Seroatlas · Human Serome Atlas

SFMBT2

Scm-like with four MBT domains protein 2

Also known as: KIAA1617, SMBT2_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
Q5VUG0
Gene
SFMBT2
Ensembl
ENSG00000198879
Chromosome
10
Canonical length
894 aa
Protein class
Predicted intracellular proteins
Subcellular location
Nucleoplasm,Nuclear speckles

OverviewNCBI Gene

Enables histone binding activity. Involved in negative regulation of gene expression. Located in aggresome; cytosol; and nuclear speck. [provided by Alliance of Genome Resources, Jul 2025]

Canonical amino-acid sequenceUniProt

894 residues, UniProt reviewed canonical sequence.

>Q5VUG0|SFMBT2
     1  MESTLSASNM QDPSSSPLEK CLGSANGNGD LDSEEGSSLE ETGFNWGEYL EETGASAAPH
    61  TSFKHVEISI QSNFQPGMKL EVANKNNPDT YWVATIITTC GQLLLLRYCG YGEDRRADFW
   121  CDVVIADLHP VGWCTQNNKV LMPPDAIKEK YTDWTEFLIR DLTGSRTAPA NLLEGPLRGK
   181  GPIDLITVGS LIELQDSQNP FQYWIVSVIE NVGGRLRLRY VGLEDTESYD QWLFYLDYRL
   241  RPVGWCQENK YRMDPPSEIY PLKMASEWKC TLEKSLIDAA KFPLPMEVFK DHADLRSHFF
   301  TVGMKLETVN MCEPFYISPA SVTKVFNNHF FQVTIDDLRP EPSKLSMLCH ADSLGILPVQ
   361  WCLKNGVSLT PPKGYSGQDF DWADYHKQHG AQEAPPFCFR NTSFSRGFTK NMKLEAVNPR
   421  NPGELCVASV VSVKGRLMWL HLEGLQTPVP EVIVDVESMD IFPVGWCEAN SYPLTAPHKT
   481  VSQKKRKIAV VQPEKQLPPT VPVKKIPHDL CLFPHLDTTG TVNGKYCCPQ LFINHRCFSG
   541  PYLNKGRIAE LPQSVGPGKC VLVLKEVLSM IINAAYKPGR VLRELQLVED PHWNFQEETL
   601  KAKYRGKTYR AVVKIVRTSD QVANFCRRVC AKLECCPNLF SPVLISENCP ENCSIHTKTK
   661  YTYYYGKRKK ISKPPIGESN PDSGHPKPAR RRKRRKSIFV QKKRRSSAVD FTAGSGEESE
   721  EEDADAMDDD TASEETGSEL RDDQTDTSSA EVPSARPRRA VTLRSGSEPV RRPPPERTRR
   781  GRGAPAASSA EEGEKCPPTK PEGTEDTKQE EEERLVLESN PLEWTVTDVV RFIKLTDCAP
   841  LAKIFQEQDI DGQALLLLTL PTVQECMELK LGPAIKLCHQ IERVKVAFYA QYAN

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against SFMBT2 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
16 nTPM

Expression across tissuesHPA

Tissue

  • retina: 16 nTPM
  • spleen: 8.5 nTPM
  • ovary: 7.1 nTPM
  • spinal cord: 7 nTPM
  • lymph node: 6.8 nTPM
  • pituitary gland: 6.2 nTPM

Single-cell type

  • microglia: 2,870 nCPM
  • pituicytes/fscs: 1,480 nCPM
  • podocytes: 1,001 nCPM
  • cone photoreceptor cells: 998 nCPM
  • rod photoreceptor cells: 814 nCPM
  • prostatic glandular cells: 564 nCPM

Immune cell

  • non-classical monocyte: 4.6 nTPM
  • plasmacytoid DC: 2.4 nTPM
  • intermediate monocyte: 2.3 nTPM
  • NK-cell: 0.8 nTPM
  • eosinophil: 0.7 nTPM
  • naive CD8 T-cell: 0.6 nTPM

Brain region

  • thalamus: 53 nTPM
  • medulla oblongata: 43 nTPM
  • white matter: 38 nTPM
  • cerebral cortex: 37 nTPM
  • hypothalamus: 37 nTPM
  • midbrain: 36 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)
0.25
gnomAD pLI
1
gnomAD missense Z
1.28
DepMap mean gene effect
-0.03
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

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

InteractionsUniProt · HPA

Protein binding partners of SFMBT2 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 SFMBT2 as an antibody target. Whether an autoantibody or antibody against SFMBT2 could matter depends on whether native SFMBT2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

SFMBT2 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 SFMBT2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/SFMBT2. 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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