Seroatlas · Human Serome Atlas

MAP4K5

Mitogen-activated protein kinase kinase kinase kinase 5

Also known as: GCKR, KHS, KHS1, M4K5_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
Q9Y4K4
Gene
MAP4K5
Ensembl
ENSG00000012983
Chromosome
14
Canonical length
846 aa
Protein class
Enzymes, Predicted intracellular proteins
Subcellular location
Plasma membrane,Primary cilium,Cytosol

OverviewNCBI Gene

This gene encodes a member of the serine/threonine protein kinase family, that is highly similar to yeast SPS1/STE20 kinase. Yeast SPS1/STE20 functions near the beginning of the MAP kinase signal cascades that is essential for yeast pheromone response. This kinase was shown to activate Jun kinase in mammalian cells, which suggested a role in stress response. Two alternatively spliced transcript variants encoding the same protein have been described for this gene. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

846 residues, UniProt reviewed canonical sequence.

>Q9Y4K4|MAP4K5
     1  MEAPLRPAAD ILRRNPQQDY ELVQRVGSGT YGDVYKARNV HTGELAAVKI IKLEPGDDFS
    61  LIQQEIFMVK ECKHCNIVAY FGSYLSREKL WICMEYCGGG SLQDIYHVTG PLSELQIAYV
   121  CRETLQGLAY LHTKGKMHRD IKGANILLTD HGDVKLADFG VAAKITATIA KRKSFIGTPY
   181  WMAPEVAAVE KNGGYNQLCD IWAVGITAIE LGELQPPMFD LHPMRALFLM SKSNFQPPKL
   241  KDKTKWSSTF HNFVKIALTK NPKKRPTAER LLTHTFVAQP GLSRALAVEL LDKVNNPDNH
   301  AHYTEADDDD FEPHAIIRHT IRSTNRNARA ERTASEINFD KLQFEPPLRK ETEARDEMGL
   361  SSDPNFMLQW NPFVDGANTG KSTSKRAIPP PLPPKPRISS YPEDNFPDEE KASTIKHCPD
   421  SESRAPQILR RQSSPSCGPV AETSSIGNGD GISKLMSENT EGSAQAPQLP RKKDKRDFPK
   481  PAINGLPPTP KVLMGACFSK VFDGCPLKIN CATSWIHPDT KDQYIIFGTE DGIYTLNLNE
   541  LHEATMEQLF PRKCTWLYVI NNTLMSLSEG KTFQLYSHNL IALFEHAKKP GLAAHIQTHR
   601  FPDRILPRKF ALTTKIPDTK GCHKCCIVRN PYTGHKYLCG ALQSGIVLLQ WYEPMQKFML
   661  IKHFDFPLPS PLNVFEMLVI PEQEYPMVCV AISKGTESNQ VVQFETINLN SASSWFTEIG
   721  AGSQQLDSIH VTQLERDTVL VCLDKFVKIV NLQGKLKSSK KLASELSFDF RIESVVCLQD
   781  SVLAFWKHGM QGKSFKSDEV TQEISDETRV FRLLGSDRVV VLESRPTENP TAHSNLYILA
   841  GHENSY

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against MAP4K5 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)
0.34
Highest tissue expression
31 nTPM

Expression across tissuesHPA

Tissue

  • endometrium: 31 nTPM
  • ovary: 28 nTPM
  • skin: 28 nTPM
  • cervix: 26 nTPM
  • smooth muscle: 22 nTPM
  • breast: 21 nTPM

Single-cell type

  • oligodendrocytes: 907 nCPM
  • oligodendrocyte progenitor cells: 456 nCPM
  • schwann cells: 404 nCPM
  • ocular epithelial cells: 391 nCPM
  • platelets: 367 nCPM
  • urothelial cells: 361 nCPM

Immune cell

  • basophil: 19 nTPM
  • eosinophil: 5.5 nTPM
  • NK-cell: 2.1 nTPM
  • plasmacytoid DC: 1.3 nTPM
  • MAIT T-cell: 1.2 nTPM
  • memory CD8 T-cell: 1.2 nTPM

Brain region

  • white matter: 42 nTPM
  • basal ganglia: 26 nTPM
  • medulla oblongata: 24 nTPM
  • pons: 23 nTPM
  • thalamus: 21 nTPM
  • midbrain: 21 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)
0.28
gnomAD pLI
0.99
gnomAD missense Z
2.06
DepMap mean gene effect
0.03
DepMap dependency class
none

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

InteractionsUniProt · HPA

Protein binding partners of MAP4K5 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 MAP4K5 as an antibody target. Whether an autoantibody or antibody against MAP4K5 could matter depends on whether native MAP4K5 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

MAP4K5 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 MAP4K5 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/MAP4K5. 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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