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Aliases for TTPA Gene

Aliases for TTPA Gene

  • Tocopherol (Alpha) Transfer Protein 2 3
  • Alpha-TTP 3 4
  • TTP1 3 6
  • AVED 3 6
  • Tocopherol (Alpha) Transfer Protein (Ataxia (Friedreich-Like) With Vitamin E Deficiency) 3
  • Ataxia (Friedreich-Like) With Vitamin E Deficiency 2
  • Alpha-Tocopherol Transfer Protein 3
  • AlphaTTP 3
  • ATTP 3
  • TPP1 4

External Ids for TTPA Gene

Previous HGNC Symbols for TTPA Gene

  • AVED

Previous GeneCards Identifiers for TTPA Gene

  • GC08M063337
  • GC08M063913
  • GC08M063695
  • GC08M064022
  • GC08M064134
  • GC08M059459
  • GC08M063961

Summaries for TTPA Gene

Entrez Gene Summary for TTPA Gene

  • This gene encodes a soluble protein that binds alpha-trocopherol, a form of vitamin E, with high selectivity and affinity. This protein plays an important role in regulating vitamin E levels in the body by transporting vitamin E between membrane vesicles and facilitating the secretion of vitamin E from hepatocytes to circulating lipoproteins. Mutations in this gene cause hereditary vitamin E deficiency (ataxia with vitamin E deficiency, AVED) and retinitis pigmentosa. [provided by RefSeq, Nov 2009]

GeneCards Summary for TTPA Gene

TTPA (Tocopherol (Alpha) Transfer Protein) is a Protein Coding gene. Diseases associated with TTPA include ataxia with isolated vitamin e deficiency and ataxia with vitamin e deficiency. Among its related pathways are Lysosome and Biosynthesis of the N-glycan precursor (dolichol lipid-linked oligosaccharide, LLO) and transfer to a nascent protein. GO annotations related to this gene include transporter activity and phosphatidylinositol-3,4-bisphosphate binding. An important paralog of this gene is CLVS1.

UniProtKB/Swiss-Prot for TTPA Gene

  • Binds alpha-tocopherol, enhances its transfer between separate membranes, and stimulates its release from liver cells (PubMed:7887897). Binds both phosphatidylinol 3,4-bisphosphate and phosphatidylinol 4,5-bisphosphate; the resulting conformation change is important for the release of the bound alpha-tocopherol (By similarity).

Gene Wiki entry for TTPA Gene

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

Genomics for TTPA Gene

Regulatory Elements for TTPA Gene

Epigenetics Products

  • DNA Methylation CpG Assay Predesigned for Pyrosequencing in human,mouse,rat

Genomic Location for TTPA Gene

63,048,553 bp from pter
63,086,098 bp from pter
37,546 bases
Minus strand

Genomic View for TTPA Gene

UCSC Golden Path with GeneCards custom track
Cytogenetic band:
Genomic Location for TTPA Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for TTPA Gene

Proteins for TTPA Gene

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

    Protein Symbol:
    Recommended name:
    Alpha-tocopherol transfer protein
    Protein Accession:
    Secondary Accessions:
    • Q71V64

    Protein attributes for TTPA Gene

    278 amino acids
    Molecular mass:
    31750 Da
    Quaternary structure:
    • Monomer and homotetramer. Phosphatidylinol 4,5-bisphosphate binding induces the formation of homotetramers. Phosphatidylinol 3,4-bisphosphate is less efficient in inducing tetramerization (By similarity).

    Three dimensional structures from OCA and Proteopedia for TTPA Gene

neXtProt entry for TTPA Gene

Proteomics data for TTPA Gene at MOPED

Post-translational modifications for TTPA Gene

  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Other Protein References for TTPA Gene

ENSEMBL proteins:
REFSEQ proteins:

No data available for DME Specific Peptides for TTPA Gene

Domains for TTPA Gene

Suggested Antigen Peptide Sequences for TTPA Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • P49638
  • Contains 1 CRAL-TRIO domain.
genes like me logo Genes that share domains with TTPA: view

No data available for Gene Families for TTPA Gene

Function for TTPA Gene

Molecular function for TTPA Gene

GENATLAS Biochemistry: alpha-tocopherol transfer protein
UniProtKB/Swiss-Prot Function: Binds alpha-tocopherol, enhances its transfer between separate membranes, and stimulates its release from liver cells (PubMed:7887897). Binds both phosphatidylinol 3,4-bisphosphate and phosphatidylinol 4,5-bisphosphate; the resulting conformation change is important for the release of the bound alpha-tocopherol (By similarity).

