chr6-33173687-C-T

Position:

• chr6-33173687-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BP6_Very_Strong

The NM_080680.3(COL11A2):​c.2628+14G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000609 in 1,558,770 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.000087 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000058 (0 hom.)
• Consequence: COL11A2 NM_080680.3 intron
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 0.0500

Genes affected

COL11A2 (HGNC:2187): (collagen type XI alpha 2 chain) This gene encodes one of the two alpha chains of type XI collagen, a minor fibrillar collagen. It is located on chromosome 6 very close to but separate from the gene for retinoid X receptor beta. Type XI collagen is a heterotrimer but the third alpha chain is a post-translationally modified alpha 1 type II chain. Proteolytic processing of this type XI chain produces PARP, a proline/arginine-rich protein that is an amino terminal domain. Mutations in this gene are associated with type III Stickler syndrome, otospondylomegaepiphyseal dysplasia (OSMED syndrome), Weissenbacher-Zweymuller syndrome, autosomal dominant non-syndromic sensorineural type 13 deafness (DFNA13), and autosomal recessive non-syndromic sensorineural type 53 deafness (DFNB53). Alternative splicing results in multiple transcript variants. A related pseudogene is located nearby on chromosome 6. [provided by RefSeq, Jul 2009]

COL11A2 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 6-33173687-C-T is Benign according to our data. Variant chr6-33173687-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 505214.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-33173687-C-T is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL11A2	NM_080680.3	c.2628+14G>A		intron_variant		ENST00000341947.7	NP_542411.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL11A2	ENST00000341947.7	c.2628+14G>A		intron_variant		5	NM_080680.3	ENSP00000339915.2
COL11A2	ENST00000374708.8	c.2370+14G>A		intron_variant		5		ENSP00000363840.4
COL11A2	ENST00000361917.6	c.1200+14G>A		intron_variant		5		ENSP00000355123.2
COL11A2	ENST00000477772.1	n.272+3322G>A		intron_variant		2

Frequencies

GnomAD3 genomes AF: 0.0000869 AC: 13 AN: 149656 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00221

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: 0.000164

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000108 AC: 22 AN: 204512 Hom.: 0 AF XY: 0.000154 AC XY: 17 AN XY: 110310

Gnomad AFR exome AF: 0.0000724

Gnomad AMR exome AF: 0.0000339

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000214

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000582 AC: 82 AN: 1409114 Hom.: 0 Cov.: 31 AF XY: 0.0000605 AC XY: 42 AN XY: 694728

Gnomad4 AFR exome AF: 0.0000626

Gnomad4 AMR exome AF: 0.0000252

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000720

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000869 AC: 13 AN: 149656 Hom.: 0 Cov.: 31 AF XY: 0.0000821 AC XY: 6 AN XY: 73096

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000164

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000174 Hom.: 0

Bravo AF: 0.0000907

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 11, 2017	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jul 21, 2016	c.2628+14G>A in intron 35 of COL11A2: This variant is not expected to have clini cal significance because it is not located within the splice consensus sequence. It has been identified in 10/56344 European chromosomes by the Exome Aggregati on Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs559123089). -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 18, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	6.6
DANN	Benign	0.38

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: rs559123089; hg19: chr6-33141464;