8-138766637-C-T

Position:

• chr8-138766637-C-T

Variant summary

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

The NM_152888.3(COL22A1):​c.1804-4171G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.51 in 151,898 control chromosomes in the GnomAD database, including 22,598 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 0.51 (22598 hom., cov: 32)
• Consequence: COL22A1 NM_152888.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.21

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]

COL22A1 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.95).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.82 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL22A1	NM_152888.3	c.1804-4171G>A		intron_variant		ENST00000303045.11	NP_690848.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL22A1	ENST00000303045.11	c.1804-4171G>A		intron_variant		1	NM_152888.3	ENSP00000303153.6

Frequencies

GnomAD3 genomes AF: 0.510 AC: 77425 AN: 151780 Hom.: 22583 Cov.: 32

Gnomad AFR AF: 0.212

Gnomad AMI AF: 0.621

Gnomad AMR AF: 0.663

Gnomad ASJ AF: 0.641

Gnomad EAS AF: 0.841

Gnomad SAS AF: 0.673

Gnomad FIN AF: 0.600

Gnomad MID AF: 0.595

Gnomad NFE AF: 0.597

Gnomad OTH AF: 0.546

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

GnomAD4 genome AF: 0.510 AC: 77456 AN: 151898 Hom.: 22598 Cov.: 32 AF XY: 0.519 AC XY: 38513 AN XY: 74270

Gnomad4 AFR AF: 0.212

Gnomad4 AMR AF: 0.663

Gnomad4 ASJ AF: 0.641

Gnomad4 EAS AF: 0.841

Gnomad4 SAS AF: 0.674

Gnomad4 FIN AF: 0.600

Gnomad4 NFE AF: 0.597

Gnomad4 OTH AF: 0.549

Alfa AF: 0.596 Hom.: 44919

Bravo AF: 0.502

Asia WGS AF: 0.714 AC: 2485 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.95
CADD	Benign	4.1
DANN	Benign	0.55

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: rs11166844; hg19: chr8-139778880;