ISCA2
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Also known as ISA2
Summary
ISCA2 (iron-sulfur cluster assembly 2, HGNC:19857) is a protein-coding gene on chromosome 14q24.3, encoding Iron-sulfur cluster assembly 2 homolog, mitochondrial (Q86U28). Involved in the maturation of mitochondrial 4Fe-4S proteins functioning late in the iron-sulfur cluster assembly pathway. It is a selective cancer dependency (DepMap: 72.9% of cell lines).
The protein encoded by this gene is an A-type iron-sulfur cluster (ISC) protein found in mitochondria. The encoded protein appears to be involved in the maturation of mitochondrial iron-sulfur proteins. Two transcript variants encoding different isoforms have been found for this gene.
Source: NCBI Gene 122961 — RefSeq curated summary.
At a glance
- Gene–disease (curated): mitochondrial disease (Definitive, ClinGen) — +1 more curated relationship
- GWAS associations: 1
- Clinical variants (ClinVar): 98 total — 1 pathogenic, 2 likely-pathogenic
- Phenotypes (HPO): 16
- Cancer dependency (DepMap): dependent in 72.9% of screened cell lines
- MANE Select transcript:
NM_194279
Identifiers
Gene identifiers
| Field | Value |
|---|---|
| HGNC ID | HGNC:19857 |
| Approved symbol | ISCA2 |
| Name | iron-sulfur cluster assembly 2 |
| Location | 14q24.3 |
| Locus type | gene with protein product |
| Status | Approved |
| Aliases | ISA2 |
| Ensembl gene | ENSG00000165898 |
| Ensembl biotype | protein_coding |
| OMIM | 615317 |
| Entrez | 122961 |
Gene structure
Transcript identifiers
Ensembl transcripts: 5 — 4 protein_coding, 1 retained_intron
ENST00000298818, ENST00000554924, ENST00000555139, ENST00000556816, ENST00000857193
RefSeq mRNA: 2 — MANE Select: NM_194279
NM_001272007, NM_194279
CCDS: CCDS32122, CCDS61504
Canonical transcript exons
ENST00000556816 — 4 exons
| Exon | Start | End |
|---|---|---|
| ENSE00001506659 | 74494275 | 74494390 |
| ENSE00002482443 | 74493765 | 74493845 |
| ENSE00002495717 | 74494826 | 74497106 |
| ENSE00003492181 | 74494050 | 74494152 |
Expression profiles
Bgee: expression breadth ubiquitous, 257 present calls, max score 95.93.
FANTOM5 (CAGE): breadth ubiquitous, TPM avg 23.6691 / max 110.6103, expressed in 1817 samples.
FANTOM5 promoters (1 alternative TSS)
| Promoter ID | TPM avg | Samples expressed |
|---|---|---|
| 140575 | 23.6691 | 1817 |
Top tissues by expression
259 total, by Bgee expression score (0-100, higher = more expressed):
| Tissue | Anatomy ID | Expression score | Quality |
|---|---|---|---|
| left ventricle myocardium | UBERON:0006566 | 95.93 | gold quality |
| deltoid | UBERON:0001476 | 94.78 | gold quality |
| cardiac muscle of right atrium | UBERON:0003379 | 94.16 | gold quality |
| tibialis anterior | UBERON:0001385 | 93.69 | gold quality |
| myocardium | UBERON:0002349 | 93.63 | gold quality |
| corpus epididymis | UBERON:0004359 | 93.43 | gold quality |
| quadriceps femoris | UBERON:0001377 | 93.33 | gold quality |
| vastus lateralis | UBERON:0001379 | 93.10 | gold quality |
| kidney epithelium | UBERON:0004819 | 92.81 | gold quality |
| bronchial epithelial cell | CL:0002328 | 92.80 | gold quality |
| right adrenal gland | UBERON:0001233 | 92.70 | gold quality |
| right adrenal gland cortex | UBERON:0035827 | 92.57 | gold quality |
| bronchus | UBERON:0002185 | 92.46 | gold quality |
| ileal mucosa | UBERON:0000331 | 92.34 | gold quality |
| hindlimb stylopod muscle | UBERON:0004252 | 91.91 | gold quality |
| biceps brachii | UBERON:0001507 | 91.89 | gold quality |
| skeletal muscle tissue | UBERON:0001134 | 91.63 | gold quality |
| left adrenal gland | UBERON:0001234 | 91.49 | gold quality |
| primordial germ cell in gonad | CL:0000670 ∩ UBERON:0000991 | 91.45 | gold quality |
| heart left ventricle | UBERON:0002084 | 91.39 | gold quality |
| upper arm skin | UBERON:0004263 | 91.37 | silver quality |
| cardiac ventricle | UBERON:0002082 | 91.30 | gold quality |
| mucosa of transverse colon | UBERON:0004991 | 91.28 | gold quality |
| left adrenal gland cortex | UBERON:0035825 | 91.22 | gold quality |
| adrenal cortex | UBERON:0001235 | 91.18 | gold quality |
| muscle tissue | UBERON:0002385 | 91.07 | gold quality |
| heart right ventricle | UBERON:0002080 | 90.85 | gold quality |
| skeletal muscle tissue of biceps brachii | UBERON:0004502 | 90.79 | gold quality |
| adult mammalian kidney | UBERON:0000082 | 90.69 | gold quality |
| ventricular zone | UBERON:0003053 | 90.45 | gold quality |
Single-cell (SCXA)
Detected in 1 experiment(s), a significant marker in 1.
