TACSTD2

Chr 1AR

tumor associated calcium signal transducer 2

Also known as: EGP-1, EGP1, GA733-1, GA7331, GP50, M1S1, TROP2

The protein functions as a cell surface receptor that transduces calcium signals and may act as a growth factor receptor. Mutations cause gelatinous drop-like corneal dystrophy, a condition affecting the cornea. This follows autosomal recessive inheritance.

OMIMResearchSummary from RefSeq, OMIM, UniProt
MultiplemechanismAR1 OMIM phenotype
Clinical SummaryTACSTD2
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Clinical Trials
12 active or recruiting trials — potential therapeutic options may be available
Some data sources returned errors (1)

gnomad: TimeoutError: The operation was aborted due to timeout

Population Genetics & Constraint

Constraint data not available from gnomAD.

Curated Mechanism (G2P)Gene2Phenotype (DDG2P) ↗
definitiveTACSTD2-related corneal dystrophy, gelatinous drop-likeOTHERAR

Predictions shown for reference only — model trained on dominant genes, not applicable to AR conditions.

DN
0.6842th %ile
GOF
0.6638th %ile
LOF
0.2970th %ile

The Badonyi & Marsh prediction model was trained exclusively on dominant disease genes. Predictions are not reliable for genes with autosomal recessive inheritance and are shown at reduced opacity for reference only.

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

TACSTD2 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

3D Protein StructureAlphaFold

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

Breast Cancer

Genomic and Transcriptomic Predictors of Sequential SG Sensitivity After T-DXd in ER+/HER2-Low Metastatic Breast Cancer

RECRUITING
NCT06665178Phase PHASE2British Columbia Cancer AgencyStarted 2025-03-31
Sacituzumab Govitecan
Non-small Cell Lung Cancer (NSCLC)

Sacituzumab Tirumotecan (MK-2870) Versus Chemotherapy in Previously Treated Advanced or Metastatic Nonsquamous Non-small Cell Lung Cancer (NSCLC) With EGFR Mutations or Other Genomic Alterations (MK-2870-004)

RECRUITING
NCT06074588Phase PHASE3Merck Sharp & Dohme LLCStarted 2023-11-12
Sacituzumab tirumotecanDocetaxelPemetrexed
Triple Negative Breast Cancer

Sacituzumab Tirumotecan Plus Anlotinib for Metastatic Triple Negative Breast Cancer

NOT YET RECRUITING
NCT07139470Phase PHASE1, PHASE2Tianjin Medical University Cancer Institute and HospitalStarted 2025-08-15
Sacituzumab Tirumotecan + anlotinib
Breast NeoplasmBreast CancerBreast Tumors

Fudan University Shanghai Cancer Center Breast Cancer Precision Platform Series Study- Neoadjuvant Therapy

RECRUITING
NCT05582499Phase PHASE2Fudan UniversityStarted 2022-11-01
DalpiciclibPyrotinibSHR-A1811
Advanced Malignant Solid NeoplasmMetastatic Malignant Solid Neoplasm

Personalized Antibody-Drug Conjugate Therapy Based on RNA and Protein Testing for the Treatment of Advanced or Metastatic Solid Tumors (The ADC MATCH Screening and Treatment Trial)

RECRUITING
NCT06311214Phase PHASE2National Cancer Institute (NCI)Started 2025-03-18
Biopsy ProcedureBiospecimen CollectionComputed Tomography
Lung DiseasesCarcinoma, Non-Small-Cell LungResectable Lung Non-Small Cell Carcinoma

Study of Treatment With Sacituzumab and Zimberelimab for Patients With Lung Cancer Confined to the Chest and Previously Operated on Who Were Not Disease-free.

RECRUITING
NCT06431633Phase PHASE3Fundación GECPStarted 2025-02-04
ZimberelimabSacituzumab govitecanCisplatin
Differentiated Thyroid CancerAnaplastic Thyroid Cancer

Sacituzumab govitEcan in THYroid Cancers

RECRUITING
NCT06235216Phase PHASE2Grupo Espanol de Tumores NeuroendocrinosStarted 2024-09-13
Sacituzumab govitecan
NSCLC Stage IVEGFR Gene Mutation

A Phase II Study of Sacituzumab Tirumotecan in Combination With Furmonertinib in Patients With Non-squamous Non-Small Cell Lung Cancer Who Have Progressed After EGFR-TKI and Platinum-Based Chemotherapy

RECRUITING
NCT07548060Phase PHASE2Tianjin Medical University Cancer Institute and HospitalStarted 2026-02-01
sacituzumab tirumotecan
Advanced Breast Cancer

Sacituzumab Govitecan Plus Bevacizumab in Metastatic TNBC

ENROLLING BY INVITATION
NCT07359404Phase PHASE2YING FANStarted 2024-04-01
Sacituzumab Govitecan (SG)Bevacizumab
Recurrent Platinum-Sensitive Fallopian Tube Endometrioid AdenocarcinomaRecurrent Platinum-Sensitive Fallopian Tube High Grade Serous AdenocarcinomaRecurrent Platinum-Sensitive Ovarian High Grade Endometrioid Adenocarcinoma

Sacituzumab Govitecan With Bevacizumab Compared to Usual Chemotherapy (Carboplatin, Pegylated Liposomal Doxorubicin and Bevacizumab) for Treating Recurrent Platinum-Sensitive Ovarian Cancer After PARP Inhibitor Maintenance Therapy

NOT YET RECRUITING
NCT07504588Phase PHASE2National Cancer Institute (NCI)Started 2026-09-10
Anti-VEGF Monoclonal AntibodyBevacizumabBiospecimen Collection
Bladder (Urothelial, Transitional Cell) Cancer Metastatic or UnresectableUpper Tract Urothelial Cancer

DDR Genes Alteration and Response to Platinum-based Chemotherapy in Advanced Urothelial Cancer.

RECRUITING
NCT06820255Phase PHASE4Fondazione Policlinico Universitario Agostino Gemelli IRCCSStarted 2025-01-07
Platinum + GemcitabineAvelumab first-line maintenanceNGS test for DDR alterations
Resectable Stage II-IIIB NSCLC

A Single-center, Phase II Clinical Trial Evaluating the Efficacy of Sacituzumab Tirumotecan in Combination With Tagitanlimab as Neoadjuvant Therapy for PD-L1-positive, Resectable Stage II to IIIB Non-small Cell Lung Cancer (NSCLC)

NOT YET RECRUITING
NCT07108816Phase PHASE2Henan Cancer HospitalStarted 2025-08-15
Neoadjuvant Sacituzumab tirumotecan + tagitanlimab Followed by adjuvant tagitanlimab
Clinical Literature
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