Genetic Variant PAFAH1B1:c.-191+3792_-191+3793delGT (chr17-2597781-AGT-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BS1BS2

The NM_000430.4(PAFAH1B1):c.-191+3792_-191+3793delGT variant causes a intron change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00037 ( 0 hom., cov: 0)

Consequence

PAFAH1B1
NM_000430.4 intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.747

Publications

0 publications found

Variant links:

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]

PAFAH1B1 Gene-Disease associations (from GenCC):

lissencephaly due to LIS1 mutation
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P

PAFAH1B1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000371 (56/150938) while in subpopulation NFE AF = 0.000709 (48/67716). AF 95% confidence interval is 0.000549. There are 0 homozygotes in GnomAd4. There are 23 alleles in the male GnomAd4 subpopulation. Median coverage is 0. This position passed quality control check.

BS2

High AC in GnomAd4 at 56 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
PAFAH1B1	NM_000430.4 link	c.-191+3792_-191+3793delGT	intron_variant	Intron 1 of 10	ENST00000397195.10	NP_000421.1	P43034-1
PAFAH1B1	XM_011523901.3 link	c.-191+3792_-191+3793delGT	intron_variant	Intron 1 of 11		XP_011522203.1	A0A6Q8PFU3
PAFAH1B1	XM_011523902.4 link	c.-396+3404_-396+3405delGT	intron_variant	Intron 1 of 12		XP_011522204.1	A0A6Q8PFU3
PAFAH1B1	XM_017024701.2 link	c.-191+4468_-191+4469delGT	intron_variant	Intron 1 of 10		XP_016880190.1	P43034-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PAFAH1B1	ENST00000397195.10 link	c.-191+3776_-191+3777delGT		intron_variant	Intron 1 of 10	1	NM_000430.4	ENSP00000380378.4		P43034-1

Frequencies

GnomAD3 genomes

AF:

0.000371

AC:

AN:

150824

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000122

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000664

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000967

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000709

Gnomad OTH

AF:

0.000484

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

AF:

0.000371

AC:

AN:

150938

Hom.:

Cov.:

AF XY:

0.000312

AC XY:

AN XY:

73678

show subpopulations

African (AFR)

AF:

0.000122

AC:

AN:

41136

American (AMR)

AF:

0.0000663

AC:

AN:

15072

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3454

East Asian (EAS)

AF:

0.00

AC:

AN:

5140

South Asian (SAS)

AF:

0.00

AC:

AN:

4794

European-Finnish (FIN)

AF:

0.0000967

AC:

AN:

10340

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000709

AC:

AN:

67716

Other (OTH)

AF:

0.000479

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

208

Bravo

AF:

0.000366

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

-0.75

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

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chr17-2597781-AGT-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over