Seroatlas · Human Serome Atlas

IGHMBP2

DNA-binding protein SMUBP-2

Also known as: CATF1, CMT2S, HCSA, HMN6, SMARD1, SMBP2_HUMAN, SMUBP2, ZFAND7

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

Protein identityUniProt · HPA

UniProt accession
P38935
Gene
IGHMBP2
Ensembl
ENSG00000132740
Chromosome
11
Canonical length
993 aa
Protein class
Disease related genes, Enzymes, Human disease related genes, Potential drug targets, Predicted intracellular proteins
Subcellular location
Nucleoplasm,Nuclear bodies,Cytosol
Quaternary structure
Homooligomer

OverviewNCBI Gene

This gene encodes a helicase superfamily member that binds a specific DNA sequence from the immunoglobulin mu chain switch region. Mutations in this gene lead to spinal muscle atrophy with respiratory distress type 1. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

993 residues, UniProt reviewed canonical sequence.

>P38935|IGHMBP2
     1  MASAAVESFV TKQLDLLELE RDAEVEERRS WQENISLKEL QSRGVCLLKL QVSSQRTGLY
    61  GRLLVTFEPR RYGSAAALPS NSFTSGDIVG LYDAANEGSQ LATGILTRVT QKSVTVAFDE
   121  SHDFQLSLDR ENSYRLLKLA NDVTYRRLKK ALIALKKYHS GPASSLIEVL FGRSAPSPAS
   181  EIHPLTFFNT CLDTSQKEAV LFALSQKELA IIHGPPGTGK TTTVVEIILQ AVKQGLKVLC
   241  CAPSNIAVDN LVERLALCKQ RILRLGHPAR LLESIQQHSL DAVLARSDSA QIVADIRKDI
   301  DQVFVKNKKT QDKREKSNFR NEIKLLRKEL KEREEAAMLE SLTSANVVLA TNTGASADGP
   361  LKLLPESYFD VVVIDECAQA LEASCWIPLL KARKCILAGD HKQLPPTTVS HKAALAGLSL
   421  SLMERLAEEY GARVVRTLTV QYRMHQAIMR WASDTMYLGQ LTAHSSVARH LLRDLPGVAA
   481  TEETGVPLLL VDTAGCGLFE LEEEDEQSKG NPGEVRLVSL HIQALVDAGV PARDIAVVSP
   541  YNLQVDLLRQ SLVHRHPELE IKSVDGFQGR EKEAVILSFV RSNRKGEVGF LAEDRRINVA
   601  VTRARRHVAV ICDSRTVNNH AFLKTLVEYF TQHGEVRTAF EYLDDIVPEN YSHENSQGSS
   661  HAATKPQGPA TSTRTGSQRQ EGGQEAAAPA RQGRKKPAGK SLASEAPSQP SLNGGSPEGV
   721  ESQDGVDHFR AMIVEFMASK KMQLEFPPSL NSHDRLRVHQ IAEEHGLRHD SSGEGKRRFI
   781  TVSKRAPRPR AALGPPAGTG GPAPLQPVPP TPAQTEQPPR EQRGPDQPDL RTLHLERLQR
   841  VRSAQGQPAS KEQQASGQQK LPEKKKKKAK GHPATDLPTE EDFEALVSAA VKADNTCGFA
   901  KCTAGVTTLG QFCQLCSRRY CLSHHLPEIH GCGERARAHA RQRISREGVL YAGSGTKNGS
   961  LDPAKRAQLQ RRLDKKLSEL SNQRTSRRKE RGT

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against IGHMBP2 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)
0.35
Highest tissue expression
13 nTPM

Expression across tissuesHPA

Tissue

  • testis: 13 nTPM
  • cerebellum: 8.1 nTPM
  • colon: 6.9 nTPM
  • skeletal muscle: 6.8 nTPM
  • salivary gland: 6 nTPM
  • blood vessel: 5.7 nTPM

Single-cell type

  • late primary spermatocytes: 120 nCPM
  • early spermatids: 89 nCPM
  • late spermatids: 60 nCPM
  • adrenal medulla cells: 43 nCPM
  • neutrophils: 31 nCPM
  • epicardial cells: 27 nCPM

Immune cell

  • classical monocyte: 2 nTPM
  • intermediate monocyte: 1.8 nTPM
  • myeloid DC: 1.8 nTPM
  • gdT-cell: 1.5 nTPM
  • MAIT T-cell: 1.3 nTPM
  • total PBMC: 1.3 nTPM

Brain region

  • cerebral cortex: 5.7 nTPM
  • basal ganglia: 5.1 nTPM
  • hypothalamus: 5 nTPM
  • white matter: 4.8 nTPM
  • medulla oblongata: 4.2 nTPM
  • cerebellum: 4.1 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about IGHMBP2.

Disease | AllUniProt

Conditions IGHMBP2 is implicated in, by any mechanism.

Disease | GeneticClinVar

169 pathogenic / likely-pathogenic of 1,525 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)
0.95
gnomAD pLI
0
gnomAD missense Z
0.18
DepMap mean gene effect
-0.18
DepMap dependency class
selective

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

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

InteractionsUniProt · HPA

Protein binding partners of IGHMBP2 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 IGHMBP2 as an antibody target. Whether an autoantibody or antibody against IGHMBP2 could matter depends on whether native IGHMBP2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

IGHMBP2 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 IGHMBP2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/IGHMBP2. 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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