chr17-2613581-G-A

Position:

• chr17-2613581-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_000430.4(PAFAH1B1):​c.-191+19575G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000525 in 281,802 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 Benign (★).

• Frequency:
  • Genomes: 𝑓 0.00056 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00048 (0 hom.)
• Consequence: PAFAH1B1 NM_000430.4 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.697

Genes affected

PAFAH1B1 (HGNC:8574): (platelet activating factor acetylhydrolase 1b regulatory subunit 1) This locus was identified as encoding a gene that when mutated or lost caused the lissencephaly associated with Miller-Dieker lissencephaly syndrome. This gene encodes the non-catalytic alpha subunit of the intracellular Ib isoform of platelet-activating factor acteylhydrolase, a heterotrimeric enzyme that specifically catalyzes the removal of the acetyl group at the SN-2 position of platelet-activating factor (identified as 1-O-alkyl-2-acetyl-sn-glyceryl-3-phosphorylcholine). Two other isoforms of intracellular platelet-activating factor acetylhydrolase exist: one composed of multiple subunits, the other, a single subunit. In addition, a single-subunit isoform of this enzyme is found in serum. [provided by RefSeq, Apr 2009]

SAMD11P1 (HGNC:44473): (sterile alpha motif domain containing 11 pseudogene 1)

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.67).
• BP6: Variant 17-2613581-G-A is Benign according to our data. Variant chr17-2613581-G-A is described in ClinVar as [Benign]. Clinvar id is 2647220.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000565 (86/152298) while in subpopulation SAS AF= 0.0029 (14/4832). AF 95% confidence interval is 0.00175. There are 0 homozygotes in gnomad4. There are 32 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 86 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PAFAH1B1	NM_000430.4	c.-191+19575G>A		intron_variant		ENST00000397195.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PAFAH1B1	ENST00000397195.10	c.-191+19575G>A		intron_variant		1	NM_000430.4	P1
SAMD11P1	ENST00000571429.2	n.364C>T		non_coding_transcript_exon_variant	1/1

Frequencies

GnomAD3 genomes AF: 0.000565 AC: 86 AN: 152180 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000145

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000393

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00289

Gnomad FIN AF: 0.000283

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000823

Gnomad OTH AF: 0.000478

GnomAD4 exome AF: 0.000479 AC: 62 AN: 129504 Hom.: 0 Cov.: 0 AF XY: 0.000558 AC XY: 38 AN XY: 68134

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: 0.00455

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000514

Gnomad4 OTH exome AF: 0.000553

GnomAD4 genome AF: 0.000565 AC: 86 AN: 152298 Hom.: 0 Cov.: 32 AF XY: 0.000430 AC XY: 32 AN XY: 74472

Gnomad4 AFR AF: 0.000144

Gnomad4 AMR AF: 0.000392

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00290

Gnomad4 FIN AF: 0.000283

Gnomad4 NFE AF: 0.000824

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000635 Hom.: 0

Bravo AF: 0.000412

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

May 01, 2022

PAFAH1B1: BS1, BS2 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.67
CADD	Benign	9.3
DANN	Benign	0.48

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: rs554857059; hg19: chr17-2516875;