ABI3

gene
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Also known as NESHSSH3BP3

Summary

ABI3 (ABI family member 3, HGNC:29859) is a protein-coding gene on chromosome 17q21.32, encoding ABI gene family member 3 (Q9P2A4). May inhibit tumor metastasis.

This gene encodes a member of an adaptor protein family. Members of this family encode proteins containing a homeobox homology domain, proline rich region and Src-homology 3 (SH3) domain, and are components of the Abi/WAVE complex which regulates actin polymerization. The encoded protein inhibits ectopic metastasis of tumor cells as well as cell migration. This may be accomplished through interaction with p21-activated kinase. Alternative splicing results in multiple transcript variants.

Source: NCBI Gene 51225 — RefSeq curated summary.

At a glance

  • GWAS associations: 6
  • Clinical variants (ClinVar): 80 total — 2 pathogenic
  • MANE Select transcript: NM_016428

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:29859
Approved symbolABI3
NameABI family member 3
Location17q21.32
Locus typegene with protein product
StatusApproved
AliasesNESH, SSH3BP3
Ensembl geneENSG00000108798
Ensembl biotypeprotein_coding
OMIM606363
Entrez51225

Gene structure

Transcript identifiers

Ensembl transcripts: 12 — 12 protein_coding

ENST00000225941, ENST00000419580, ENST00000571035, ENST00000573347, ENST00000881777, ENST00000881778, ENST00000881779, ENST00000881780, ENST00000881781, ENST00000881782, ENST00000881783, ENST00000881784

RefSeq mRNA: 2 — MANE Select: NM_016428 NM_001135186, NM_016428

CCDS: CCDS11546, CCDS45725

Canonical transcript exons

ENST00000225941 — 8 exons

ExonStartEnd
ENSE000007362594922016949220326
ENSE000008197554921653149216698
ENSE000008197574921773949217915
ENSE000008197594921985849219953
ENSE000008197624922209149222225
ENSE000008197634922255249223225
ENSE000010455674921954049219625
ENSE000012875164921070749210841

Expression profiles

Bgee: expression breadth ubiquitous, 189 present calls, max score 97.61.

FANTOM5 (CAGE): breadth broad, TPM avg 7.5270 / max 307.2303, expressed in 766 samples.

FANTOM5 promoters (6 alternative TSS)

Promoter IDTPM avgSamples expressed
1615225.1878546
1615181.1911458
1615260.5205168
1615200.3073154
1615190.161387
1615210.159075

Top tissues by expression

232 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
granulocyteCL:000009497.61gold quality
spleenUBERON:000210694.70gold quality
leukocyteCL:000073894.24gold quality
monocyteCL:000057694.06gold quality
pancreatic ductal cellCL:000207989.66silver quality
bloodUBERON:000017889.57gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047388.38gold quality
vermiform appendixUBERON:000115487.97gold quality
parotid glandUBERON:000183187.32silver quality
apex of heartUBERON:000209886.94gold quality
lymph nodeUBERON:000002986.55gold quality
upper lobe of left lungUBERON:000895285.02gold quality
caecumUBERON:000115384.67gold quality
upper lobe of lungUBERON:000894883.86gold quality
left ventricle myocardiumUBERON:000656683.67gold quality
cardiac muscle of right atriumUBERON:000337983.33gold quality
ileal mucosaUBERON:000033183.13gold quality
small intestine Peyer’s patchUBERON:000345483.12gold quality
mucosa of transverse colonUBERON:000499182.78gold quality
right lungUBERON:000216782.04gold quality
small intestineUBERON:000210882.00gold quality
upper arm skinUBERON:000426380.98gold quality
C1 segment of cervical spinal cordUBERON:000646980.98gold quality
right lobe of thyroid glandUBERON:000111980.62gold quality
omental fat padUBERON:001041480.08gold quality
peritoneumUBERON:000235880.05gold quality
spinal cordUBERON:000224079.94gold quality
heart left ventricleUBERON:000208479.73gold quality
cardiac ventricleUBERON:000208279.58gold quality
left uterine tubeUBERON:000130379.55gold quality

Single-cell (SCXA)

Detected in 7 experiment(s), a significant marker in 5.

