OCIAD2

gene
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Also known as MGC45416

Summary

OCIAD2 (OCIA domain containing 2, HGNC:28685) is a protein-coding gene on chromosome 4p11, encoding OCIA domain-containing protein 2 (Q56VL3). Has an essential role in the assembly of mitochondrial respiratory chain complex III.

Predicted to be involved in endocytosis; hematopoietic stem cell homeostasis; and positive regulation of receptor signaling pathway via JAK-STAT. Predicted to act upstream of or within response to bacterium. Located in mitochondrion.

Source: NCBI Gene 132299 — RefSeq curated summary.

At a glance

  • GWAS associations: 2
  • Clinical variants (ClinVar): 47 total
  • Druggable target: yes
  • MANE Select transcript: NM_001014446

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:28685
Approved symbolOCIAD2
NameOCIA domain containing 2
Location4p11
Locus typegene with protein product
StatusApproved
AliasesMGC45416
Ensembl geneENSG00000145247
Ensembl biotypeprotein_coding
OMIM619633
Entrez132299

Gene structure

Transcript identifiers

Ensembl transcripts: 24 — 18 protein_coding, 4 protein_coding_CDS_not_defined, 1 nonsense_mediated_decay, 1 retained_intron

ENST00000273860, ENST00000381464, ENST00000506226, ENST00000508069, ENST00000508632, ENST00000510159, ENST00000512087, ENST00000514155, ENST00000514576, ENST00000620187, ENST00000899075, ENST00000899076, ENST00000899077, ENST00000899078, ENST00000899079, ENST00000899080, ENST00000899081, ENST00000899082, ENST00000928706, ENST00000928707, ENST00000928708, ENST00000928709, ENST00000928710, ENST00000928711

RefSeq mRNA: 4 — MANE Select: NM_001014446 NM_001014446, NM_001286773, NM_001286774, NM_152398

CCDS: CCDS33981, CCDS3485

Canonical transcript exons

ENST00000508632 — 7 exons

ExonStartEnd
ENSE000020268874890665848906774
ENSE000020430354888501948885565
ENSE000035605664889982948899925
ENSE000036127064889780448897857
ENSE000036480254889277248892889
ENSE000036583434890448448904611
ENSE000037841624889400648894053

Expression profiles

Bgee: expression breadth ubiquitous, 248 present calls, max score 99.21.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 25.0882 / max 370.2458, expressed in 1633 samples.

FANTOM5 promoters (3 alternative TSS)

Promoter IDTPM avgSamples expressed
5209422.36911603
520952.33671028
520960.3824192

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
kidney epitheliumUBERON:000481999.21gold quality
ileal mucosaUBERON:000033198.97gold quality
ganglionic eminenceUBERON:000402398.65gold quality
embryoUBERON:000092298.64gold quality
cortical plateUBERON:000534398.44gold quality
duodenumUBERON:000211498.06gold quality
adult mammalian kidneyUBERON:000008297.37gold quality
cortex of kidneyUBERON:000122596.87gold quality
islet of LangerhansUBERON:000000696.83gold quality
renal medullaUBERON:000036296.83gold quality
jejunal mucosaUBERON:000039996.81gold quality
mucosa of transverse colonUBERON:000499196.66gold quality
kidneyUBERON:000211396.46gold quality
epithelial cell of pancreasCL:000008396.36gold quality
pancreatic ductal cellCL:000207996.31gold quality
olfactory segment of nasal mucosaUBERON:000538695.75gold quality
nasal cavity epitheliumUBERON:000538495.70gold quality
oviduct epitheliumUBERON:000480495.67gold quality
rectumUBERON:000105295.51gold quality
right lobe of liverUBERON:000111495.45gold quality
thymusUBERON:000237095.36gold quality
liverUBERON:000210795.16gold quality
pituitary glandUBERON:000000794.43gold quality
colonic mucosaUBERON:000031794.43gold quality
caput epididymisUBERON:000435894.38gold quality
gall bladderUBERON:000211094.18gold quality
metanephros cortexUBERON:001053394.08gold quality
nasal cavity mucosaUBERON:000182694.01gold quality
mucosa of sigmoid colonUBERON:000499393.99gold quality
corpus epididymisUBERON:000435993.77gold quality

Single-cell (SCXA)

Detected in 15 experiment(s), a significant marker in 11.

