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Aliases for SMPX Gene

Aliases for SMPX Gene

  • Small Muscle Protein, X-Linked 2 3 5
  • Stretch-Responsive Skeletal Muscle Protein 3 4
  • Deafness, X-Linked 6, Sensorineural 2 3
  • DFNX4 3
  • DFN6 3
  • SRMX 4

External Ids for SMPX Gene

Previous HGNC Symbols for SMPX Gene

  • DFN6

Previous GeneCards Identifiers for SMPX Gene

  • GC0XM020298
  • GC0XM020922
  • GC0XM021085
  • GC0XM021483
  • GC0XM019465

Summaries for SMPX Gene

Entrez Gene Summary for SMPX Gene

  • This gene encodes a small protein that has no known functional domains. Mutations in this gene are a cause of X-linked deafness-4, and the encoded protein may play a role in the maintenance of inner ear cells subjected to mechanical stress. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Dec 2011]

GeneCards Summary for SMPX Gene

SMPX (Small Muscle Protein, X-Linked) is a Protein Coding gene. Diseases associated with SMPX include Deafness, X-Linked 4 and X-Linked Non-Syndromic Sensorineural Deafness Type Dfn.

UniProtKB/Swiss-Prot for SMPX Gene

  • Plays a role in the regulatory network through which muscle cells coordinate their structural and functional states during growth, adaptation, and repair.

No data available for Tocris Summary , Gene Wiki entry , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for SMPX Gene

Genomics for SMPX Gene

Regulatory Elements for SMPX Gene

Enhancers for SMPX Gene
GeneHancer Identifier Score Enhancer Sources TSS distance (kb) Number of Genes Away Size (kb) Transcription Factor Binding Sites within enhancer Other Gene Targets for Enhancer

Enhancers around SMPX on UCSC Golden Path with GeneCards custom track

Promoters for SMPX Gene
Ensembl Regulatory Elements (ENSRs) TSS Distance (bp) Size (bp) Binding Sites for Transcription Factors within promoters

ENSRs around SMPX on UCSC Golden Path with GeneCards custom track

Genomic Location for SMPX Gene

21,705,972 bp from pter
21,758,163 bp from pter
52,192 bases
Minus strand

Genomic View for SMPX Gene

Genes around SMPX on UCSC Golden Path with GeneCards custom track

Cytogenetic band:
SMPX Gene in genomic location: bands according to Ensembl, locations according to GeneLoc (and/or Entrez Gene and/or Ensembl if different)
Genomic Location for SMPX Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for SMPX Gene

Proteins for SMPX Gene

  • Protein details for SMPX Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Small muscular protein
    Protein Accession:
    Secondary Accessions:
    • B1AWX2

    Protein attributes for SMPX Gene

    88 amino acids
    Molecular mass:
    9559 Da
    Quaternary structure:
    No Data Available

neXtProt entry for SMPX Gene

Proteomics data for SMPX Gene at MOPED

Post-translational modifications for SMPX Gene

  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Other Protein References for SMPX Gene

ENSEMBL proteins:
REFSEQ proteins:

No data available for DME Specific Peptides for SMPX Gene

Domains & Families for SMPX Gene

Protein Domains for SMPX Gene


Suggested Antigen Peptide Sequences for SMPX Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the SMPX family.
  • Belongs to the SMPX family.
genes like me logo Genes that share domains with SMPX: view

No data available for Gene Families for SMPX Gene

Function for SMPX Gene

Molecular function for SMPX Gene

GENATLAS Biochemistry:
striated muscle protein X,expressed in muscle and heart
UniProtKB/Swiss-Prot Function:
Plays a role in the regulatory network through which muscle cells coordinate their structural and functional states during growth, adaptation, and repair.
genes like me logo Genes that share phenotypes with SMPX: view

Human Phenotype Ontology for SMPX Gene

HPO Id HPO Name Alternative Ids Definition Synonyms

Animal Models for SMPX Gene

MGI Knock Outs for SMPX:

Animal Model Products

No data available for Enzyme Numbers (IUBMB) , Gene Ontology (GO) - Molecular Function , miRNA , Transcription Factor Targets and HOMER Transcription for SMPX Gene

