TUBB2A p.Ser188Ser

Variant names:

• chr6-3154636-C-C
• NM_001069.3:c.

Your query was ambiguous. Multiple possible variants found:

• chr6-3154637--
• chr6-3154637-A-G
• chr6-3154637-A-T
• chr6-3154637-A-C
• chr6-3154638-GA-CT
• chr6-3154637-AGA-GCT

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001069.3(TUBB2A):​c. variant causes a exon region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 28)
• Consequence: TUBB2A NM_001069.3 exon_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.57
• Publications: 0 publications found

Genes affected

TUBB2A (HGNC:12412): (tubulin beta 2A class IIa) Microtubules, key participants in processes such as mitosis and intracellular transport, are composed of heterodimers of alpha- and beta-tubulins. The protein encoded by this gene is a beta-tubulin. Defects in this gene are associated with complex cortical dysplasia with other brain malformations-5. Two transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2015]

TUBB2A Gene-Disease associations (from GenCC):

• complex cortical dysplasia with other brain malformations 5

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Illumina, Labcorp Genetics (formerly Invitae), G2P
• tubulinopathy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen

ENSG00000309609 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001069.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TUBB2A	NM_001069.3	MANE Select	c.		exon_region	Exon 4 of 4	NP_001060.1	Q13885
	TUBB2A	NM_001310315.2		c.		exon_region	Exon 4 of 4	NP_001297244.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TUBB2A	ENST00000333628.4	TSL:1 MANE Select	c.		exon_region	Exon 4 of 4	ENSP00000369703.2	Q13885
	TUBB2A	ENST00000940056.1		c.		exon_region	Exon 3 of 3	ENSP00000610115.1
	TUBB2A	ENST00000489942.1	TSL:2	n.		exon_region	Exon 4 of 4

Frequencies

GnomAD3 genomes Cov.: 28

GnomAD4 exome Cov.: 141

GnomAD4 genome Cov.: 28

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-1.6

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr6-3154870;