Our verdict is Benign. Variant got -17 ACMG points: 3P and 20B. PM1PP2BP4_StrongBP6_Very_StrongBS1BS2
The ENST00000324501.10(PSEN1):āc.953A>Gā(p.Glu318Gly) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0178 in 1,607,260 control chromosomes in the GnomAD database, including 345 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (ā ā ).
PSEN1 (HGNC:9508): (presenilin 1) Alzheimer's disease (AD) patients with an inherited form of the disease carry mutations in the presenilin proteins (PSEN1; PSEN2) or in the amyloid precursor protein (APP). These disease-linked mutations result in increased production of the longer form of amyloid-beta (main component of amyloid deposits found in AD brains). Presenilins are postulated to regulate APP processing through their effects on gamma-secretase, an enzyme that cleaves APP. Also, it is thought that the presenilins are involved in the cleavage of the Notch receptor, such that they either directly regulate gamma-secretase activity or themselves are protease enzymes. Several alternatively spliced transcript variants encoding different isoforms have been identified for this gene, the full-length nature of only some have been determined. [provided by RefSeq, Aug 2008]
In a chain Presenilin-1 CTF subunit (size 168) in uniprot entity PSN1_HUMAN there are 66 pathogenic changes around while only 7 benign (90%) in ENST00000324501.10
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PSEN1. . Gene score misZ 2.1558 (greater than the threshold 3.09). Trascript score misZ 3.0986 (greater than threshold 3.09). GenCC has associacion of gene with acne inversa, familial, 3, dilated cardiomyopathy, Alzheimer disease 3, early-onset autosomal dominant Alzheimer disease, semantic dementia, Pick disease, familial isolated dilated cardiomyopathy, dilated cardiomyopathy 1U, behavioral variant of frontotemporal dementia.
BP4
Computational evidence support a benign effect (MetaRNN=0.0052029192).
BP6
Variant 14-73206470-A-G is Benign according to our data. Variant chr14-73206470-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 98094.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-73206470-A-G is described in Lovd as [Benign]. Variant chr14-73206470-A-G is described in Lovd as [Likely_benign].
BS1
Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0146 (2220/152350) while in subpopulation NFE AF= 0.0211 (1433/68030). AF 95% confidence interval is 0.0202. There are 27 homozygotes in gnomad4. There are 1065 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Dilated cardiomyopathy 1U Benign:1
Likely benign, criteria provided, single submitter
clinical testing
Illumina Laboratory Services, Illumina
Mar 06, 2018
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -
Alzheimer disease Benign:1
Benign, criteria provided, single submitter
research
Biesecker Lab/Clinical Genomics Section, National Institutes of Health