| Experiment | Marker? | Max mean expression |
|---|---|---|
| E-ANND-3 | yes | 10.39 |
Regulation
Is transcription factor: no
miRNA regulators (miRDB)
35 targeting ISCA2, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):
| miRNA | Max score | Avg score | miRNA target_count |
|---|---|---|---|
| HSA-MIR-5692A | 100.00 | 74.40 | 6850 |
| HSA-MIR-3662 | 99.99 | 73.82 | 5684 |
| HSA-MIR-23A-3P | 99.95 | 74.24 | 3163 |
| HSA-MIR-23B-3P | 99.95 | 74.24 | 3163 |
| HSA-MIR-23C | 99.95 | 73.92 | 3192 |
| HSA-MIR-7162-3P | 99.89 | 68.16 | 1682 |
| HSA-MIR-10393-5P | 99.65 | 68.01 | 1368 |
| HSA-MIR-1249-5P | 99.61 | 66.55 | 2049 |
| HSA-MIR-6797-5P | 99.61 | 66.55 | 2084 |
| HSA-MIR-1207-5P | 99.49 | 69.11 | 2983 |
| HSA-MIR-150-3P | 99.43 | 70.51 | 920 |
| HSA-MIR-208A-5P | 99.42 | 70.83 | 1913 |
| HSA-MIR-208B-5P | 99.42 | 70.83 | 1952 |
| HSA-MIR-548B-3P | 99.38 | 67.26 | 1000 |
| HSA-MIR-3688-5P | 99.12 | 69.67 | 1091 |
| HSA-MIR-4795-5P | 99.11 | 66.90 | 876 |
| HSA-MIR-4763-3P | 99.10 | 67.83 | 2649 |
| HSA-MIR-6868-5P | 99.06 | 65.69 | 1284 |
| HSA-MIR-153-3P | 98.96 | 72.51 | 1644 |
| HSA-MIR-4725-5P | 98.67 | 65.42 | 628 |
| HSA-MIR-504-5P | 98.67 | 65.40 | 631 |
| HSA-MIR-1248 | 98.47 | 67.54 | 1314 |
| HSA-MIR-6870-3P | 98.08 | 65.10 | 692 |
| HSA-MIR-891A-3P | 98.05 | 67.99 | 970 |
| HSA-MIR-4443 | 98.02 | 66.25 | 1928 |
| HSA-MIR-4660 | 97.79 | 67.44 | 1328 |
| HSA-MIR-5196-3P | 97.57 | 65.98 | 979 |
| HSA-MIR-6515-5P | 97.08 | 65.48 | 1219 |
| HSA-MIR-3126-5P | 96.87 | 65.83 | 912 |
| HSA-MIR-6875-5P | 96.87 | 65.49 | 958 |
Functional genomics
DepMap (CRISPR cell-line fitness): dependent in 72.9% of screened cell lines.
