Barth syndrome
diseaseOn this page
Also known as 3-methylglutaconic aciduria type 23-methylglutaconic aciduria type IIBarth syndrome, X-linked recessiveBTHScardioskeletal myopathy with neutropenia and abnormal mitochondriacardioskeletal myopathy-neutropenia syndromeMGA2TAZ defectX-linked cardioskeletal myopathy and neutropenia
Summary
Barth syndrome (MONDO:0010543) is a disease caused by TAFAZZIN (GenCC Definitive), with 5 cohort genes and 9 clinical trials. Top therapeutic interventions include triheptanoin and elamipretide.
At a glance
- Prevalence: 1-9 / 1 000 000 (Europe) [Orphanet-validated]
- Causal gene: TAFAZZIN (GenCC Definitive)
- Cohort genes: 5
- ClinVar variants: 509
- Phenotypes (HPO): 4
- Clinical trials: 9
Clinical features
Epidemiology
Prevalence records
4 prevalence record(s), Orphanet:
| Type | Class | Value | Geography | Validation |
|---|---|---|---|---|
| Point prevalence | 1-9 / 1 000 000 | 0.22 | Europe | Validated |
| Prevalence at birth | 1-9 / 1 000 000 | 0.29 | United States | Validated |
| Prevalence at birth | 1-9 / 1 000 000 | 0.15 | France | Validated |
| Prevalence at birth | 1-9 / 1 000 000 | 0.71 | United Kingdom | Validated |
Signs & symptoms
Clinical features (HPO)
4 HPO clinical features (Orphanet curated; top 4 by frequency):
| HPO ID | Term | Frequency |
|---|---|---|
| HP:0001644 | Dilated cardiomyopathy | Very frequent (80-99%) |
| HP:0001706 | Endocardial fibroelastosis | Frequent (30-79%) |
| HP:0001874 | Abnormality of neutrophils | Frequent (30-79%) |
| HP:0008322 | Abnormal mitochondrial morphology | Frequent (30-79%) |
Identifiers
Disease identifiers
| Field | Value |
|---|---|
| Canonical name | Barth syndrome |
| Mondo ID | MONDO:0010543 |
| MeSH | D056889 |
| OMIM | 302060 |
| Orphanet | 111 |
| DOID | DOID:0050476 |
| ICD-10-CM | E78.71 |
| ICD-11 | 452199926 |
| NCIT | C84585 |
| SNOMED CT | 297231002 |
| UMLS | C0574083 |
| MedGen | 107893 |
| GARD | 0005890 |
| NORD | 840 |
| Is cancer (heuristic) | no |
Also known as: 3-methylglutaconic aciduria type 2 · 3-methylglutaconic aciduria type II · Barth syndrome · Barth syndrome, X-linked recessive · BTHS · cardioskeletal myopathy with neutropenia and abnormal mitochondria · cardioskeletal myopathy-neutropenia syndrome · MGA2 · TAZ defect · X-linked cardioskeletal myopathy and neutropenia
Data availability: 509 ClinVar variants · 3 GenCC gene-disease records · 26 cell lines.
Disease family
Classification path: disease › human disease › disease by body system or component › musculoskeletal system disorder › muscle tissue disorder › skeletal muscle disorder › myopathy › congenital myopathy › congenital structural myopathy › inborn mitochondrial myopathy › Barth syndrome
Related subtypes (23): myopathy, lactic acidosis, and sideroblastic anemia, mitochondrial encephalomyopathy, progressive external ophthalmoplegia, mitochondrial myopathy with a defect in mitochondrial-protein transport, mitochondrial myopathy with diabetes, mitochondrial myopathy with reversible cytochrome C oxidase deficiency, lethal infantile mitochondrial myopathy, sensory ataxic neuropathy, dysarthria, and ophthalmoparesis, mitochondrial trifunctional protein deficiency, adenosine monophosphate deaminase deficiency, congenital cataract-progressive muscular hypotonia-hearing loss-developmental delay syndrome, autosomal dominant mitochondrial myopathy with exercise intolerance, fatal infantile encephalocardiomyopathy, mitochondrial myopathy-lactic acidosis-deafness syndrome, mitochondrial neurogastrointestinal encephalomyopathy, adult-onset chronic progressive external ophthalmoplegia with mitochondrial myopathy, maternally-inherited progressive external ophthalmoplegia, mitochondrial myopathy, episodic, with optic atrophy and reversible leukoencephalopathy, mitochondrial complex II deficiency, nuclear type, mitochondrial myopathy-cerebellar ataxia-pigmentary retinopathy syndrome, X-linked recessive mitochondrial myopathy, mitochondrial complex I deficiency, nuclear type 1, COX deficiency, benign infantile mitochondrial myopathy
Genetics & variants
GWAS landscape
No GWAS associations recorded — common-variant (GWAS) studies don’t cover this disease (typical for Mendelian / rare diseases). See the curated gene cohort and Mendelian overlap below.
