chr10-122458639-AG-A

Variant names:

• chr10-122458639-AG-A
• rs2133901631
• ENST00000648167.1:c.85delG

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The ENST00000648167.1(HTRA1):​c.85delG​(p.Ala29LeufsTer80) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: HTRA1 ENST00000648167.1 frameshift
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.64
• Publications: 0 publications found

Genes affected

HTRA1 (HGNC:9476): (HtrA serine peptidase 1) This gene encodes a member of the trypsin family of serine proteases. This protein is a secreted enzyme that is proposed to regulate the availability of insulin-like growth factors (IGFs) by cleaving IGF-binding proteins. It has also been suggested to be a regulator of cell growth. Variations in the promoter region of this gene are the cause of susceptibility to age-related macular degeneration type 7. [provided by RefSeq, Jul 2008]

HTRA1 Gene-Disease associations (from GenCC):

• CARASIL syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 2

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• genetic cerebral small vessel disease

  Inheritance: AD Classification: STRONG Submitted by: Franklin by Genoox
• HTRA1-related autosomal dominant cerebral small vessel disease

  Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet

ENSG00000285955 (HGNC:58122):

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 29 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HTRA1-AS1	XR_946382.3	n.1729delC		non_coding_transcript_exon_variant	Exon 2 of 3
HTRA1-AS1	XR_946383.3	n.1707delC		non_coding_transcript_exon_variant	Exon 2 of 4
HTRA1-AS1	XR_946384.3	n.1456delC		non_coding_transcript_exon_variant	Exon 3 of 4
HTRA1-AS1	XR_946385.3	n.1707delC		non_coding_transcript_exon_variant	Exon 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HTRA1	ENST00000648167.1	c.85delG	p.Ala29LeufsTer80	frameshift_variant	Exon 1 of 9			ENSP00000498033.1
ENSG00000285955	ENST00000647969.1	n.37delC		non_coding_transcript_exon_variant	Exon 1 of 2
ENSG00000285955	ENST00000650300.1	n.1707delC		non_coding_transcript_exon_variant	Exon 2 of 3

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Aug 01, 2021

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.6

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs2133901631; hg19: chr10-124218155;