2-233333701-C-T

Position:

• chr2-233333701-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000541.5(SAG):​c.807-1261C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.388 in 152,018 control chromosomes in the GnomAD database, including 13,587 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.39 (13582 hom., cov: 31)
  • Exomes 𝑓: 0.46 (5 hom.)
• Consequence: SAG NM_000541.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.455

Genes affected

SAG (HGNC:10521): (S-antigen visual arrestin) Members of arrestin/beta-arrestin protein family are thought to participate in agonist-mediated desensitization of G-protein-coupled receptors and cause specific dampening of cellular responses to stimuli such as hormones, neurotransmitters, or sensory signals. S-arrestin, also known as S-antigen, is a major soluble photoreceptor protein that is involved in desensitization of the photoactivated transduction cascade. It is expressed in the retina and the pineal gland and inhibits coupling of rhodopsin to transducin in vitro. Additionally, S-arrestin is highly antigenic, and is capable of inducing experimental autoimmune uveoretinitis. Mutations in this gene have been associated with Oguchi disease, a rare autosomal recessive form of night blindness. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.55 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SAG	NM_000541.5	c.807-1261C>T		intron_variant		ENST00000409110.6	NP_000532.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SAG	ENST00000409110.6	c.807-1261C>T		intron_variant		5	NM_000541.5	ENSP00000386444	P1

Frequencies

GnomAD3 genomes AF: 0.388 AC: 58970 AN: 151850 Hom.: 13590 Cov.: 31

Gnomad AFR AF: 0.138

Gnomad AMI AF: 0.464

Gnomad AMR AF: 0.358

Gnomad ASJ AF: 0.542

Gnomad EAS AF: 0.396

Gnomad SAS AF: 0.567

Gnomad FIN AF: 0.456

Gnomad MID AF: 0.490

Gnomad NFE AF: 0.514

Gnomad OTH AF: 0.412

GnomAD4 exome AF: 0.460 AC: 23 AN: 50 Hom.: 5 Cov.: 0 AF XY: 0.500 AC XY: 19 AN XY: 38

Gnomad4 AFR exome AF: 1.00

Gnomad4 EAS exome AF: 0.500

Gnomad4 FIN exome AF: 0.500

Gnomad4 NFE exome AF: 0.447

Gnomad4 OTH exome AF: 0.500

GnomAD4 genome AF: 0.388 AC: 58955 AN: 151968 Hom.: 13582 Cov.: 31 AF XY: 0.389 AC XY: 28880 AN XY: 74250

Gnomad4 AFR AF: 0.138

Gnomad4 AMR AF: 0.357

Gnomad4 ASJ AF: 0.542

Gnomad4 EAS AF: 0.395

Gnomad4 SAS AF: 0.568

Gnomad4 FIN AF: 0.456

Gnomad4 NFE AF: 0.514

Gnomad4 OTH AF: 0.408

Alfa AF: 0.495 Hom.: 38769

Bravo AF: 0.366

Asia WGS AF: 0.391 AC: 1362 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	1.4
DANN	Benign	0.29

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: rs1000141; hg19: chr2-234242347;