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Aliases for CPT1B Gene

Aliases for CPT1B Gene

  • Carnitine Palmitoyltransferase 1B 2 3 4 5
  • Carnitine Palmitoyltransferase I-Like Protein 3 4
  • Carnitine Palmitoyltransferase 1B (Muscle) 2 3
  • Carnitine O-Palmitoyltransferase 1B 2 3
  • EC 4 63
  • CPT1-M 3 4
  • CPTI-M 3 4
  • Carnitine O-Palmitoyltransferase I, Mitochondrial Muscle Isoform 3
  • Carnitine O-Palmitoyltransferase I, Muscle Isoform 4
  • KIAA1670 4
  • EC 2.3.1 63
  • M-CPT1 3
  • MCCPT1 3
  • CPT I 4
  • CPT1M 3
  • MCPT1 3
  • CPTI 3

External Ids for CPT1B Gene

Previous GeneCards Identifiers for CPT1B Gene

  • GC22U990008
  • GC22M047513
  • GC22M049140
  • GC22M049143
  • GC22M049145
  • GC22M049299
  • GC22M049300
  • GC22M049354
  • GC22M051008
  • GC22M033899

Summaries for CPT1B Gene

Entrez Gene Summary for CPT1B Gene

  • The protein encoded by this gene, a member of the carnitine/choline acetyltransferase family, is the rate-controlling enzyme of the long-chain fatty acid beta-oxidation pathway in muscle mitochondria. This enzyme is required for the net transport of long-chain fatty acyl-CoAs from the cytoplasm into the mitochondria. Multiple transcript variants encoding different isoforms have been found for this gene, and read-through transcripts are expressed from the upstream locus that include exons from this gene. [provided by RefSeq, Jun 2009]

GeneCards Summary for CPT1B Gene

CPT1B (Carnitine Palmitoyltransferase 1B) is a Protein Coding gene. Diseases associated with CPT1B include Cpt Deficiency, Hepatic, Type Ia and Carnitine Palmitoyltransferase Ii Deficiency. Among its related pathways are Development_Leptin signaling via PI3K-dependent pathway and Glucagon signaling pathway. GO annotations related to this gene include transferase activity, transferring acyl groups and carnitine O-palmitoyltransferase activity. An important paralog of this gene is CRAT.

No data available for UniProtKB/Swiss-Prot , Tocris Summary , Gene Wiki entry , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for CPT1B Gene

Genomics for CPT1B Gene

Regulatory Elements for CPT1B Gene

Enhancers for CPT1B 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 CPT1B on UCSC Golden Path with GeneCards custom track

Genomic Location for CPT1B Gene

50,568,861 bp from pter
50,578,667 bp from pter
9,807 bases
Minus strand

Genomic View for CPT1B Gene

Genes around CPT1B on UCSC Golden Path with GeneCards custom track

Cytogenetic band:
CPT1B Gene in genomic location: bands according to Ensembl, locations according to GeneLoc (and/or Entrez Gene and/or Ensembl if different)
Genomic Location for CPT1B Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for CPT1B Gene

Proteins for CPT1B Gene

  • Protein details for CPT1B Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Carnitine O-palmitoyltransferase 1, muscle isoform
    Protein Accession:
    Secondary Accessions:
    • B7Z4U4
    • B7Z5T8
    • E9PCP2
    • Q13389
    • Q99655
    • Q9BY90

    Protein attributes for CPT1B Gene

    772 amino acids
    Molecular mass:
    87801 Da
    Quaternary structure:
    No Data Available
    • This protein is produced by a bicistronic gene which also produces the CHKB protein from a non-overlapping reading frame.
    • Sequence=BAB33340.1; Type=Erroneous initiation; Evidence={ECO:0000305};

