19-1880063-T-C

Position:

• chr19-1880063-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The ENST00000590661.1(ABHD17A):​c.333-2A>G variant causes a splice acceptor, intron change. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABHD17A ENST00000590661.1 splice_acceptor, intron
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.00

Genes affected

ABHD17A (HGNC:28756): (abhydrolase domain containing 17A, depalmitoylase) Enables palmitoyl-(protein) hydrolase activity. Involved in protein depalmitoylation and protein localization to membrane. Located in endosome membrane; nuclear speck; and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ABHD17A (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.20648968 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABHD17A	NM_001130111.2	c.385A>G	p.Ser129Gly	missense_variant	3/5	ENST00000292577.12	NP_001123583.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABHD17A	ENST00000292577.12	c.385A>G	p.Ser129Gly	missense_variant	3/5	1	NM_001130111.2	ENSP00000292577.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 18, 2023

The c.538A>G (p.S180G) alteration is located in exon 4 (coding exon 3) of the ABHD17A gene. This alteration results from a A to G substitution at nucleotide position 538, causing the serine (S) at amino acid position 180 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Uncertain	0.064	T
BayesDel_noAF	Benign	-0.21
CADD	Pathogenic	26
DANN	Uncertain	1.0
Eigen	Benign	-0.015
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.94	D
M_CAP	Benign	0.034	D
ClinPred		0.91	D
GERP RS		4.4

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: rs2012480102; hg19: chr19-1880062;