Gene Variant Detail

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Gene ALK
Variant I1171S
Impact List missense
Protein Effect unknown
Gene Variant Descriptions ALK I1171S lies within the protein kinase domain of the Alk protein (UniProt.org). I1171S has been demonstrated to confer drug resistance in the context of ALK fusions in culture (PMID: 27009859, PMID: 25393796, PMID: 26464158), but has not been biochemically characterized and therefore, its effect on Alk protein function is unknown (PubMed, Oct 2020).
Associated Drug Resistance Y

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Transcript NM_004304.4
gDNA chr2:g.29222347A>C
cDNA c.3512T>G
Protein p.I1171S
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_004304.4 chr2:g.29222347A>C c.3512T>G p.I1171S RefSeq GRCh38/hg38
NM_004304 chr2:g.29222347A>C c.3512T>G p.I1171S RefSeq GRCh38/hg38

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  • Simple literal full or partial string matches
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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
EML4 - ALK ALK I1171S Advanced Solid Tumor conflicting Ceritinib Preclinical - Cell culture Actionable In a preclinical study, Zykadia (ceritinib) reduced ALK phosphorylation and inhibited growth of transformed cells expressing EML4-ALK with ALK I1171S in culture (PMID: 31943796). 31943796
EML4 - ALK ALK I1171S Advanced Solid Tumor conflicting Ceritinib Preclinical - Cell culture Actionable In a preclinical study, Zykadia (ceritinib) inhibited growth of transformed cells expressing EML4-ALK with ALK I1171S in culture (PMID: 27432227). 27432227
EML4 - ALK ALK I1171S Advanced Solid Tumor conflicting Ceritinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S were resistant to Zykadia (ceritinib)-mediated growth inhibition in culture (PMID: 27009859). 27009859
EML4 - ALK ALK I1171S Advanced Solid Tumor decreased response TPX-0131 Preclinical - Cell culture Actionable In a preclinical study, TPX-0131 demonstrated reduced growth inhibition of transformed cells expressing ALK I1171S in the context of EML4-ALK in culture (AACR Virtual Annual Meeting II (Jun 2020), Abstract 52226). detail...
EML4 - ALK ALK I1171S Advanced Solid Tumor resistant AZD3463 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S were resistant to AZD3463 mediated growth inhibition in culture (PMID: 27009859). 27009859
EML4 - ALK ALK I1171S Advanced Solid Tumor conflicting Brigatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S were resistant to Alunbrig (brigatinib)-mediated growth inhibition in culture (PMID: 27009859). 27009859
EML4 - ALK ALK I1171S Advanced Solid Tumor conflicting Brigatinib Preclinical - Cell culture Actionable In a preclinical study, Alunbrig (brigatinib) inhibited growth of transformed cells expressing EML4-ALK with ALK I1171S in culture (PMID: 27432227). 27432227
EML4 - ALK ALK I1171S Advanced Solid Tumor conflicting Brigatinib Preclinical - Cell culture Actionable In a preclinical study, Alunbrig (brigatinib) reduced ALK phosphorylation and inhibited growth of transformed cells expressing EML4-ALK with ALK I1171S in culture (PMID: 31943796). 31943796
EML4 - ALK ALK I1171S Advanced Solid Tumor sensitive Lorlatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells co-expressing EML4-ALK and ALK I1171S demonstrated sensitivity to treatment with Lorlatinib (PF-06463922) in culture (PMID: 27432227). 27432227
EML4 - ALK ALK I1171S Advanced Solid Tumor resistant Crizotinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S were resistant to Xalkori (crizotinib) mediated growth inhibition in culture (PMID: 27009859). 27009859
EML4 - ALK ALK I1171S Advanced Solid Tumor resistant Alectinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S were resistant to Alecensa (alectinib) mediated growth inhibition in culture (PMID: 27009859). 27009859
EML4 - ALK ALK I1171S Advanced Solid Tumor resistant ASP3026 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S were resistant to ASP3026 mediated growth inhibition in culture (PMID: 27009859). 27009859
EML4 - ALK ALK I1171S lung non-small cell carcinoma predicted - resistant Alectinib Case Reports/Case Series Actionable In a clinical case study, a patient with EML4-ALK positive non-small cell lung cancer initially responded to Alecensa (alectinib), but progressed with the emergence of a secondary ALK I1171S mutation (PMID: 25393796). 25393796
NPM1 - ALK ALK I1171S Advanced Solid Tumor resistant ASP3026 Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing NPM1-ALK with ALK I1171S were resistant to ASP3026 mediated growth inhibition in culture (PMID: 27009859). 27009859
NPM1 - ALK ALK I1171S Advanced Solid Tumor sensitive AZD3463 Preclinical - Cell culture Actionable In a preclinical study, AZD3463 inhibited the growth of transformed cells expressing NPM1-ALK with ALK I1171S in culture (PMID: 27009859). 27009859