Literature-anchored findings (GeneRIF, showing 11)
- ISCA1, ISCA2, and IBA57 were depleted by RNA interference. Depleted cells contained massively swollen and enlarged mitochondria that were virtually devoid of cristae membranes, demonstrating the importance of these proteins for mitochondrial biogenesis. (PMID:22323289)
- The structural plasticity of the dimeric state of the [2Fe-2S] bound form of human GRX5 is the crucial factor that allows an efficient cluster transfer to the partner proteins human ISCA1 and ISCA2 by a specific protein-protein recognition mechanism. (PMID:24733926)
- We identified a homoallelic missense founder mutation in ISCA2 leading to mitochondrial depletion and reduced complex I activity as well as decreased ISCA2, ISCA1 and IBA57 expression in fibroblasts. (PMID:25539947)
- these data indicate loss of ISCA2 impaired function of 4Fe-4S proteins resulting in a fatal encephalopathy accompanied by a relatively unusual combination of features including mtDNA depletion alongside complex II deficiency and hyperglycinemia that may facilitate diagnosis of ISCA2 deficiency patients. (PMID:29297947)
- Structural properties of [2Fe-2S] ISCA2-IBA57: a complex of the mitochondrial iron-sulfur cluster assembly machinery. (PMID:31831856)
- Expanding the genotype-phenotype spectrum of ISCA2-related multiple mitochondrial dysfunction syndrome-cavitating leukoencephalopathy and prolonged survival. (PMID:32424628)
- Characterization and Reconstitution of Human Lipoyl Synthase (LIAS) Supports ISCA2 and ISCU as Primary Cluster Donors and an Ordered Mechanism of Cluster Assembly. (PMID:33562493)
- ISCA1 Orchestrates ISCA2 and NFU1 in the Maturation of Human Mitochondrial [4Fe-4S] Proteins. (PMID:33711344)
- ISCA2 deficiency leads to heme synthesis defects and impaired erythroid differentiation in K562 cells by indirect ROS-mediated IRP1 activation. (PMID:35714932)
- ISCA2 inhibition decreases HIF and induces ferroptosis in clear cell renal carcinoma. (PMID:36097192)
- Copper exerts cytotoxicity through inhibition of iron-sulfur cluster biogenesis on ISCA1/ISCA2/ISCU assembly proteins. (PMID:37225108)
Cross-species orthologs
6 orthologs
| Organism | Symbol | Gene ID |
|---|---|---|
| danio_rerio | isca2 | ENSDARG00000038154 |
| mus_musculus | Isca2 | ENSMUSG00000021241 |
| rattus_norvegicus | Isca2-ps1 | ENSRNOG00000005077 |
| rattus_norvegicus | Isca2 | ENSRNOG00000012085 |
| drosophila_melanogaster | CG13623 | FBGN0039205 |
| caenorhabditis_elegans | WBGENE00013218 |
Paralogs (1): ISCA1 (ENSG00000135070)
Protein
Protein identifiers
Iron-sulfur cluster assembly 2 homolog, mitochondrial — Q86U28 (reviewed: Q86U28)
Alternative names: HESB-like domain-containing protein 1
All UniProt accessions (2): J3QSS7, Q86U28
UniProt curated annotations — full annotation on UniProt →
Function. Involved in the maturation of mitochondrial 4Fe-4S proteins functioning late in the iron-sulfur cluster assembly pathway. May be involved in the binding of an intermediate of Fe/S cluster assembly.
Subunit / interactions. Heterotetramer; forms a dimer of dimers with IBA57. Interacts with [2Fe-2S]-ISCA2 forming the heterodimer [2Fe- 2S]-ISCA2-IBA57 complex; [2Fe-2S] cluster binding is absolutely required to promote the complex formation.
Subcellular location. Mitochondrion.
Disease relevance. Multiple mitochondrial dysfunctions syndrome 4 (MMDS4) [MIM:616370] A severe disorder of systemic energy metabolism, resulting in weakness, respiratory failure, lack of neurologic development, lactic acidosis, hyperglycinemia and early death. The disease is caused by variants affecting the gene represented in this entry.
Similarity. Belongs to the HesB/IscA family.
Isoforms (2)
| UniProt ID | Names | Canonical? |
|---|---|---|
| Q86U28-1 | 1 | yes |
| Q86U28-2 | 2 |
RefSeq proteins (2): NP_001258936, NP_919255* (*=MANE)
Domains & families (InterPro)
| ID | Name | Type |
|---|---|---|
| IPR000361 | ATAP_core_dom | Domain |
| IPR016092 | ATAP | Family |
| IPR017870 | FeS_cluster_insertion_CS | Conserved_site |
| IPR035903 | HesB-like_dom_sf | Homologous_superfamily |
Pfam: PF01521
UniProt features (15 total): mutagenesis site 3, binding site 3, sequence conflict 2, splice variant 2, transit peptide 1, chain 1, region of interest 1, compositionally biased region 1, sequence variant 1
Structure
Experimental structures (PDB)
0 structures.
Predicted structure (AlphaFold)
| Model | pLDDT | Fraction very-high |
|---|---|---|
| AF-Q86U28-F1 | 77.98 | 0.43 |
Functional residue map
Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.
