7-77377400-CAAAAAAAAAAAAA-CAA

Variant names:

• chr7-77377400-CAAAAAAAAAAA-C
• NM_017439.4:c.577-21_577-11delTTTTTTTTTTT

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_017439.4(GSAP):​c.577-21_577-11delTTTTTTTTTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000828 in 1,086,454 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 0)
  • Exomes 𝑓: 0.0000083 (0 hom.)
• Consequence: GSAP NM_017439.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.21

Genes affected

GSAP (HGNC:28042): (gamma-secretase activating protein) Accumulation of neurotoxic amyloid-beta is a major hallmark of Alzheimer disease (AD; MIM 104300). Formation of amyloid-beta is catalyzed by gamma-secretase (see PSEN1; MIM 104311), a protease with numerous substrates. PION, or GSAP, selectively increases amyloid-beta production through a mechanism involving its interaction with both gamma-secretase and its substrate, the amyloid-beta precursor protein (APP; MIM 104760) C-terminal fragment (APP-CTF) (He et al., 2010 [PubMed 20811458]).[supplied by OMIM, Nov 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GSAP	NM_017439.4	c.577-21_577-11delTTTTTTTTTTT		intron_variant	Intron 8 of 30	ENST00000257626.12	NP_059135.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GSAP	ENST00000257626.12	c.577-21_577-11delTTTTTTTTTTT		intron_variant	Intron 8 of 30	1	NM_017439.4	ENSP00000257626.7
GSAP	ENST00000334003.11	n.468-21_468-11delTTTTTTTTTTT		intron_variant	Intron 7 of 18	2

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD4 exome AF: 0.00000828 AC: 9 AN: 1086454 Hom.: 0 AF XY: 0.00000748 AC XY: 4 AN XY: 534560

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000416

Gnomad4 SAS exome AF: 0.0000953

Gnomad4 FIN exome AF: 0.0000827

Gnomad4 NFE exome AF: 0.00000113

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Splicing

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: chr7-77006717;