Variant details and genetic-evidence tiers
ClinVar germline variants
509 retrieved; paginated sample, class counts are floors:
187 uncertain significance, 186 likely benign, 41 likely pathogenic, 39 pathogenic, 31 conflicting classifications of pathogenicity, 12 pathogenic/likely pathogenic, 9 benign/likely benign, 4 benign
| ClinVar | Variant (HGVS) | Gene | Classification | Review |
|---|---|---|---|---|
| 2422157 | NC_000023.10:g.(?152014869)(155171615_?)del | ABCD1 | Pathogenic | criteria provided, single submitter |
| 3243728 | NC_000023.10:g.(?152954030)(154005142_?)del | ABCD1 | Pathogenic | criteria provided, single submitter |
| 1073013 | NM_000116.5(TAFAZZIN):c.109+5G>A | DNASE1L1 | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 1070847 | NC_000023.10:g.(?153640161)(153649363_?)del | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 1070848 | NC_000023.10:g.(?153639844)(153642537_?)del | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 1070849 | NC_000023.10:g.(?153647872)(153650075_?)del | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 1072332 | NM_000116.5(TAFAZZIN):c.129del (p.Val44fs) | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 1075571 | NM_000116.5(TAFAZZIN):c.293_294insTTAGGACCCC (p.Ala98_Ala99insTer) | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 11100 | NM_000116.5(TAFAZZIN):c.239-1G>A | TAFAZZIN | Pathogenic | no assertion criteria provided |
| 11101 | NM_000116.5(TAFAZZIN):c.153C>G (p.Tyr51Ter) | TAFAZZIN | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 11102 | NM_000116.5(TAFAZZIN):c.239-1G>C | TAFAZZIN | Pathogenic | no assertion criteria provided |
| 11103 | NM_000116.5(TAFAZZIN):c.580dup (p.Trp194fs) | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 11104 | NM_000116.5(TAFAZZIN):c.634del (p.Leu212fs) | TAFAZZIN | Pathogenic | no assertion criteria provided |
| 11105 | NM_000116.5(TAFAZZIN):c.589G>A (p.Gly197Arg) | TAFAZZIN | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 11107 | NM_000116.5(TAFAZZIN):c.284+110G>A | TAFAZZIN | Pathogenic | no assertion criteria provided |
| 11109 | NM_000116.5(TAFAZZIN):c.110-2A>G | TAFAZZIN | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 11110 | NM_000116.5(TAFAZZIN):c.280C>A (p.Arg94Ser) | TAFAZZIN | Pathogenic | no assertion criteria provided |
| 11111 | NM_000116.5(TAFAZZIN):c.605_608del (p.Glu202fs) | TAFAZZIN | Pathogenic | no assertion criteria provided |
| 11112 | NM_000116.5(TAFAZZIN):c.647-1G>C | TAFAZZIN | Pathogenic | no assertion criteria provided |