ExperimentMarker?Max mean expression
E-HCAD-15yes910.63
E-MTAB-8271yes218.25
E-HCAD-4yes147.20
E-MTAB-10287yes46.91
E-HCAD-10yes29.16
E-MTAB-8410yes23.91
E-HCAD-5yes20.19
E-MTAB-10042yes15.33
E-CURD-114yes9.17
E-CURD-112yes8.19
E-MTAB-6108no548.69
E-GEOD-124858no274.96
E-MTAB-10018no256.92
E-CURD-120no7.45
E-ANND-3no0.00

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

15 targeting OCIAD2, 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-511-3P99.9968.851467
HSA-MIR-590-3P99.9674.346478
HSA-LET-7C-3P99.9573.422862
HSA-MIR-3177-5P99.6570.381174
HSA-MIR-548AV-5P99.6070.842107
HSA-MIR-548K99.6070.842107
HSA-MIR-1212299.5669.331672
HSA-MIR-203A-3P99.4970.562806
HSA-MIR-805499.4870.812084
HSA-MIR-6739-3P99.2268.841843
HSA-MIR-6847-5P97.9366.741808
HSA-MIR-1212797.9366.67793
HSA-MIR-375-3P97.9165.12483
HSA-MIR-425797.8668.051190
HSA-MIR-428797.5567.241247

Literature-anchored findings (GeneRIF, showing 10)

  • Like OCIAD1, OCIAD2 is a cancer-related protein and its expression level increases during the course of malignant progression and is thought to be a very useful marker for evaluating the malignancy of ovarian mucinous tumors. (PMID:22726067)
  • OCIAD2 also increased the interaction of nicastrin with C99 and stimulated APP processing via gamma-secretase activation, but did not affect Notch processing (PMID:24270855)
  • it well explained the mechanism of TGFbeta induced OCIAD2 expression in cancer microenvironment, therefore providing an important clue for the future functional analysis of OCIAD2 in tumor pathogenesis. (PMID:24949437)
  • these data indicate that reduced expression of OCIAD2 by DNA hypermethylation plays an important role in hepatocellular carcinoma tumor growth and invasion. (PMID:28911005)
  • Our results suggest that OCIAD2 could be a useful prognostic biomarker of lung adenocarcinoma (PMID:30320419)
  • Cellular OCIAD2 protein is a proviral factor for hepatitis C virus replication. (PMID:34371038)
  • Ovarian carcinoma immunoreactive antigen domain 2 controls mitochondrial apoptosis in lung adenocarcinoma. (PMID:34628698)
  • Ovarian carcinoma immunoreactive antigen-like protein 2 (OCIAD2) is a novel complex III-specific assembly factor in mitochondria. (PMID:35080992)
  • Aberrant OCIAD2 demethylation in lung adenocarcinoma is associated with outcome. (PMID:35920378)
  • OCIAD2 promotes pancreatic cancer progression through the AKT signaling pathway. (PMID:38944166)

Cross-species orthologs

4 orthologs

OrganismSymbolGene ID
danio_rerioociad2ENSDARG00000052336
mus_musculusOciad2ENSMUSG00000029153
rattus_norvegicusOciad2ENSRNOG00000002196
drosophila_melanogasterasrijFBGN0034793

Paralogs (1): OCIAD1 (ENSG00000109180)

Protein

Protein identifiers

OCIA domain-containing protein 2Q56VL3 (reviewed: Q56VL3)

Alternative names: Ovarian carcinoma immunoreactive antigen-like protein

All UniProt accessions (3): D6RD77, Q56VL3, J3KPI9

UniProt curated annotations — full annotation on UniProt →

Function. Has an essential role in the assembly of mitochondrial respiratory chain complex III. Is also required for STAT3 activation and plays a role in cell migration.

