rs7824025

chr8-138758473-A-Cchr8-138758473-A-Gchr8-138758473-A-T

Variant summary

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

The NM_152888.3(COL22A1):c.1902+1770T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.906 in 152,218 control chromosomes in the GnomAD database, including 62,603 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 0.91 (62603 hom., cov: 33)
• Consequence: COL22A1 NM_152888.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.586

Genes affected

COL22A1 (HGNC:22989): (collagen type XXII alpha 1 chain) This gene encodes member of the collagen family which is thought to contribute to the stabilization of myotendinous junctions and strengthen skeletal muscle attachments during contractile activity. It belongs to the fibril-associated collagens with interrupted triple helix (FACIT) subset of the collagen superfamily, which associate with collagen fibers through their C-terminal collagenous domains and mediate protein-protein interactions through their N-terminal noncollagenous domains. The encoded protein is deposited in the basement membrane zone of the myotendinous junction which is present only at the tissue junctions of muscles, tendons, the heart, articular cartilage, and skin. A knockdown of the orthologous zebrafish gene induces a muscular dystrophy by disruption of the myotendinous junction. [provided by RefSeq, May 2017]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.02).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.972 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL22A1	NM_152888.3	c.1902+1770T>G		intron_variant		ENST00000303045.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL22A1	ENST00000303045.11	c.1902+1770T>G		intron_variant		1	NM_152888.3	P1

Frequencies

GnomAD3 genomes AF: 0.906 AC: 137856 AN: 152100 Hom.: 62570 Cov.: 33

Gnomad AFR AF: 0.866

Gnomad AMI AF: 0.835

Gnomad AMR AF: 0.939

Gnomad ASJ AF: 0.932

Gnomad EAS AF: 0.994

Gnomad SAS AF: 0.938

Gnomad FIN AF: 0.965

Gnomad MID AF: 0.913

Gnomad NFE AF: 0.905

Gnomad OTH AF: 0.910

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

GnomAD4 genome AF: 0.906 AC: 137942 AN: 152218 Hom.: 62603 Cov.: 33 AF XY: 0.911 AC XY: 67827 AN XY: 74428

Gnomad4 AFR AF: 0.866

Gnomad4 AMR AF: 0.939

Gnomad4 ASJ AF: 0.932

Gnomad4 EAS AF: 0.994

Gnomad4 SAS AF: 0.939

Gnomad4 FIN AF: 0.965

Gnomad4 NFE AF: 0.905

Gnomad4 OTH AF: 0.909

Alfa AF: 0.909 Hom.: 83669

Bravo AF: 0.904

Asia WGS AF: 0.954 AC: 3319 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
Cadd	Benign	1.5
Dann	Benign	0.45

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: rs7824025; hg19: chr8-139770716;