Localization for SMPX Gene

Subcellular locations from

Jensen Localization Image for SMPX Gene COMPARTMENTS Subcellular localization image for SMPX gene
Compartment Confidence
nucleus 3
mitochondrion 1

Gene Ontology (GO) - Cellular Components for SMPX Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005927 muscle tendon junction IEA,IBA --
GO:0031430 M band IEA,IBA --
GO:0043034 costamere IEA,IBA --
GO:0043292 contractile fiber IEA --
genes like me logo Genes that share ontologies with SMPX: view

No data available for Subcellular locations from UniProtKB/Swiss-Prot for SMPX Gene

Pathways & Interactions for SMPX Gene

SuperPathways for SMPX Gene

No Data Available

Interacting Proteins for SMPX Gene

Gene Ontology (GO) - Biological Process for SMPX Gene


No data available for Pathways by source and SIGNOR curated interactions for SMPX Gene

Drugs & Compounds for SMPX Gene

(1) Additional Compounds for SMPX Gene - From: Novoseek

Name Synonyms Role CAS Number PubChem IDs PubMed IDs
genes like me logo Genes that share compounds with SMPX: view

Transcripts for SMPX Gene

mRNA/cDNA for SMPX Gene

Unigene Clusters for SMPX Gene

Small muscle protein, X-linked:
Representative Sequences:

Alternative Splicing Database (ASD) splice patterns (SP) for SMPX Gene

No ASD Table

Relevant External Links for SMPX Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for SMPX Gene

mRNA expression in normal human tissues for SMPX Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for SMPX Gene

This gene is overexpressed in Heart - Left Ventricle (x21.5), Muscle - Skeletal (x14.2), and Heart - Atrial Appendage (x13.1).

Protein differential expression in normal tissues from HIPED for SMPX Gene

This gene is overexpressed in Tonsil (27.0), Heart (15.2), Fetal heart (12.4), and Oral epithelium (8.1).

Integrated Proteomics: protein expression in normal tissues and cell lines from ProteomicsDB and MOPED for SMPX Gene

SOURCE GeneReport for Unigene cluster for SMPX Gene Hs.86492

mRNA Expression by UniProt/SwissProt for SMPX Gene

Tissue specificity: Preferentially and abundantly expressed in heart and skeletal muscle.
genes like me logo Genes that share expression patterns with SMPX: view

Protein tissue co-expression partners for SMPX Gene

- Elite partner

Primer Products

Orthologs for SMPX Gene

This gene was present in the common ancestor of chordates.

Orthologs for SMPX Gene

Organism Taxonomy Gene Similarity Type Details
(Bos Taurus)
Mammalia SMPX 35
  • 93.02 (n)
  • 97.67 (a)
  • 98 (a)
(Canis familiaris)
Mammalia SMPX 35
  • 91.09 (n)
  • 96.51 (a)
  • 95 (a)
(Mus musculus)
Mammalia Smpx 35
  • 83.53 (n)
  • 85.88 (a)
Smpx 16
Smpx 36
  • 86 (a)
(Pan troglodytes)
Mammalia SMPX 35
  • 100 (n)
  • 100 (a)
  • 100 (a)
(Rattus norvegicus)
Mammalia Smpx 35
  • 80 (n)
  • 82.35 (a)
(Monodelphis domestica)
Mammalia SMPX 36
  • 84 (a)
(Ornithorhynchus anatinus)
Mammalia SMPX 36
  • 86 (a)
(Gallus gallus)
Aves SMPX 35
  • 76.74 (n)
  • 81.4 (a)
  • 80 (a)
(Anolis carolinensis)
Reptilia SMPX 36
  • 77 (a)
tropical clawed frog
(Silurana tropicalis)
Amphibia smpx 35
  • 75.69 (n)
  • 78.82 (a)
African clawed frog
(Xenopus laevis)
Amphibia MGC64235 35
(Danio rerio)
Actinopterygii smpx 35
  • 67.89 (n)
  • 71.95 (a)
smpx 36
  • 70 (a)
rainbow trout
(Oncorhynchus mykiss)
Actinopterygii Omy.8500 35
Species with no ortholog for SMPX:
  • A. gosspyii yeast (Ashbya gossypii)
  • Actinobacteria (Mycobacterium tuberculosis)
  • African malaria mosquito (Anopheles gambiae)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • baker's yeast (Saccharomyces cerevisiae)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • bread mold (Neurospora crassa)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • fission yeast (Schizosaccharomyces pombe)
  • fruit fly (Drosophila melanogaster)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • K. lactis yeast (Kluyveromyces lactis)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea squirt (Ciona intestinalis)
  • sea squirt (Ciona savignyi)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • thale cress (Arabidopsis thaliana)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • wheat (Triticum aestivum)
  • worm (Caenorhabditis elegans)