ExperimentMarker?Max mean expression
E-HCAD-11yes40.12
E-CURD-112yes19.61
E-CURD-122yes13.34
E-MTAB-8410yes9.49
E-ANND-3yes8.12
E-MTAB-7381no960.69
E-MTAB-6505no659.59

Regulation

Is transcription factor: no

Upstream regulators (CollecTRI, top): HOXA1, NFYB

miRNA regulators (miRDB)

30 targeting ABI3, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-4283100.0066.422097
HSA-MIR-6759-5P99.9966.54785
HSA-MIR-118499.9968.191458
HSA-MIR-6793-5P99.9765.95758
HSA-MIR-426799.9666.532368
HSA-MIR-185-3P99.9567.011743
HSA-MIR-6780A-5P99.8866.692776
HSA-MIR-313399.8170.923506
HSA-MIR-1273H-5P99.7766.322471
HSA-MIR-30B-3P99.7065.762325
HSA-MIR-3689A-3P99.7065.732306
HSA-MIR-3689B-3P99.7065.712311
HSA-MIR-3689C99.7065.712311
HSA-MIR-6779-5P99.7065.762363
HSA-MIR-7106-5P99.5367.473574
HSA-MIR-1207-3P98.9966.221532
HSA-MIR-6829-5P98.8665.121480
HSA-MIR-6846-5P98.8165.861121
HSA-MIR-6848-5P98.8165.491126
HSA-MIR-6852-3P98.5467.601468
HSA-MIR-147098.1163.53399
HSA-MIR-615-5P98.1063.76591
HSA-MIR-64797.7367.79927
HSA-MIR-474197.6964.14883
HSA-MIR-467597.6964.82774
HSA-MIR-4690-3P97.0264.72981
HSA-MIR-568597.0264.341004
HSA-MIR-429696.3563.551233
HSA-MIR-365A-5P94.9163.72471
HSA-MIR-365B-5P94.9163.79470

Literature-anchored findings (GeneRIF, showing 12)

  • Forced expression of NESH suppresses motility and metastatic dissemination of malignant cells. (PMID:11956071)
  • NESH (Abi-3), like Abi-1 and Abi-2, is a component of the Abi/WAVE complex, but likely plays a different role in the regulation of c-Abl. (PMID:17101133)
  • Result links ABI3 to the pathogenesis and progression of some cancers and suggests that ABI3 or its pathway might have interest as therapeutic target. (PMID:21223585)
  • Low ABI3 expression is associated with thyroid carcinomas. (PMID:27036019)
  • Data show that protein-altering changes are in PLCG2, ABI3, and TREM2 genes highly expressed in microglia and highlight an immune-related protein-protein interaction network in Alzheimer’s disease. (PMID:28714976)
  • suggest distinct effects of the microglial genes, ABI3 and PLCG2 in neurodegenerative diseases that harbor significant vs. low/no amyloid ss pathology (PMID:30326945)
  • Study shows that rare coding variants in TREM2, PLCG2, and ABI3 modulate susceptibility to Alzheimer disease in populations from Argentina, and they may have a European heritage. (PMID:30705288)
  • Common Variants in ABI3 Influence Cerebrospinal Fluid Total Tau Levels and Cognitive Decline in Progressive Mild Cognitive Impairment Patients. (PMID:31127786)
  • Examination of the Effect of Rare Variants in TREM2, ABI3, and PLCG2 in LOAD Through Multiple Phenotypes. (PMID:32894242)
  • Association of ABI3 and PLCG2 missense variants with disease risk and neuropathology in Lewy body disease and progressive supranuclear palsy. (PMID:33092647)
  • ABI3 Is a Novel Early Biomarker of Alzheimer’s Disease. (PMID:35275543)
  • Identification and Quantitation of Novel ABI3 Isoforms Relative to Alzheimer’s Disease Genetics and Neuropathology. (PMID:36140776)

Cross-species orthologs

5 orthologs

OrganismSymbolGene ID
danio_rerioabi3bENSDARG00000063283
mus_musculusAbi3ENSMUSG00000018381
rattus_norvegicusAbi3ENSRNOG00000005575
drosophila_melanogasterAbiFBGN0020510
caenorhabditis_elegansWBGENE00015146

Paralogs (2): ABI1 (ENSG00000136754), ABI2 (ENSG00000138443)

Protein

Protein identifiers

ABI gene family member 3Q9P2A4 (reviewed: Q9P2A4)

Alternative names: New molecule including SH3

All UniProt accessions (3): Q9P2A4, I3L1X2, I3L3W4

UniProt curated annotations — full annotation on UniProt →

Function. May inhibit tumor metastasis. In vitro, reduces cell motility.

Subunit / interactions. May interact with PAK1 and PAK2. Probably interacts with TARSH.

Subcellular location. Cytoplasm.

Tissue specificity. Expressed in heart, lung, liver, pancreas, kidney, placenta and at low levels in brain and skeletal muscle.

Similarity. Belongs to the ABI family.

