ACTL9
gene geneOn this page
Also known as MGC33407
Summary
ACTL9 (actin like 9, HGNC:28494) is a protein-coding gene on chromosome 19p13.2, encoding Actin-like protein 9 (Q8TC94). Testis-specic protein that plays an important role in fusion of proacrosomal vesicles and perinuclear theca formation.
Involved in acrosome assembly and fertilization. Located in acrosomal vesicle; perinuclear theca; and sperm head. Implicated in spermatogenic failure 53.
Source: NCBI Gene 284382 — RefSeq curated summary.
At a glance
- Gene–disease (curated): spermatogenic failure 53 (Strong, GenCC) — +1 more curated relationship
- GWAS associations: 23
- Clinical variants (ClinVar): 75 total — 3 pathogenic
- Phenotypes (HPO): 3
- MANE Select transcript:
NM_178525
Identifiers
Gene identifiers
| Field | Value |
|---|---|
| HGNC ID | HGNC:28494 |
| Approved symbol | ACTL9 |
| Name | actin like 9 |
| Location | 19p13.2 |
| Locus type | gene with protein product |
| Status | Approved |
| Aliases | MGC33407 |
| Ensembl gene | ENSG00000181786 |
| Ensembl biotype | protein_coding |
| OMIM | 619251 |
| Entrez | 284382 |
Gene structure
Transcript identifiers
Ensembl transcripts: 1 — 1 protein_coding
ENST00000324436
RefSeq mRNA: 1 — MANE Select: NM_178525
NM_178525
CCDS: CCDS12207
Canonical transcript exons
ENST00000324436 — 1 exons
| Exon | Start | End |
|---|---|---|
| ENSE00001227362 | 8697400 | 8698795 |
Expression profiles
Bgee: expression breadth broad, 28 present calls, max score 96.80.
FANTOM5 (CAGE): breadth tissue_specific, TPM avg 0.1494 / max 146.6026, expressed in 3 samples.
FANTOM5 promoters (3 alternative TSS)
| Promoter ID | TPM avg | Samples expressed |
|---|---|---|
| 178973 | 0.0914 | 3 |
| 178972 | 0.0511 | 3 |
| 178971 | 0.0068 | 3 |
Top tissues by expression
215 total, by Bgee expression score (0-100, higher = more expressed):
| Tissue | Anatomy ID | Expression score | Quality |
|---|---|---|---|
| male germ line stem cell (sensu Vertebrata) in testis | CL:0000089 ∩ UBERON:0000473 | 96.80 | gold quality |
| sperm | CL:0000019 | 96.51 | gold quality |
| left testis | UBERON:0004533 | 94.88 | gold quality |
| right testis | UBERON:0004534 | 94.84 | gold quality |
| testis | UBERON:0000473 | 91.73 | gold quality |
| adult organism | UBERON:0007023 | 90.98 | gold quality |
| quadriceps femoris | UBERON:0001377 | 60.42 | gold quality |
| vastus lateralis | UBERON:0001379 | 60.41 | gold quality |
| skeletal muscle tissue of biceps brachii | UBERON:0004502 | 58.52 | gold quality |
| biceps brachii | UBERON:0001507 | 57.22 | gold quality |
| cardiac muscle of right atrium | UBERON:0003379 | 54.34 | gold quality |
| left ventricle myocardium | UBERON:0006566 | 54.23 | gold quality |
| kidney epithelium | UBERON:0004819 | 53.93 | gold quality |
| upper arm skin | UBERON:0004263 | 53.52 | gold quality |
| epithelial cell of pancreas | CL:0000083 | 53.37 | gold quality |
| deltoid | UBERON:0001476 | 53.18 | gold quality |
| tibialis anterior | UBERON:0001385 | 53.12 | silver quality |
| ileal mucosa | UBERON:0000331 | 52.70 | silver quality |
| myocardium | UBERON:0002349 | 50.25 | gold quality |
| amniotic fluid | UBERON:0000173 | 49.55 | silver quality |
| pancreatic ductal cell | CL:0002079 | 49.44 | silver quality |
| skeletal muscle tissue | UBERON:0001134 | 47.83 | gold quality |
| nasal cavity epithelium | UBERON:0005384 | 47.03 | gold quality |
| muscle tissue | UBERON:0002385 | 46.66 | gold quality |
| jejunum | UBERON:0002115 | 45.69 | gold quality |
| cauda epididymis | UBERON:0004360 | 45.59 | silver quality |
| layer of synovial tissue | UBERON:0007616 | 43.55 | gold quality |
| skeletal muscle tissue of rectus abdominis | UBERON:0004511 | 43.37 | gold quality |
| epithelium of nasopharynx | UBERON:0001951 | 42.73 | gold quality |
| secondary oocyte | CL:0000655 | 42.57 | gold quality |
Single-cell (SCXA)
Detected in 1 experiment(s), a significant marker in 0.