Evolution for SMPX Gene

Gene Tree for SMPX (if available)
Gene Tree for SMPX (if available)

Paralogs for SMPX Gene

No data available for Paralogs for SMPX Gene

Variants for SMPX Gene

Sequence variations from dbSNP and Humsavar for SMPX Gene

SNP ID Clin Chr 0X pos Sequence Context AA Info Type
rs747722598 -- 21,726,088(+) CCTAT(G/T)TATAG intron-variant
rs747765148 -- 21,736,380(+) GAGGA(A/G)GGGAT intron-variant
rs747818251 -- 21,735,321(+) GACTG(A/T)ACTCA intron-variant
rs747879430 -- 21,741,812(+) CCCTG(A/G)GGTCT intron-variant
rs747900931 -- 21,750,970(+) TGGAC(A/T)AAAGG intron-variant

Variation tolerance for SMPX Gene

Residual Variation Intolerance Score: 60.9% of all genes are more intolerant (likely to be disease-causing)
Gene Damage Index Score: 0.10; 2.23% of all genes are more intolerant (likely to be disease-causing)

Relevant External Links for SMPX Gene

Human Gene Mutation Database (HGMD)

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot and Structural Variations from Database of Genomic Variants (DGV) for SMPX Gene

Disorders for SMPX Gene

MalaCards: The human disease database

(4) MalaCards diseases for SMPX Gene - From: OMIM, ClinVar, GeneTests, Orphanet, and GeneCards

Disorder Aliases PubMed IDs
deafness, x-linked 4
  • dfn6
x-linked non-syndromic sensorineural deafness type dfn
  • x-linked isolated neurosensory deafness type dfn
dfnx4 nonsyndromic hearing loss and deafness
  • deafness, x-linked 4
deafness, x-linked 6
  • dfnx6
- elite association - COSMIC cancer census association via MalaCards
Search SMPX in MalaCards View complete list of genes associated with diseases


  • Deafness, X-linked, 4 (DFNX4) [MIM:300066]: A non-syndromic form of sensorineural, progressive hearing loss with postlingual onset. In affected males, the auditory impairment affects initially high-frequency hearing. It later evolves to become severe to profound and affects all frequencies. Carrier females manifest moderate hearing impairment in the high frequencies. {ECO:0000269 PubMed:21549336, ECO:0000269 PubMed:21549342, ECO:0000269 PubMed:22911656}. Note=The disease is caused by mutations affecting the gene represented in this entry.

Relevant External Links for SMPX

Atlas of Genetics and Cytogenetics in Oncology and Haematology:
genes like me logo Genes that share disorders with SMPX: view

No data available for Genatlas for SMPX Gene

Publications for SMPX Gene

  1. Identification, mapping, and genomic structure of a novel X- chromosomal human gene (SMPX) encoding a small muscular protein. (PMID: 10598820) Patzak D. … Wehnert M. (Hum. Genet. 1999) 3 4 23 67
  2. Variable degrees of hearing impairment in a Dutch DFNX4 (DFN6) family. (PMID: 21893181) Weegerink N.J. … Kunst H.P. (Hear. Res. 2011) 2 3
  3. Identification of a novel stretch-responsive skeletal muscle gene (Smpx). (PMID: 11401441) Kemp T.J. … Coulton G.R. (Genomics 2001) 3 23
  4. X-linked hearing loss: two gene mutation examples provide generalizable implications for clinical care. (PMID: 24687041) Stanton S.G. … Abdelfatah N. (Am J Audiol 2014) 3
  5. Overexpression of SMPX in adult skeletal muscle does not change skeletal muscle fiber type or size. (PMID: 24936977) EftestA … Bruusgaard J.C. (PLoS ONE 2014) 3

Products for SMPX Gene

Sources for SMPX Gene