IPMK
Inositol polyphosphate multikinase
Also known as: IPMK_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q8NFU5
- Gene
- IPMK
- Ensembl
- ENSG00000151151
- Chromosome
- 10
- Canonical length
- 416 aa
- Protein class
- Enzymes, Metabolic proteins, Predicted intracellular proteins
- Subcellular location
- Nucleoplasm,Basal body
OverviewNCBI Gene
This gene encodes a member of the inositol phosphokinase family. The encoded protein has 3-kinase, 5-kinase and 6-kinase activities on phosphorylated inositol substrates. The encoded protein plays an important role in the biosynthesis of inositol 1,3,4,5,6-pentakisphosphate, and has a preferred 5-kinase activity. This gene may play a role in nuclear mRNA export. Pseudogenes of this gene are located on the long arm of chromosome 13 and the short arm of chromosome 19. [provided by RefSeq, Dec 2010]
Canonical amino-acid sequenceUniProt
416 residues, UniProt reviewed canonical sequence.
>Q8NFU5|IPMK
1 MATEPPSPLR VEAPGPPEMR TSPAIESTPE GTPQPAGGRL RFLNGCVPLS HQVAGHMYGK
61 DKVGILQHPD GTVLKQLQPP PRGPRELEFY NMVYAADCFD GVLLELRKYL PKYYGIWSPP
121 TAPNDLYLKL EDVTHKFNKP CIMDVKIGQK SYDPFASSEK IQQQVSKYPL MEEIGFLVLG
181 MRVYHVHSDS YETENQHYGR SLTKETIKDG VSRFFHNGYC LRKDAVAASI QKIEKILQWF
241 ENQKQLNFYA SSLLFVYEGS SQPTTTKLND RTLAEKFLSK GQLSDTEVLE YNNNFHVLSS
301 TANGKIESSV GKSLSKMYAR HRKIYTKKHH SQTSLKVENL EQDNGWKSMS QEHLNGNVLS
361 QLEKVFYHLP TGCQEIAEVE VRMIDFAHVF PSNTIDEGYV YGLKHLISVL RSILDNLocalizationUniProt · AlphaFold · HPA
Whether an antibody against IPMK 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)
- 0.39
- Highest tissue expression
- 17 nTPM
Expression across tissuesHPA
Tissue
- liver: 17 nTPM
- parathyroid gland: 11 nTPM
- small intestine: 9.8 nTPM
- placenta: 8.2 nTPM
- duodenum: 7.5 nTPM
- colon: 6.6 nTPM
Single-cell type
- neutrophils: 916 nCPM
- neutrophil progenitors: 221 nCPM
- monocytes: 174 nCPM
- kupffer cells: 135 nCPM
- macrophages: 123 nCPM
- monocyte progenitors: 118 nCPM
Immune cell
- neutrophil: 3 nTPM
- basophil: 1.7 nTPM
- eosinophil: 1.6 nTPM
- non-classical monocyte: 1 nTPM
- classical monocyte: 0.7 nTPM
- intermediate monocyte: 0.7 nTPM
Brain region
- cerebellum: 8.6 nTPM
- medulla oblongata: 7.8 nTPM
- midbrain: 7.8 nTPM
- thalamus: 7.6 nTPM
- cerebral cortex: 7 nTPM
- hypothalamus: 7 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)
- 0.33
- gnomAD pLI
- 0.96
- gnomAD missense Z
- 0.77
- 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
- inositol phosphate biosynthetic process
- inositol phosphate metabolic process
- inositol trisphosphate metabolic process
- necroptotic process
- phosphatidylinositol metabolic process
Molecular functions
- 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity
- ATP binding
- flavonoid binding
- inositol-1,3,4,5-tetrakisphosphate 6-kinase activity
- inositol-1,4,5-trisphosphate 3-kinase activity
- metal ion binding
- inositol tetrakisphosphate kinase activity
- inositol-1,3,4,6-tetrakisphosphate 5-kinase activity
- inositol-1,4,5,6-tetrakisphosphate 3-kinase activity
- inositol-1,4,5-trisphosphate 6-kinase activity
Cellular components
Protein domainsUniProt · Pfam · InterPro
KeywordsUniProt
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads IPMK as an antibody target. Whether an autoantibody or antibody against IPMK could matter depends on whether native IPMK is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
IPMK 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 IPMK as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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