Isoforms (2)

UniProt IDNamesCanonical?
Q9P2A4-11yes
Q9P2A4-22

RefSeq proteins (2): NP_001128658, NP_057512* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR001452SH3_domainDomain
IPR012849Abl-interactor_HHR_domDomain
IPR028455ABI3_SH3Domain
IPR028457ABIFamily
IPR036028SH3-like_dom_sfHomologous_superfamily

Pfam: PF07815, PF14604

UniProt features (13 total): sequence variant 3, modified residue 3, region of interest 2, chain 1, domain 1, coiled-coil region 1, compositionally biased region 1, splice variant 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q9P2A4-F175.310.46

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Post-translational modifications (3): 213, 216, 342

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 266 (showing top): GOBP_DENDRITE_DEVELOPMENT, CREL_01, AP1_01, MODULE_255, GOBP_SYNAPSE_ASSEMBLY, GOBP_DENDRITIC_SPINE_DEVELOPMENT, MODULE_317, GOBP_REGULATION_OF_RUFFLE_ASSEMBLY, GOBP_NEUROGENESIS, GOBP_REGULATION_OF_CELL_JUNCTION_ASSEMBLY, GOBP_CELLULAR_SENESCENCE, GOBP_REGULATION_OF_CELLULAR_COMPONENT_BIOGENESIS, GGGTGGRR_PAX4_03, GOBP_REGULATION_OF_LAMELLIPODIUM_ASSEMBLY, GOBP_PROTEIN_LOCALIZATION_TO_CELL_PERIPHERY

GO Biological Process (12): neuron migration (GO:0001764), defense response to tumor cell (GO:0002357), negative regulation of lamellipodium assembly (GO:0010593), actin cytoskeleton organization (GO:0030036), regulation of cell migration (GO:0030334), cell projection morphogenesis (GO:0048858), regulation of dendritic spine morphogenesis (GO:0061001), modification of postsynaptic actin cytoskeleton (GO:0098885), regulation of postsynaptic density assembly (GO:0099151), negative regulation of ruffle assembly (GO:1900028), negative regulation of protein localization to plasma membrane (GO:1903077), positive regulation of cellular senescence (GO:2000774)

GO Molecular Function (4): signaling adaptor activity (GO:0035591), identical protein binding (GO:0042802), actin filament binding (GO:0051015), protein binding (GO:0005515)

GO Cellular Component (10): cytoplasm (GO:0005737), postsynaptic density (GO:0014069), membrane (GO:0016020), lamellipodium (GO:0030027), SCAR complex (GO:0031209), dendritic spine (GO:0043197), dendritic shaft (GO:0043198), actin-based cell projection (GO:0098858), glutamatergic synapse (GO:0098978), postsynapse (GO:0098794)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure4
cell migration2
negative regulation of plasma membrane bounded cell projection assembly2
plasma membrane bounded cell projection2
dendrite2
synapse2
generation of neurons1
response to tumor cell1
defense response1
regulation of lamellipodium assembly1
lamellipodium assembly1
negative regulation of lamellipodium organization1
cytoskeleton organization1
actin filament-based process1
regulation of cell motility1
cell morphogenesis1
anatomical structure morphogenesis1
cell projection organization1
regulation of neuron projection development1
regulation of anatomical structure morphogenesis1
dendritic spine morphogenesis1
regulation of postsynapse organization1
modification of postsynaptic structure1
postsynaptic density assembly1
regulation of postsynaptic specialization assembly1
regulation of excitatory synapse assembly1
regulation of postsynaptic density organization1
ruffle assembly1
regulation of ruffle assembly1
protein localization to plasma membrane1
regulation of protein localization to plasma membrane1
negative regulation of protein localization to cell periphery1
negative regulation of protein localization to membrane1
positive regulation of cellular process1
cellular senescence1
regulation of cellular senescence1
protein-macromolecule adaptor activity1
protein binding1
actin binding1
protein-containing complex binding1

Protein interactions and networks

STRING

1326 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
ABI3ABI3BPQ7Z7G0998
ABI3CYFIP1Q7L576963
ABI3NCKAP1Q9Y2A7944
ABI3NCKAP1LP55160895
ABI3BRK1Q8WUW1858
ABI3WASF3Q9UPY6804
ABI3WASF1Q92558787
ABI3WASF2Q9Y6W5774
ABI3CYFIP2Q96F07702
ABI3ADGRL1O94910663
ABI3EPS8Q12929661
ABI3KIAA0408Q6ZU52651
ABI3PLCG2P16885645
ABI3TREM2Q9NZC2634
ABI3TYROBPO43914586

IntAct

271 interactions, top by confidence:

