Seroatlas · Human Serome Atlas

MAP3K20

Mitogen-activated protein kinase kinase kinase 20

Also known as: M3K20_HUMAN, MLK7, MLTK, MLTKalpha, MLTKbeta, MRK, ZAK

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

Protein identityUniProt · HPA

UniProt accession
Q9NYL2
Gene
MAP3K20
Ensembl
ENSG00000091436
Chromosome
2
Canonical length
800 aa
Protein class
Disease related genes, Enzymes, Human disease related genes, Potential drug targets, Predicted intracellular proteins
Subcellular location
Cytosol
Quaternary structure
Homodimer

OverviewNCBI Gene

This gene is a member of the MAPKKK family of signal transduction molecules and encodes a protein with an N-terminal kinase catalytic domain, followed by a leucine zipper motif and a sterile-alpha motif (SAM). This magnesium-binding protein forms homodimers and is located in the cytoplasm. The protein mediates gamma radiation signaling leading to cell cycle arrest and activity of this protein plays a role in cell cycle checkpoint regulation in cells. The protein also has pro-apoptotic activity. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

800 residues, UniProt reviewed canonical sequence.

>Q9NYL2|MAP3K20
     1  MSSLGASFVQ IKFDDLQFFE NCGGGSFGSV YRAKWISQDK EVAVKKLLKI EKEAEILSVL
    61  SHRNIIQFYG VILEPPNYGI VTEYASLGSL YDYINSNRSE EMDMDHIMTW ATDVAKGMHY
   121  LHMEAPVKVI HRDLKSRNVV IAADGVLKIC DFGASRFHNH TTHMSLVGTF PWMAPEVIQS
   181  LPVSETCDTY SYGVVLWEML TREVPFKGLE GLQVAWLVVE KNERLTIPSS CPRSFAELLH
   241  QCWEADAKKR PSFKQIISIL ESMSNDTSLP DKCNSFLHNK AEWRCEIEAT LERLKKLERD
   301  LSFKEQELKE RERRLKMWEQ KLTEQSNTPL LPSFEIGAWT EDDVYCWVQQ LVRKGDSSAE
   361  MSVYASLFKE NNITGKRLLL LEEEDLKDMG IVSKGHIIHF KSAIEKLTHD YINLFHFPPL
   421  IKDSGGEPEE NEEKIVNLEL VFGFHLKPGT GPQDCKWKMY MEMDGDEIAI TYIKDVTFNT
   481  NLPDAEILKM TKPPFVMEKW IVGIAKSQTV ECTVTYESDV RTPKSTKHVH SIQWSRTKPQ
   541  DEVKAVQLAI QTLFTNSDGN PGSRSDSSAD CQWLDTLRMR QIASNTSLQR SQSNPILGSP
   601  FFSHFDGQDS YAAAVRRPQV PIKYQQITPV NQSRSSSPTQ YGLTKNFSSL HLNSRDSGFS
   661  SGNTDTSSER GRYSDRSRNK YGRGSISLNS SPRGRYSGKS QHSTPSRGRY PGKFYRVSQS
   721  ALNPHQSPDF KRSPRDLHQP NTIPGMPLHP ETDSRASEED SKVSEGGWTK VEYRKKPHRP
   781  SPAKTNKERA RGDHRGWRNF

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against MAP3K20 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)
0.43
Highest tissue expression
261 nTPM

Expression across tissuesHPA

Tissue

  • tongue: 261 nTPM
  • skeletal muscle: 245 nTPM
  • heart muscle: 183 nTPM
  • endometrium: 72 nTPM
  • smooth muscle: 70 nTPM
  • adipose tissue: 67 nTPM

Single-cell type

  • myonuclei: 1,067 nCPM
  • thymic myoid cells: 684 nCPM
  • smooth muscle cells: 507 nCPM
  • vascular smooth muscle cells: 465 nCPM
  • cardiomyocytes: 464 nCPM
  • neutrophils: 339 nCPM

Immune cell

  • myeloid DC: 16 nTPM
  • classical monocyte: 9.4 nTPM
  • intermediate monocyte: 8.3 nTPM
  • non-classical monocyte: 8.3 nTPM
  • total PBMC: 3.4 nTPM
  • neutrophil: 2.6 nTPM

Brain region

  • choroid plexus: 28 nTPM
  • midbrain: 27 nTPM
  • medulla oblongata: 25 nTPM
  • thalamus: 22 nTPM
  • hypothalamus: 21 nTPM
  • spinal cord: 19 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about MAP3K20.

Disease | AllUniProt

Conditions MAP3K20 is implicated in, by any mechanism.

Disease | GeneticClinVar

14 pathogenic / likely-pathogenic of 454 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)
0.68
gnomAD pLI
0
DepMap mean gene effect
-0.06
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

InteractionsUniProt · HPA

Protein binding partners of MAP3K20 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 MAP3K20 as an antibody target. Whether an autoantibody or antibody against MAP3K20 could matter depends on whether native MAP3K20 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

MAP3K20 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 MAP3K20 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/MAP3K20. 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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