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Aliases for CPOX Gene

Aliases for CPOX Gene

  • Coproporphyrinogen Oxidase 2 3 5
  • Coproporphyrinogenase 3 4
  • Coprogen Oxidase 3 4
  • CPO 3 4
  • COX 3 4
  • CPX 3 4
  • Oxygen-Dependent Coproporphyrinogen-III Oxidase, Mitochondrial 3
  • Coproporphyrinogen Oxidase (Coproporphyria, Harderoporphyria) 2
  • Coproporphyria 2
  • EC 4
  • HCP 3

External Ids for CPOX Gene

Previous HGNC Symbols for CPOX Gene

  • CPO

Previous GeneCards Identifiers for CPOX Gene

  • GC03M099619
  • GC03M099780
  • GC03M098298
  • GC03M095670
  • GC03M098239

Summaries for CPOX Gene

Entrez Gene Summary for CPOX Gene

  • The protein encoded by this gene is the sixth enzyme of the heme biosynthetic pathway. The encoded enzyme is soluble and found in the intermembrane space of mitochondria. This enzyme catalyzes the stepwise oxidative decarboxylation of coproporphyrinogen III to protoporphyrinogen IX, a precursor of heme. Defects in this gene are a cause of hereditary coproporphyria (HCP).[provided by RefSeq, Oct 2009]

GeneCards Summary for CPOX Gene

CPOX (Coproporphyrinogen Oxidase) is a Protein Coding gene. Diseases associated with CPOX include Coproporphyria, Hereditary and Porphyria Cutanea Tarda. Among its related pathways are Metabolism and Porphyrin and chlorophyll metabolism. Gene Ontology (GO) annotations related to this gene include protein homodimerization activity and structural constituent of eye lens.

UniProtKB/Swiss-Prot for CPOX Gene

  • Involved in the heme biosynthesis. Catalyzes the aerobic oxidative decarboxylation of propionate groups of rings A and B of coproporphyrinogen-III to yield the vinyl groups in protoporphyrinogen-IX.

Gene Wiki entry for CPOX Gene

Additional gene information for CPOX Gene

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

Genomics for CPOX Gene

GeneHancer (GH) Regulatory Elements for CPOX Gene

Promoters and enhancers for CPOX Gene
GeneHancer (GH) Identifier GH Type GH
GH Sources Gene Association Score Total Score TSS distance (kb) Number of Genes Away Size (kb) Transcription Factor
Binding Sites
Gene Targets
GH03J098592 Promoter/Enhancer 2.3 EPDnew Ensembl ENCODE dbSUPER 650.7 +0.2 245 2.6 HDGF PKNOX1 FOXA2 SMAD1 MLX ARNT ZFP64 ARID4B SIN3A DMAP1 GC03M098591 CPOX ST3GAL6-AS1 GC03M098547
GH03J098550 Promoter/Enhancer 1.8 EPDnew FANTOM5 ENCODE dbSUPER 16 +38.7 38661 8.2 HDGF PKNOX1 SMAD1 IRF4 TCF12 GATA2 ATF7 RUNX3 RXRA JUNB CLDND1 CPOX GPR15 DCBLD2 ST3GAL6-AS1 OR5H6 OR5H2 GC03M098547
GH03J098560 Enhancer 1.6 FANTOM5 Ensembl ENCODE dbSUPER 16.9 +28.8 28774 8.4 HDGF PKNOX1 SMAD1 RB1 STAT5A BMI1 FEZF1 BATF KLF5 IRF4 CPOX OR5K2 ST3GAL6-AS1 ST3GAL6 GPR15 CLDND1 GC03M098547
GH03J098890 Promoter/Enhancer 2.4 EPDnew Ensembl ENCODE dbSUPER 9.5 -304.0 -304042 15.1 HDGF PKNOX1 FOXA2 ARID4B SIN3A DMAP1 YY1 ZNF143 FOS SP3 DCBLD2 ST3GAL6 CPOX LOC105374002 RNU6-26P GC03M098805
GH03J098573 Enhancer 1.3 FANTOM5 ENCODE dbSUPER 16.4 +20.2 20220 0.9 NFIB ZNF133 FEZF1 RAD21 ZNF366 ZNF143 ATF7 IKZF2 ZNF680 ZNF362 CPOX CLDND1 OR5H6 OR5H2 GC03M098547
- Elite GeneHancer and/or Elite GeneHancer-gene association Download GeneHancer data from 2017 publication | Request up-to-date GeneHancer data (full dataset)