    Alternative splice isoforms for CPT1B Gene


neXtProt entry for CPT1B Gene

Proteomics data for CPT1B Gene at MOPED

Post-translational modifications for CPT1B Gene

  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Antibody Products

  • Abcam antibodies for CPT1B

Domains & Families for CPT1B Gene

Protein Domains for CPT1B Gene

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the carnitine/choline acetyltransferase family.
  • Belongs to the carnitine/choline acetyltransferase family.
genes like me logo Genes that share domains with CPT1B: view

No data available for Gene Families for CPT1B Gene

Function for CPT1B Gene

Molecular function for CPT1B Gene

GENATLAS Biochemistry:
carnitine palmitoyl transferase of the outer mitochondrial membrane 1B,88kDa,malonyl CoA sensitive,muscle isoform,generating palmitoylcarnitine and CoAsH (palmitoyl-CoA shuttle system)
UniProtKB/Swiss-Prot CatalyticActivity:
Palmitoyl-CoA + L-carnitine = CoA + L-palmitoylcarnitine.

Enzyme Numbers (IUBMB) for CPT1B Gene

Gene Ontology (GO) - Molecular Function for CPT1B Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005515 protein binding IPI 25416956
genes like me logo Genes that share ontologies with CPT1B: view
genes like me logo Genes that share phenotypes with CPT1B: view

Animal Models for CPT1B Gene

MGI Knock Outs for CPT1B:

Animal Model Products

  • Taconic Biosciences Mouse Models for CPT1B

No data available for Human Phenotype Ontology , Transcription Factor Targets and HOMER Transcription for CPT1B Gene

Localization for CPT1B Gene

Subcellular locations from UniProtKB/Swiss-Prot for CPT1B Gene

Mitochondrion outer membrane; Multi-pass membrane protein.

Subcellular locations from

Jensen Localization Image for CPT1B Gene COMPARTMENTS Subcellular localization image for CPT1B gene
Compartment Confidence
mitochondrion 5
cytosol 3
peroxisome 2

No data available for Gene Ontology (GO) - Cellular Components for CPT1B Gene

Pathways & Interactions for CPT1B Gene

genes like me logo Genes that share pathways with CPT1B: view

UniProtKB/Swiss-Prot Q92523-CPT1B_HUMAN

  • Pathway: Lipid metabolism; fatty acid beta-oxidation.

Gene Ontology (GO) - Biological Process for CPT1B Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0008152 metabolic process IEA --
GO:0044255 cellular lipid metabolic process TAS --
genes like me logo Genes that share ontologies with CPT1B: view

No data available for SIGNOR curated interactions for CPT1B Gene

Drugs & Compounds for CPT1B Gene

(11) Drugs for CPT1B Gene - From: HMDB and Novoseek

Name Status Disease Links Group Role Mechanism of Action Clinical Trials
L-Carnitine Approved Pharma 0
Glycerol Experimental Pharma 205
MYRISTIC ACID Experimental Pharma 0
Palmitic Acid Experimental Pharma Full agonist, Agonist 22
Stearic acid Experimental Pharma 0

(18) Additional Compounds for CPT1B Gene - From: HMDB and Novoseek

Name Synonyms Role CAS Number PubChem IDs PubMed IDs
Arachidic acid
  • Arachate
  • Arachic acid
  • Arachidate
  • Arachidic acid
  • Eicosanoate
Heptadecanoic acid
  • Heptadecanoate
  • Heptadecanoic acid
  • Margarate
  • Margaric acid
  • Margarinate
Heptadecanoyl CoA
  • Heptadecanoate
  • Heptadecanoic acid
  • Heptadecanoic acid coa
  • Heptadecanoyl coenzyme A
  • Heptadecanoyl-coA
  • (+)-palmitoylcarnitine
  • (3S)-3-hexadecanoyloxy-4-(trimethylammonio)butanoate
  • (3S)-3-hexadecanoyloxy-4-(trimethylammonio)butanoic acid
  • (3S)-3-palmitoyloxy-4-(trimethylammonio)butanoate
  • (3S)-3-palmitoyloxy-4-(trimethylammonio)butanoic acid
genes like me logo Genes that share compounds with CPT1B: view

