rs1326827713

Variant names:

• chr7-92234458-T-TAATG
• rs1326827713
• NM_194454.3:c.976_979dupCATT

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_194454.3(KRIT1):​c.976_979dupCATT​(p.Tyr327SerfsTer10) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRIT1 NM_194454.3 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 8.95
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• cerebral cavernous malformation 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• famililal cerebral cavernous malformations

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000289027 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 12 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 7-92234458-T-TAATG is Pathogenic according to our data. Variant chr7-92234458-T-TAATG is described in ClinVar as Pathogenic. ClinVar VariationId is 536121.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_194454.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRIT1	NM_194454.3	MANE Select	c.976_979dupCATT	p.Tyr327SerfsTer10	frameshift	Exon 10 of 19	NP_919436.1
	KRIT1	NM_001350672.1		c.976_979dupCATT	p.Tyr327SerfsTer10	frameshift	Exon 8 of 17	NP_001337601.1
	KRIT1	NM_001350673.1		c.976_979dupCATT	p.Tyr327SerfsTer10	frameshift	Exon 9 of 18	NP_001337602.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRIT1	ENST00000394505.7	TSL:1 MANE Select	c.976_979dupCATT	p.Tyr327SerfsTer10	frameshift	Exon 10 of 19	ENSP00000378013.2
	ENSG00000289027	ENST00000692281.1		c.976_979dupCATT	p.Tyr327SerfsTer10	frameshift	Exon 10 of 26	ENSP00000510568.1
	ENSG00000285953	ENST00000458493.6	TSL:4	c.976_979dupCATT	p.Tyr327SerfsTer10	frameshift	Exon 9 of 20	ENSP00000396352.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Cerebral cavernous malformation (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		8.9
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs1326827713; hg19: chr7-91863772;