Ligand- & substrate-binding residues (3): 79; 144; 146
Mutagenesis-validated functional residues (3):
| Position | Phenotype |
|---|---|
| 79 | abolishes the formation of the [2fe-2s] isca2-iba57 complex formation. |
| 144 | abolishes the formation of the [2fe-2s] isca2-iba57 complex formation. |
| 146 | abolishes the formation of the [2fe-2s] isca2-iba57 complex formation. |
Function
Pathways and Gene Ontology
Reactome pathways
5 pathways
| ID | Pathway |
|---|---|
| R-HSA-1362409 | Mitochondrial iron-sulfur cluster biogenesis |
| R-HSA-9854311 | Maturation of TCA enzymes and regulation of TCA cycle |
| R-HSA-1428517 | Aerobic respiration and respiratory electron transport |
| R-HSA-1430728 | Metabolism |
| R-HSA-71403 | Citric acid cycle (TCA cycle) |
MSigDB gene sets: 124 (showing top):
LFA1_Q6, GOBP_PROTEIN_MATURATION, chr14q24, AACTTT_UNKNOWN, BURTON_ADIPOGENESIS_5, NUYTTEN_EZH2_TARGETS_DN, GOCC_MITOCHONDRIAL_MATRIX, GOCC_MITOCHONDRIAL_PROTEIN_CONTAINING_COMPLEX, GOMF_METAL_CLUSTER_BINDING, GOMF_IRON_ION_BINDING, GOMF_2_IRON_2_SULFUR_CLUSTER_BINDING, GOMF_4_IRON_4_SULFUR_CLUSTER_BINDING, BOUDOUKHA_BOUND_BY_IGF2BP2, REACTOME_MITOCHONDRIAL_IRON_SULFUR_CLUSTER_BIOGENESIS, ASH1L_TARGET_GENES
GO Biological Process (2): iron-sulfur cluster assembly (GO:0016226), protein maturation (GO:0051604)
GO Molecular Function (7): iron ion binding (GO:0005506), identical protein binding (GO:0042802), 2 iron, 2 sulfur cluster binding (GO:0051537), 4 iron, 4 sulfur cluster binding (GO:0051539), protein binding (GO:0005515), metal ion binding (GO:0046872), iron-sulfur cluster binding (GO:0051536)
GO Cellular Component (3): mitochondrion (GO:0005739), mitochondrial matrix (GO:0005759), mitochondrial [4Fe-4S] assembly complex (GO:0120510)
Reactome top-level categories
Rollup of top-3 pathways:
| Category | Pathways |
|---|---|
| Metabolism | 2 |
| Citric acid cycle (TCA cycle) | 1 |
| Aerobic respiration and respiratory electron transport | 1 |
GO top-level categories
Rollup of top GO terms by namespace:
| Category | Terms |
|---|---|
| iron-sulfur cluster binding | 2 |
| metallo-sulfur cluster assembly | 1 |
| gene expression | 1 |
| protein metabolic process | 1 |
| transition metal ion binding | 1 |
| protein binding | 1 |
| binding | 1 |
| cation binding | 1 |
| metal cluster binding | 1 |
| cytoplasm | 1 |
| intracellular membrane-bounded organelle | 1 |
| mitochondrion | 1 |
| intracellular organelle lumen | 1 |
| mitochondrial protein-containing complex | 1 |
| iron-sulfur cluster assembly complex | 1 |
Protein interactions and networks
STRING
1264 interactions, top by confidence (×1000):
| Protein A | Protein B | Partner UniProt | Score |
|---|---|---|---|
| ISCA2 | IBA57 | Q5T440 | 995 |
| ISCA2 | GLRX5 | Q86SX6 | 947 |
| ISCA2 | ISCA1 | Q9BUE6 | 935 |
| ISCA2 | NFU1 | Q9UMS0 | 892 |
| ISCA2 | ISCU | Q9H1K1 | 879 |
| ISCA2 | LIAS | O43766 | 840 |
| ISCA2 | BOLA3 | Q53S33 | 822 |
| ISCA2 | LYRM4 | Q9HD34 | 806 |
| ISCA2 | FDX2 | Q6P4F2 | 798 |
| ISCA2 | NFS1 | Q9Y697 | 795 |
| ISCA2 | FXN | Q16595 | 787 |
| ISCA2 | BOLA1 | Q9Y3E2 | 775 |
| ISCA2 | NUBPL | Q8TB37 | 758 |
| ISCA2 | ABCB7 | O75027 | 714 |
| ISCA2 | ACO2 | Q99798 | 691 |
IntAct
102 interactions, top by confidence:
| A | B | Type | Score |
|---|---|---|---|
| ISCA2 | IBA57 | psi-mi:“MI:0407”(direct interaction) | 0.860 |
| IBA57 | ISCA2 | psi-mi:“MI:0407”(direct interaction) | 0.860 |
| ISCA2 | psi-mi:“MI:0407”(direct interaction) | 0.820 | |
| ISCA2 | RNF41 | psi-mi:“MI:0915”(physical association) | 0.780 |
| RNF41 | ISCA2 | psi-mi:“MI:0915”(physical association) | 0.780 |
| NHERF2 | PODXL | psi-mi:“MI:0914”(association) | 0.770 |
| ISCA2 | ISCA1 | psi-mi:“MI:0407”(direct interaction) | 0.740 |
| ISCA1 | ISCA2 | psi-mi:“MI:0407”(direct interaction) | 0.740 |
| TEPSIN | AP4M1 | psi-mi:“MI:0914”(association) | 0.700 |
