Seroatlas · Human Serome Atlas

NAIP

Baculoviral IAP repeat-containing protein 1

Also known as: BIRC1, BIRC1_HUMAN, NLRB1

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

Protein identityUniProt · HPA

UniProt accession
Q13075
Gene
NAIP
Ensembl
ENSG00000249437
Chromosome
5
Canonical length
1403 aa
Protein class
Cancer-related genes, Predicted intracellular proteins

OverviewNCBI Gene

This gene is part of a 500 kb inverted duplication on chromosome 5q13. This duplicated region contains at least four genes and repetitive elements which make it prone to rearrangements and deletions. The repetitiveness and complexity of the sequence have also caused difficulty in determining the organization of this genomic region. This copy of the gene is full length; additional copies with truncations and internal deletions are also present in this region of chromosome 5q13. It is thought that this gene is a modifier of spinal muscular atrophy caused by mutations in a neighboring gene, SMN1. The protein encoded by this gene contains regions of homology to two baculovirus inhibitor of apoptosis proteins, and it is able to suppress apoptosis induced by various signals. Alternative splicing and the use of alternative promoters results in multiple transcript variants. [provided by RefSeq, Nov 2016]

Canonical amino-acid sequenceUniProt

1403 residues, UniProt reviewed canonical sequence.

>Q13075|NAIP
     1  MATQQKASDE RISQFDHNLL PELSALLGLD AVQLAKELEE EEQKERAKMQ KGYNSQMRSE
    61  AKRLKTFVTY EPYSSWIPQE MAAAGFYFTG VKSGIQCFCC SLILFGAGLT RLPIEDHKRF
   121  HPDCGFLLNK DVGNIAKYDI RVKNLKSRLR GGKMRYQEEE ARLASFRNWP FYVQGISPCV
   181  LSEAGFVFTG KQDTVQCFSC GGCLGNWEEG DDPWKEHAKW FPKCEFLRSK KSSEEITQYI
   241  QSYKGFVDIT GEHFVNSWVQ RELPMASAYC NDSIFAYEEL RLDSFKDWPR ESAVGVAALA
   301  KAGLFYTGIK DIVQCFSCGG CLEKWQEGDD PLDDHTRCFP NCPFLQNMKS SAEVTPDLQS
   361  RGELCELLET TSESNLEDSI AVGPIVPEMA QGEAQWFQEA KNLNEQLRAA YTSASFRHMS
   421  LLDISSDLAT DHLLGCDLSI ASKHISKPVQ EPLVLPEVFG NLNSVMCVEG EAGSGKTVLL
   481  KKIAFLWASG CCPLLNRFQL VFYLSLSSTR PDEGLASIIC DQLLEKEGSV TEMCVRNIIQ
   541  QLKNQVLFLL DDYKEICSIP QVIGKLIQKN HLSRTCLLIA VRTNRARDIR RYLETILEIK
   601  AFPFYNTVCI LRKLFSHNMT RLRKFMVYFG KNQSLQKIQK TPLFVAAICA HWFQYPFDPS
   661  FDDVAVFKSY MERLSLRNKA TAEILKATVS SCGELALKGF FSCCFEFNDD DLAEAGVDED
   721  EDLTMCLMSK FTAQRLRPFY RFLSPAFQEF LAGMRLIELL DSDRQEHQDL GLYHLKQINS
   781  PMMTVSAYNN FLNYVSSLPS TKAGPKIVSH LLHLVDNKES LENISENDDY LKHQPEISLQ
   841  MQLLRGLWQI CPQAYFSMVS EHLLVLALKT AYQSNTVAAC SPFVLQFLQG RTLTLGALNL
   901  QYFFDHPESL SLLRSIHFPI RGNKTSPRAH FSVLETCFDK SQVPTIDQDY ASAFEPMNEW
   961  ERNLAEKEDN VKSYMDMQRR ASPDLSTGYW KLSPKQYKIP CLEVDVNDID VVGQDMLEIL
  1021  MTVFSASQRI ELHLNHSRGF IESIRPALEL SKASVTKCSI SKLELSAAEQ ELLLTLPSLE
  1081  SLEVSGTIQS QDQIFPNLDK FLCLKELSVD LEGNINVFSV IPEEFPNFHH MEKLLIQISA
  1141  EYDPSKLVKL IQNSPNLHVF HLKCNFFSDF GSLMTMLVSC KKLTEIKFSD SFFQAVPFVA
  1201  SLPNFISLKI LNLEGQQFPD EETSEKFAYI LGSLSNLEEL ILPTGDGIYR VAKLIIQQCQ
  1261  QLHCLRVLSF FKTLNDDSVV EIAKVAISGG FQKLENLKLS INHKITEEGY RNFFQALDNM
  1321  PNLQELDISR HFTECIKAQA TTVKSLSQCV LRLPRLIRLN MLSWLLDADD IALLNVMKER
  1381  HPQSKYLTIL QKWILPFSPI IQK

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against NAIP 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
Cell surface
Secreted
No
Transmembrane segments
0
Mean surface accessibility (rSASA)
0.25
Highest tissue expression
31 nTPM

Expression across tissuesHPA

Tissue

  • spleen: 31 nTPM
  • spinal cord: 8 nTPM
  • lung: 6.8 nTPM
  • midbrain: 6.3 nTPM
  • adipose tissue: 5.3 nTPM
  • hippocampal formation: 4.6 nTPM

Single-cell type

  • distal convoluted tubule cells: 167 nCPM
  • loop of henle epithelial cells: 133 nCPM
  • renal connecting tubule cells: 109 nCPM
  • podocytes: 99 nCPM
  • renal collecting duct intercalated cells: 97 nCPM
  • proximal tubule cells: 80 nCPM

Immune cell

  • classical monocyte: 8.3 nTPM
  • myeloid DC: 5.2 nTPM
  • neutrophil: 4.5 nTPM
  • total PBMC: 2.5 nTPM
  • intermediate monocyte: 2 nTPM
  • non-classical monocyte: 0.5 nTPM

Brain region

  • cerebellum: 6.8 nTPM
  • thalamus: 6.1 nTPM
  • choroid plexus: 5.5 nTPM
  • basal ganglia: 5.4 nTPM
  • medulla oblongata: 5.4 nTPM
  • cerebral cortex: 5.3 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about NAIP.

Disease | ImmuneIEDB

Conditions an epitope on NAIP was assayed in.

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)
1.31
gnomAD pLI
0
gnomAD missense Z
0.41

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% 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 NAIP as an antibody target. Whether an autoantibody or antibody against NAIP could matter depends on whether native NAIP is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

NAIP is annotated at the cell surface, where native NAIP is exposed to circulating antibodies and is a prime autoantibody target that could block, deplete, or overstimulate it.

Annotation status

The present source text does not explicitly label NAIP as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

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