| Experiment | Marker? | Max mean expression |
|---|---|---|
| E-ANND-3 | no | 0.20 |
Regulation
Is transcription factor: no
Literature-anchored findings (GeneRIF, showing 4)
- Association of KIF3A, but not OVOL1 and ACTL9, with atopic eczema in Italian patients (PMID:23278845)
- KIF3A and OVOL1, but not ACTL9, are involved in the development of Atopic dermatitis in the Chinese pediatric population. (PMID:26127003)
- Homozygous pathogenic variants in ACTL9 cause fertilization failure and male infertility in humans and mice. (PMID:33626338)
- Identification of a new mutation in the ACTL9 gene in men with unexplained infertility. (PMID:38769899)
Cross-species orthologs
3 orthologs
| Organism | Symbol | Gene ID |
|---|---|---|
| mus_musculus | Actl9 | ENSMUSG00000092519 |
| rattus_norvegicus | Actl9b | ENSRNOG00000026033 |
| rattus_norvegicus | Actl9 | ENSRNOG00000049571 |
Paralogs (26): ACTR6 (ENSG00000075089), ACTB (ENSG00000075624), ACTL6B (ENSG00000077080), ACTR5 (ENSG00000101442), ACTR3C (ENSG00000106526), ACTA2 (ENSG00000107796), ACTR8 (ENSG00000113812), ACTR1B (ENSG00000115073), ACTR3 (ENSG00000115091), ACTL8 (ENSG00000117148), ACTRT1 (ENSG00000123165), ACTR10 (ENSG00000131966), ACTR3B (ENSG00000133627), ACTL6A (ENSG00000136518), ACTR2 (ENSG00000138071), ACTR1A (ENSG00000138107), ACTA1 (ENSG00000143632), ACTL7B (ENSG00000148156), ACTC1 (ENSG00000159251), ACTG2 (ENSG00000163017), ACTBL2 (ENSG00000169067), ACTRT2 (ENSG00000169717), ACTG1 (ENSG00000184009), ACTRT3 (ENSG00000184378), ACTL7A (ENSG00000187003), ACTL10 (ENSG00000288649)
Protein
Protein identifiers
Actin-like protein 9 — Q8TC94 (reviewed: Q8TC94)
All UniProt accessions (1): Q8TC94
UniProt curated annotations — full annotation on UniProt →
Function. Testis-specic protein that plays an important role in fusion of proacrosomal vesicles and perinuclear theca formation.
Subunit / interactions. Interacts with ACTL7A.
Subcellular location. Cytoplasmic vesicle. Secretory vesicle. Acrosome. Cytoplasm. Cytoskeleton. Perinuclear theca.
Tissue specificity. Testis-specific.
Disease relevance. Spermatogenic failure 53 (SPGF53) [MIM:619258] An autosomal recessive infertility disorder characterized by impaired oocyte fertilization due to oocyte activation failure, in association with structural anomalies in sperm heads. The disease is caused by variants affecting the gene represented in this entry.
Similarity. Belongs to the actin family.