| CDA | LIN7A | psi-mi:“MI:0914”(association) | 0.640 |
| ISCA2 | ISCA2 | psi-mi:“MI:0407”(direct interaction) | 0.620 |
| ISCA2 | psi-mi:“MI:0407”(direct interaction) | 0.620 |
BioGRID (78): ISCA2 (Two-hybrid), ISCA2 (Affinity Capture-MS), ISCA2 (Affinity Capture-MS), ISCA2 (Affinity Capture-MS), ISCA2 (Affinity Capture-MS), ISCA2 (PCA), ISCA2 (Synthetic Lethality), COA7 (Co-fractionation), ISCA2 (Co-fractionation), ISCA2 (Co-fractionation), ISCA2 (Co-fractionation), ISCA2 (Co-fractionation), ISCA2 (Co-fractionation), ISCA2 (Co-fractionation), ISCA2 (Co-fractionation)
ESM2 similar proteins: A6QLY4, A8MPP1, A9NAW9, B5X5B4, D3ZBP4, D3ZX08, F1MH07, O00746, O35952, O43542, O75879, P0DN75, P85094, P87355, Q05B51, Q14CH7, Q2KHV5, Q2TBG7, Q501S4, Q502I6, Q5JTZ9, Q5R788, Q5ZJ74, Q60HD0, Q641W2, Q6AXC6, Q6I7R3, Q6PAY6, Q83AK7, Q86U28, Q8CGK3, Q8K3A0, Q8LBM4, Q8LCY2, Q8NFF5, Q8R035, Q8R086, Q8T3X9, Q8TB37, Q8TDZ2
Diamond homologs: A0K4K7, A0KNY6, A0KZS2, A0Q5J0, A1JJQ3, A1K969, A1RMG3, A1S3U4, A1V053, A2S583, A3D1R9, A3MP61, A3N2B0, A3NZ78, A3QBP0, A4IZA5, A4JBK6, A4SJ82, A4T031, A4Y4G8, A5F947, A5UFF5, A6SUP2, A6WKM0, A7MUU6, A7NDP2, A8H175, A9AH79, A9I246, A9L5J9, B0BR51, B0TIR0, B0TZ08, B0UU19, B1JVU6, B1YTD3, B2AH60, B2JGV0, B2SDK6, B2SYK8
SIGNOR signaling
2 interactions.
| A | Effect | B | Mechanism |
|---|---|---|---|
| ISCA2 | “form complex” | “ISCA2-IBA57 mitochondrial iron-sulfur protein assembly complex” | binding |
| ISCA2 | “form complex” | “ISCA1-ISCA2 mitochondrial iron-sulfur protein assembly complex” | binding |
Disease & clinical
Clinical variants and AI predictions
ClinVar
98 variants total. Per-class counts are floors (≥ shown; pagination cap):
| Classification | Count (floor) |
|---|---|
| Pathogenic | 1 |
| Likely pathogenic | 2 |
| Uncertain significance | 50 |
| Likely benign | 34 |
| Benign | 4 |
Top pathogenic / likely-pathogenic (3)
| Variant ID | HGVS | Classification |
|---|---|---|
| 2288035 | NM_194279.4(ISCA2):c.139G>T (p.Glu47Ter) | Pathogenic |
| 1215027 | NM_194279.4(ISCA2):c.116C>A (p.Ser39Ter) | Likely pathogenic |
| 2581360 | NM_194279.4(ISCA2):c.313A>G (p.Arg105Gly) | Likely pathogenic |
SpliceAI
456 predictions. Top by Δscore:
| Variant | Effect | Δscore |
|---|---|---|
| 14:74493875:GGTGT:G | donor_gain | 0.9900 |
| 14:74493907:GAAAC:G | donor_gain | 0.9900 |
| 14:74494045:CGCA:C | acceptor_loss | 0.9900 |
| 14:74494047:CA:C | acceptor_loss | 0.9900 |
| 14:74494049:G:A | acceptor_loss | 0.9900 |
| 14:74494396:G:GT | donor_gain | 0.9900 |
| 14:74494399:G:GT | donor_gain | 0.9900 |
| 14:74494824:AG:A | acceptor_gain | 0.9900 |
| 14:74494825:GG:G | acceptor_gain | 0.9900 |
| 14:74494825:GGGT:G | acceptor_gain | 0.9900 |
| 14:74493843:CAGG:C | donor_loss | 0.9800 |
| 14:74493844:AG:A | donor_loss | 0.9800 |
| 14:74493845:GGT:G | donor_loss | 0.9800 |
| 14:74493847:T:G | donor_loss | 0.9800 |
| 14:74494048:A:AG | acceptor_gain | 0.9800 |
| 14:74494049:G:GG | acceptor_gain | 0.9800 |
| 14:74494148:TCCAG:T | donor_loss | 0.9800 |
| 14:74494149:CCAG:C | donor_loss | 0.9800 |
| 14:74494150:CAGG:C | donor_loss | 0.9800 |
| 14:74494151:AGG:A | donor_loss | 0.9800 |
| 14:74494152:GGTA:G | donor_loss | 0.9800 |
| 14:74494153:G:GA | donor_loss | 0.9800 |
| 14:74494154:T:A | donor_loss | 0.9800 |
| 14:74494327:G:T | donor_gain | 0.9800 |
| 14:74494419:G:GT | donor_gain | 0.9800 |
| 14:74493843:C:T | donor_gain | 0.9700 |
| 14:74493864:C:T | donor_gain | 0.9700 |
| 14:74494048:AG:A | acceptor_gain | 0.9700 |
| 14:74494049:GG:G | acceptor_gain | 0.9700 |
| 14:74494825:GGGTA:G | acceptor_gain | 0.9700 |
AlphaMissense
983 scored. Top likely-pathogenic:
| Variant | Protein change | am_pathogenicity |
|---|---|---|
| 14:74494930:T:C | F132S | 0.999 |
| 14:74494983:T:C | F150L | 0.999 |
| 14:74494985:C:A | F150L | 0.999 |
| 14:74494985:C:G | F150L | 0.999 |
| 14:74494335:T:C | C79R | 0.998 |
