16-77367648-A-T

Position:

• chr16-77367648-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_199355.4(ADAMTS18):​c.571T>A​(p.Tyr191Asn) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. Y191H) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ADAMTS18 NM_199355.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.16

Genes affected

ADAMTS18 (HGNC:17110): (ADAM metallopeptidase with thrombospondin type 1 motif 18) This gene encodes a member of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) protein family. ADAMTS family members share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. Individual members of this family differ in the number of C-terminal TS motifs, and some have unique C-terminal domains. The encoded preproprotein is proteolytically processed to generate the mature protein, which may regulate hemostatic balance and function as a tumor suppressor. Mutations in this gene may be associated with microcornea, myopic chorioretinal atrophy, and telecanthus (MMCAT) and cone-rod dystrophy in human patients. [provided by RefSeq, May 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.847

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ADAMTS18	NM_199355.4	c.571T>A	p.Tyr191Asn	missense_variant	4/23	ENST00000282849.10	NP_955387.1
ADAMTS18	NM_001326358.2	c.51T>A	p.Thr17=	synonymous_variant	4/23		NP_001313287.1
ADAMTS18	XM_047433672.1	c.51T>A	p.Thr17=	synonymous_variant	1/19		XP_047289628.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ADAMTS18	ENST00000282849.10	c.571T>A	p.Tyr191Asn	missense_variant	4/23	1	NM_199355.4	ENSP00000282849	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 46

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.070
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.076	T
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.37
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.020	T
MetaRNN	Pathogenic	0.85	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.8	L
MutationTaster	Benign	0.0000025	P
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-3.0	D
REVEL	Uncertain	0.36
Sift	Benign	0.21	T
Sift4G	Benign	0.076	T
Polyphen		0.60	P
Vest4		0.88
MutPred		0.40		Loss of phosphorylation at Y191 (P = 0.0101);
MVP		0.38
ClinPred		0.98	D
GERP RS		4.7
Varity_R		0.46
gMVP		0.57

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: rs11643211; hg19: chr16-77401545;