RefSeq proteins (1): NP_848620* (*=MANE)
Domains & families (InterPro)
| ID | Name | Type |
|---|---|---|
| IPR004000 | Actin | Family |
| IPR043129 | ATPase_NBD | Homologous_superfamily |
Pfam: PF00022
UniProt features (11 total): sequence variant 8, chain 1, region of interest 1, sequence conflict 1
Structure
Experimental structures (PDB)
0 structures.
Predicted structure (AlphaFold)
| Model | pLDDT | Fraction very-high |
|---|---|---|
| AF-Q8TC94-F1 | 87.56 | 0.74 |
Function
Pathways and Gene Ontology
Reactome pathways
0 pathways
MSigDB gene sets: 54 (showing top):
GOBP_SINGLE_FERTILIZATION, GOCC_SECRETORY_GRANULE, GOBP_VESICLE_ORGANIZATION, GOBP_MALE_GAMETE_GENERATION, GOBP_SECRETORY_GRANULE_ORGANIZATION, GOBP_CELLULAR_COMPONENT_ASSEMBLY_INVOLVED_IN_MORPHOGENESIS, GOBP_ACROSOME_ASSEMBLY, GOBP_ORGANELLE_ASSEMBLY, GOBP_CELLULAR_PROCESS_INVOLVED_IN_REPRODUCTION_IN_MULTICELLULAR_ORGANISM, GOBP_ENDOMEMBRANE_SYSTEM_ORGANIZATION, GOBP_DEVELOPMENTAL_PROCESS_INVOLVED_IN_REPRODUCTION, GOBP_FERTILIZATION, GOCC_SECRETORY_VESICLE, GOCC_ACROSOMAL_VESICLE, chr19p13
GO Biological Process (3): acrosome assembly (GO:0001675), single fertilization (GO:0007338), fertilization (GO:0009566)
GO Molecular Function (1): protein binding (GO:0005515)
GO Cellular Component (7): acrosomal vesicle (GO:0001669), actin cytoskeleton (GO:0015629), perinuclear theca (GO:0033011), sperm head (GO:0061827), cytoplasm (GO:0005737), cytoskeleton (GO:0005856), cytoplasmic vesicle (GO:0031410)
GO top-level categories
Rollup of top GO terms by namespace:
| Category | Terms |
|---|---|
| cytoskeleton | 2 |
| cellular anatomical structure | 2 |
| developmental process involved in reproduction | 1 |
| spermatid development | 1 |
| cellular component assembly involved in morphogenesis | 1 |
| cellular process involved in reproduction in multicellular organism | 1 |
| secretory granule organization | 1 |
| organelle assembly | 1 |
| fertilization | 1 |
| sexual reproduction | 1 |
| reproductive process | 1 |
| binding | 1 |
| secretory granule | 1 |
| perinuclear region of cytoplasm | 1 |
| intracellular anatomical structure | 1 |
| intracellular membraneless organelle | 1 |
| cytoplasm | 1 |
| intracellular vesicle | 1 |
Protein interactions and networks
STRING
1922 interactions, top by confidence (×1000):
| Protein A | Protein B | Partner UniProt | Score |
|---|---|---|---|
| ACTL9 | OVOL1 | O14753 | 620 |
| ACTL9 | OR2Z1 | Q8NG97 | 582 |
| ACTL9 | OR10A3 | P58181 | 573 |
| ACTL9 | TMEM232 | C9JQI7 | 495 |
| ACTL9 | EMSY | Q7Z589 | 479 |
| ACTL9 | ACTRT2 | Q8TDY3 | 478 |
| ACTL9 | KIF3A | Q9Y496 | 447 |
| ACTL9 | SCP2D1 | Q9UJQ7 | 419 |
| ACTL9 | SPATA46 | Q5T0L3 | 405 |
| ACTL9 | ZNF442 | Q9H7R0 | 381 |
| ACTL9 | SLC25A46 | Q96AG3 | 371 |
| ACTL9 | PRR5L | Q6MZQ0 | 370 |
| ACTL9 | ZGPAT | Q8N5A5 | 370 |
| ACTL9 | MTNR1B | P49286 | 359 |
| ACTL9 | FLG | P20930 | 354 |
IntAct
2 interactions, top by confidence:
| A | B | Type | Score |
