: 184 nTPM
  • spinal cord: 99 nTPM
  • midbrain: 89 nTPM
  • medulla oblongata: 87 nTPM
  • white matter: 78 nTPM
  • thalamus: 65 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about AK1.

Disease | AllUniProt

Conditions AK1 is implicated in, by any mechanism.

Disease | GeneticClinVar

11 pathogenic / likely-pathogenic of 107 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 LOEUF (loss-of-function intolerance)
0.94
gnomAD pLI
0.03
gnomAD missense Z
0.65
DepMap mean gene effect
-0.18
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% 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 AK1 as an antibody target. Whether an autoantibody or antibody against AK1 could matter depends on whether native AK1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

AK1 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 AK1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/AK1. 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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