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 QYANLocalizationUniProt · 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
- Sterile alpha motif domain
- Mbt repeat domain
- Sterile alpha motif/pointed domain superfamily
- SLED domain
- Scm-like with four MBT domains protein 1/2, SAM domain
- SLED domain superfamily
- Polycomb group and chromatin remodeling factors
- SAM domain (Sterile alpha motif)
- mbt repeat
- SLED domain
- Scm-like with four MBT domains protein 2, first MBT repeat
- Scm-like with four MBT domains protein 2, third MBT repeat
- Scm-like with four MBT domains protein 2, fourth MBT repeat
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.
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