|---|---|---|---|
| KLHL22 | TRAV18 | psi-mi:“MI:0914”(association) | 0.350 |
BioGRID (2): QRICH1 (Two-hybrid), ACTL9 (Affinity Capture-MS)
ESM2 similar proteins: A0JNU3, A2AKE7, A6H603, A6QQ74, D3ZBP4, F1MH07, O43542, Q149M9, Q2T9W4, Q2TA43, Q2V057, Q32KZ2, Q32L91, Q3ZBE0, Q49HH9, Q49KI5, Q4QR76, Q4R317, Q4R6Q3, Q4R821, Q5JWF8, Q5REQ1, Q5XIK1, Q641W9, Q643R3, Q68FW7, Q6AY16, Q6NVG1, Q76HM9, Q86U10, Q8CG27, Q8K4F6, Q8TC94, Q8TDG2, Q8TDY3, Q8TDZ2, Q8VCZ9, Q8VDP3, Q8VEI3, Q95JK8
Diamond homologs: O94241, P0CM04, P0CM05, Q12509, Q17GZ9, Q4W9M3, Q5AP59, Q6BML9, Q6C982, Q6CJF4, Q6FKE7, Q74ZV8, Q7S6X6, Q8TC94, Q9Y7X8, A2BDB0, O17320, O18499, O18840, O42161, O93400, P02578, P04829, P07836, P07837, P0DM41, P0DM42, P10984, P10986, P10990, P11426, P12716, P12717, P17126, P17304, P27131, P30162, P30163, P45885, P48465
SIGNOR signaling
0 interactions.
Disease & clinical
Clinical variants and AI predictions
ClinVar
75 variants total. Per-class counts are floors (≥ shown; pagination cap):
| Classification | Count (floor) |
|---|---|
| Pathogenic | 3 |
| Likely pathogenic | 0 |
| Uncertain significance | 67 |
| Likely benign | 5 |
| Benign | 0 |
Top pathogenic / likely-pathogenic (3)
| Variant ID | HGVS | Classification |
|---|---|---|
| 1048625 | NM_178525.5(ACTL9):c.1034C>T (p.Ser345Leu) | Pathogenic |
| 1048626 | NM_178525.5(ACTL9):c.1138G>T (p.Val380Leu) | Pathogenic |
| 1048627 | NM_178525.5(ACTL9):c.1209C>G (p.Tyr403Ter) | Pathogenic |
SpliceAI
135 predictions. Top by Δscore:
| Variant | Effect | Δscore |
|---|---|---|
| 19:8698177:CATGG:C | donor_gain | 0.8300 |
| 19:8698134:G:GT | donor_gain | 0.7000 |
| 19:8698176:A:AC | donor_gain | 0.6600 |
| 19:8698177:C:CC | donor_gain | 0.6600 |
| 19:8698090:G:GT | acceptor_gain | 0.5500 |
| 19:8698091:T:TT | acceptor_gain | 0.5500 |
| 19:8698154:A:AC | donor_gain | 0.5100 |
| 19:8698178:A:C | donor_gain | 0.5100 |
| 19:8698353:CG:C | acceptor_gain | 0.5100 |
| 19:8698352:CCG:C | acceptor_gain | 0.4800 |
| 19:8698353:CGC:C | acceptor_gain | 0.4800 |
| 19:8698080:C:CA | acceptor_gain | 0.4700 |
| 19:8698206:C:CT | donor_gain | 0.4700 |
| 19:8698207:C:CT | donor_gain | 0.4600 |
| 19:8698355:C:CC | acceptor_gain | 0.4600 |
| 19:8698211:T:TA | donor_gain | 0.4400 |
| 19:8698083:G:GA | acceptor_gain | 0.4100 |
| 19:8698354:G:GC | acceptor_gain | 0.4100 |
| 19:8698133:C:CT | donor_gain | 0.4000 |
| 19:8698174:G:T | donor_gain | 0.4000 |
| 19:8698070:CC:C | acceptor_gain | 0.3900 |
| 19:8698071:CC:C | acceptor_gain | 0.3900 |
| 19:8698089:TG:T | acceptor_gain | 0.3700 |
| 19:8698072:C:CC | acceptor_gain | 0.3600 |
| 19:8698082:G:GA | acceptor_gain | 0.3600 |
| 19:8697714:T:C | donor_gain | 0.3400 |
| 19:8698068:AGCC:A | acceptor_loss | 0.3400 |
| 19:8698071:CCT:C | acceptor_loss | 0.3400 |
| 19:8698072:C:CG | acceptor_loss | 0.3400 |
| 19:8698073:T:A | acceptor_loss | 0.3400 |
AlphaMissense
0 scored. Top likely-pathogenic:
