3-186539091-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_017541.4(CRYGS):c.265-123G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00441 in 1,234,522 control chromosomes in the GnomAD database, including 158 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.019 (94 hom., cov: 32)
  • Exomes 𝑓: 0.0023 (64 hom.)
• Consequence: CRYGS NM_017541.4 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.693

Genes affected

CRYGS (HGNC:2417): (crystallin gamma S) Crystallins are separated into two classes: taxon-specific, or enzyme, and ubiquitous. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. Since lens central fiber cells lose their nuclei during development, these crystallins are made and then retained throughout life, making them extremely stable proteins. Mammalian lens crystallins are divided into alpha, beta, and gamma families; beta and gamma crystallins are also considered as a superfamily. Alpha and beta families are further divided into acidic and basic groups. Seven protein regions exist in crystallins: four homologous motifs, a connecting peptide, and N- and C-terminal extensions. Gamma-crystallins are a homogeneous group of highly symmetrical, monomeric proteins typically lacking connecting peptides and terminal extensions. They are differentially regulated after early development. This gene encodes a protein initially considered to be a beta-crystallin but the encoded protein is monomeric and has greater sequence similarity to other gamma-crystallins. This gene encodes the most significant gamma-crystallin in adult eye lens tissue. Whether due to aging or mutations in specific genes, gamma-crystallins have been involved in cataract formation. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 3-186539091-C-T is Benign according to our data. Variant chr3-186539091-C-T is described in ClinVar as [Benign]. Clinvar id is 1275580.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0652 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CRYGS	NM_017541.4	c.265-123G>A		intron_variant		ENST00000307944.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CRYGS	ENST00000307944.6	c.265-123G>A		intron_variant		1	NM_017541.4	P1
CRYGS	ENST00000460288.1	n.1167-123G>A		intron_variant, non_coding_transcript_variant		1
CRYGS	ENST00000392499.6	c.265-123G>A		intron_variant		2		P1

Frequencies

GnomAD3 genomes AF: 0.0193 AC: 2935 AN: 152118 Hom.: 91 Cov.: 32

Gnomad AFR AF: 0.0670

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00661

Gnomad ASJ AF: 0.00202

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000415

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.000338

Gnomad OTH AF: 0.0120

GnomAD4 exome AF: 0.00230 AC: 2489 AN: 1082288 Hom.: 64 AF XY: 0.00198 AC XY: 1087 AN XY: 548922

Gnomad4 AFR exome AF: 0.0704

Gnomad4 AMR exome AF: 0.00639

Gnomad4 ASJ exome AF: 0.00200

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000150

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000179

Gnomad4 OTH exome AF: 0.00524

GnomAD4 genome AF: 0.0194 AC: 2959 AN: 152234 Hom.: 94 Cov.: 32 AF XY: 0.0184 AC XY: 1373 AN XY: 74438

Gnomad4 AFR AF: 0.0673

Gnomad4 AMR AF: 0.00661

Gnomad4 ASJ AF: 0.00202

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000415

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000338

Gnomad4 OTH AF: 0.0132

Alfa AF: 0.0139 Hom.: 9

Bravo AF: 0.0223

Asia WGS AF: 0.00462 AC: 16 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Oct 01, 2018

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
Cadd	Benign	1.6
Dann	Benign	0.28

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: rs73887943; hg19: chr3-186256880;