ABTypeScore
ABI3NUP58psi-mi:“MI:0915”(physical association)0.780
CEP44ABI3psi-mi:“MI:0915”(physical association)0.780
NUP58ABI3psi-mi:“MI:0915”(physical association)0.780
HOMER3ABI3psi-mi:“MI:0915”(physical association)0.780
ABI3EIF3Hpsi-mi:“MI:0915”(physical association)0.760
HOMER1ABI3psi-mi:“MI:0915”(physical association)0.740
ABI3NCK2psi-mi:“MI:0915”(physical association)0.720
ABI3VASPpsi-mi:“MI:0915”(physical association)0.720
KANK2ABI3psi-mi:“MI:0915”(physical association)0.720
NCK2ABI3psi-mi:“MI:0915”(physical association)0.720
VASPABI3psi-mi:“MI:0915”(physical association)0.720
ABI3KANK2psi-mi:“MI:0915”(physical association)0.720
WASABI3psi-mi:“MI:0915”(physical association)0.670
ABI3EVLpsi-mi:“MI:0915”(physical association)0.670
ABI3WASpsi-mi:“MI:0915”(physical association)0.670
EVLABI3psi-mi:“MI:0915”(physical association)0.670

BioGRID (102): ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid), ABI3 (Two-hybrid)

ESM2 similar proteins: A0A2K3E7S8, A8B1U4, A8I4E9, A8ICS9, A8ID74, A8IF44, A8IGK2, A8IH47, A8INQ0, A8ITV9, A8IUG5, A8J0N6, A8J1V4, A8JAF2, A8JAN3, A8JBB2, A8JID5, A8Q1F0, B0WTU5, B5BUZ8, D4P3R7, F5A894, P0C7L7, P0DL09, P46870, P53787, Q2QPW2, Q2XQY7, Q4PDA7, Q53JI9, Q5Z6N9, Q688R3, Q69T21, Q6R2V6, Q6RCE1, Q750K9, Q751Z6, Q752S4, Q756C3, Q759H4

Diamond homologs: A0A0K3AV08, A1DFN5, A4RF61, A5D7F8, A5D8S5, A7A261, B1V8A0, F1LRS8, G5EC32, O00160, O35179, O35180, O35413, O35964, O42287, O43586, O55043, O77506, O93436, O94868, O94875, P10569, P10686, P29355, P38753, P39743, P43603, P49710, P62484, P70248, P97369, Q01406, Q09746, Q09822, Q14155, Q14247, Q14847, Q15052, Q15811, Q28E95

SIGNOR signaling

1 interactions.

AEffectBMechanism
WWP2“down-regulates quantity by destabilization”ABI3polyubiquitination

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 67 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
Formation of the cornified envelope815.3×2e-05
Keratinization89.7×3e-04

GO biological processes:

GO termPartnersFoldFDR
morphogenesis of an epithelium846.6×1e-09
intermediate filament organization936.7×9e-10
epithelial cell differentiation720.8×6e-06

Disease & clinical

Clinical variants and AI predictions

ClinVar

80 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic2
Likely pathogenic0
Uncertain significance65
Likely benign3
Benign3

Top pathogenic / likely-pathogenic (2)

Variant IDHGVSClassification
154833GRCh38/hg38 17q21.32-21.33(chr17:47986886-49329397)x1Pathogenic
59588GRCh38/hg38 17q21.32-21.33(chr17:48520885-49511208)x1Pathogenic

SpliceAI

1389 predictions. Top by Δscore:

VariantEffectΔscore
17:49217737:AGAT:Aacceptor_gain1.0000
17:49217738:GATG:Gacceptor_gain1.0000
17:49217912:CAAGG:Cdonor_loss1.0000
17:49217914:AGG:Adonor_loss1.0000
17:49217915:GGT:Gdonor_loss1.0000
17:49217917:T:Gdonor_loss1.0000
17:49220332:G:GTdonor_gain1.0000
17:49222088:A:AGacceptor_gain1.0000
17:49222089:A:AGacceptor_gain1.0000
17:49222090:G:GGacceptor_gain1.0000
17:49222197:C:Gdonor_gain1.0000
17:49222548:GCA:Gacceptor_loss1.0000
17:49222549:CA:Cacceptor_loss1.0000
17:49222550:A:AGacceptor_gain1.0000
17:49222550:A:ATacceptor_loss1.0000
17:49222550:AGT:Aacceptor_gain1.0000
17:49222550:AGTG:Aacceptor_gain1.0000
17:49222551:G:GAacceptor_gain1.0000
17:49222551:GT:Gacceptor_gain1.0000
17:49222551:GTG:Gacceptor_gain1.0000
17:49222551:GTGG:Gacceptor_gain1.0000
17:49222551:GTGGT:Gacceptor_gain1.0000
17:49210839:CAGG:Cdonor_loss0.9900
17:49210841:GGTA:Gdonor_loss0.9900
17:49210842:G:GAdonor_loss0.9900
17:49216679:GT:Gdonor_gain0.9900
17:49217734:TGCA:Tacceptor_loss0.9900
17:49217735:GCA:Gacceptor_loss0.9900
17:49217736:CA:Cacceptor_loss0.9900
17:49217737:A:AGacceptor_gain0.9900

