Genetic Variant CRYBG2:p.Arg1651Lys (chr1-26322002-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001039775.4(CRYBG2):c.4952G>A(p.Arg1651Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00000187 in 1,604,694 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CRYBG2
NM_001039775.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.35

Variant links:

Genes affected

CRYBG2 (HGNC:17295): (crystallin beta-gamma domain containing 2) Predicted to enable carbohydrate binding activity. [provided by Alliance of Genome Resources, Apr 2022]

CRYBG2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRYBG2	NM_001039775.4 link	c.4952G>A	p.Arg1651Lys	missense_variant	Exon 20 of 20	ENST00000308182.10	NP_001034864.2	Q8N1P7Q9NWG5
CRYBG2	XM_011541673.3 link	c.5123G>A	p.Arg1708Lys	missense_variant	Exon 20 of 20		XP_011539975.1
CRYBG2	XM_005245918.3 link	c.4952G>A	p.Arg1651Lys	missense_variant	Exon 20 of 20		XP_005245975.1	Q8N1P7
CRYBG2	XM_011541672.2 link	c.4916G>A	p.Arg1639Lys	missense_variant	Exon 19 of 19		XP_011539974.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CRYBG2	ENST00000308182.10 link	c.4952G>A	p.Arg1651Lys	missense_variant	Exon 20 of 20	5	NM_001039775.4	ENSP00000310435.6	Q8N1P7
CRYBG2	ENST00000475866.3 link	c.5924G>A	p.Arg1975Lys	missense_variant	Exon 22 of 22	4		ENSP00000428746.2	E7ET48
CRYBG2	ENST00000374208.1 link	n.430G>A		non_coding_transcript_exon_variant	Exon 4 of 4	5
CRYBG2	ENST00000374211.5 link	n.566G>A		non_coding_transcript_exon_variant	Exon 4 of 4	3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152162

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000405

AC:

AN:

246746

Hom.:

AF XY:

0.00000750

AC XY:

AN XY:

133422

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000553

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000138

AC:

AN:

1452532

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

720568

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000254

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152162

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74334

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 23, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4952G>A (p.R1651K) alteration is located in exon 20 (coding exon 19) of the AIM1L gene. This alteration results from a G to A substitution at nucleotide position 4952, causing the arginine (R) at amino acid position 1651 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Uncertain

0.037

BayesDel_noAF

Benign

-0.18

CADD

Benign

DANN

Benign

0.97

Eigen

Uncertain

0.27

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.72

T;T

M_CAP

Benign

0.029

MetaRNN

Uncertain

0.43

T;T

MetaSVM

Benign

-1.0

PrimateAI

Benign

0.43

REVEL

Benign

0.24

Sift4G

Benign

0.091

.;T

Vest4

0.50

MVP

0.68

ClinPred

0.90

GERP RS

5.3

gMVP

0.57

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

Other links and lift over