GeneHancers around CPOX on UCSC Golden Path with GeneCards custom track

Top Transcription factor binding sites by QIAGEN in the CPOX gene promoter:
  • HFH-3
  • FOXI1
  • Msx-1
  • YY1
  • Pax-4a
  • GATA-3
  • c-Myc
  • Max
  • AREB6
  • HEN1

Genomic Locations for CPOX Gene

Genomic Locations for CPOX Gene
72,592 bases
Minus strand
72,592 bases
Minus strand

Genomic View for CPOX Gene

Genes around CPOX on UCSC Golden Path with GeneCards custom track

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

RefSeq DNA sequence for CPOX Gene

Proteins for CPOX Gene

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

    Protein Symbol:
    Recommended name:
    Oxygen-dependent coproporphyrinogen-III oxidase, mitochondrial
    Protein Accession:
    Secondary Accessions:
    • A8K275
    • B4DSD5
    • Q14060
    • Q53F08
    • Q8IZ45
    • Q96AF3

    Protein attributes for CPOX Gene

    454 amino acids
    Molecular mass:
    50152 Da
    Quaternary structure:
    • Homodimer.
    • Sequence=BAA04033.1; Type=Erroneous initiation; Note=Translation N-terminally extended.; Evidence={ECO:0000305};

    Three dimensional structures from OCA and Proteopedia for CPOX Gene

    Alternative splice isoforms for CPOX Gene


neXtProt entry for CPOX Gene

Post-translational modifications for CPOX Gene

  • Ubiquitination at posLast=184184
  • Modification sites at PhosphoSitePlus

Other Protein References for CPOX Gene

No data available for DME Specific Peptides for CPOX Gene

Domains & Families for CPOX Gene

Gene Families for CPOX Gene

Human Protein Atlas (HPA):
  • Disease related genes
  • Enzymes
  • Potential drug targets
  • Predicted membrane proteins

Suggested Antigen Peptide Sequences for CPOX Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the aerobic coproporphyrinogen-III oxidase family.
  • Belongs to the aerobic coproporphyrinogen-III oxidase family.
genes like me logo Genes that share domains with CPOX: view

Function for CPOX Gene

Molecular function for CPOX Gene

UniProtKB/Swiss-Prot Function:
Involved in the heme biosynthesis. Catalyzes the aerobic oxidative decarboxylation of propionate groups of rings A and B of coproporphyrinogen-III to yield the vinyl groups in protoporphyrinogen-IX.
UniProtKB/Swiss-Prot CatalyticActivity:
Coproporphyrinogen-III + O(2) + 2 H(+) = protoporphyrinogen-IX + 2 CO(2) + 2 H(2)O.

Enzyme Numbers (IUBMB) for CPOX Gene

Gene Ontology (GO) - Molecular Function for CPOX Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0004109 coproporphyrinogen oxidase activity TAS --
GO:0005212 structural constituent of eye lens IEA --
GO:0016491 oxidoreductase activity IEA --
GO:0042802 identical protein binding IEA --
GO:0042803 protein homodimerization activity IDA 16176984
genes like me logo Genes that share ontologies with CPOX: view
genes like me logo Genes that share phenotypes with CPOX: view

Human Phenotype Ontology for CPOX Gene

HPO Id HPO Name Alternative Ids Definition Synonyms

Animal Model Products

CRISPR Products

Inhibitory RNA Products

  • Search GeneCopoeia for shRNA, lentivirus and/or AAV clone products for CPOX

No data available for Phenotypes From GWAS Catalog , Animal Models , Transcription Factor Targets and HOMER Transcription for CPOX Gene

Localization for CPOX Gene

Subcellular locations from UniProtKB/Swiss-Prot for CPOX Gene

Mitochondrion intermembrane space.

Subcellular locations from

Extracellular space Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi Apparatus Nucleus Mitochondrion 0 1 2 3 4 5 Confidence
COMPARTMENTS Subcellular localization image for CPOX gene
Compartment Confidence
mitochondrion 5
cytosol 5
plasma membrane 1
nucleus 1

Subcellular locations from the

Human Protein Atlas (HPA)

Gene Ontology (GO) - Cellular Components for CPOX Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005737 cytoplasm IBA --
GO:0005739 mitochondrion IDA,TAS --
GO:0005743 mitochondrial inner membrane IEA --
GO:0005758 mitochondrial intermembrane space TAS --
GO:0005829 cytosol IDA --
genes like me logo Genes that share ontologies with CPOX: view

Pathways & Interactions for CPOX Gene

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

Pathways by source for CPOX Gene

UniProtKB/Swiss-Prot P36551-HEM6_HUMAN

  • Pathway: Porphyrin-containing compound metabolism; protoporphyrin-IX biosynthesis; protoporphyrinogen-IX from coproporphyrinogen-III (O2 route): step 1/1.

