rs587784280
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM2PP3PP5_Very_Strong
The NM_000430.4(PAFAH1B1):c.671+5G>A variant causes a splice donor 5th base, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).
Frequency
Genomes: not found (cov: 32)
Consequence
PAFAH1B1
NM_000430.4 splice_donor_5th_base, intron
NM_000430.4 splice_donor_5th_base, intron
Scores
1
1
Splicing: ADA: 0.9964
2
Clinical Significance
Conservation
PhyloP100: 9.60
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]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 11 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
PP5
?
Variant 17-2672762-G-A is Pathogenic according to our data. Variant chr17-2672762-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 159537.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
PAFAH1B1 | NM_000430.4 | c.671+5G>A | splice_donor_5th_base_variant, intron_variant | ENST00000397195.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
PAFAH1B1 | ENST00000397195.10 | c.671+5G>A | splice_donor_5th_base_variant, intron_variant | 1 | NM_000430.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 24
GnomAD4 exome
Cov.:
24
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Likely pathogenic
Submissions summary: Pathogenic:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Lissencephaly due to LIS1 mutation Pathogenic:2
Likely pathogenic, criteria provided, single submitter | research | Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard | - | The heterozygous c.671+5G>A variant was identified by our study in one individual with Lissencephaly. Trio analysis showed this variant to be de novo. This variant is located in the extended slice site According to alamut it eliminates a splice donor site 5 nucleotides from the canonical splice site, and weakens the splice donor site of intron 7 by 2/5 splice predictors. ESEfinder predicts the splice donor site to be unaffected but the donor site 5 nucleotides away is eliminated. This variant was absent from large population studies but it was entered in ClinVar by UChicago as likely pathogenic. They reported that they identified this variant in one individual with Lissencephaly. In summary, although additional studies are required to fully establish its clinical significance, this variant is likely pathogenic. - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | Feb 08, 2013 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
CADD
Benign
DANN
Uncertain
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DL_spliceai
Position offset: -5
Find out detailed SpliceAI scores and Pangolin per-transcript scores at