9-71870173-G-C

Position:

• chr9-71870173-G-C

Variant summary

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

The NM_001025780.3(ABHD17B):​c.557C>G​(p.Ala186Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,756 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ABHD17B NM_001025780.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.86

Genes affected

ABHD17B (HGNC:24278): (abhydrolase domain containing 17B, depalmitoylase) Enables palmitoyl-(protein) hydrolase activity. Involved in protein depalmitoylation. Located in membrane. [provided by Alliance of Genome Resources, Apr 2022]

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=0.40237427).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ABHD17B	NM_001025780.3	c.557C>G	p.Ala186Gly	missense_variant	3/4	ENST00000333421.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ABHD17B	ENST00000333421.7	c.557C>G	p.Ala186Gly	missense_variant	3/4	1	NM_001025780.3	P1
ABHD17B	ENST00000377041.6	c.557C>G	p.Ala186Gly	missense_variant	3/5	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461756 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727176

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

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

May 31, 2023

The c.557C>G (p.A186G) alteration is located in exon 3 (coding exon 2) of the ABHD17B gene. This alteration results from a C to G substitution at nucleotide position 557, causing the alanine (A) at amino acid position 186 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	Benign	0.16
BayesDel_addAF	Uncertain	0.069	T
BayesDel_noAF	Benign	-0.14
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.063	.;T
Eigen	Benign	0.11
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.97	D;D
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.40	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.48	N;N
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.7	N;N
REVEL	Benign	0.23
Sift	Benign	0.43	T;T
Sift4G	Benign	0.49	T;T
Polyphen		0.14	B;B
Vest4		0.65
MutPred		0.48		Loss of sheet (P = 0.0457);Loss of sheet (P = 0.0457);
MVP		0.44
MPC		0.83
ClinPred		0.75	D
GERP RS		5.3
Varity_R		0.29
gMVP		0.78

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr9-74485089;