Seroatlas · Human Serome Atlas

FN3KRP

Ketosamine-3-kinase

Also known as: FLJ12171, FN3KL, KT3K_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
Q9HA64
Gene
FN3KRP
Ensembl
ENSG00000141560
Chromosome
17
Canonical length
309 aa
Protein class
Enzymes, Metabolic proteins, Plasma proteins, Predicted intracellular proteins
Subcellular location
Nucleoplasm

OverviewNCBI Gene

A high concentration of glucose can result in non-enzymatic oxidation of proteins by reaction of glucose and lysine residues (glycation). Proteins modified in this way are less active or functional. This gene encodes an enzyme which catalyzes the phosphorylation of psicosamines and ribulosamines compared to the neighboring gene which encodes a highly similar enzyme, fructosamine-3-kinase, which has different substrate specificity. The activity of both enzymes may result in deglycation of proteins to restore their function. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2012]

Canonical amino-acid sequenceUniProt

309 residues, UniProt reviewed canonical sequence.

>Q9HA64|FN3KRP
     1  MEELLRRELG CSSVRATGHS GGGCISQGRS YDTDQGRVFV KVNPKAEARR MFEGEMASLT
    61  AILKTNTVKV PKPIKVLDAP GGGSVLVMEH MDMRHLSSHA AKLGAQLADL HLDNKKLGEM
   121  RLKEAGTVGR GGGQEERPFV ARFGFDVVTC CGYLPQVNDW QEDWVVFYAR QRIQPQMDMV
   181  EKESGDREAL QLWSALQLKI PDLFRDLEII PALLHGDLWG GNVAEDSSGP VIFDPASFYG
   241  HSEYELAIAG MFGGFSSSFY SAYHGKIPKA PGFEKRLQLY QLFHYLNHWN HFGSGYRGSS
   301  LNIMRNLVK

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against FN3KRP 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
50 nTPM

Expression across tissuesHPA

Tissue

  • spinal cord: 50 nTPM
  • midbrain: 41 nTPM
  • amygdala: 41 nTPM
  • cerebral cortex: 40 nTPM
  • hippocampal formation: 39 nTPM
  • basal ganglia: 38 nTPM

Single-cell type

  • cytotrophoblasts: 122 nCPM
  • migrating cytotrophoblasts: 95 nCPM
  • syncytiotrophoblasts: 64 nCPM
  • extravillous trophoblasts: 50 nCPM
  • esophageal basal cells: 47 nCPM
  • hofbauer cells: 45 nCPM

Immune cell

  • plasmacytoid DC: 36 nTPM
  • naive CD4 T-cell: 33 nTPM
  • basophil: 32 nTPM
  • NK-cell: 32 nTPM
  • eosinophil: 31 nTPM
  • T-reg: 30 nTPM

Brain region

  • white matter: 40 nTPM
  • basal ganglia: 32 nTPM
  • cerebellum: 31 nTPM
  • medulla oblongata: 31 nTPM
  • spinal cord: 31 nTPM
  • thalamus: 28 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)
1.54
gnomAD pLI
0
gnomAD missense Z
-0.33
DepMap mean gene effect
0.01
DepMap dependency class
none

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 8% 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 FN3KRP as an antibody target. Whether an autoantibody or antibody against FN3KRP could matter depends on whether native FN3KRP is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

FN3KRP 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 FN3KRP as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/FN3KRP. 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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