| 1704478 | NM_000116.5(TAFAZZIN):c.517del (p.Asp173fs) | TAFAZZIN | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 177908 | NM_000116.5(TAFAZZIN):c.710_711del (p.Val237fs) | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 1922509 | NM_000116.5(TAFAZZIN):c.586del (p.Ile196fs) | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 1966105 | NM_000116.5(TAFAZZIN):c.238+1del | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 202091 | NM_000116.5(TAFAZZIN):c.154G>T (p.Glu52Ter) | TAFAZZIN | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 202092 | NM_000116.5(TAFAZZIN):c.280C>T (p.Arg94Cys) | TAFAZZIN | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 202093 | NM_000116.5(TAFAZZIN):c.582G>A (p.Trp194Ter) | TAFAZZIN | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 2112174 | NM_000116.5(TAFAZZIN):c.153C>A (p.Tyr51Ter) | TAFAZZIN | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 2127122 | NM_000116.5(TAFAZZIN):c.575del (p.Phe192fs) | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 2138791 | NM_000116.5(TAFAZZIN):c.536del (p.Pro179fs) | TAFAZZIN | Pathogenic | criteria provided, single submitter |
| 234475 | NM_000116.5(TAFAZZIN):c.461-2A>G | TAFAZZIN | Pathogenic | criteria provided, multiple submitters, no conflicts |
Genes & proteins
Mendelian disease overlap and somatic drivers
GenCC: 3 · Orphanet: 11 · OMIM-shared: 0 · Dual-evidence (GWAS+Mendelian): 0
GenCC gene–disease validity (cohort genes)
the Disease column is the GenCC-asserted condition — a cohort gene’s strongest validity may be for a related predisposition syndrome.
| Gene | Classification | Inheritance | Disease | Records |
|---|---|---|---|---|
| TAFAZZIN | Definitive | X-linked | Barth syndrome | 3 |
Orphanet rare-disease linkage (cohort genes)
| Gene | Orphanet ID | Rare disease |
|---|---|---|
| TAFAZZIN | Orphanet:111 | Barth syndrome |
| TAFAZZIN | Orphanet:154 | Familial isolated dilated cardiomyopathy |
| LAGE3 | Orphanet:2065 | Galloway-Mowat syndrome |
| IKBKG | Orphanet:464 | Incontinentia pigmenti |
| IKBKG | Orphanet:69088 | Hypohidrotic ectodermal dysplasia-immunodeficiency-osteopetrosis-lymphedema syndrome |
| IKBKG | Orphanet:699605 | NEMO deleted exon 5 autoinflammatory syndrome |
| IKBKG | Orphanet:98813 | Hypohidrotic ectodermal dysplasia with immunodeficiency |
| ABCD1 | Orphanet:139396 | X-linked cerebral adrenoleukodystrophy |
| ABCD1 | Orphanet:139399 | Adrenomyeloneuropathy |
| ABCD1 | Orphanet:369942 | CADDS |
| ABCD1 | Orphanet:388 | Hirschsprung disease |
Cohort genes → proteins
5 cohort genes, 5 distinct canonical proteins.
Evidence partition
| Subset | Genes |
|---|---|
| multi_evidence | 5 |
Cohort genes (full)
| Symbol | HGNC | Ensembl | UniProt | Name | Evidence |
|---|---|---|---|---|---|
| TAFAZZIN | HGNC:11577 | ENSG00000102125 | Q16635 | Tafazzin | gencc,clinvar |
| LAGE3 | HGNC:26058 | ENSG00000196976 | Q14657 | EKC/KEOPS complex subunit LAGE3 | clinvar |
| DNASE1L1 | HGNC:2957 | ENSG00000013563 | P49184 | Deoxyribonuclease-1-like 1 | clinvar |
| IKBKG | HGNC:5961 | ENSG00000269335 | Q9Y6K9 | NF-kappa-B essential modulator | clinvar |
| ABCD1 | HGNC:61 | ENSG00000101986 | P33897 | ATP-binding cassette sub-family D member 1 | clinvar |
Cohort function summary
Lead sentence per gene, UniProt-curated.
