rs121908477

chr9-133428750-G-Achr9-133428750-G-Cchr9-133428750-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 6P and 2B. PM1 PM2 PM5 BP4_Moderate

The NM_139027.6(ADAMTS13):c.803G>A(p.Arg268Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000333 in 1,202,134 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 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. R268P) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 29)
  • Exomes 𝑓: 0.0000033 (0 hom.)
• Consequence: ADAMTS13 NM_139027.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.90

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 4 ACMG points.

• PM1: In a disulfide_bond (size 79) in uniprot entity ATS13_HUMAN there are 11 pathogenic changes around while only 1 benign (92%) in NM_139027.6
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr9-133428750-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 5812.Status of the report is no_assertion_criteria_provided, 0 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.104420155).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ADAMTS13	NM_139027.6	c.803G>A	p.Arg268Gln	missense_variant	7/29	ENST00000355699.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ADAMTS13	ENST00000355699.7	c.803G>A	p.Arg268Gln	missense_variant	7/29	1	NM_139027.6	A2

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome AF: 0.00000333 AC: 4 AN: 1202134 Hom.: 0 Cov.: 33 AF XY: 0.00000510 AC XY: 3 AN XY: 588504

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: 0.00000407

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 29

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
Cadd	Benign	17
Dann	Benign	0.97
DEOGEN2	Benign	0.041	T;T;.;.;.
Eigen	Benign	-0.97
Eigen_PC	Benign	-0.81
FATHMM_MKL	Benign	0.28	N
LIST_S2	Benign	0.75	T;T;T;T;T
M_CAP	Pathogenic	0.37	D
MetaRNN	Benign	0.10	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.34	N;.;.;N;N
MutationTaster	Benign	1.0	D;D;N;N;N;N
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-0.45	N;.;N;N;N
REVEL	Benign	0.053
Sift	Benign	0.46	T;.;T;T;T
Sift4G	Benign	0.79	T;T;T;T;.
Polyphen		0.0040	B;.;.;B;B
Vest4		0.093
MutPred		0.49		Loss of MoRF binding (P = 0.0256);.;Loss of MoRF binding (P = 0.0256);Loss of MoRF binding (P = 0.0256);Loss of MoRF binding (P = 0.0256);
MVP		0.61
MPC		0.40
ClinPred		0.083	T
GERP RS		1.0
Varity_R		0.12
gMVP		0.19

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: rs121908477; hg19: chr9-136293870;