Gene Variant Detail

Contact

Missing content? – Request curation!

Request curation for specific Genes, Variants, or PubMed publications.

Have questions, comments, or suggestions? - Let us know!

Email us at : ckbsupport@genomenon.com

Gene TSC2
Variant D1656Y
Impact List missense
Protein Effect no effect - predicted
Gene Variant Descriptions TSC2 D1656Y lies within the Rap-GAP domain of the Tsc2 protein (UniProt.org). D1656Y results in noncanonical splicing of Tsc2 in cultured cells (PMID: 31799751), but protein stability and enzymatic activity similar to wild-type Tsc2 in an in vitro assay (PMID: 32502382), inhibition of Mtorc1 signaling similar to wild-type Tsc2 in cultured cells (PMID: 32502382, PMID: 31799751), and interaction with Tsc1 similar to wild-type Tsc2 in cultured cells (PMID: 31799751), and therefore, is predicted to have no effect on Tsc2 protein function.
Associated Drug Resistance
Category Variants Paths

TSC2 mutant TSC2 D1656Y

Filtering

  • Case insensitive filtering will display rows if any text in any cell matches the filter term
  • Use simple literal full or partial string matches
  • Separate multiple filter terms with a space. Any order may be used (i. e. a b c and c b a are equivalent )
  • Filtering will only apply to rows that are already loaded on the page. Filtering has no impact on query parameters.
  • Use quotes to match on a longer phrase with spaces (i.e. "mtor c1483f")

Sorting

  • Generally, the default sort order for tables is set to be first column ascending; however, specific tables may set a different default sort order.
  • Click on any column header arrows to sort by that column
  • Hold down the Shift key and click multiple columns to sort by more than one column. Be sure to set ascending or descending order for a given column before moving on to the next column.

Transcript NM_000548.5
gDNA chr16:g.2086848G>T
cDNA c.4966G>T
Protein p.D1656Y
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_000548.4 chr16:g.2086848G>T c.4966G>T p.D1656Y RefSeq GRCh38/hg38
NM_000548.5 chr16:g.2086848G>T c.4966G>T p.D1656Y RefSeq GRCh38/hg38

Filtering

  • Case insensitive filtering will display rows if any text in any cell matches the filter term
  • Use simple literal full or partial string matches
  • Separate multiple filter terms with a space. Any order may be used (i. e. a b c and c b a are equivalent )
  • Filtering will only apply to rows that are already loaded on the page. Filtering has no impact on query parameters.
  • Use quotes to match on a longer phrase with spaces (i.e. "mtor c1483f")

Sorting

  • Generally, the default sort order for tables is set to be first column ascending; however, specific tables may set a different default sort order.
  • Click on any column header arrows to sort by that column
  • Hold down the Shift key and click multiple columns to sort by more than one column. Be sure to set ascending or descending order for a given column before moving on to the next column.

Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
TSC2 mutant hepatocellular carcinoma decreased response Sorafenib Clinical Study - Cohort Actionable In a clinical case study, Nexavar (sorafenib) treatment of patients with hepatocellular carcinoma harboring Mtor pathway mutations in PIK3CA, PTEN, TSC2, or TSC1 (n=12), resulted in a lower disease control rate (8.3% vs. 40.2%), shorter progression-free survival (1.9 months vs. 5.3 months) and shorter overall survival (10.4 months vs. 17.9 months) compared to patients without mutations in this pathway (n=67) (PMID: 30373752; NCT01775072). 30373752
TSC2 mutant subependymal giant cell astrocytoma predicted - sensitive Everolimus Phase III Actionable In a Phase III trial (EXIST-1), Afinitor (everolimus) treatment resulted in a 50% or more tumor reduction in 35% (27/78) of adult and pediatric patients diagnosed with tuberous sclerosis complex and had subependymal giant cell astrocytoma, compared to 0% (0/39) in the placebo group, 85% (99/117) of the patients harbored mutations in TSC1 and/or TSC2 (PMID: 23158522; NCT00789828). 23158522
TSC2 mutant lung non-small cell carcinoma no benefit Vistusertib Case Reports/Case Series Actionable In a Phase II trial (NLMT), Vistusertib (AZD2014) treatment did not result in a confirmed response (0/5) or durable clinical benefit (0/5) in patients with non-small cell lung cancer harboring TSC1 or TSC2 mutations, thus the cohort was closed due to futility (PMID: 32669708, NCT02664935). 32669708
TSC2 mutant renal cell carcinoma conflicting Everolimus Case Reports/Case Series Actionable In a clinical study, treatment with Afinitor (everolimus) or Torisel (temsirolimus) resulted in more partial responses (odds ratio = 0.08, p=0.030) in patients with renal cell carcinoma harboring mTOR pathway mutations, including MTOR (n=8), TSC1 (n=1), and TSC2 (n=2), than those without mutations (n=76) (PMID: 31335987). 31335987
TSC2 mutant renal cell carcinoma conflicting Everolimus Clinical Study - Cohort Actionable In a retrospective analysis, TSC1, TSC2, or MTOR mutation status was not associated with progression-free survival in renal cell carcinoma patients treated with Afinitor (everolimus) (PMID: 30327302). 30327302
TSC2 mutant renal cell carcinoma predicted - sensitive Temsirolimus Case Reports/Case Series Actionable In a clinical study, treatment with Afinitor (everolimus) or Torisel (temsirolimus) resulted in more partial responses (odds ratio = 0.08, p=0.030) in patients with renal cell carcinoma harboring mTOR pathway mutations, including MTOR (n=8), TSC1 (n=1), and TSC2 (n=2), than those without mutations (n=76) (PMID: 31335987). 31335987
TSC2 mutant osteosarcoma no benefit Temsirolimus Preclinical - Pdx Actionable In a preclinical study, Torisel (temsirolimus) treatment did not improve event-free survival in an osteosarcoma patient-derived xenograft (PDX) model harboring a TSC2 mutation (PMID: 37523146). 37523146
TSC2 mutant osteosarcoma no benefit Irinotecan + Temozolomide + Temsirolimus Case Reports/Case Series Actionable In a clinical case study, Torisel (temsirolimus), Temodar (temozolomide), and Camptosar (irinotecan) combination treatment resulted in progressive disease in a pediatric patient with osteosarcoma harboring a TSC2 mutation (PMID: 37523146; NCT03336931). 37523146