| Symbol | Protein name | Function (lead sentence) |
|---|---|---|
| TAFAZZIN | Tafazzin | Acyltransferase required to remodel newly synthesized phospholipid cardiolipin (1’,3’-bis-[1,2-diacyl-sn-glycero-3-phospho]-glycerol or CL), a key component of the mitochondrial inner membrane, with tissue specific acyl chains necessary fo… |
| LAGE3 | EKC/KEOPS complex subunit LAGE3 | Component of the EKC/KEOPS complex that is required for the formation of a threonylcarbamoyl group on adenosine at position 37 (t(6)A37) in tRNAs that read codons beginning with adenine. |
| IKBKG | NF-kappa-B essential modulator | Regulatory subunit of the IKK core complex which phosphorylates inhibitors of NF-kappa-B thus leading to the dissociation of the inhibitor/NF-kappa-B complex and ultimately the degradation of the inhibitor. |
| ABCD1 | ATP-binding cassette sub-family D member 1 | ATP-dependent transporter of the ATP-binding cassette (ABC) family involved in the transport of very long chain fatty acid (VLCFA)-CoA from the cytosol to the peroxisome lumen. |
Protein-family classification
Druggable: 2 · Difficult: 0 · Unknown: 3 · Druggable fraction: 0.4
Family distribution
Cohort families vs a genome-wide background (hypergeometric, BH-FDR; fold = observed/expected). Counts kept; sorted by enrichment, so the catch-all Other/Unknown bucket no longer leads.
| Family | Genes | Fold | FDR |
|---|---|---|---|
| Phosphatase | 1 | 16.8× | 0.094 |
| Transporter | 1 | 15.6× | 0.094 |
| Other/Unknown | 3 | 1.1× | 0.608 |
Per-gene assignment
| Symbol | Family | Druggable? | EC | InterPro (top 3) |
|---|---|---|---|---|
| TAFAZZIN | Other/Unknown | no | Tafazzin, Plipid/glycerol_acylTrfase | |
| LAGE3 | Other/Unknown | no | CTAG/Pcc1 | |
| DNASE1L1 | Phosphatase | yes | Endo/exonuclease/phosphatase, DNase_I, Deoxyribonuclease-1_AS | |
| IKBKG | Other/Unknown | no | NEMO_N, CC2-LZ_dom, NEMO_ZF | |
| ABCD1 | Transporter | yes | 7.6.2.4 | ABC_transporter-like_ATP-bd, AAA+_ATPase, FA_transporter |
Expression context
Cohort genes with no expression data: 0.
5 cohort genes are a single-cell marker in ≥1 SCXA experiment.
Breadth distribution (Bgee present_calls)
| Bucket | Genes |
|---|---|
| narrow (1-5 tissues) | 0 |
| moderate (6-20) | 0 |
| broad (>20) | 5 |
| unknown | 0 |
Top tissues across cohort
| Tissue | Cohort genes |
|---|---|
| granulocyte | 2 |
| apex of heart | 1 |
| lower esophagus mucosa | 1 |
| Brodmann (1909) area 10 | 1 |
| oocyte | 1 |
| secondary oocyte | 1 |
| gastrocnemius | 1 |
| gluteal muscle | 1 |
| hindlimb stylopod muscle | 1 |
| blood | 1 |
| spleen | 1 |
| ileal mucosa | 1 |
| left adrenal gland | 1 |
| left adrenal gland cortex | 1 |
Per-gene tissue summary (top 30)
| Symbol | Bgee breadth | FANTOM5 breadth | SCXA | Top tissues |
|---|---|---|---|---|
| TAFAZZIN | 238 | ubiquitous | marker | apex of heart, granulocyte, lower esophagus mucosa |
| LAGE3 | 273 | ubiquitous | marker | oocyte, secondary oocyte, Brodmann (1909) area 10 |
| DNASE1L1 | 283 | ubiquitous | marker | hindlimb stylopod muscle, gastrocnemius, gluteal muscle |
| IKBKG | 134 | ubiquitous | marker | granulocyte, blood, spleen |
| ABCD1 | 201 | ubiquitous | marker | ileal mucosa, left adrenal gland cortex, left adrenal gland |
Protein interactions among cohort
Intra-cohort edges: 0.