| 14:74494342:G:A | G81E | 0.998 |
| 14:74494858:T:A | V108D | 0.998 |
| 14:74494869:A:C | S112R | 0.998 |
| 14:74494871:C:A | S112R | 0.998 |
| 14:74494871:C:G | S112R | 0.998 |
| 14:74494902:T:C | F123L | 0.998 |
| 14:74494904:C:A | F123L | 0.998 |
| 14:74494904:C:G | F123L | 0.998 |
| 14:74494929:T:C | F132L | 0.998 |
| 14:74494930:T:G | F132C | 0.998 |
| 14:74494931:T:A | F132L | 0.998 |
| 14:74494931:T:G | F132L | 0.998 |
| 14:74494312:G:T | R71M | 0.997 |
| 14:74494335:T:A | C79S | 0.997 |
| 14:74494336:G:C | C79S | 0.997 |
| 14:74494345:T:C | F82S | 0.997 |
| 14:74494984:T:C | F150S | 0.997 |
| 14:74494984:T:G | F150C | 0.997 |
| 14:74494146:C:G | C56W | 0.996 |
| 14:74494312:G:C | R71T | 0.996 |
| 14:74494336:G:A | C79Y | 0.996 |
| 14:74494965:T:C | C144R | 0.996 |
| 14:74494145:G:A | C56Y | 0.995 |
| 14:74494309:T:C | L70P | 0.995 |
| 14:74494313:G:C | R71S | 0.995 |
dbSNP variants (sampled 300 via entrez): RS1000030169 (14:74494298 G>A), RS1000046958 (14:74492214 T>C,G), RS1000498103 (14:74497025 C>G), RS1001728150 (14:74494688 A>G), RS1002340489 (14:74493662 T>C), RS1002389680 (14:74493494 G>A,C,T), RS1003052603 (14:74496417 G>A,C), RS1003345507 (14:74495232 G>T), RS1003397804 (14:74494934 A>G), RS1003671581 (14:74496352 C>G,T), RS1003940857 (14:74496539 A>G), RS1004062569 (14:74497137 C>G,T), RS1005542001 (14:74493689 T>A,C), RS1005573226 (14:74493809 C>G,T), RS1005601150 (14:74493549 C>G,T)
Disease associations
OMIM: gene MIM:615317 | disease phenotypes: MIM:616370, MIM:603513, MIM:612900, MIM:605711
GenCC curated gene-disease
| Disease | Classification | Inheritance |
|---|---|---|
| multiple mitochondrial dysfunctions syndrome 4 | Strong | Autosomal recessive |
ClinGen Gene-Disease Validity (1)
Expert-panel classifications — Definitive > Strong > Moderate > Limited > Disputed > Refuted.
| Disease | Classification | Inheritance |
|---|---|---|
| mitochondrial disease | Definitive | AR |
Mondo (5): multiple mitochondrial dysfunctions syndrome 4 (MONDO:0014611), optic atrophy (MONDO:0003608), neurodegenerative disease (MONDO:0005559), spastic quadriplegic cerebral palsy (MONDO:0016215), fatal multiple mitochondrial dysfunctions syndrome (MONDO:0017338)
Orphanet (3): Multiple mitochondrial dysfunctions syndrome type 4 (Orphanet:457406), Inherited congenital spastic tetraplegia (Orphanet:210141), Multiple mitochondrial dysfunctions syndrome (Orphanet:289573)
HPO phenotypes
16 total (16 of 16 shown, HPO-id order):
| HPO | Term |
|---|---|
| HP:0000007 | Autosomal recessive inheritance |
| HP:0000505 | Visual impairment |
| HP:0000639 | Nystagmus |
| HP:0000648 | Optic atrophy |
| HP:0001257 | Spasticity |
| HP:0001290 | Generalized hypotonia |
| HP:0001344 | Absent speech |
| HP:0001347 | Hyperreflexia |
| HP:0002376 | Developmental regression |
| HP:0002415 | Leukodystrophy |
| HP:0002518 | Abnormal periventricular white matter morphology |
| HP:0003593 | Infantile onset |
| HP:0003676 | Progressive |
| HP:0011923 | Decreased activity of mitochondrial complex I |
| HP:0012736 | Profound global developmental delay |
| HP:0031358 | Vegetative state |
GWAS associations
1 associations (top):
| Study | Trait | p-value |
|---|---|---|
| GCST003457_3 | Soluble receptor for advanced glycation end-product levels | 3.000000e-06 |
EFO canonical traits (1, from GWAS)
| EFO ID | Trait name |
|---|---|
| EFO:0007819 | advanced glycation end-product measurement |
MeSH disease descriptors (3)
| Descriptor | Name | Tree numbers |
|---|---|---|
| D019636 | Neurodegenerative Diseases | C10.574 |
| D009896 | Optic Atrophy | C10.292.700.225; C11.640.451 |
| C565304 | Multiple Mitochondrial Dysfunctions Syndrome (supp.) |
Drugs & pharmacology
Drug and pharmacology data
Is drug target: no
PharmGKB: 1 entry (VIP=true, CPIC=false)
CTD chemical–gene interactions
25 total (human), top 25 by PubMed support.