Subunit / interactions. Interacts (via OCIA domain) with OCIAD1/ASRIJ and STAT3.

Subcellular location. Endosome. Mitochondrion. Mitochondrion inner membrane.

Isoforms (2)

UniProt IDNamesCanonical?
Q56VL3-11yes
Q56VL3-22

RefSeq proteins (4): NP_001014446, NP_001273702, NP_001273703, NP_689611 (=MANE)

Domains & families (InterPro)

IDNameType
IPR009764OCIA_domDomain
IPR040187OCAD1/2Family

Pfam: PF07051

UniProt features (6 total): chain 1, domain 1, region of interest 1, modified residue 1, splice variant 1, sequence variant 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q56VL3-F157.290.00

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 (1): 41

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 137 (showing top): STARK_PREFRONTAL_CORTEX_22Q11_DELETION_DN, GOBP_MITOCHONDRIAL_RESPIRATORY_CHAIN_COMPLEX_ASSEMBLY, GAUSSMANN_MLL_AF4_FUSION_TARGETS_E_UP, GOBP_VESICLE_MEDIATED_TRANSPORT, GOBP_CELL_SURFACE_RECEPTOR_SIGNALING_PATHWAY_VIA_JAK_STAT, BRUECKNER_TARGETS_OF_MIRLET7A3_DN, GOBP_CYTOCHROME_COMPLEX_ASSEMBLY, KOYAMA_SEMA3B_TARGETS_UP, GOCC_MITOCHONDRIAL_ENVELOPE, chr4p11, GOBP_MULTICELLULAR_ORGANISMAL_LEVEL_HOMEOSTASIS, GOBP_IMPORT_INTO_CELL, GOBP_ENDOCYTOSIS, OSMAN_BLADDER_CANCER_DN, NAKAMURA_TUMOR_ZONE_PERIPHERAL_VS_CENTRAL_UP

GO Biological Process (6): endocytosis (GO:0006897), response to bacterium (GO:0009617), cell migration (GO:0016477), mitochondrial respiratory chain complex III assembly (GO:0034551), positive regulation of receptor signaling pathway via JAK-STAT (GO:0046427), hematopoietic stem cell homeostasis (GO:0061484)

GO Molecular Function (1): protein binding (GO:0005515)

GO Cellular Component (6): mitochondrion (GO:0005739), mitochondrial inner membrane (GO:0005743), lysosome (GO:0005764), endosome (GO:0005768), Golgi apparatus (GO:0005794), membrane (GO:0016020)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cytoplasm2
intracellular membrane-bounded organelle2
endomembrane system2
vesicle budding from membrane1
membrane invagination1
vesicle-mediated transport1
import into cell1
response to other organism1
cell motility1
mitochondrion1
respiratory chain complex III assembly1
mitochondrial respiratory chain complex assembly1
cell surface receptor signaling pathway via JAK-STAT1
regulation of receptor signaling pathway via JAK-STAT1
positive regulation of receptor signaling pathway via STAT1
homeostasis of number of cells1
binding1
organelle inner membrane1
mitochondrial membrane1
lytic vacuole1
cytoplasmic vesicle1
cellular anatomical structure1

Protein interactions and networks

STRING

786 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
OCIAD2TIGD4Q8IY51519
OCIAD2DCUN1D4Q92564507
OCIAD2TMEM131LA2VDJ0504
OCIAD2SMIM14Q96QK8489
OCIAD2SYNPO2Q9UMS6472
OCIAD2COMMD8Q9NX08472
OCIAD2TBC1D30Q9Y2I9470
OCIAD2RNF182Q8N6D2469
OCIAD2RNF150Q9ULK6462
OCIAD2NRIP3Q9NQ35460
OCIAD2LHFPL2Q6ZUX7457
OCIAD2GPR180Q86V85448
OCIAD2ARFIP1P53367447
OCIAD2PARP6Q2NL67447
OCIAD2FAM120AOSQ5T036433

