chr7-92199351-T-C

Position:

• chr7-92199351-T-C

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 0P and 18B. BP4_Moderate BP6_Very_Strong BA1

The NM_004912.4(KRIT1):​c.*1385A>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.1 in 152,262 control chromosomes in the GnomAD database, including 981 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.10 (981 hom., cov: 32)
  • Failed GnomAD Quality Control
• Consequence: KRIT1 NM_004912.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 0.544

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]

ACMG classification

Verdict is Benign. Variant got -18 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.45).
• BP6: Variant 7-92199351-T-C is Benign according to our data. Variant chr7-92199351-T-C is described in ClinVar as [Benign]. Clinvar id is 360865.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.14 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRIT1	NM_001013406.2	c.*1385A>G		3_prime_UTR_variant	17/17		NP_001013424.1
KRIT1	NM_001350669.1	c.*1385A>G		3_prime_UTR_variant	17/17		NP_001337598.1
KRIT1	NM_001350670.1	c.*1385A>G		3_prime_UTR_variant	18/18		NP_001337599.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRIT1	ENST00000394507.5	c.*1385A>G		3_prime_UTR_variant	20/20	5		ENSP00000378015	P1
KRIT1	ENST00000692807.1	c.*1385A>G		3_prime_UTR_variant	17/17			ENSP00000508564	P1
KRIT1	ENST00000688180.1	n.2648A>G		non_coding_transcript_exon_variant	7/7

Frequencies

GnomAD3 genomes AF: 0.100 AC: 15226 AN: 152144 Hom.: 981 Cov.: 32

Gnomad AFR AF: 0.0263

Gnomad AMI AF: 0.293

Gnomad AMR AF: 0.0806

Gnomad ASJ AF: 0.109

Gnomad EAS AF: 0.0266

Gnomad SAS AF: 0.104

Gnomad FIN AF: 0.155

Gnomad MID AF: 0.225

Gnomad NFE AF: 0.143

Gnomad OTH AF: 0.101

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.100 AC: 15221 AN: 152262 Hom.: 981 Cov.: 32 AF XY: 0.0994 AC XY: 7398 AN XY: 74440

Gnomad4 AFR AF: 0.0261

Gnomad4 AMR AF: 0.0804

Gnomad4 ASJ AF: 0.109

Gnomad4 EAS AF: 0.0266

Gnomad4 SAS AF: 0.104

Gnomad4 FIN AF: 0.155

Gnomad4 NFE AF: 0.143

Gnomad4 OTH AF: 0.102

Alfa AF: 0.127 Hom.: 271

Bravo AF: 0.0899

Asia WGS AF: 0.0910 AC: 316 AN: 3470

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Angiokeratoma corporis diffusum with arteriovenous fistulas Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Cerebral cavernous malformation Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.45
CADD	Benign	11
DANN	Benign	0.89

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: rs62467792; hg19: chr7-91828665;