| Chemical | Actions (top 5) | PubMed papers |
|---|---|---|
| Valproic Acid | affects cotreatment, increases expression, decreases methylation | 3 |
| Particulate Matter | decreases expression, increases abundance | 2 |
| GSK-J4 | decreases expression | 1 |
| glycidyl methacrylate | increases expression | 1 |
| arsenite | increases reaction, affects binding | 1 |
| sodium arsenite | decreases expression | 1 |
| perfluorooctanoic acid | decreases expression | 1 |
| potassium chromate(VI) | affects cotreatment, decreases expression | 1 |
| epigallocatechin gallate | affects cotreatment, decreases expression | 1 |
| di-n-butylphosphoric acid | affects expression | 1 |
| CGP 52608 | increases reaction, affects binding | 1 |
| (4-amino-1,4-dihydro-3-(2-pyridyl)-5-thioxo-1,2,4-triazole)copper(II) | decreases expression | 1 |
| Acetaminophen | increases expression | 1 |
| Air Pollutants | decreases expression, increases abundance | 1 |
| Doxorubicin | decreases expression | 1 |
| Estradiol | decreases expression | 1 |
| Hydralazine | affects cotreatment, increases expression | 1 |
| Rotenone | decreases expression | 1 |
| Testosterone | increases expression | 1 |
| Thiram | decreases expression | 1 |
| Tobacco Smoke Pollution | decreases expression | 1 |
| Urethane | decreases expression | 1 |
| Cyclosporine | decreases expression | 1 |
| Sodium Selenite | increases expression | 1 |
| Copper Sulfate | decreases expression | 1 |
Clinical trials (associated diseases)
212 trials via MONDO — disease-level, not drug-specific.
| Trial | Phase | Status | Title |
|---|---|---|---|
| NCT01662414 | PHASE4 | COMPLETED | Effect of Undenatured Cysteine-Rich Whey Protein Isolate (HMS 90®) in Patients With Parkinson’s Disease |
| NCT04871464 | PHASE4 | UNKNOWN | Role and Mechanism of Probiotics in Improving Motor Symptoms in Mild to Moderate Parkinson’s Disease |
| NCT05357612 | PHASE4 | RECRUITING | Characterization of the Serotonin 2A Receptor Selective PET Tracer [18F]MH.MZ in Patients With Neurodegenerative Diseases |
| NCT05508789 | PHASE3 | ACTIVE_NOT_RECRUITING | A Study of Donanemab (LY3002813) in Participants With Early Symptomatic Alzheimer’s Disease (TRAILBLAZER-ALZ 5) |
| NCT05738486 | PHASE3 | ACTIVE_NOT_RECRUITING | A Study of Different Donanemab (LY3002813) Dosing Regimens in Adults With Early Alzheimer’s Disease (TRAILBLAZER-ALZ 6) |
| NCT06111014 | PHASE3 | TERMINATED | Continuation Study for Latozinemab |
| NCT06672237 | PHASE3 | RECRUITING | A Phase 3 Study of NTLA-2001 in ATTRv-PN |
| NCT00001365 | PHASE2 | COMPLETED | Dextromethorphan for the Treatment of Parkinson’s Disease and Similar Conditions of the Nervous System |
| NCT00406029 | PHASE2 | COMPLETED | Dyskinesia in Parkinson’s Disease (Study P04501) |
| NCT00537017 | PHASE2 | COMPLETED | Follow Up Safety Study of SCH 420814 in Subjects With Parkinson’s Disease (P05175) |
| NCT00907283 | PHASE2 | UNKNOWN | Ferrochelating Treatment in Patients Affected by Neurodegeneration With Brain Iron Accumulation (NBIA) |
| NCT01518374 | PHASE2 | COMPLETED | Clinical Evaluation of Florbetapir F 18 (18F-AV-45) |
| NCT02656498 | PHASE2 | COMPLETED | [18F]THK-5351 Positron Emission Computed Tomography Study of Normal, Mild Cognitive Impairment, Alzheimer’s Disease and Other Neurodegenerative Disease |
| NCT03127514 | PHASE2 | COMPLETED | AMX0035 in Patients With Amyotrophic Lateral Sclerosis (ALS) |
| NCT03538522 | PHASE2 | COMPLETED | A Double-Blind, Placebo-Controlled Safety and Efficacy Study of NA-831 |