Gene Ontology (GO) - Molecular Function for TTPA Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005215 transporter activity IEA --
GO:0005515 protein binding IPI 25416956
GO:0005546 phosphatidylinositol-4,5-bisphosphate binding ISS --
GO:0008431 vitamin E binding ISS --
GO:0019842 vitamin binding --
genes like me logo Genes that share ontologies with TTPA: view
genes like me logo Genes that share phenotypes with TTPA: view

Animal Models for TTPA Gene

MGI Knock Outs for TTPA:

Animal Model Products

CRISPR Products

miRNA for TTPA Gene

miRTarBase miRNAs that target TTPA

No data available for Enzyme Numbers (IUBMB) , Transcription Factor Targeting and HOMER Transcription for TTPA Gene

Localization for TTPA Gene

Subcellular locations from UniProtKB/Swiss-Prot for TTPA Gene


Subcellular locations from

Jensen Localization Image for TTPA Gene COMPARTMENTS Subcellular localization image for TTPA gene
Compartment Confidence
cytosol 3
endosome 2
nucleus 2
extracellular 1
golgi apparatus 1
plasma membrane 1

Gene Ontology (GO) - Cellular Components for TTPA Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005770 late endosome IEA --
GO:0005829 cytosol IEA --
genes like me logo Genes that share ontologies with TTPA: view

Pathways for TTPA Gene

genes like me logo Genes that share pathways with TTPA: view

Pathways by source for TTPA Gene

Gene Ontology (GO) - Biological Process for TTPA Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0001890 placenta development --
GO:0001892 embryonic placenta development IEA --
GO:0006629 lipid metabolic process TAS 7887897
GO:0006810 transport TAS 7887897
GO:0007584 response to nutrient IEA --
genes like me logo Genes that share ontologies with TTPA: view

Compounds for TTPA Gene

(1) HMDB Compounds for TTPA Gene

Compound Synonyms Cas Number PubMed IDs
  • Vitamin Ea

(2) Drugbank Compounds for TTPA Gene

Compound Synonyms Cas Number Type Actions PubMed IDs
Vitamin E
  • alpha-Tocopherol
59-02-9 carrier

(13) Novoseek inferred chemical compound relationships for TTPA Gene

Compound -log(P) Hits PubMed IDs
alpha tocopherol 92.5 163
tocopherol 91.1 39
vitamin-e 88.6 85
delta-tocopherol 75.3 1
alpha-tocopherol quinone 64.6 2
genes like me logo Genes that share compounds with TTPA: view

Transcripts for TTPA Gene

mRNA/cDNA for TTPA Gene

(18) Selected AceView cDNA sequences:
(4) Additional mRNA sequences :
(2) REFSEQ mRNAs :
(2) Ensembl transcripts including schematic representations, and UCSC links where relevant :

Unigene Clusters for TTPA Gene

Tocopherol (alpha) transfer protein:
Representative Sequences:

CRISPR Products

Inhibitory RNA Products

  • Predesigned siRNA for gene silencing in human,mouse,rat for TTPA

Primer Products

  • OriGene qSTAR qPCR primer pairs in human,mouse,rat for TTPA

Flow Cytometry Products

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

No ASD Table

Relevant External Links for TTPA Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for TTPA Gene

mRNA expression in normal human tissues for TTPA Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

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

This gene is overexpressed in Liver (35.8).

Integrated Proteomics: protein expression from ProteomicsDB, PaxDb, MOPED, and MaxQB for TTPA Gene

SOURCE GeneReport for Unigene cluster for TTPA Gene Hs.69049

genes like me logo Genes that share expressions with TTPA: view

In Situ Assay Products

No data available for mRNA Expression by UniProt/SwissProt for TTPA Gene

Orthologs for TTPA Gene

This gene was present in the common ancestor of animals.

