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Gene Symbol ATR
Synonyms FCTCS | FRP1 | MEC1 | SCKL | SCKL1
Gene Description ATR, ATR serine/threonine kinase, is involved in regulation of the DNA damage response and mediation of cell-cycle checkpoints (PMID: 25512053). Loss of function ATR mutations have been identified in melanoma (PMID: 28273450), and inhibition of Atr selectively sensitizes cancerous cells to radiation and chemotherapy (PMID: 23583268, PMID: 31836456, PMID: 29054375).
NCBI Gene ID Chromosome Map Location Canonical Transcript Gene Role
545 3 3q23 NM_001184 Tumor suppressor (PMID: 30606230)

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
ATR over exp chronic lymphocytic leukemia predicted - sensitive Ceralasertib Preclinical Actionable In a preclinical study, chronic lymphocytic leukemia cells expressing ATR were sensitive to AZD6738 (Cancer Res October 1, 2014 74; 5485). detail...
ATR inact mut prostate cancer sensitive Enzalutamide + Talazoparib FDA approved Actionable In a Phase III trial (TALAPRO-2) that supported FDA approval, Talzenna (talazoparib) plus Xtandi (enzalutamide) improved median radiographic progression-free survival compared to enzalutamide plus placebo (27.9 vs 16.4 mo, HR 0.46, p=0.0003) in patients with metastatic castration-resistant prostate cancer harboring deficient homologous recombination repair genes including ATR, with an HR of 0.66 (p=0.12) in patients with non-BRCA mutations treated with Talzenna (talazoparib) (PMID: 37285865; NCT03395197). detail... 37285865
ATR inact mut prostate cancer sensitive Enzalutamide + Talazoparib Guideline Actionable Talzenna (talazoparib) plus Xtandi (enzalutamide) is included in guidelines as systemic therapy for patients with metastatic castration-resistant prostate cancer harboring a pathogenic germline or somatic ATR mutation who have not been treated in the setting of castration-resistant prostate cancer (NCCN.org). detail...
ATR positive breast cancer predicted - sensitive VE-821 Preclinical - Cell culture Actionable In a preclinical study, human breast cancer cell lines demonstrated sensitivity to VE-821 in culture, resulting in decreased cell survival (PMID: 25468710). 25468710
ATR positive lung cancer sensitive Berzosertib + Cisplatin Preclinical - Pdx & cell culture Actionable In a preclinical study, Berzosertib (VX-970) sensitized patient-derived lung cancer cells to Platinol (cisplatin) in culture and in patient-derived xenograft (PDX) models (PMID: 25010037). 25010037
ATM del ATR dec exp Advanced Solid Tumor decreased response PJ34 Preclinical - Cell culture Actionable In a preclinical study, ATM-null transformed cells with decreased Atr expression demonstrated decreased sensitivity to PJ34 in culture (PMID: 21840268). 21840268
ATR del colorectal cancer sensitive E7820 Preclinical - Cell culture Actionable In a preclinical study, E7820 inhibited viability of a colorectal cancer cell line with knockout of ATR in culture (PMID: 38789724). 38789724
ATR del colorectal cancer sensitive Indisulam Preclinical - Cell culture Actionable In a preclinical study, Indisulam (E7070) inhibited viability of a colorectal cancer cell line with knockout of ATR in culture (PMID: 38789724). 38789724