dbSNP variants (sampled 300 via entrez): RS1000979064 (19:8699063 C>G,T), RS1000983990 (19:8699430 A>G), RS1003583455 (19:8697887 G>A,T), RS1004547213 (19:8698798 G>A,C), RS1005171339 (19:8699013 T>C), RS1009837151 (19:8699490 G>C), RS1010134450 (19:8699703 T>C), RS1013308039 (19:8699050 G>A), RS1014308608 (19:8700569 A>G), RS1015127960 (19:8698810 G>A,T), RS1017904303 (19:8697292 T>A,C,G), RS1019858575 (19:8699497 T>C), RS1019910953 (19:8699740 T>C), RS1023323457 (19:8699053 T>C), RS1024323234 (19:8700586 T>C)
Disease associations
OMIM: gene MIM:619251 | disease phenotypes: MIM:619258
GenCC curated gene-disease
| Disease | Classification | Inheritance |
|---|---|---|
| spermatogenic failure 53 | Strong | Autosomal recessive |
| non-syndromic male infertility due to sperm motility disorder | Supportive | Autosomal recessive |
Mondo (3): spermatogenic failure 53 (MONDO:0030989), breast ductal adenocarcinoma (MONDO:0005590), (MONDO:0017173)
Orphanet (0):
HPO phenotypes
3 total (3 of 3 shown, HPO-id order):
| HPO | Term |
|---|---|
| HP:0000007 | Autosomal recessive inheritance |
| HP:0003251 | Male infertility |
| HP:0032562 | Tapered sperm head |
GWAS associations
23 associations (top):
| Study | Trait | p-value |
|---|---|---|
| GCST001363_2 | Atopic dermatitis | 7.000000e-09 |
| GCST003184_26 | Atopic dermatitis | 2.000000e-11 |
| GCST003184_36 | Atopic dermatitis | 5.000000e-12 |
| GCST003995_23 | Tonsillectomy | 1.000000e-09 |
| GCST004523_10 | Resting metabolic rate | 9.000000e-06 |
| GCST004861_23 | Itch intensity from mosquito bite | 4.000000e-15 |
| GCST004862_161 | Itch intensity from mosquito bite adjusted by bite size | 8.000000e-12 |
| GCST004862_207 | Itch intensity from mosquito bite adjusted by bite size | 5.000000e-09 |
| GCST004865_20 | Itch intensity from mosquito bite adjusted by bite size | 1.000000e-09 |
| GCST005014_21 | Tonsillectomy | 1.000000e-09 |
| GCST005146_46 | Birth weight | 2.000000e-08 |
| GCST007798_108 | Asthma | 9.000000e-07 |
| GCST007800_61 | Asthma (childhood onset) | 5.000000e-10 |
| GCST008362_29 | Birth weight | 1.000000e-08 |
| GCST008362_66 | Birth weight | 1.000000e-08 |
| GCST008363_129 | Offspring birth weight | 6.000000e-25 |
| GCST008363_8 | Offspring birth weight | 2.000000e-25 |
| GCST010984_45 | Allergic disease (asthma, hay fever and/or eczema) (multivariate analysis) | 5.000000e-11 |
| GCST010985_20 | Allergic disease (asthma, hay fever and/or eczema) (age of onset) | 5.000000e-11 |
| GCST90007320_1 | circulating leptin levels adjusted for BMI | 9.000000e-07 |
| GCST90007323_1 | circulating leptin levels adjusted for BMI | 4.000000e-07 |
| GCST90007326_2 | circulating leptin levels adjusted for BMI | 7.000000e-07 |
| GCST90007329_1 | circulating leptin levels adjusted for BMI | 2.000000e-07 |
EFO canonical traits (8, from GWAS)
| EFO ID | Trait name |
|---|---|
| EFO:0007924 | tonsillectomy risk measurement |
| EFO:0008004 | resting metabolic rate measurement |