NPM1 - ALK ALK I1171S Advanced Solid Tumor resistant Crizotinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing NPM1-ALK with ALK I1171S were resistant to Xalkori (crizotinib) mediated growth inhibition in culture (PMID: 27009859). 27009859
NPM1 - ALK ALK I1171S anaplastic large cell lymphoma resistant Crizotinib Preclinical - Cell culture Actionable In a preclinical study, human anaplastic large cell lymphoma cell lines harboring NPM1-ALK with ALK I1161S were resistant to Xalkori (crizotinib) in culture (PMID: 27009859). 27009859
NPM1 - ALK ALK I1171S Advanced Solid Tumor sensitive Brigatinib Preclinical - Cell culture Actionable In a preclinical study, Alunbrig (brigatinib) inhibited the growth of transformed cells expressing NPM1-ALK with ALK I1171S in culture (PMID: 27009859). 27009859
NPM1 - ALK ALK I1171S Advanced Solid Tumor resistant Alectinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing NPM1-ALK with ALK I1171S were resistant to Alecensa (alectinib) mediated growth inhibition in culture (PMID: 27009859). 27009859
NPM1 - ALK ALK I1171S Advanced Solid Tumor resistant Ceritinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing NPM1-ALK with ALK I1171S were resistant to Zykadia (ceritinib) mediated growth inhibition in culture (PMID: 27009859). 27009859
EML4 - ALK ALK I1171S ALK F1174V lung non-small cell carcinoma predicted - resistant Alectinib Case Reports/Case Series Actionable In a clinical case study, a non-small cell lung carcinoma patient harboring EML4-ALK and ALK F1174V initially responded to Alecensa (alectinib), but then demonstrated progression in one of two lung nodules, which was found to harbor a secondary resistance mutation, ALK I1171S, and upon resection of the nodule the patient continued Alecensa (alectinib) treatment and achieved complete remission (PMID: 26464158). 26464158
EML4 - ALK ALK I1171S ALK L1196M Advanced Solid Tumor resistant Lorlatinib Preclinical - Cell culture Actionable In a preclinical study, ALK I1171S was identified as a compound mutation in transformed cells expressing ALK L1196M in the context of EML4-ALK that acquired resistance to Lorlatinib (PF-06463922) in culture (PMID: 29650534). 29650534
ALK I1171S ALK pos lung non-small cell carcinoma predicted - sensitive Ensartinib Case Reports/Case Series Actionable In a Phase II clinical trial, Ensartinib (X-396) treatment resulted in an objective response in 50% (2/4, all partial responses) and stable disease in 50% (2/4) of patients with ALK-positive non-small cell lung cancer harboring ALK I1171T (n=3) or I1171S (n=1) (PMID: 31628085; NCT0321569). 31628085
EML4 - ALK ALK I1171S ALK G1269A Advanced Solid Tumor sensitive Ceritinib Preclinical - Cell culture Actionable In a preclinical study, Zykadia (ceritinib) reduced ALK phosphorylation and inhibited growth of transformed cells expressing EML4-ALK with ALK I1171S and ALK G1269A in culture (PMID: 31943796). 31943796
EML4 - ALK ALK I1171S ALK G1269A Advanced Solid Tumor resistant Crizotinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S and ALK G1269A demonstrated resistance to Xalkori (crizotinib) treatment in culture (PMID: 31943796). 31943796
EML4 - ALK ALK I1171S ALK G1269A Advanced Solid Tumor resistant Alectinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S and ALK G1269A demonstrated resistance to Alecensa (alectinib) treatment in culture (PMID: 31943796). 31943796
EML4 - ALK ALK I1171S ALK G1269A Advanced Solid Tumor sensitive Brigatinib Preclinical - Cell culture Actionable In a preclinical study, Alunbrig (brigatinib) reduced ALK phosphorylation and inhibited growth of transformed cells expressing EML4-ALK with ALK I1171S and ALK G1269A in culture (PMID: 31943796). 31943796
EML4 - ALK ALK I1171S ALK G1269A Advanced Solid Tumor resistant Lorlatinib Preclinical - Cell culture Actionable In a preclinical study, transformed cells expressing EML4-ALK with ALK I1171S and ALK G1269A demonstrated resistance to Lorbrena (lorlatinib) treatment in culture (PMID: 31943796). 31943796
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
ALK mutant lung non-small cell carcinoma no benefit Crizotinib + Onalespib Phase II Actionable In a Phase II trial, Onalespib (AT13387) and Xalkori (crizotinib) combination treatment did not significantly improve median progression free survival (269 vs 266 days) or objective response rate (55.4%, 38/68 vs 45.3%, 31/68) compared to Xalkori (crizotinib) single treatment in patients with non-small cell lung carcinoma harboring either an ALK mutation or ALK rearrangement (J Clin Oncol 34, 2016 (suppl; abstr 9059); NCT01712217). detail...
ALK mutant lung non-small cell carcinoma no benefit Belizatinib Phase I Actionable In a Phase I trial, treatment with Belizatinib (TSR-011) in ALK inhibitor-naive non-small cell lung cancer patients (n=14) harboring either an ALK mutation, ALK amplification, or an ALK rearrangement resulted in a partial response in 6 patients and stable disease in 8 patients, however, it was determined that the drug resulted in limited efficacy and development of the drug was discontinued (PMID: 31217479; NCT02048488). 31217479