2-181537304-C-T

Position:

• chr2-181537304-C-T

Variant summary

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

The NM_000885.6(ITGA4):​c.*1777C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.997 in 453,948 control chromosomes in the GnomAD database, including 225,533 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.99 (75033 hom., cov: 31)
  • Exomes 𝑓: 1.0 (150500 hom.)
• Consequence: ITGA4 NM_000885.6 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -2.33

Genes affected

ITGA4 (HGNC:6140): (integrin subunit alpha 4) The gene encodes a member of the integrin alpha chain family of proteins. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain that function in cell surface adhesion and signaling. The encoded preproprotein is proteolytically processed to generate light and heavy chains that comprise the alpha 4 subunit. This subunit associates with a beta 1 or beta 7 subunit to form an integrin that may play a role in cell motility and migration. This integrin is a therapeutic target for the treatment of multiple sclerosis, Crohn's disease and inflammatory bowel disease. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2015]

CERKL (HGNC:21699): (ceramide kinase like) This gene was initially identified as a locus (RP26) associated with an autosomal recessive form of retinitis pigmentosa (arRP) disease. This gene encodes a protein with ceramide kinase-like domains, however, the protein does not phosphorylate ceramide and its target substrate is currently unknown. This protein may be a negative regulator of apoptosis in photoreceptor cells. Mutations in this gene cause a form of retinitis pigmentosa characterized by autosomal recessive cone and rod dystrophy (arCRD). Alternative splicing of this gene results in multiple transcript variants encoding different isoforms and non-coding transcripts.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.0).
• BP6: Variant 2-181537304-C-T is Benign according to our data. Variant chr2-181537304-C-T is described in ClinVar as [Benign]. Clinvar id is 332987.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.994 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ITGA4	NM_000885.6	c.*1777C>T		3_prime_UTR_variant	28/28	ENST00000397033.7
CERKL	NM_201548.5	c.*880G>A		3_prime_UTR_variant	13/13	ENST00000410087.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ITGA4	ENST00000397033.7	c.*1777C>T		3_prime_UTR_variant	28/28	1	NM_000885.6	P1
CERKL	ENST00000410087.8	c.*880G>A		3_prime_UTR_variant	13/13	1	NM_201548.5	P1
CERKL	ENST00000684145.1	c.*880G>A		3_prime_UTR_variant	12/12

Frequencies

GnomAD3 genomes AF: 0.993 AC: 151002 AN: 152072 Hom.: 74983 Cov.: 31

Gnomad AFR AF: 0.977

Gnomad AMI AF: 1.00

Gnomad AMR AF: 0.996

Gnomad ASJ AF: 0.996

Gnomad EAS AF: 0.996

Gnomad SAS AF: 1.00

Gnomad FIN AF: 1.00

Gnomad MID AF: 1.00

Gnomad NFE AF: 1.00

Gnomad OTH AF: 0.994

GnomAD3 exomes AF: 0.998 AC: 127662 AN: 127950 Hom.: 63689 AF XY: 0.998 AC XY: 69967 AN XY: 70082

Gnomad AFR exome AF: 0.979

Gnomad AMR exome AF: 0.998

Gnomad ASJ exome AF: 0.995

Gnomad EAS exome AF: 0.994

Gnomad SAS exome AF: 1.00

Gnomad FIN exome AF: 1.00

Gnomad NFE exome AF: 1.00

Gnomad OTH exome AF: 0.998

GnomAD4 exome AF: 0.999 AC: 301376 AN: 301758 Hom.: 150500 Cov.: 0 AF XY: 0.999 AC XY: 171806 AN XY: 171972

Gnomad4 AFR exome AF: 0.981

Gnomad4 AMR exome AF: 0.998

Gnomad4 ASJ exome AF: 0.996

Gnomad4 EAS exome AF: 0.995

Gnomad4 SAS exome AF: 1.00

Gnomad4 FIN exome AF: 1.00

Gnomad4 NFE exome AF: 1.00

Gnomad4 OTH exome AF: 0.998

GnomAD4 genome AF: 0.993 AC: 151111 AN: 152190 Hom.: 75033 Cov.: 31 AF XY: 0.993 AC XY: 73889 AN XY: 74418

Gnomad4 AFR AF: 0.977

Gnomad4 AMR AF: 0.996

Gnomad4 ASJ AF: 0.996

Gnomad4 EAS AF: 0.996

Gnomad4 SAS AF: 1.00

Gnomad4 FIN AF: 1.00

Gnomad4 NFE AF: 1.00

Gnomad4 OTH AF: 0.994

Alfa AF: 0.996 Hom.: 13988

Bravo AF: 0.992

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Retinitis pigmentosa Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.16
DANN	Benign	0.53

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1037623; hg19: chr2-182402031;