Full data view for gene TSC2

The curator’s expert opinion on the classification of a variant, can be found in the
SUMMARY record. Regarding the classification, please note that where there are several
records of the same variant, the classification of that variant may differ depending on the
submitter’s conclusion.
Information The variants shown are described using the NM_000548.3 transcript reference sequence.

6 entries on 1 page. Showing entries 1 - 6.
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+/. 34 c.4490C>T - p.Pro1497Leu - - Unknown - NA g.2134713C>T g.2084712C>T - - TSC2_002451 T389/S6K ratio significantly increased compared to wild type TSC2; TSC1 and TSC2 signals not significantly different compared to wild type; variant disrupts TSC2 function; classified as pathogenic Nellist, personal communication - - In vitro (cloned) - - - - - - - - - - - - - - - - - - - - - - -
+/. 34 c.4490C>T r.(?) p.(Pro1497Leu) - - Unknown - pathogenic g.2134713C>T g.2084712C>T - - TSC2_002451 Germline variant also seen in shagreen patch; confirmed by SNaPshot; normal skin MAF = 0.09, MAF in blood = 0.19; tumour MAF in freq column; blood or saliva also tested; NGS median read-depth of >5000x PubMed: Tyburczy, 2014 - - Somatic - 0.03 +DdeI, -BsaJI - - DNA SEQ-NG-I, SEQ Tumour, Normal Skin SNapshot TSC P19 PubMed: Tyburczy, 2014 childhood onset and adult diagnosis of TSC; patient has TSC2 germline c.4490C>T and TSC2 somatic variant c.759C>A F - - - - - - - 1 Rosemary Ekong
+/. 34 c.4490C>T r.(?) p.(Pro1497Leu) - - Unknown - pathogenic g.2134713C>T g.2084712C>T - - TSC2_002451 - unpublished - - De novo - - +DdeI, -BsaJI - - DNA SEQ Blood - TSC - unpublished 1 affected in 1 generation; parents tested and variant not found ? - - - - - - - 1 Rosemary Ekong
+/. 34 c.4490C>T r.(?) p.(Pro1497Leu) - - Unknown - pathogenic g.2134713C>T g.2084712C>T p.P1497L - TSC2_002451 variant in angiofibroma (1.3% MAF) + normal skin (0.61% MAF); seen with TSC2 c.976-15G>A (8.9% MAF in AF + 0.63% MAF in normal skin) and TSC2 nonsense c.1372C>T (7.3% MAF in AF); freq in blood & saliva similar to normal controls; NGS read depth >500x PubMed: Tyburczy, 2015; PubMed: Giannikou, 2019 - - De novo - - +DdeI, -BsaJI - - DNA SEQ-NG-I Angiofibroma, normal skin amplicon NGS TSC P14 PubMed: Tyburczy, 2015; PubMed: Giannikou, 2019 23 year old TSC patient with NMI status (previous Sanger SEQ and TSC2 MLPA negative); no FH of TS; has TSC2 splice variant c.976-15G>A, TSC2 nonsense c.1372C>T and TSC2 missense c.4490C>T in facial angiofibroma; both parents tested and variants not found M - - - - - - - 1 Rosemary Ekong
+/. 34 c.4490C>T r.(?) p.(Pro1497Leu) - - Paternal (confirmed) - pathogenic g.2134713C>T g.2084712C>T - - TSC2_002451 found with TSC2 silent variants c.576C>T and c.4215C>T; TSC2 c.3131+9G>T and TSC2 c.3285-27A>C; pathogenicity of TSC2 c.4490C>T reported as predicted from protein modeling PubMed: Sudarshan 2019 - - Germline - - - - - DNA SEQ Blood - TSC TS-7 PubMed: Sudarshan 2019 1 yr old TS affected child with TSC2 missense c.4490C>T (inherited from affected parent); TSC2 silent variants c.576C>T and c.4215C>T; TSC2 c.3131+9G>T and TSC2 c.3285-27A>C (inheritance not indicated); index has abnormal EEG and normal renal USS; affected parent has facial angiofibromas; renal AML; cortical tubers, SEN, SEGAs (Chowdhury, personal communication) M - - - - - - - 1 Rosemary Ekong
+/+ 34 c.4490C>T r.(?) p.(Pro1497Leu) - - Unknown - pathogenic (dominant) g.2134713C>T g.2084712C>T - - TSC2_002451 - - - - SUMMARY record - - DdeI+, BsaJI- - - - - - - - - - - - - - - - - - - - -
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Assessment of functional consequences - Our conclusions on the functional consequences of variants are based on the type of variant, results of in vitro functional tests (doi: 10.1002/humu.21451; doi: 10.1002/humu.22202; doi: 10.1002/humu.23963), population frequencies, output from in silico splice site prediction algorithms, and any clinical/family data available to us. We also have output from protein prediction programs in this database for comparison purposes and they are not considered in our assessment of pathogenicity. PolyPhen Predictions - Note that these results are from PolyPhen-2 and only the HumDiv classification is shown.


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