Gene Ontology (GO) - Biological Process for CPOX Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0006779 porphyrin-containing compound biosynthetic process IEA --
GO:0006782 protoporphyrinogen IX biosynthetic process IEA --
GO:0006783 heme biosynthetic process TAS --
GO:0010035 response to inorganic substance IEA --
GO:0010039 response to iron ion IEA --
genes like me logo Genes that share ontologies with CPOX: view

No data available for SIGNOR curated interactions for CPOX Gene

Drugs & Compounds for CPOX Gene

(35) Drugs for CPOX Gene - From: HMDB and Novoseek

Name Status Disease Links Group Role Mechanism of Action Clinical Trials
Oxygen Approved, Vet_approved Pharma 0
Carbon dioxide Approved, Investigational, Vet_approved Pharma 0
Water Approved Pharma 0
Protoporphyrin IX Experimental Pharma 12
Coproporphyrinogen III Experimental Pharma 0

(37) Additional Compounds for CPOX Gene - From: HMDB and Novoseek

Name Synonyms Role CAS Number PubChem IDs PubMed IDs
Coproporphyrin III
  • 3,8,13,17-Tetramethylporphyrin-2,7,12,18-tetrapropanoic acid
  • 3,8,13,17-Tetramethylporphyrin-2,7,12,18-tetrapropanoate
  • Formyl coenzyme A
  • Formyl-coenzyme A
Hydrogen Ion
  • H+
  • H(+)
  • Hydrogen cation
  • Hydron
  • Proton
Protoporphyrinogen IX
  • 7,12-Diethenyl-3,8,13,17-tetramethyl-5,10,15,20,22,24-hexahydroporphyrin-2,18-dipropanoic acid
  • 7,12-Diethenyl-3,8,13,17-tetramethyl-5,10,15,20,22,24-hexahydroporphyrin-2,18-dipropanoate
  • 5,10,15,20,22,24-hexahydro Protoporphyrin IX deriv.
  • 7,12-Diethenyl-5,10,15,20,22,24-hexahydro-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoate
  • 7,12-Diethenyl-5,10,15,20,22,24-hexahydro-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoic acid
genes like me logo Genes that share compounds with CPOX: view

Transcripts for CPOX Gene

mRNA/cDNA for CPOX Gene

Unigene Clusters for CPOX Gene

Coproporphyrinogen oxidase:
Representative Sequences:

CRISPR Products

Inhibitory RNA Products

  • Search GeneCopoeia for shRNA, lentivirus and/or AAV clone products for CPOX

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

ExUns: 1a · 1b · 1c · 1d ^ 2a · 2b · 2c ^ 3a · 3b ^ 4a · 4b ^ 5 ^ 6a · 6b ^ 7
SP1: -
SP2: - -
SP4: - -

Relevant External Links for CPOX Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for CPOX Gene

mRNA expression in normal human tissues from GTEx, Illumina, BioGPS, and CGAP SAGE for CPOX Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

Protein differential expression in normal tissues from HIPED for CPOX Gene

This gene is overexpressed in Bone (13.7), Peripheral blood mononuclear cells (10.0), and Fetal Liver (9.5).

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

Protein tissue co-expression partners for CPOX Gene

- Elite partner

NURSA nuclear receptor signaling pathways regulating expression of CPOX Gene:


SOURCE GeneReport for Unigene cluster for CPOX Gene:


Evidence on tissue expression from TISSUES for CPOX Gene

  • Liver(4.5)
  • Nervous system(4.3)
  • Blood(2.2)

Phenotype-based relationships between genes and organs from Gene ORGANizer for CPOX Gene

Germ Layers:
  • ectoderm
  • endoderm
  • mesoderm
  • cardiovascular
  • digestive
  • integumentary
  • lymphatic
  • nervous
  • respiratory
  • skeletal muscle
Head and neck:
  • brain
  • ear
  • eye
  • head
  • mouth
  • esophagus
  • heart
  • heart valve
  • lung
  • intestine
  • large intestine
  • liver
  • small intestine
  • spleen
  • stomach
  • rectum
  • blood
  • blood vessel
  • peripheral nerve
  • peripheral nervous system
  • red blood cell
  • skin
genes like me logo Genes that share expression patterns with CPOX: view

No data available for mRNA differential expression in normal tissues and mRNA Expression by UniProt/SwissProt for CPOX Gene

Orthologs for CPOX Gene

This gene was present in the common ancestor of eukaryotes.