Transcripts for CPT1B Gene

Unigene Clusters for CPT1B Gene

Carnitine palmitoyltransferase 1B (muscle):
Representative Sequences:

Alternative Splicing Database (ASD) splice patterns (SP) for CPT1B Gene

No ASD Table

Relevant External Links for CPT1B Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for CPT1B Gene

mRNA expression in normal human tissues for CPT1B Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for CPT1B Gene

This gene is overexpressed in Heart - Left Ventricle (x7.6) and Heart - Atrial Appendage (x4.1).

Protein differential expression in normal tissues from HIPED for CPT1B Gene

This gene is overexpressed in Heart (47.2) and Fetal heart (14.8).

Integrated Proteomics: protein expression in normal tissues and cell lines from ProteomicsDB, PaxDb, MOPED, and MaxQB for CPT1B Gene

SOURCE GeneReport for Unigene cluster for CPT1B Gene Hs.439777

mRNA Expression by UniProt/SwissProt for CPT1B Gene

Tissue specificity: Strong expression in heart and skeletal muscle. No expression in liver and kidney.
genes like me logo Genes that share expression patterns with CPT1B: view

Primer Products

No data available for Protein tissue co-expression partners for CPT1B Gene

Orthologs for CPT1B Gene

This gene was present in the common ancestor of animals and fungi.

Orthologs for CPT1B Gene

Organism Taxonomy Gene Similarity Type Details
(Bos Taurus)
Mammalia CPT1B 35
  • 87.91 (n)
  • 88.82 (a)
CPT1B 36
  • 89 (a)
(Canis familiaris)
Mammalia CPT1B 35
  • 88.04 (n)
  • 90.67 (a)
CPT1B 36
  • 91 (a)
(Mus musculus)
Mammalia Cpt1b 35
  • 85.66 (n)
  • 87.05 (a)
Cpt1b 16
Cpt1b 36
  • 87 (a)
(Pan troglodytes)
Mammalia CPT1B 35
  • 99.74 (n)
  • 99.48 (a)
CPT1B 36
  • 99 (a)
(Rattus norvegicus)
Mammalia Cpt1b 35
  • 84.54 (n)
  • 85.75 (a)
(Monodelphis domestica)
Mammalia CPT1B 36
  • 82 (a)
(Ornithorhynchus anatinus)
Mammalia CPT1B 36
  • 77 (a)
(Anolis carolinensis)
Reptilia CPT1B 36
  • 68 (a)
tropical clawed frog
(Silurana tropicalis)
Amphibia cpt1b 35
  • 64.32 (n)
  • 65.14 (a)
(Danio rerio)
Actinopterygii Dr.12241 35
cpt1b 36
  • 65 (a)
rainbow trout
(Oncorhynchus mykiss)
Actinopterygii Omy.9513 35
fruit fly
(Drosophila melanogaster)
Insecta CPTI 37
  • 50 (a)
whd 36
  • 50 (a)
(Caenorhabditis elegans)
Secernentea K11D12.4 37
  • 33 (a)
W01A11.5 37
  • 34 (a)
W03F9.4 37
  • 36 (a)
Y46G5A.17 37
  • 45 (a)
Y48G9A.10 37
  • 30 (a)
cpt-1 36
  • 43 (a)
baker's yeast
(Saccharomyces cerevisiae)
Saccharomycetes CKI1 38
sea squirt
(Ciona savignyi)
Ascidiacea -- 36
  • 50 (a)
Species with no ortholog for CPT1B:
  • 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)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • bread mold (Neurospora crassa)
  • chicken (Gallus gallus)
  • 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)
  • 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)
  • wheat (Triticum aestivum)

Evolution for CPT1B Gene

Gene Tree for CPT1B (if available)
Gene Tree for CPT1B (if available)

