ClinVar Miner

Submissions for variant NM_178012.5(TUBB2B):c.871C>A (p.Gln291Lys)

dbSNP: rs1554126886
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Genetic Services Laboratory, University of Chicago RCV000503116 SCV000597726 likely pathogenic Complex cortical dysplasia with other brain malformations 7 2015-11-19 criteria provided, single submitter clinical testing
Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard RCV000503116 SCV005045249 likely pathogenic Complex cortical dysplasia with other brain malformations 7 2024-05-22 criteria provided, single submitter curation The heterozygous p.Gln291Lys variant in TUBB2B was identified by our study in one individual with cortical dysplasia, complex, with other brain malformations 7. Trio exome analysis showed this variant to be de novo. This variant was found to be de novo in 1 individual with confirmed paternity and maternity (PMID: 29671837), but was absent from large population studies. This variant has been reported in ClinVar (Variation ID: 437125) and has been interpreted as likely pathogenic by University of Chicago Genetic Services Laboratory and University of Washington Center for Mendelian Genomics. Computational prediction tools and conservation analyses suggest that this variant may impact the protein, though this information is not predictive enough to determine pathogenicity. The number of missense variants reported in TUBB2B in the general population is lower than expected, suggesting there is little benign variation in this gene and slightly increasing the possibility that a missense variant in this gene may not be tolerated. In summary, although additional studies are required to fully establish its clinical significance, this variant is likely pathogenic for autosomal dominant cortical dysplasia, complex, with other brain malformations 7. ACMG/AMP Criteria applied: PS2, PM2_Supporting, PP3, PP2 (Richards 2015).
University of Washington Center for Mendelian Genomics, University of Washington RCV001291305 SCV001479777 likely pathogenic Lissencephaly no assertion criteria provided research

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