Orthologs for CPOX Gene

Organism Taxonomy Gene Similarity Type Details
(Pan troglodytes)
Mammalia CPOX 34 33
  • 99.49 (n)
(Canis familiaris)
Mammalia CPOX 34
  • 94 (a)
(Bos Taurus)
Mammalia CPOX 34 33
  • 87.2 (n)
(Rattus norvegicus)
Mammalia Cpox 33
  • 83.94 (n)
(Mus musculus)
Mammalia Cpox 16 34 33
  • 83.41 (n)
(Monodelphis domestica)
Mammalia CPOX 34
  • 74 (a)
(Ornithorhynchus anatinus)
Mammalia CPOX 34
  • 58 (a)
(Gallus gallus)
Aves CPOX 34 33
  • 73.67 (n)
(Anolis carolinensis)
Reptilia CPOX 34
  • 85 (a)
tropical clawed frog
(Silurana tropicalis)
Amphibia cpox 33
  • 69.57 (n)
(Danio rerio)
Actinopterygii cpox 34 33
  • 66.76 (n)
-- 33
rainbow trout
(Oncorhynchus mykiss)
Actinopterygii Omy.10575 33
African malaria mosquito
(Anopheles gambiae)
Insecta AgaP_AGAP004749 33
  • 61.21 (n)
fruit fly
(Drosophila melanogaster)
Insecta Coprox 34 33
  • 60.2 (n)
A. gosspyii yeast
(Ashbya gossypii)
Saccharomycetes AGOS_AGR030C 33
  • 55.08 (n)
baker's yeast
(Saccharomyces cerevisiae)
Saccharomycetes HEM13 36 34 33
  • 54.97 (n)
K. lactis yeast
(Kluyveromyces lactis)
Saccharomycetes KLLA0F18546g 33
  • 54.21 (n)
thale cress
(Arabidopsis thaliana)
eudicotyledons LIN2 33
  • 52.7 (n)
Alicante grape
(Vitis vinifera)
eudicotyledons Vvi.10363 33
(Oryza sativa)
Liliopsida Os04g0610800 33
  • 60.7 (n)
Os.17919 33
(Triticum aestivum)
Liliopsida Ta.2884 33
(Hordeum vulgare)
Liliopsida Hv.138 33
sea squirt
(Ciona savignyi)
Ascidiacea -- 34
  • 58 (a)
Cin.1210 33
fission yeast
(Schizosaccharomyces pombe)
Schizosaccharomycetes hem13 33
  • 56 (n)
bread mold
(Neurospora crassa)
Ascomycetes NCU01546 33
  • 54.85 (n)
sea squirt
(Ciona intestinalis)
Ascidiacea Cin.1210 33
Species where no ortholog for CPOX was found in the sources mined by GeneCards:
  • Actinobacteria (Mycobacterium tuberculosis)
  • African clawed frog (Xenopus laevis)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • beta proteobacteria (Neisseria meningitidis)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • 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)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • worm (Caenorhabditis elegans)

Evolution for CPOX Gene

Gene Tree for CPOX (if available)
Gene Tree for CPOX (if available)
Evolutionary constrained regions (ECRs) for CPOX: view image

Paralogs for CPOX Gene

No data available for Paralogs for CPOX Gene

Variants for CPOX Gene

Sequence variations from dbSNP and Humsavar for CPOX Gene

SNP ID Clin Chr 03 pos Variation AA Info Type
rs1044411971 uncertain-significance, Hereditary coproporphyria 98,580,343(-) T/C 3_prime_UTR_variant, intron_variant, non_coding_transcript_variant
rs1051712 benign, Hereditary coproporphyria 98,580,521(-) T/G 3_prime_UTR_variant, intron_variant, non_coding_transcript_variant
rs1131857 benign, Hereditary coproporphyria 98,588,852(-) T/G coding_sequence_variant, missense_variant, non_coding_transcript_variant
rs115030377 likely-benign, Hereditary coproporphyria 98,593,559(-) C/G 5_prime_UTR_variant, non_coding_transcript_variant
rs11921054 benign, Hereditary coproporphyria 98,585,559(-) G/A/T coding_sequence_variant, missense_variant, non_coding_transcript_variant