| NCT04838301 | PHASE2 | RECRUITING | Allopregnanolone Regenerative Therapeutic for Mild Alzheimer’s Disease |
| NCT04937452 | PHASE2 | COMPLETED | Dopaminergic Therapy for Frontotemporal Dementia Patients |
| NCT05318976 | PHASE2 | COMPLETED | A Study of XPro1595 in Patients With Early Alzheimer’s Disease With Biomarkers of Inflammation |
| NCT05321498 | PHASE2 | WITHDRAWN | Study to Assess the Efficacy of XPro1595 in Patients With Mild Cognitive Impairment With Biomarkers of Inflammation |
| NCT05479981 | PHASE2 | COMPLETED | Extension of AOC 1001-CS1 (MARINA) Study in Adult Myotonic Dystrophy Type 1 (DM1) Patients |
| NCT05522387 | PHASE2 | TERMINATED | An Open-Label Extension of XPro1595 in Patients With Alzheimer’s Disease |
| NCT01064505 | PHASE1 | COMPLETED | Safety Study of a Single IVT Injection of QPI-1007 in Chronic Optic Nerve Atrophy and Recent Onset NAION Patients |
| NCT05147701 | PHASE1 | RECRUITING | Safety of Cultured Allogeneic Adult Umbilical Cord Derived Mesenchymal Stem Cells for NAION |
| NCT00316797 | PHASE1 | COMPLETED | Biodistribution and Safety of a Radiopharmaceutical in Healthy Subjects |
| NCT01758510 | PHASE1 | COMPLETED | Safety Study of HLA-haplo Matched Allogenic Bone Marrow Derived Stem Cell Treatment in Amyotrophic Lateral Sclerosis |
| NCT02267434 | PHASE1 | COMPLETED | Study Assessing Tolerability and Safety of AFFITOPE® PD03A in Patients With Early Parkinson’s Disease |
| NCT02270489 | PHASE1 | COMPLETED | Study Assessing Safety and Therapeutic Activity of AFFITOPE® PD01A and PD03A in Patients With Early MSA |
| NCT03065192 | PHASE1 | COMPLETED | Safety and Efficacy Study of VY-AADC01 for Advanced Parkinson’s Disease |
| NCT04578028 | PHASE1 | COMPLETED | A First in Human Study to Assess the Safety, Tolerability and Pharmacokinetics of ONO-2808-01 in Healthy Participants |
| NCT05143463 | PHASE1 | COMPLETED | A FIH Study to Assess the Safety and Tolerability of NS Intravenous NS101 Infusion |
| NCT05490576 | PHASE1 | UNKNOWN | Tau And Connectomics In TES Study |
| NCT05792163 | PHASE1 | COMPLETED | A First Time in Human Study of SNP318 as a Treatment for Neurodegenerative Diseases Including Alzheimer’s Disease |
| NCT07232147 | PHASE1 | NOT_YET_RECRUITING | Clinical Research on Stem Cell Therapy for Parkinson’s Disease |
| NCT02882477 | PHASE2/PHASE3 | UNKNOWN | Treatment of Wolfram Syndrome Type 2 With the Chelator Deferiprone and Incretin Based Therapy |
| NCT01834079 | PHASE1/PHASE2 | UNKNOWN | Study the Safety and Efficacy of Bone Marrow Derived Autologous Cells for the Treatment of Optic Nerve Disease |
| NCT04680143 | PHASE1/PHASE2 | COMPLETED | Systemic Erythropoietin Injection in Patients Having Optic Atrophy |
| NCT03011541 | Not specified | RECRUITING | Stem Cell Ophthalmology Treatment Study II |
| NCT04580979 | Not specified | COMPLETED | Natural History Study of FDXR Mutation-related Mitochondriopathy |
| NCT04594590 | Not specified | COMPLETED | Natural History Study of SLC25A46 Mutation-related Mitochondriopathy |
| NCT04723160 | Not specified | COMPLETED | Computer Aided Diagnosis of Multiple Eye Fundus Diseases From Color Fundus Photograph |
Related Atlas pages
- Associated diseases: multiple mitochondrial dysfunctions syndrome 4, mitochondrial disease
- Disease cohort memberships (association, not causation — diseases whose associated-gene cohort lists this gene; a subset are also under Associated diseases): fatal multiple mitochondrial dysfunctions syndrome, multiple mitochondrial dysfunctions syndrome 4, neurodegenerative disease, optic atrophy, spastic quadriplegic cerebral palsy