X-48684344-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_000377.3(WAS):c.194C>G(p.Thr65Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000182 in 1,098,188 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as not provided (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T65N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 22)
  • Exomes 𝑓: 0.0000018 (0 hom. 1 hem.)
• Consequence: WAS NM_000377.3 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 0.621

Genes affected

WAS (HGNC:12731): (WASP actin nucleation promoting factor) The Wiskott-Aldrich syndrome (WAS) family of proteins share similar domain structure, and are involved in transduction of signals from receptors on the cell surface to the actin cytoskeleton. The presence of a number of different motifs suggests that they are regulated by a number of different stimuli, and interact with multiple proteins. Recent studies have demonstrated that these proteins, directly or indirectly, associate with the small GTPase, Cdc42, known to regulate formation of actin filaments, and the cytoskeletal organizing complex, Arp2/3. Wiskott-Aldrich syndrome is a rare, inherited, X-linked, recessive disease characterized by immune dysregulation and microthrombocytopenia, and is caused by mutations in the WAS gene. The WAS gene product is a cytoplasmic protein, expressed exclusively in hematopoietic cells, which show signalling and cytoskeletal abnormalities in WAS patients. A transcript variant arising as a result of alternative promoter usage, and containing a different 5' UTR sequence, has been described, however, its full-length nature is not known. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a domain WH1 (size 109) in uniprot entity WASP_HUMAN there are 41 pathogenic changes around while only 5 benign (89%) in NM_000377.3
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3168683).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WAS	NM_000377.3	c.194C>G	p.Thr65Ser	missense_variant	2/12	ENST00000376701.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WAS	ENST00000376701.5	c.194C>G	p.Thr65Ser	missense_variant	2/12	1	NM_000377.3	P2

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome AF: 0.00000182 AC: 2 AN: 1098188 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 1 AN XY: 363542

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000369

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 22

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

not specified Other:1

not provided, no classification provided

reference population

ITMI

Sep 19, 2013

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Uncertain	0.026	T
BayesDel_noAF	Benign	-0.20
Cadd	Benign	18
Dann	Benign	0.44
DEOGEN2	Benign	0.29	T;D
FATHMM_MKL	Benign	0.45	N
LIST_S2	Benign	0.46	T;T
M_CAP	Pathogenic	0.55	D
MetaRNN	Benign	0.32	T;T
MetaSVM	Uncertain	0.39	D
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-0.25	N;N
REVEL	Uncertain	0.45
Sift	Benign	1.0	T;T
Sift4G	Benign	0.88	T;T
Polyphen		0.083	.;B
Vest4		0.16
MutPred		0.51		Gain of disorder (P = 0.0342);Gain of disorder (P = 0.0342);
MVP		0.78
MPC		0.55
ClinPred		0.11	T
GERP RS		2.8
Varity_R		0.10
gMVP		0.60

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

Publications

LitVar

Other links and lift over

dbSNP: rs797044478; hg19: chrX-48542733;