AlphaMissense

2324 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
17:49210812:G:CA30P0.997
17:49222684:T:CF357S0.996
17:49216582:G:CA57P0.994
17:49216586:T:CL58P0.994
17:49216616:T:CL68P0.994
17:49222618:T:AI335N0.994
17:49222656:G:CG348R0.994
17:49216591:A:CS60R0.993
17:49216593:C:AS60R0.993
17:49216593:C:GS60R0.993
17:49210813:C:AA30D0.992
17:49210823:C:GC33W0.992
17:49216619:C:AA69D0.992
17:49222600:T:CF329S0.992
17:49222647:T:AW345R0.992
17:49222647:T:CW345R0.992
17:49210801:T:CL26P0.991
17:49216597:G:CA62P0.991
17:49216598:C:AA62D0.991
17:49216618:G:CA69P0.991
17:49217902:G:AG150D0.991
17:49222649:G:CW345C0.991
17:49222649:G:TW345C0.991
17:49222678:G:AG355E0.991
17:49210822:G:AC33Y0.990
17:49216588:G:CA59P0.990
17:49216589:C:AA59D0.990
17:49222569:T:GY319D0.990
17:49217770:G:CR106P0.989
17:49222624:T:AV337D0.989

dbSNP variants (sampled 300 via entrez): RS1000077593 (17:49211711 C>A), RS1000349320 (17:49221035 TGGTGGTGC>T), RS1000464309 (17:49213464 C>T), RS1000830663 (17:49219565 C>T), RS1001094594 (17:49219815 C>A,G), RS1001278347 (17:49220417 C>A,T), RS1001395315 (17:49208863 C>T), RS1001468883 (17:49214974 T>C), RS1001472008 (17:49217094 C>T), RS1001609271 (17:49211141 G>A), RS1001620648 (17:49211409 G>T), RS1001952509 (17:49212551 G>A), RS1001962423 (17:49212720 G>A,C), RS1001963819 (17:49217378 G>A), RS1002305988 (17:49209110 ACCTTG>A)

Disease associations

OMIM: gene MIM:606363 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

6 associations (top):

StudyTraitp-value
GCST001942_17Prostate cancer2.000000e-09
GCST005549_8Alzheimer’s disease (late onset)5.000000e-10
GCST007320_7Alzheimer’s disease or family history of Alzheimer’s disease2.000000e-08
GCST007321_14Family history of Alzheimer’s disease7.000000e-06
GCST008916_126Asthma2.000000e-15
GCST010002_125Refractive error1.000000e-44

EFO canonical traits (2, from GWAS)

EFO IDTrait name
EFO:1001870late-onset Alzheimers disease
EFO:0009268family history of Alzheimer’s disease

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

24 total (human), top 24 by PubMed support.

ChemicalActions (top 5)PubMed papers
Benzo(a)pyrenedecreases expression, increases methylation, increases mutagenesis3
cobaltous chloridedecreases expression2
aristolochic acid Iincreases expression1
GSK-J4decreases expression1
bisphenol Faffects cotreatment, increases expression1
bis(tri-n-butyltin)oxidedecreases expression1
zinc chromateincreases abundance, decreases expression1
ochratoxin Adecreases expression1
aflatoxin B2decreases methylation1
methylmercury IIdecreases expression1
S-(1,2-dichlorovinyl)cysteineaffects response to substance, increases expression, affects cotreatment, decreases expression1
di-n-butylphosphoric acidaffects expression1
chromium hexavalent iondecreases expression, increases abundance1
CGP 52608affects binding, increases reaction1
(+)-JQ1 compounddecreases expression1
Air Pollutants, Occupationaldecreases expression1
Cisplatinincreases expression1
Dexamethasoneaffects cotreatment, increases expression1
Indomethacinaffects cotreatment, increases expression1
Lipopolysaccharidesincreases expression, affects cotreatment, decreases expression, affects response to substance1
Nickeldecreases expression1
Rifampindecreases expression1
Tobacco Smoke Pollutionincreases expression1
1-Methyl-3-isobutylxanthineaffects cotreatment, increases expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.