GLS glutaminase
ENSG00000115419 · protein coding · Open Targets profile
Catalyzes the first reaction in the primary pathway for the renal catabolism of glutamine. Plays a role in maintaining acid-base homeostasis. Regulates the levels of the neurotransmitter glutamate, the main excitatory neurotransmitter in the brain (PubMed:30239721, PubMed:30575854, PubMed:30970188). {ECO:0000269|PubMed:30239721, ECO:0000269|PubMed:30575854, ECO:0000269|PubMed:30970188}.
Each row is a cancer, strongest overall evidence first. The two dots show how strong the inherited (germline) and tumour-mutation (somatic) evidence is; the line between them is the gap.
Scores run from 0 (no evidence) to 1 (strongest). A missing dot at 0 means Open Targets holds no evidence of that kind. Source: Open Targets Platform, fetched live.
Tractability
- Small molecule
- Advanced Clinical, Structure with Ligand, High-Quality Ligand
- PROTAC
- Database Ubiquitination, Half-life Data, Small Molecule Binder
gnomAD loss of function constraint: o/e 0.4153999984264374 (upper bound 0.5485600233078003). Low values mean loss of function is poorly tolerated, a safety flag for inhibition.
Who runs trials of these drugs
Principal investigators and study chairs on 8 registry trials, updated in the last three years, of the most advanced drugs against GLS (telaglenastat), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.
- Dwight H OwenOhio State University Comprehensive Cancer Center LAO · 1 of 1 trials Phase 2+
- Funda Meric-BernstamUniversity of Texas MD Anderson Cancer Center LAO · 1 of 1 trials Phase 2+
- Julie K SchwarzWashington University School of Medicine · 1 of 1 trials Phase 2+
- Michael RisbanoUniversity of Pittsburgh · 1 of 1 trials Phase 2+
- Richard J LeeMassachusetts General Hospital · 1 of 1 trials Phase 2+
- Jonathan W RiessCity of Hope Comprehensive Cancer Center LAO · 0 of 1 trials Phase 2+
- Sani H KizilbashMayo Clinic Cancer Center LAO · 0 of 1 trials Phase 2+
- Wilson I GonsalvesMayo Clinic Cancer Center LAO · 0 of 1 trials Phase 2+
Registry trials of telaglenastat updated in the last three years, counted by the country group of their listed sites. A trial with sites in several groups counts in each; 8 of 8 have all sites in one country.
Site counts are not patients per country, and trials registered only outside ClinicalTrials.gov are not covered. Where sites are is a fact about the record, not a judgement of its quality. Europe is the EU and EEA, the UK and Switzerland. Source: ClinicalTrials.gov, fetched live.
4 trials of drugs against GLS were stopped early
Terminated, withdrawn and suspended interventional trials of telaglenastat, newest update first, live from ClinicalTrials.gov. Each reason is quoted exactly as the registry gives it; we do not sort reasons into safety, efficacy or business. Dates are the last registry update. Showing the 4 most recent of 4.
- withdrawn · 2026-10-20 · Massachusetts General Hospital · Telaglenastat“Calithera pulled out of this trial.”
- terminated · 2023-03-17 · Calithera Biosciences, Inc · matched by the registry's drug synonyms“lack of efficacy”
- terminated · 2022-09-21 · Calithera Biosciences, Inc · Telaglenastat“Lack of Clinical Benefit”
- terminated · 2022-02-17 · Calithera Biosciences, Inc · matched by the registry's drug synonyms“Slow Enrollment”
Paediatric incentives and obligations for GLS's drugs
For telaglenastat: what EMA and FDA publish about paediatric plans, orphan status and pediatric approvals, and how many registered studies take children. Each line is a yes, no or not published fact from the record linked under it; none of it is a forecast.
- FDA pediatric target list: no · GLS is not on the listRule: Target is on FDA's Pediatric Molecular Target List (relevant targets). Source: FDA Pediatric Molecular Target List (Listed as February 2026 on the FDA Pediatric Oncology page; the file served is 9.7.22_the_relevant_molecular_target_list.xlsx, whose Summary of Changes sheet is headed 'SEPTEMBER 2022 UPDATE' (footnote date 2022-09-01)), 2026-11-11
- EU paediatric investigation plan: no · No EMA paediatric investigation plan decision names telaglenastatRule: An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name. Source: EMA data download (dated snapshot), 2026-11-11
- EU orphan designation: no · No EU orphan designation names telaglenastatRule: An EU orphan designation lists the drug as its active substance (exact name) or belongs to a medicine that does; withdrawn and expired designations are listed with their status. Source: EMA data download (dated snapshot), 2026-11-11
- Authorised in the EU: no · EMA lists no centrally authorised medicine of telaglenastatRule: An EMA medicine record lists the drug as its active substance or INN, exact name; national-only authorisations are not in this file. Source: EMA data download (dated snapshot), 2026-11-11
- FDA orphan designation: not published · FDA's orphan designation database turns away automated requests, so this app does not read it; search it by hand at the linkRule: Would be: an FDA orphan designation names the drug. Source: FDA orphan designations search
- FDA pediatric oncology approval: no · FDA's table lists no pediatric approval of telaglenastatRule: FDA's Pediatric Oncology Drug Approvals table names the drug. Source: FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03), 2026-11-12
- Registered studies open to children: yes · 1 interventional studies of telaglenastat include patients under 18; 1 is recruiting, not yet recruiting or activeRule: The registry's age group includes Child (birth to 17 years), which also counts studies that set no minimum age. Source: ClinicalTrials.gov search, 2026-11-12
Rare pediatric disease voucher. FDA, content current as of 29 Apr 2026: “As of February 3, 2026, enactment of the Consolidated Appropriations Act, 2026, the rare pediatric disease PRV program will sunset after September 30, 2029. FDA may not award any PRVs under this program after September 30, 2029.” Voucher sale prices are not shown here; they appear only as company-reported news. FDA: Rare Pediatric Disease Designation and Priority Review Voucher Programs
All 1 drugs and clinical candidates as a table
Each drug, stage and indication links to its Open Targets record, where the trials and approvals behind it are listed. Salt forms (for example a mesylate) are listed as Open Targets records them, as separate entries.
| Drug | Type | Highest stage | Indications | Source records |
|---|---|---|---|---|
| TELAGLENASTAT | Small molecule | phase 2 | breast cancer, renal cell carcinoma, malignant peripheral nerve sheath tumor, non-small cell lung carcinoma, prostate cancer, cervical cancer, melanoma, colorectal cancer, +15 more | Open Targets · ChEMBL |