Hub genes (top 10 by interactor count)
| Symbol | Interactor count |
|---|---|
| IKBKG | 4,981 |
| TAFAZZIN | 1,754 |
| ABCD1 | 1,181 |
| DNASE1L1 | 1,012 |
| LAGE3 | 870 |
Structural data
PDB: 3 · AlphaFold-only: 2 · No structure: 0
Cohort genes with PDB structures (top 30)
| Symbol | UniProt | PDB entries |
|---|---|---|
| IKBKG | Q9Y6K9 | 17 |
| ABCD1 | P33897 | 14 |
| LAGE3 | Q14657 | 2 |
AlphaFold-only cohort genes (top 30 by pLDDT)
| Symbol | UniProt | pLDDT |
|---|---|---|
| TAFAZZIN | Q16635 | 94.87 |
| DNASE1L1 | P49184 | 90.83 |
Function
Pathway analysis
Distinct Reactome pathways touched by cohort: 112. Enrichment computed across 5 evidence-associated genes (5 with Reactome annotation).
Pathways by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 5 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| Pathway | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| Protein localization | 2 | 76.1× | 0.030 | TAFAZZIN, ABCD1 |
| Defective ABCD1 causes ALD | 1 | 1142.0× | 0.035 | ABCD1 |
| IKBKB deficiency causes SCID | 1 | 761.3× | 0.035 | IKBKG |
| IKBKG deficiency causes anhidrotic ectodermal dysplasia with immunodeficiency (EDA-ID) (via TLR) | 1 | 761.3× | 0.035 | IKBKG |
| Acyl chain remodeling of CL | 1 | 380.7× | 0.035 | TAFAZZIN |
| alpha-linolenic (omega3) and linoleic (omega6) acid metabolism | 1 | 380.7× | 0.035 | ABCD1 |
| SLC15A4:TASL-dependent IRF5 activation | 1 | 380.7× | 0.035 | IKBKG |
| IkBA variant leads to EDA-ID | 1 | 326.3× | 0.035 | IKBKG |
| Linoleic acid (LA) metabolism | 1 | 228.4× | 0.035 | ABCD1 |
| ZBP1(DAI) mediated induction of type I IFNs | 1 | 207.6× | 0.035 | IKBKG |
| SUMOylation of immune response proteins | 1 | 190.3× | 0.035 | IKBKG |
| Beta-oxidation of very long chain fatty acids | 1 | 175.7× | 0.035 | ABCD1 |
| Diseases of Immune System | 1 | 175.7× | 0.035 | IKBKG |
| Diseases associated with the TLR signaling cascade | 1 | 175.7× | 0.035 | IKBKG |
| NF-kB activation through FADD/RIP-1 pathway mediated by caspase-8 and -10 | 1 | 175.7× | 0.035 | IKBKG |
| Downstream signaling events of B Cell Receptor (BCR) | 1 | 163.1× | 0.035 | IKBKG |
| IRAK1 recruits IKK complex | 1 | 163.1× | 0.035 | IKBKG |
| IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation | 1 | 163.1× | 0.035 | IKBKG |
| alpha-linolenic acid (ALA) metabolism | 1 | 142.8× | 0.035 | ABCD1 |
| MAP3K8 (TPL2)-dependent MAPK1/3 activation | 1 | 142.8× | 0.035 | IKBKG |
| RIP-mediated NFkB activation via ZBP1 | 1 | 134.3× | 0.035 | IKBKG |
| Peroxisomal lipid metabolism | 1 | 134.3× | 0.035 | ABCD1 |
| Regulation of NF-kappa B signaling | 1 | 126.9× | 0.035 | IKBKG |
| ABC transporters in lipid homeostasis | 1 | 120.2× | 0.035 | ABCD1 |
| TICAM1, RIP1-mediated IKK complex recruitment | 1 | 120.2× | 0.035 | IKBKG |
| Modulation of host responses by IFN-stimulated genes | 1 | 120.2× | 0.035 | IKBKG |
| JNK (c-Jun kinases) phosphorylation and activation mediated by activated human TAK1 | 1 | 103.8× | 0.035 | IKBKG |
| Class I peroxisomal membrane protein import | 1 | 103.8× | 0.035 | ABCD1 |
| TCR signaling | 1 | 99.3× | 0.035 | IKBKG |
