chr9-123356538-G-A

Position:

• chr9-123356538-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_173689.7(CRB2):​c.94+184G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0082 in 148,658 control chromosomes in the GnomAD database, including 20 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: 𝑓 0.0082 (20 hom., cov: 29)
• Consequence: CRB2 NM_173689.7 intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.338

Genes affected

CRB2 (HGNC:18688): (crumbs cell polarity complex component 2) This gene encodes a member of a family of proteins that are components of the Crumbs cell polarity complex. In mammals, members of this family are thought to play a role in many cellular processes in early embryonic development. A similar protein in Drosophila determines apicobasal polarity in embryonic epithelial cells. Mutations in this gene are associated with focal segmental glomerulosclerosis 9, and with ventriculomegaly with cystic kidney disease. [provided by RefSeq, Aug 2016]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).
• BP6: Variant 9-123356538-G-A is Benign according to our data. Variant chr9-123356538-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 1212825.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0082 (1219/148658) while in subpopulation AFR AF= 0.0288 (1157/40188). AF 95% confidence interval is 0.0274. There are 20 homozygotes in gnomad4. There are 591 alleles in male gnomad4 subpopulation. Median coverage is 29. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 20 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CRB2	NM_173689.7	c.94+184G>A		intron_variant		ENST00000373631.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CRB2	ENST00000373631.8	c.94+184G>A		intron_variant		1	NM_173689.7	P1
CRB2	ENST00000359999.7	c.94+184G>A		intron_variant		2

Frequencies

GnomAD3 genomes AF: 0.00806 AC: 1197 AN: 148550 Hom.: 17 Cov.: 29

Gnomad AFR AF: 0.0283

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00225

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000426

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00645

Gnomad NFE AF: 0.000237

Gnomad OTH AF: 0.00441

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00820 AC: 1219 AN: 148658 Hom.: 20 Cov.: 29 AF XY: 0.00818 AC XY: 591 AN XY: 72272

Gnomad4 AFR AF: 0.0288

Gnomad4 AMR AF: 0.00225

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000426

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000237

Gnomad4 OTH AF: 0.00437

Alfa AF: 0.00535 Hom.: 1

Bravo AF: 0.00865

Asia WGS AF: 0.00404 AC: 14 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Apr 04, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	3.2
DANN	Benign	0.84

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		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: rs79961016; hg19: chr9-126118817;