dbSNP rs201877439: KRIT1:p.Gly88Gly (chr7-92237758-T-C) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_ModerateBP6BP7BS2

The NM_194454.3(KRIT1):c.264A>G(p.Gly88Gly) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000104 in 1,552,298 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 1 hom. )

Consequence

KRIT1
NM_194454.3 splice_region, synonymous

Scores

Splicing: ADA: 0.0006029

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 0.0110

Publications

0 publications found

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 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

KRIT1 links:

ENSG00000289027 (HGNC:):

ENSG00000289027 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.46).

BP6

Variant 7-92237758-T-C is Benign according to our data. Variant chr7-92237758-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 590739.

BP7

Synonymous conserved (PhyloP=0.011 with no splicing effect.

BS2

High AC in GnomAd4 at 10 AD gene.

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

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
KRIT1	NM_194454.3	MANE Select	c.264A>G	p.Gly88Gly	splice_region synonymous	Exon 6 of 19	NP_919436.1
KRIT1	NM_001350671.1		c.-320A>G		splice_region	Exon 5 of 18	NP_001337600.1
KRIT1	NM_001350672.1		c.264A>G	p.Gly88Gly	splice_region synonymous	Exon 4 of 17	NP_001337601.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
KRIT1	ENST00000394505.7	TSL:1 MANE Select	c.264A>G	p.Gly88Gly	splice_region synonymous	Exon 6 of 19	ENSP00000378013.2
ENSG00000289027	ENST00000692281.1		c.264A>G	p.Gly88Gly	splice_region synonymous	Exon 6 of 26	ENSP00000510568.1
ENSG00000285953	ENST00000458493.6	TSL:4	c.264A>G	p.Gly88Gly	splice_region synonymous	Exon 5 of 20	ENSP00000396352.2

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.000132

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000116

AC:

AN:

249904

AF XY:

0.000148

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000582

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000463

Gnomad NFE exome

AF:

0.000221

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000109

AC:

152

AN:

1400032

Hom.:

Cov.:

AF XY:

0.0000985

AC XY:

AN XY:

700264

show subpopulations

African (AFR)

AF:

0.0000310

AC:

AN:

32310

American (AMR)

AF:

0.0000898

AC:

AN:

44558

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25742

East Asian (EAS)

AF:

0.00

AC:

AN:

39210

South Asian (SAS)

AF:

0.00

AC:

AN:

84832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53342

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5648

European-Non Finnish (NFE)

AF:

0.000132

AC:

139

AN:

1056120

Other (OTH)

AF:

0.000137

AC:

AN:

58270

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.468

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74454

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41578

American (AMR)

AF:

0.00

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10600

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

67984

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000134

Hom.:

Bravo

AF:

0.0000907

EpiCase

AF:

0.000219

EpiControl

AF:

0.000178

ClinVar

ClinVar submissions as Germline

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cerebral cavernous malformation (1)

Inborn genetic diseases (1)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.46

CADD

Benign

(source)

DANN

Benign

0.79

PhyloP100

0.011

Mutation Taster

=77/23

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00060

dbscSNV1_RF

Benign

0.12

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over