| EFO:0008377 | mosquito bite reaction itch intensity measurement |
| EFO:0008378 | mosquito bite reaction size measurement |
| EFO:0004344 | birth weight |
| EFO:0005939 | parental genotype effect measurement |
| EFO:0004847 | age at onset |
| EFO:0007793 | BMI-adjusted leptin measurement |
MeSH disease descriptors (1)
| Descriptor | Name | Tree numbers |
|---|---|---|
| D018270 | Carcinoma, Ductal, Breast | C04.557.470.200.025.232.500; C04.557.470.615.132.500; C04.588.180.390; C17.800.090.500.390 |
Drugs & pharmacology
Drug and pharmacology data
Is drug target: no
PharmGKB: 1 entry (VIP=true, CPIC=false)
CTD chemical–gene interactions
7 total (human), top 7 by PubMed support.
| Chemical | Actions (top 5) | PubMed papers |
|---|---|---|
| terbufos | increases methylation | 1 |
| Resveratrol | affects cotreatment, decreases expression | 1 |
| Benzo(a)pyrene | affects methylation, increases methylation | 1 |
| Fonofos | increases methylation | 1 |
| Parathion | increases methylation | 1 |
| Plant Extracts | affects cotreatment, decreases expression | 1 |
| Valproic Acid | increases methylation | 1 |
Clinical trials (associated diseases)
11 trials via MONDO — disease-level, not drug-specific.
| Trial | Phase | Status | Title |
|---|---|---|---|
| NCT03414970 | PHASE3 | ACTIVE_NOT_RECRUITING | Hypofractionated Radiation Therapy After Mastectomy in Preventing Recurrence in Patients With Stage IIa-IIIa Breast Cancer |
| NCT00461344 | PHASE2 | TERMINATED | Docetaxel + Doxorubicin as Neoadjuvant Chemotherapy in Patients With Breast Cancer |
| NCT07499999 | PHASE2 | NOT_YET_RECRUITING | Randomized Double-Blind Phase II Trial of Baby Exemestane Versus Baby Tamoxifen in Post-Menopausal Women at High Risk for Breast Cancer |
| NCT00637364 | PHASE1/PHASE2 | SUSPENDED | High Intensity Focused Ultrasound Tumor Treatment for Pancreatic Cancer Pain |
| NCT02779855 | PHASE1/PHASE2 | COMPLETED | Talimogene Laherparepvec in Combination With Neoadjuvant Chemotherapy in Triple Negative Breast Cancer |
| NCT01753908 | EARLY_PHASE1 | COMPLETED | Broccoli Sprout Extract in Treating Patients With Breast Cancer |
| NCT01796041 | EARLY_PHASE1 | COMPLETED | Intraoperative Imaging of Breast Cancer With Indocyanine Green |
| NCT01208974 | Not specified | ACTIVE_NOT_RECRUITING | Nipple-Areola Complex (NAC) Irradiation After Nipple-Sparing Mastectomy and Reconstruction |
| NCT01875198 | Not specified | TERMINATED | Oncologic Impact of Splenectomy-omitting Radical Pancreatectomy in Well-selected Left-sided Pancreatic Cancer |
| NCT03543397 | Not specified | UNKNOWN | MRI in Ductal Carcinoma in Situ (DCIS) |
| NCT03834532 | Not specified | COMPLETED | Living Well After Breast Surgery |
Related Atlas pages
- Associated diseases: spermatogenic failure 53
- Disease cohort memberships (association, not causation — diseases whose associated-gene cohort lists this gene; a subset are also under Associated diseases): atopic eczema, spermatogenic failure 53