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

Variant ID Type Subtype PubMed ID
dgv293n21 CNV loss 19592680
dgv4819n100 CNV gain 25217958
nsv591065 CNV gain 21841781
nsv834775 CNV gain 17160897

Variation tolerance for CPOX Gene

Residual Variation Intolerance Score: 67.7% of all genes are more intolerant (likely to be disease-causing)
Gene Damage Index Score: 11.67; 93.20% of all genes are more intolerant (likely to be disease-causing)

Additional Variant Information for CPOX Gene

Human Gene Mutation Database (HGMD)
SNPedia medical, phenotypic, and genealogical associations of SNPs for

SNP Genotyping and Copy Number Assay Products

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

Disorders for CPOX Gene

MalaCards: The human disease database

(12) MalaCards diseases for CPOX Gene - From: HGMD, OMIM, ClinVar, GTR, Orphanet, Swiss-Prot, DISEASES, Novoseek, and GeneCards

Disorder Aliases PubMed IDs
coproporphyria, hereditary
  • hcp
porphyria cutanea tarda
  • pct
  • disorder of porphyrin and hem metabolism
porphyria variegata
  • variegate porphyria; vp
protoporphyria, erythropoietic
  • epp
- elite association - COSMIC cancer census association via MalaCards
Search CPOX in MalaCards View complete list of genes associated with diseases


  • Hereditary coproporphyria (HCP) [MIM:121300]: A form of porphyria. Porphyrias are inherited defects in the biosynthesis of heme, resulting in the accumulation and increased excretion of porphyrins or porphyrin precursors. They are classified as erythropoietic or hepatic, depending on whether the enzyme deficiency occurs in red blood cells or in the liver. Hereditary coproporphyria is an acute hepatic porphyria characterized by skin photosensitivity, attacks of abdominal pain, neurological disturbances, and psychiatric symptoms. Most attacks are precipitated by drugs, alcohol, caloric deprivation, infections, or endocrine factors. Hereditary coproporphyria is biochemically characterized by overexcretion of coproporphyrin III in the urine and in the feces. {ECO:0000269 PubMed:12181641, ECO:0000269 PubMed:15896662, ECO:0000269 PubMed:16398658, ECO:0000269 PubMed:7757079, ECO:0000269 PubMed:7849704, ECO:0000269 PubMed:8012360, ECO:0000269 PubMed:8990017, ECO:0000269 PubMed:9048920, ECO:0000269 PubMed:9298818, ECO:0000269 PubMed:9888388}. Note=The disease is caused by mutations affecting the gene represented in this entry.

Additional Disease Information for CPOX

Genetic Association Database
Human Genome Epidemiology Navigator
ATLAS of Genetics and Cytogenetics in Oncology and Haematology
genes like me logo Genes that share disorders with CPOX: view

No data available for Genatlas for CPOX Gene

Publications for CPOX Gene

  1. The association between a genetic polymorphism of coproporphyrinogen oxidase, dental mercury exposure and neurobehavioral response in humans. (PMID: 16343843) Echeverria D … Garabedian CE (Neurotoxicology and teratology 2006) 3 22 44 58
  2. Structural basis of hereditary coproporphyria. (PMID: 16176984) Lee DS … Raman CS (Proceedings of the National Academy of Sciences of the United States of America 2005) 3 4 22 58
  3. The long, but not the short, presequence of human coproporphyrinogen oxidase is essential for its import and sorting to mitochondria. (PMID: 12862310) Susa S … Kato T (The Tohoku journal of experimental medicine 2003) 3 4 22 58
  4. Two novel mutations and coexistence of the 991C>T and the 1339C>T mutation on a single allele in the coproporphyrinogen oxidase gene in Swedish patients with hereditary coproporphyria. (PMID: 12181641) Wiman A … Harper P (Journal of human genetics 2002) 3 4 22 58
  5. Systematic analysis of coproporphyrinogen oxidase gene defects in hereditary coproporphyria and mutation update. (PMID: 9888388) Rosipal R … Deybach JC (Human mutation 1999) 3 4 22 58

Products for CPOX Gene

Sources for CPOX Gene

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