2-181537205-G-C

Variant names:

• chr2-181537205-G-C
• rs200370399
• NM_000885.6:c.*1678G>C

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_000885.6(ITGA4):​c.*1678G>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000132 in 452,928 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.000013 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000013 (0 hom.)
• Consequence: ITGA4 NM_000885.6 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0780
• Publications: 0 publications found

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]

CERKL Gene-Disease associations (from GenCC):

• CERKL-related retinopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• retinitis pigmentosa 26

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• retinitis pigmentosa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ITGA4	NM_000885.6	c.*1678G>C		3_prime_UTR_variant	Exon 28 of 28	ENST00000397033.7	NP_000876.3
CERKL	NM_201548.5	c.*979C>G		3_prime_UTR_variant	Exon 13 of 13	ENST00000410087.8	NP_963842.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ITGA4	ENST00000397033.7	c.*1678G>C		3_prime_UTR_variant	Exon 28 of 28	1	NM_000885.6	ENSP00000380227.2
CERKL	ENST00000410087.8	c.*979C>G		3_prime_UTR_variant	Exon 13 of 13	1	NM_201548.5	ENSP00000386725.3
CERKL	ENST00000684145.1	c.*979C>G		3_prime_UTR_variant	Exon 12 of 12			ENSP00000508396.1
CERKL	ENST00000409440.7	c.*979C>G		downstream_gene_variant		2		ENSP00000387080.3

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151850 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

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: 0.0000295

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000133 AC: 4 AN: 301078 Hom.: 0 Cov.: 0 AF XY: 0.0000117 AC XY: 2 AN XY: 171630

African (AFR) AF: 0.00 AC: 0 AN: 8544

American (AMR) AF: 0.00 AC: 0 AN: 27266

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 10786

East Asian (EAS) AF: 0.00 AC: 0 AN: 9204

South Asian (SAS) AF: 0.00 AC: 0 AN: 59642

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 12296

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1150

European-Non Finnish (NFE) AF: 0.0000253 AC: 4 AN: 158190

Other (OTH) AF: 0.00 AC: 0 AN: 14000

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151850 Hom.: 0 Cov.: 33 AF XY: 0.0000270 AC XY: 2 AN XY: 74156

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41418

American (AMR) AF: 0.00 AC: 0 AN: 15224

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10572

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000295 AC: 2 AN: 67858

Other (OTH) AF: 0.00 AC: 0 AN: 2078

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.029673), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	1.3
DANN	Benign	0.36
PhyloP100		0.078

Splicing

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

Other links and lift over

dbSNP: rs200370399; hg19: chr2-182401932;