rs78977446

Positions:

• chr9-133445796-C-G
• chr9-133445796-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_139027.6(ADAMTS13):​c.2708C>G​(p.Ser903Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000695 in 1,438,090 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S903L) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: ADAMTS13 NM_139027.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.625

Genes affected

ADAMTS13 (HGNC:1366): (ADAM metallopeptidase with thrombospondin type 1 motif 13) This gene encodes a member of a family of proteins containing several distinct regions, including a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. The enzyme encoded by this gene specifically cleaves von Willebrand Factor (vWF). Defects in this gene are associated with thrombotic thrombocytopenic purpura. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.38635775).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ADAMTS13	NM_139027.6	c.2708C>G	p.Ser903Trp	missense_variant	21/29	ENST00000355699.7	NP_620596.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ADAMTS13	ENST00000355699.7	c.2708C>G	p.Ser903Trp	missense_variant	21/29	1	NM_139027.6	ENSP00000347927	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.95e-7 AC: 1 AN: 1438090 Hom.: 0 Cov.: 32 AF XY: 0.00000141 AC XY: 1 AN XY: 710676

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.14e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	14
DANN	Benign	0.96
DEOGEN2	Benign	0.36	T;.;.
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.89
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.53	T;T;T
M_CAP	Benign	0.066	D
MetaRNN	Benign	0.39	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.69	N;N;.
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-2.0	N;N;N
REVEL	Benign	0.14
Sift	Uncertain	0.0090	D;D;D
Sift4G	Uncertain	0.011	D;D;.
Polyphen		0.81	P;P;P
Vest4		0.30
MutPred		0.58		Gain of MoRF binding (P = 0.056);Gain of MoRF binding (P = 0.056);.;
MVP		0.74
MPC		0.53
ClinPred		0.15	T
GERP RS		0.16
Varity_R		0.084
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs78977446; hg19: chr9-136310917;