Seroatlas · Human Serome Atlas

NFKBIZ

NF-kappa-B inhibitor zeta

Also known as: FLJ34463, IKBZ_HUMAN, INAP, MAIL

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

Protein identityUniProt · HPA

UniProt accession
Q9BYH8
Gene
NFKBIZ
Ensembl
ENSG00000144802
Chromosome
3
Canonical length
718 aa
Protein class
Predicted intracellular proteins, Transcription factors
Subcellular location
Nuclear speckles,Cytoplasmic bodies

OverviewNCBI Gene

This gene is a member of the ankyrin-repeat family and is induced by lipopolysaccharide (LPS). The C-terminal portion of the encoded product which contains the ankyrin repeats, shares high sequence similarity with the I kappa B family of proteins. The latter are known to play a role in inflammatory responses to LPS by their interaction with NF-B proteins through ankyrin-repeat domains. Studies in mouse indicate that this gene product is one of the nuclear I kappa B proteins and an activator of IL-6 production. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

718 residues, UniProt reviewed canonical sequence.

>Q9BYH8|NFKBIZ
     1  MIVDKLLDDS RGGEGLRDAA GGCGLMTSPL NLSYFYGASP PAAAPGACDA SCSVLGPSAP
    61  GSPGSDSSDF SSASSVSSCG AVESRSRGGA RAERQPVEPH MGVGRQQRGP FQGVRVKNSV
   121  KELLLHIRSH KQKASGQAVD DFKTQGVNIE QFRELKNTVS YSGKRKGPDS LSDGPACKRP
   181  ALLHSQFLTP PQTPTPGESM EDVHLNEPKQ ESSADLLQNI INIKNECSPV SLNTVQVSWL
   241  NPVVVPQSSP AEQCQDFHGG QVFSPPQKCQ PFQVRGSQQM IDQASLYQYS PQNQHVEQQP
   301  HYTHKPTLEY SPFPIPPQSP AYEPNLFDGP ESQFCPNQSL VSLLGDQRES ENIANPMQTS
   361  SSVQQQNDAH LHSFSMMPSS ACEAMVGHEM ASDSSNTSLP FSNMGNPMNT TQLGKSLFQW
   421  QVEQEESKLA NISQDQFLSK DADGDTFLHI AVAQGRRALS YVLARKMNAL HMLDIKEHNG
   481  QSAFQVAVAA NQHLIVQDLV NIGAQVNTTD CWGRTPLHVC AEKGHSQVLQ AIQKGAVGSN
   541  QFVDLEATNY DGLTPLHCAV IAHNAVVHEL QRNQQPHSPE VQELLLKNKS LVDTIKCLIQ
   601  MGAAVEAKDR KSGRTALHLA AEEANLELIR LFLELPSCLS FVNAKAYNGN TALHVAASLQ
   661  YRLTQLDAVR LLMRKGADPS TRNLENEQPV HLVPDGPVGE QIRRILKGKS IQQRAPPY

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against NFKBIZ 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)
0.51
Highest tissue expression
384 nTPM

Expression across tissuesHPA

Tissue

  • bone marrow: 384 nTPM
  • salivary gland: 76 nTPM
  • urinary bladder: 67 nTPM
  • adipose tissue: 54 nTPM
  • smooth muscle: 51 nTPM
  • liver: 50 nTPM

Single-cell type

  • neutrophils: 3,464 nCPM
  • mast cells: 805 nCPM
  • monocytes: 803 nCPM
  • lacrimal acinar cells: 707 nCPM
  • hematopoietic stem cells: 664 nCPM
  • monocyte progenitors: 651 nCPM

Immune cell

  • non-classical monocyte: 34 nTPM
  • neutrophil: 25 nTPM
  • intermediate monocyte: 13 nTPM
  • basophil: 12 nTPM
  • naive CD4 T-cell: 6 nTPM
  • plasmacytoid DC: 6 nTPM

Brain region

  • choroid plexus: 44 nTPM
  • thalamus: 19 nTPM
  • medulla oblongata: 18 nTPM
  • spinal cord: 17 nTPM
  • cerebral cortex: 17 nTPM
  • pons: 16 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)
0.19
gnomAD pLI
1
gnomAD missense Z
1.18
DepMap mean gene effect
-0.01
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 NFKBIZ 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 NFKBIZ as an antibody target. Whether an autoantibody or antibody against NFKBIZ could matter depends on whether native NFKBIZ is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

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

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