IntAct

41 interactions, top by confidence:

ABTypeScore
ANKHFAM234Bpsi-mi:“MI:0914”(association)0.530
KCNIP3OCIAD2psi-mi:“MI:0915”(physical association)0.400
SHFLOCIAD2psi-mi:“MI:0915”(physical association)0.400
TRIP12OCIAD2psi-mi:“MI:0915”(physical association)0.400
KIF20BOCIAD2psi-mi:“MI:0915”(physical association)0.400
TAOK1OCIAD2psi-mi:“MI:0915”(physical association)0.400
CYP3A43OCIAD2psi-mi:“MI:0915”(physical association)0.400
DNAH12OCIAD2psi-mi:“MI:0915”(physical association)0.400
SUPT5HOCIAD2psi-mi:“MI:0915”(physical association)0.400
SIK3OCIAD2psi-mi:“MI:0915”(physical association)0.400
ECEL1OCIAD2psi-mi:“MI:0915”(physical association)0.400
SCINOCIAD2psi-mi:“MI:0915”(physical association)0.400
RPL17OCIAD2psi-mi:“MI:0915”(physical association)0.400
TBC1D14OCIAD2psi-mi:“MI:0915”(physical association)0.400
FAM199XOCIAD2psi-mi:“MI:0915”(physical association)0.400
SENP5OCIAD2psi-mi:“MI:0915”(physical association)0.400
HPF1OCIAD2psi-mi:“MI:0915”(physical association)0.400
OCIAD2reppsi-mi:“MI:0915”(physical association)0.370
S100A9OCIAD2psi-mi:“MI:0915”(physical association)0.370
OCIAD2psi-mi:“MI:0915”(physical association)0.370
TMEM223psi-mi:“MI:0914”(association)0.350
MAPTSHTN1psi-mi:“MI:0914”(association)0.350
SMIM26CNOT1psi-mi:“MI:0914”(association)0.350
TSPAN15TMEM223psi-mi:“MI:0914”(association)0.350
GPR45VWA8psi-mi:“MI:0914”(association)0.350
NAAAHAX1psi-mi:“MI:0914”(association)0.350
MFSD10NDUFS8psi-mi:“MI:0914”(association)0.350
SLC19A2TMEM223psi-mi:“MI:0914”(association)0.350

BioGRID (83): OCIAD2 (Affinity Capture-MS), OCIAD2 (Affinity Capture-MS), OCIAD2 (PCA), OCIAD2 (Affinity Capture-MS), OCIAD2 (Affinity Capture-Western), OCIAD1 (Affinity Capture-Western), OCIAD2 (Affinity Capture-Western), STAT3 (Affinity Capture-Western), VDAC3 (Co-fractionation), OCIAD2 (Co-fractionation), OCIAD2 (Co-fractionation), OCIAD2 (Co-fractionation), OCIAD2 (Co-fractionation), SCCPDH (Co-fractionation), ACOT9 (Co-fractionation)

ESM2 similar proteins: A0A1N7SYS3, A1A619, A3LP48, A9ULX8, B0BN56, D4A2Y9, F1NVK6, F6UF99, O04326, P40508, P82908, P82925, P92204, Q02854, Q04935, Q0P5B1, Q1LVV0, Q28GQ3, Q28HF6, Q28X44, Q2UDY8, Q3SYY7, Q3V0J1, Q56VL3, Q5I030, Q5R891, Q5XI29, Q61733, Q659C4, Q66IE4, Q68EU0, Q6AZH0, Q6BI17, Q6CHT7, Q6CJX5, Q6DFB7, Q6DFJ8, Q6NYD7, Q6PFM4, Q75D23

Diamond homologs: A1A619, Q28GQ3, Q28X44, Q3SYY7, Q56VL3, Q5E948, Q5RD48, Q5XIG4, Q6NYD7, Q9CRD0, Q9D8W7, Q9NX40, Q9W1X9

SIGNOR signaling

0 interactions.

