chr2-219250485-A-C

Variant names:

• chr2-219250485-A-C
• rs773161555
• NM_006000.3:c.1214T>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PP2 PP3 BS2

The NM_006000.3(TUBA4A):​c.1214T>G​(p.Val405Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000821 in 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000082 (0 hom.)
• Consequence: TUBA4A NM_006000.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.29
• Publications: 1 publications found

Genes affected

TUBA4A (HGNC:12407): (tubulin alpha 4a) Microtubules of the eukaryotic cytoskeleton perform essential and diverse functions and are composed of a heterodimer of alpha and beta tubulin. The genes encoding these microtubule constituents are part of the tubulin superfamily, which is composed of six distinct families. Genes from the alpha, beta and gamma tubulin families are found in all eukaryotes. The alpha and beta tubulins represent the major components of microtubules, while gamma tubulin plays a critical role in the nucleation of microtubule assembly. There are multiple alpha and beta tubulin genes and they are highly conserved among and between species. This gene encodes an alpha tubulin that is a highly conserved homolog of a rat testis-specific alpha tubulin. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2013]

STK16 (HGNC:11394): (serine/threonine kinase 16) Predicted to enable protein serine/threonine kinase activity. Involved in protein autophosphorylation. Located in cytosol; nucleoplasm; and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 6 curated pathogenic missense variants (we use a threshold of 10). The gene has 1 curated benign missense variants. Gene score misZ: 3.3027 (above the threshold of 3.09). Trascript score misZ: 4.9936 (above the threshold of 3.09). GenCC associations: The gene is linked to autosomal dominant macrothrombocytopenia, amyotrophic lateral sclerosis type 22.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.8
• BS2: High AC in GnomAdExome4 at 12 AD,Unknown gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006000.3. 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
	TUBA4A	NM_006000.3	MANE Select	c.1214T>G	p.Val405Gly	missense	Exon 4 of 4	NP_005991.1	P68366-1
	TUBA4A	NM_001278552.2		c.1169T>G	p.Val390Gly	missense	Exon 4 of 4	NP_001265481.1	P68366-2
	STK16	NM_001330213.2	MANE Select	c.*1926A>C		downstream_gene	N/A	NP_001317142.1	O75716

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TUBA4A	ENST00000248437.9	TSL:1 MANE Select	c.1214T>G	p.Val405Gly	missense	Exon 4 of 4	ENSP00000248437.4	P68366-1
	TUBA4A	ENST00000875456.1		c.1220T>G	p.Val407Gly	missense	Exon 4 of 4	ENSP00000545515.1
	TUBA4A	ENST00000392088.6	TSL:2	c.1169T>G	p.Val390Gly	missense	Exon 4 of 4	ENSP00000375938.2	P68366-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000278 AC: 7 AN: 251488 AF XY: 0.0000368

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000615

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000821 AC: 12 AN: 1461880 Hom.: 0 Cov.: 31 AF XY: 0.0000110 AC XY: 8 AN XY: 727236

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000899 AC: 10 AN: 1111998

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000329 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.0000576 AC: 7

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Amyotrophic lateral sclerosis (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.44
CADD	Pathogenic	27
DANN	Benign	0.96
DEOGEN2	Uncertain	0.67	D
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.87	D
M_CAP	Pathogenic	0.72	D
MetaRNN	Pathogenic	0.80	D
MetaSVM	Uncertain	0.68	D
MutationAssessor	Pathogenic	4.2	H
PhyloP100		9.3
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-5.1	D
REVEL	Pathogenic	0.89
Sift4G	Pathogenic	0.0	D
Polyphen		0.034	B
Vest4		0.64
MutPred		0.74		Loss of stability (P = 0.0179)
MVP		0.92
MPC		2.3
ClinPred		0.97	D
GERP RS		5.1
Varity_R		0.92
gMVP		0.97
Mutation Taster		=37/63	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs773161555; hg19: chr2-220115207;