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 RGTLocalizationUniProt · 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.
- Neuronopathy, distal hereditary motor, autosomal recessive 1 (HMNR1) MIM:604320
- Charcot-Marie-Tooth disease, axonal, type 2S (CMT2S) MIM:616155
Disease | GeneticClinVar
169 pathogenic / likely-pathogenic of 1,525 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Autosomal recessive distal spinal muscular atrophy 1
- Charcot-Marie-Tooth disease axonal type 2S
- Distal spinal muscular atrophy
- Neuronopathy, distal hereditary motor, autosomal dominant
- Inborn genetic diseases
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
- 5'-3' DNA helicase activity
- 5'-3' RNA helicase activity
- ATP binding
- ATP hydrolysis activity
- ATP-dependent activity, acting on DNA
- ATP-dependent activity, acting on RNA
- DNA binding
- DNA helicase activity
- double-stranded DNA helicase activity
- general transcription initiation factor binding
- identical protein binding
- ribosome binding
- RNA binding
- single-stranded DNA binding
- single-stranded RNA binding
- tRNA binding
- zinc ion binding
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Zinc finger, AN1-type
- R3H domain
- AAA+ ATPase domain
- Helicase superfamily 1/2, ATP-binding domain
- P-loop containing nucleoside triphosphate hydrolase
- AN1-like Zinc finger
- R3H domain superfamily
- DNA2/NAM7 helicase, helicase domain
- DNA2/NAM7 helicase-like, C-terminal
- Upf1-like, C-terminal helicase domain
- Coronaviruses polyprotein 1ab
- R3H domain
- AN1-like Zinc finger
- AAA domain
- AAA domain
- Helicase SMUBP-2/Hcs1-like
- DNA-binding protein SMUBP-2, R3H domain
- Helicase SMUBP-2/HCS1, 1B domain
- Helicase SMUBP-2/HCS1, 1B domain
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.
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