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance29
Likely benign2
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

984 predictions. Top by Δscore:

VariantEffectΔscore
4:48906653:CTCA:Cdonor_loss1.0000
4:48906654:TCACC:Tdonor_loss1.0000
4:48906655:CAC:Cdonor_loss1.0000
4:48906656:A:ATdonor_loss1.0000
4:48906657:C:Adonor_loss1.0000
4:48892890:C:CCacceptor_gain0.9900
4:48904612:C:CCacceptor_gain0.9900
4:48906652:GCTCA:Gdonor_loss0.9900
4:48906656:A:ACdonor_gain0.9900
4:48906657:C:CCdonor_gain0.9900
4:48892887:CAA:Cacceptor_gain0.9800
4:48894004:A:ACdonor_gain0.9800
4:48894005:C:CCdonor_gain0.9800
4:48897122:T:TAdonor_gain0.9800
4:48897163:AGG:Adonor_gain0.9800
4:48906657:CCT:Cdonor_gain0.9800
4:48894005:CGTG:Cdonor_gain0.9700
4:48906656:AC:Adonor_gain0.9700
4:48906657:CC:Cdonor_gain0.9700
4:48892886:GCAAC:Gacceptor_loss0.9600
4:48892887:CAACT:Cacceptor_loss0.9600
4:48892888:AAC:Aacceptor_loss0.9600
4:48892889:AC:Aacceptor_loss0.9600
4:48892890:C:Tacceptor_loss0.9600
4:48892891:T:Gacceptor_loss0.9600
4:48904486:G:Adonor_gain0.9600
4:48906657:CCTG:Cdonor_gain0.9600
4:48906657:CCTGT:Cdonor_gain0.9600
4:48885564:GCCTA:Gacceptor_loss0.9500
4:48885565:CCTAG:Cacceptor_loss0.9500

AlphaMissense

999 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
4:48897835:G:CS62R0.993
4:48897835:G:TS62R0.993
4:48897837:T:GS62R0.993
4:48899855:C:GC46S0.976
4:48899856:A:TC46S0.976
4:48892838:C:GC106S0.968
4:48892839:A:TC106S0.968
4:48899842:A:CS50R0.968
4:48899842:A:TS50R0.968
4:48899844:T:GS50R0.968
4:48892874:C:TG94E0.964
4:48892883:C:TG91D0.964
4:48892886:G:TA90D0.961
4:48899856:A:GC46R0.961
4:48899830:T:AR54S0.959
4:48899830:T:GR54S0.959
4:48892875:C:GG94R0.958
4:48892875:C:TG94R0.958
4:48892863:C:GG98R0.957
4:48892863:C:TG98R0.957
4:48897833:A:TM63K0.957
4:48899839:G:CF51L0.957
4:48899839:G:TF51L0.957
4:48899841:A:GF51L0.957
4:48897827:A:TV65D0.955
4:48894013:T:AK86N0.953
4:48894013:T:GK86N0.953
4:48892862:C:TG98E0.952
4:48892839:A:GC106R0.951
4:48892868:C:TG96D0.951

dbSNP variants (sampled 300 via entrez): RS1000236018 (4:48908700 G>A), RS1000517012 (4:48901156 A>G), RS1000978863 (4:48884635 A>C), RS1001347907 (4:48902098 T>C), RS1001419327 (4:48908375 G>C), RS1001539987 (4:48890004 G>A), RS1002357488 (4:48889274 G>C), RS1002692959 (4:48888203 C>T), RS1002928303 (4:48901037 A>C,G), RS1003024697 (4:48900801 C>T), RS1003252414 (4:48893951 G>A,C), RS1003266996 (4:48899307 C>G), RS1003423558 (4:48906062 A>G), RS1003444115 (4:48900669 G>T), RS1003499276 (4:48907233 T>G)

