rs768176054

chr14-67793710-CA-C

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_015346.4(ZFYVE26):c.2450del(p.Leu817CysfsTer12) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000031 in 1,613,772 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. L817L) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000033 (0 hom.)
• Consequence: ZFYVE26 NM_015346.4 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 1.12

Genes affected

ZFYVE26 (HGNC:20761): (zinc finger FYVE-type containing 26) This gene encodes a protein which contains a FYVE zinc finger binding domain. The presence of this domain is thought to target these proteins to membrane lipids through interaction with phospholipids in the membrane. Mutations in this gene are associated with autosomal recessive spastic paraplegia-15. [provided by RefSeq, Oct 2008]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 14-67793710-CA-C is Pathogenic according to our data. Variant chr14-67793710-CA-C is described in ClinVar as [Pathogenic]. Clinvar id is 430412.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ZFYVE26	NM_015346.4	c.2450del	p.Leu817CysfsTer12	frameshift_variant	14/42	ENST00000347230.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ZFYVE26	ENST00000347230.9	c.2450del	p.Leu817CysfsTer12	frameshift_variant	14/42	1	NM_015346.4	P1

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 152030 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251146 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135754

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000328 AC: 48 AN: 1461742 Hom.: 0 Cov.: 31 AF XY: 0.0000330 AC XY: 24 AN XY: 727176

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000414

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 152030 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74248

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Spastic paraplegia Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Dec 26, 2023

This sequence change creates a premature translational stop signal (p.Leu817Cysfs*12) in the ZFYVE26 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ZFYVE26 are known to be pathogenic (PMID: 18394578, 19805727). This variant is present in population databases (rs768176054, gnomAD 0.002%). This premature translational stop signal has been observed in individual(s) with a ZFYVE26-related condition (PMID: 25497598). ClinVar contains an entry for this variant (Variation ID: 430412). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

May 24, 2017

The c.2450delT variant in the ZFYVE26 gene has been previously reported in the heterozygous state in the presence of a second ZFYVE26 variant in an individual with cerebellar ataxia, axonal sensorimotor neuropathy, and generalized atrophy on brain MRI (Pyle et al., 2015). The c.2450delT variant causes a frameshift starting with codon Leucine 817, changes this amino acid to a Cysteine residue, and creates a premature Stop codon at position 12 of the new reading frame, denoted p.Leu817CysfsX12. This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The c.2450delT variant is not observed in the homozygous state, or at a significant frequency, in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). We interpret c.2450delT as a pathogenic variant. -

Hereditary spastic paraplegia 15 Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Counsyl

Dec 15, 2016

- -

Computational scores

Source: dbNSFP v4.3

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: rs768176054; hg19: chr14-68260427;