Orthologs for TTPA Gene

Organism Taxonomy Gene Similarity Type Details
(Pan troglodytes)
Mammalia TTPA 35
  • 99.16 (n)
  • 99.28 (a)
  • 99 (a)
(Bos Taurus)
Mammalia TTPA 35
  • 86.76 (n)
  • 88.45 (a)
  • 87 (a)
(Canis familiaris)
Mammalia TTPA 35
  • 91.95 (n)
  • 95.17 (a)
  • 90 (a)
(Mus musculus)
Mammalia Ttpa 35
  • 86.57 (n)
  • 89.21 (a)
Ttpa 16
Ttpa 36
  • 89 (a)
(Monodelphis domestica)
Mammalia TTPA 36
  • 77 (a)
(Ornithorhynchus anatinus)
Mammalia TTPA 36
  • 68 (a)
(Rattus norvegicus)
Mammalia Ttpa 35
  • 85.73 (n)
  • 88.85 (a)
(Gallus gallus)
Aves TTPA 35
  • 74.16 (n)
  • 73.41 (a)
  • 70 (a)
(Anolis carolinensis)
Reptilia TTPA 36
  • 69 (a)
(Danio rerio)
Actinopterygii ttpa 35
  • 62.45 (n)
  • 63.6 (a)
ttpa 36
  • 59 (a)
wufd44e05 35
fruit fly
(Drosophila melanogaster)
Insecta CG10300 36
  • 20 (a)
CG10301 36
  • 18 (a)
CG10657 36
  • 20 (a)
CG11550 36
  • 14 (a)
CG12926 36
  • 20 (a)
CG1902 36
  • 18 (a)
CG2663 36
  • 20 (a)
CG30339 36
  • 21 (a)
CG3091 36
  • 19 (a)
CG31636 36
  • 20 (a)
CG3191 36
  • 18 (a)
CG33514 36
  • 22 (a)
CG33965 36
  • 21 (a)
CG33966 36
  • 24 (a)
CG3823 36
  • 23 (a)
Cralbp 36
  • 22 (a)
pinta 36
  • 24 (a)
CG10237 37
  • 32 (a)
sea squirt
(Ciona savignyi)
Ascidiacea -- 36
  • 21 (a)
Species with no ortholog for TTPA:
  • A. gosspyii yeast (Ashbya gossypii)
  • Actinobacteria (Mycobacterium tuberculosis)
  • African clawed frog (Xenopus laevis)
  • 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)
  • 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)
  • rainbow trout (Oncorhynchus mykiss)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • 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)
  • tropical clawed frog (Silurana tropicalis)
  • wheat (Triticum aestivum)
  • worm (Caenorhabditis elegans)

Evolution for TTPA Gene

Gene Tree for TTPA (if available)
Gene Tree for TTPA (if available)

Paralogs for TTPA Gene

Paralogs for TTPA Gene

Selected SIMAP similar genes for TTPA Gene using alignment to 1 proteins:

genes like me logo Genes that share paralogs with TTPA: view

Variants for TTPA Gene

Sequence variations from dbSNP and Humsavar for TTPA Gene

SNP ID Clin Chr 08 pos Sequence Context AA Info Type MAF
rs2045224 -- 63,061,429(+) ATCTG(A/C)AATAG intron-variant
rs2352658 -- 63,065,240(+) gggct(C/G)gaatt intron-variant
rs4289804 -- 63,080,488(+) aggcc(A/G)aggca intron-variant
rs4446729 -- 63,070,644(+) CTACA(C/T)GAGGC intron-variant
rs4481586 -- 63,080,732(+) AAAAA(A/T)AAATA intron-variant

Relevant External Links for TTPA Gene

HapMap Linkage Disequilibrium report
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 TTPA Gene

Disorders for TTPA Gene

(1) OMIM Diseases for TTPA Gene (600415)


  • Ataxia with isolated vitamin E deficiency (AVED) [MIM:277460]: An autosomal recessive disease characterized by undetectable or markedly reduced plasma levels of vitamin E, spinocerebellar degeneration, ataxia, areflexia and proprioception loss. {ECO:0000269 PubMed:15300460, ECO:0000269 PubMed:7566022, ECO:0000269 PubMed:8602747, ECO:0000269 PubMed:9463307}. Note=The disease is caused by mutations affecting the gene represented in this entry.

(5) University of Copenhagen DISEASES for TTPA Gene

(15) Novoseek inferred disease relationships for TTPA Gene

Disease -log(P) Hits PubMed IDs
vitamin e deficiency 96.6 41
friedreich ataxia 78.3 5
abetalipoproteinemia 71.7 1
spinocerebellar ataxias 57.6 2
retinitis pigmentosa 56.3 8

Relevant External Links for TTPA

Genetic Association Database (GAD)
Human Genome Epidemiology (HuGE) Navigator
genes like me logo Genes that share disorders with TTPA: view

Publications for TTPA Gene

  1. Ataxia with isolated vitamin E deficiency is caused by mutations in the alpha-tocopherol transfer protein. (PMID: 7719340) Ouahchi K. … Koenig M. (Nat. Genet. 1995) 2 3 4 23
  2. Human alpha-tocopherol transfer protein: cDNA cloning, expression and chromosomal localization. (PMID: 7887897) Arita M. … Inoue K. (Biochem. J. 1995) 2 3 4 23
  3. Ataxia with isolated vitamin E deficiency: heterogeneity of mutations and phenotypic variability in a large number of families. (PMID: 9463307) Cavalier L. … Koenig M. (Am. J. Hum. Genet. 1998) 3 4 23
  4. The molecular basis of vitamin E retention: structure of human alpha- tocopherol transfer protein. (PMID: 12899840) Meier R. … Stocker A. (J. Mol. Biol. 2003) 3 4 23
  5. Human alpha-tocopherol transfer protein: gene structure and mutations in familial vitamin E deficiency. (PMID: 8602747) Hentati A. … Siddique T. (Ann. Neurol. 1996) 3 4 23

Products for TTPA Gene

Sources for TTPA Gene

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