| activated TAK1 mediates p38 MAPK activation | 1 | 99.3× | 0.035 | IKBKG |
GO biological processes by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 5 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| GO term | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| peroxisomal membrane transport | 1 | 1685.2× | 0.008 | ABCD1 |
| very long-chain fatty-acyl-CoA catabolic process | 1 | 1685.2× | 0.008 | ABCD1 |
| positive regulation of cardiolipin metabolic process | 1 | 1685.2× | 0.008 | TAFAZZIN |
| positive regulation of unsaturated fatty acid biosynthetic process | 1 | 1123.5× | 0.008 | ABCD1 |
| cardiolipin acyl-chain remodeling | 1 | 842.6× | 0.008 | TAFAZZIN |
| sterol homeostasis | 1 | 842.6× | 0.008 | ABCD1 |
| long-chain fatty acid import into peroxisome | 1 | 674.1× | 0.008 | ABCD1 |
| regulation of fatty acid beta-oxidation | 1 | 561.7× | 0.008 | ABCD1 |
| long-chain fatty acid catabolic process | 1 | 561.7× | 0.008 | ABCD1 |
| myelin maintenance | 1 | 561.7× | 0.008 | ABCD1 |
| regulation of mitochondrial depolarization | 1 | 561.7× | 0.008 | ABCD1 |
| tRNA threonylcarbamoyladenosine metabolic process | 1 | 561.7× | 0.008 | LAGE3 |
| fatty acid elongation | 1 | 481.5× | 0.008 | ABCD1 |
| very long-chain fatty acid catabolic process | 1 | 481.5× | 0.008 | ABCD1 |
| establishment of vesicle localization | 1 | 481.5× | 0.008 | IKBKG |
| positive regulation of fatty acid beta-oxidation | 1 | 306.4× | 0.011 | ABCD1 |
| fatty acid derivative biosynthetic process | 1 | 306.4× | 0.011 | ABCD1 |
| anoikis | 1 | 259.3× | 0.011 | IKBKG |
| regulation of cellular response to oxidative stress | 1 | 259.3× | 0.011 | ABCD1 |
| regulation of oxidative phosphorylation | 1 | 240.7× | 0.011 | ABCD1 |
| positive regulation of ATP biosynthetic process | 1 | 240.7× | 0.011 | TAFAZZIN |
| neuron projection maintenance | 1 | 224.7× | 0.011 | ABCD1 |
| DNA metabolic process | 1 | 210.7× | 0.011 | DNASE1L1 |
| cristae formation | 1 | 210.7× | 0.011 | TAFAZZIN |
| negative regulation of reactive oxygen species biosynthetic process | 1 | 198.3× | 0.011 | ABCD1 |
| DNA catabolic process | 1 | 187.2× | 0.011 | DNASE1L1 |
| fatty acid homeostasis | 1 | 187.2× | 0.011 | ABCD1 |
| alpha-linolenic acid metabolic process | 1 | 177.4× | 0.011 | ABCD1 |
| inner mitochondrial membrane organization | 1 | 168.5× | 0.011 | TAFAZZIN |
| tRNA processing | 1 | 168.5× | 0.011 | LAGE3 |
Therapeutics
Drugs indicated for this disease
No approved or late-stage (phase ≥3) drug is indicated for this disease; the following are in earlier-phase trials only.
Earlier-phase candidates (phase 2, investigational — efficacy not yet established): Elamipretide.
Drug target analysis
Approved (phase 4): 0 · Phase ≥3: 0 · Phased (≥1): 0 · Undrugged: 5
Druggability breadth: 3 of 5 evidence-associated genes (60%) have a ChEMBL target (buckets above are over the deeply-mined display cohort).
Top cohort targets by molecule count
| Symbol | Molecules | Max phase |
|---|---|---|
| TAFAZZIN | 0 | 0 |
| LAGE3 | 0 | 0 |
| DNASE1L1 | 0 | 0 |
| IKBKG | 0 | 0 |
| ABCD1 | 0 | 0 |
Bioactivity and enzyme data
Enzyme cohort genes (≥1 EC): 1.