Paralogs for CPT1B Gene

Paralogs for CPT1B Gene

(5) SIMAP similar genes for CPT1B Gene using alignment to 6 proteins:

genes like me logo Genes that share paralogs with CPT1B: view

Variants for CPT1B Gene

Sequence variations from dbSNP and Humsavar for CPT1B Gene

SNP ID Clin Chr 22 pos Sequence Context AA Info Type
VAR_011739 -
VAR_011740 -
VAR_020029 -
VAR_021854 -
VAR_024188 -

Structural Variations from Database of Genomic Variants (DGV) for CPT1B Gene

Variant ID Type Subtype PubMed ID
nsv915495 CNV Loss 21882294
nsv914525 CNV Loss 21882294
dgv5062n71 CNV Loss 21882294
nsv471224 CNV Loss 18288195
nsv914542 CNV Loss 21882294
nsv914543 CNV Loss 21882294
nsv834239 CNV Loss 17160897
dgv1422e1 CNV Complex 17122850
dgv5066n71 CNV Loss 21882294
nsv829340 CNV Gain 20364138
dgv5067n71 CNV Loss 21882294
nsv914559 CNV Loss 21882294
esv33185 CNV Loss 17666407
nsv914561 CNV Loss 21882294
dgv5068n71 CNV Loss 21882294

Variation tolerance for CPT1B Gene

Residual Variation Intolerance Score: 28.4% of all genes are more intolerant (likely to be disease-causing)
Gene Damage Index Score: 12.09; 93.82% of all genes are more intolerant (likely to be disease-causing)

Relevant External Links for CPT1B Gene

Human Gene Mutation Database (HGMD)

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot for CPT1B Gene

Disorders for CPT1B Gene

MalaCards: The human disease database

(6) MalaCards diseases for CPT1B Gene - From: DISEASES, Novoseek, and GeneCards

Disorder Aliases PubMed IDs
cpt deficiency, hepatic, type ia
  • carnitine palmitoyltransferase 1a deficiency
carnitine palmitoyltransferase ii deficiency
  • cpt-ii
visceral steatosis
  • steatosis of liver
  • thiamine deficiency
- elite association - COSMIC cancer census association via MalaCards
Search CPT1B in MalaCards View complete list of genes associated with diseases

Relevant External Links for CPT1B

Genetic Association Database (GAD)
Human Genome Epidemiology (HuGE) Navigator
Atlas of Genetics and Cytogenetics in Oncology and Haematology:
genes like me logo Genes that share disorders with CPT1B: view

No data available for UniProtKB/Swiss-Prot and Genatlas for CPT1B Gene

Publications for CPT1B Gene

  1. Fine chromosome mapping of the genes for human liver and muscle carnitine palmitoyltransferase I (CPT1A and CPT1B). (PMID: 9070950) Britton C.H. … McGarry J.D. (Genomics 1997) 2 3 4 23 67
  2. Association of the CPT1B gene with skeletal muscle fat infiltration in Afro-Caribbean men. (PMID: 19553926) Miljkovic I. … Zmuda J.M. (Obesity (Silver Spring) 2009) 3 23
  3. Variants within the muscle and liver isoforms of the carnitine palmitoyltransferase I (CPT1) gene interact with fat intake to modulate indices of obesity in French-Canadians. (PMID: 17089095) Robitaille J. … Vohl M.C. (J. Mol. Med. 2007) 3 23
  4. Cysteine-scanning mutagenesis of muscle carnitine palmitoyltransferase I reveals a single cysteine residue (Cys-305) is important for catalysis. (PMID: 15579906) Liu H. … Woldegiorgis G. (J. Biol. Chem. 2005) 3 23
  5. Identification of novel transcribed sequences on human chromosome 22 by expressed sequence tag mapping. (PMID: 11258795) Hirosawa M. … Ohara O. (DNA Res. 2001) 3 23

Products for CPT1B Gene

Sources for CPT1B Gene