Disease associations

OMIM: gene MIM:619633 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

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

GWAS associations

2 associations (top):

StudyTraitp-value
GCST007094_157Diastolic blood pressure6.000000e-06
GCST007099_37Systolic blood pressure2.000000e-08

EFO canonical traits (2, from GWAS)

EFO IDTrait name
EFO:0006336diastolic blood pressure
EFO:0006335systolic blood pressure

Drugs & pharmacology

Drug and pharmacology data

Is drug target: yes

ChEMBL targets (1): CHEMBL6066320 (SINGLE PROTEIN)

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

ChEMBL bioactivities

2 potent at pChembl≥5 of 2 total, top 2 by pChembl (potency: 10 = 0.1 nM, 6 = 1 µM).

pChemblTypeValueUnitMolecule
5.49Kd3242nMCHEMBL5653589
5.49ED503242nMCHEMBL5653589

PubChem BioAssay actives

1 with measured affinity, of 2 total; 1 most potent distinct compounds. Largely complementary to BindingDB; screening values are coarse (µM, 4 dp), so sub-nM hits tie at the floor.

CompoundAssayTypeValueUnit
4-methyl-3-[(2-methyl-6-pyridin-3-ylpyrazolo[3,4-d]pyrimidin-4-yl)amino]-N-[3-(trifluoromethyl)phenyl]benzamide2148910: Binding affinity to human OCIAD2 incubated for 45 mins by Kinobead based pull down assaykd3.2416uM

CTD chemical–gene interactions

48 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
bisphenol Adecreases expression, affects cotreatment2
Acetaminophendecreases expression2
Air Pollutantsaffects cotreatment, increases abundance, increases expression, decreases expression2
Phenylmercuric Acetateaffects cotreatment, increases expression2
Valproic Acidaffects cotreatment, increases expression, increases methylation2
GSK-J4increases expression1
methylmercuric chlorideincreases expression1
alpha-pineneaffects cotreatment, increases expression, increases abundance1
beta-lapachonedecreases expression, increases expression1
arseniteaffects binding, increases reaction1
sodium arseniteincreases expression1
perfluorooctanoic acidincreases expression1
potassium chromate(VI)decreases expression1
methacrylaldehydeaffects cotreatment, increases expression, increases abundance1
beta-methylcholineaffects expression1
perfluorooctane sulfonic acidincreases expression1
chloropicrinincreases expression1
2-palmitoylglycerolincreases expression1
4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamideaffects cotreatment, increases expression1
belinostatdecreases expression1
dorsomorphinincreases expression, affects cotreatment1
(+)-JQ1 compounddecreases expression1
4-(4-((5-(4,5-dimethyl-2-nitrophenyl)-2-furanyl)methylene)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzoic acidincreases expression1
Decitabineaffects expression1
Sunitinibdecreases expression1
Acroleinincreases abundance, affects cotreatment, increases expression1
Benzo(a)pyrenedecreases methylation1
Carbamazepineaffects expression1
Cisplatinaffects expression1
Dexamethasoneaffects cotreatment, decreases expression1

ChEMBL screening assays

1 unique, capped per target: 1 binding

Representative assays (with source publication via chembl_document):

Assay IDTypeDescriptionSource paper
CHEMBL5651952BindingBinding affinity to human OCIAD2 incubated for 45 mins by Kinobead based pull down assayNVP-BHG712: Effects of Regioisomers on the Affinity and Selectivity toward the EPHrin Family. — ChemMedChem

Cellosaurus cell lines

3 cell lines: 3 embryonic stem cell

First 10 cell lines (id-ordered, not curated):

CellosaurusNameCategorySex
CVCL_C6Q6BJNhem20-OCIAD2-CRISPR-33Embryonic stem cellFemale
CVCL_C6Q7BJNhem20-OCIAD2-CRISPR-40Embryonic stem cellFemale
CVCL_C6Q8BJNhem20-OCIAD2-OVEmbryonic stem cellFemale

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.