Cohort genes with ChEMBL bioactivity (full, sorted by assay count)
| Symbol | Assays | Type breakdown |
|---|---|---|
| IKBKG | 38 | Binding:30, Functional:8 |
| TAFAZZIN | 1 | Binding:1 |
| LAGE3 | 1 | Binding:1 |
Cohort enzymes (BRENDA EC)
| Symbol | EC numbers | Names |
|---|---|---|
| ABCD1 | 7.6.2.4 | ABC-type fatty-acyl-CoA transporter |
Pharmacogenomics
Cohort genes with a PharmGKB record: 5; with CPIC/DPWG dosing guidelines: 0.
No cohort gene has a CPIC/DPWG genotype-guided dosing guideline (PharmGKB).
Chemical tractability of cohort targets
0 approved/phased compounds have measured bioactivity against a cohort gene (and aren’t yet in disease-level trials). This is a research / tractability signal, NOT a therapeutic recommendation — a bioactivity row often reflects off-target or screening binding (e.g. promiscuous kinase inhibitors against a cohort kinase), implying no disease mechanism.
Druggability pyramid
Cohort genes binned by druggability tier (high → low):
| Tier | Definition | Genes | Symbols |
|---|---|---|---|
| A | Approved (phase 4 drug) | 0 | |
| B | Phased (≥1) drug, not yet approved | 0 | |
| C | Druggable family + PDB, no drug | 1 | ABCD1 |
| D | Druggable family + AlphaFold only, no drug | 1 | DNASE1L1 |
| E | Difficult family or no structure, no drug | 3 | TAFAZZIN, LAGE3, IKBKG |
Undrugged target profiles
5 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).
| Symbol | ChEMBL assays | Drugged partners (top 3) |
|---|---|---|
| TAFAZZIN | 1 | — |
| LAGE3 | 1 | — |
| DNASE1L1 | 0 | — |
| IKBKG | 38 | — |
| ABCD1 | 0 | — |
Clinical trials & evidence
Clinical trials
Clinical trials: 9.
Phase distribution (across all retrieved trials)
| Phase | Trials |
|---|---|
| Not specified | 7 |
| PHASE4 | 1 |
| PHASE2/PHASE3 | 1 |
Top trials by phase / activity
| NCT | Phase | Status | Title |
|---|---|---|---|
| NCT07531251 | PHASE4 | NOT_YET_RECRUITING | Clinical Trial in Patients With Barth Syndrome- 4TAZPower |
| NCT03098797 | PHASE2/PHASE3 | COMPLETED | A Trial to Evaluate Safety, Tolerability and Efficacy of Elamipretide in Subjects With Barth Syndrome |
| NCT03655223 | Not specified | ENROLLING_BY_INVITATION | Early Check: Expanded Screening in Newborns |
| NCT04689360 | Not specified | AVAILABLE | An Intermediate Size Expanded Access Protocol of Elamipretide |
| NCT05554835 | Not specified | RECRUITING | Global Registry and Natural History Study for Mitochondrial Disorders |
| NCT01194141 | Not specified | COMPLETED | Exercise Training in Barth Syndrome |
| NCT01461304 | Not specified | NO_LONGER_AVAILABLE | Compassionate Use of Triheptanoin (C7) for Inherited Disorders of Energy Metabolism |
| NCT01625663 | Not specified | COMPLETED | Heart and Muscle Metabolism in Barth Syndrome |
| NCT01629459 | Not specified | COMPLETED | Resistance Exercise in Barth Syndrome |
Drugs tested across these trials (top 30)
| Molecule | Max phase | Trials referencing |
|---|---|---|
| TRIHEPTANOIN | 4 | 1 |
| ELAMIPRETIDE | 3 | 3 |
Related Atlas pages
- Cohort genes: TAFAZZIN, LAGE3, DNASE1L1, IKBKG, ABCD1
- Drugs: Triheptanoin, Elamipretide