Variant 7-92222869-TGAGA-TGA details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_194454.3(KRIT1):c.1362_1363delTC(p.Gln455fs) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,457,718 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

KRIT1
NM_194454.3 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 7.91

Variant links:

Genes affected

KRIT1 (HGNC:1573): (KRIT1 ankyrin repeat containing) This gene encodes a protein containing four ankyrin repeats, a band 4.1/ezrin/radixin/moesin (FERM) domain, and multiple NPXY sequences. The encoded protein is localized in the nucleus and cytoplasm. It binds to integrin cytoplasmic domain-associated protein-1 alpha (ICAP1alpha), and plays a critical role in beta1-integrin-mediated cell proliferation. It associates with junction proteins and RAS-related protein 1A (Rap1A), which requires the encoded protein for maintaining the integrity of endothelial junctions. It is also a microtubule-associated protein and may play a role in microtubule targeting. Mutations in this gene result in cerebral cavernous malformations. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Sep 2009]

KRIT1 links:

ENSG00000289027 (HGNC:):

ENSG00000289027 links:

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ACMG classification

Classification made for transcript

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 7-92222869-TGA-T is Pathogenic according to our data. Variant chr7-92222869-TGA-T is described in ClinVar as [Pathogenic]. Clinvar id is 468207.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr7-92222869-TGA-T is described in Lovd as [Pathogenic]. Variant chr7-92222869-TGA-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRIT1	NM_194454.3 linkuse as main transcript	c.1362_1363delTC	p.Gln455fs	frameshift_variant	13/19	ENST00000394505.7	NP_919436.1	O00522-1A4D1F7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
KRIT1	ENST00000394505.7 linkuse as main transcript	c.1362_1363delTC	p.Gln455fs	frameshift_variant	13/19	1	NM_194454.3	ENSP00000378013.2	O00522-1
ENSG00000289027	ENST00000692281.1 linkuse as main transcript	c.1362_1363delTC	p.Gln455fs	frameshift_variant	13/26			ENSP00000510568.1	A0A8I5KWQ7
ENSG00000285953	ENST00000458493.6 linkuse as main transcript	c.1362_1363delTC	p.Gln455fs	frameshift_variant	12/20	4		ENSP00000396352.2	C9JD81

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1457718

Hom.:

AF XY:

0.00000138

AC XY:

AN XY:

725514

show subpopulations

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:

9.02e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Jun 20, 2016	- -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2024	KRIT1: PVS1, PM2, PP1:Moderate, PS4:Moderate -

Cerebral cavernous malformation 1

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Apr 01, 2001

- -

Cerebral cavernous malformation

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 11, 2024

This sequence change creates a premature translational stop signal (p.Gln455Argfs*24) in the KRIT1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in KRIT1 are known to be pathogenic (PMID: 10508515, 11222804, 12404106, 24689081). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individuals with cerebral cavernous malformations (PMID: 23595507, 24466005, 27766163). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 468207). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

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