chr6-33171763-G-A

Variant names:

• chr6-33171763-G-A
• rs121912947
• NM_080680.3:c.3100C>T

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PM1 PM2 PP3_Strong PP5_Very_Strong

The NM_080680.3(COL11A2):​c.3100C>T​(p.Arg1034Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,674 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1034H) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: COL11A2 NM_080680.3 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 0.656
• Publications: 5 publications found

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 Gene-Disease associations (from GenCC):

• autosomal dominant nonsyndromic hearing loss 13

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P
• nonsyndromic genetic hearing loss

  Inheritance: AD, AR Classification: DEFINITIVE, MODERATE Submitted by: ClinGen
• otospondylomegaepiphyseal dysplasia, autosomal dominant

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: PanelApp Australia, Ambry Genetics, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P
• autosomal recessive nonsyndromic hearing loss 53

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• otospondylomegaepiphyseal dysplasia

  Inheritance: AR, AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• otospondylomegaepiphyseal dysplasia, autosomal recessive

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: PanelApp Australia, Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• autosomal dominant nonsyndromic hearing loss

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• fibrochondrogenesis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 9 uncertain in NM_080680.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.951
• PP5: Variant 6-33171763-G-A is Pathogenic according to our data. Variant chr6-33171763-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 17124.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL11A2	NM_080680.3	c.3100C>T	p.Arg1034Cys	missense_variant	Exon 42 of 66	ENST00000341947.7	NP_542411.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL11A2	ENST00000341947.7	c.3100C>T	p.Arg1034Cys	missense_variant	Exon 42 of 66	5	NM_080680.3	ENSP00000339915.2
COL11A2	ENST00000374708.8	c.2842C>T	p.Arg948Cys	missense_variant	Exon 40 of 64	5		ENSP00000363840.4
COL11A2	ENST00000477772.1	n.272+5246C>T		intron_variant	Intron 5 of 8	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1460674 Hom.: 0 Cov.: 38 AF XY: 0.00 AC XY: 0 AN XY: 726660

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86244

European-Finnish (FIN) AF: 0.0000191 AC: 1 AN: 52288

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111978

Other (OTH) AF: 0.0000166 AC: 1 AN: 60374

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:3

Dec 20, 2024

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed in large population cohorts (gnomAD); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 15372529, 33105617, 10581026) -

Apr 18, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is not present in population databases (gnomAD no frequency). For these reasons, this variant has been classified as Pathogenic. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt COL11A2 protein function. ClinVar contains an entry for this variant (Variation ID: 17124). This variant is also known as p.Arg549Cys. This missense change has been observed in individual(s) with autosomal dominant deafness (PMID: 10581026, 33105617). It has also been observed to segregate with disease in related individuals. This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 1034 of the COL11A2 protein (p.Arg1034Cys). -

Aug 01, 2017

CeGaT Center for Human Genetics Tuebingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

COL11A2-related disorder Pathogenic:1

Sep 05, 2023

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The COL11A2 c.3100C>T variant is predicted to result in the amino acid substitution p.Arg1034Cys. This variant has been reported to segregate with autosomal dominant nonsyndromic hearing loss in a large family with 24 affected individuals (described as p.Arg549Cys, McGuirt. 1999. PubMed ID: 10581026) and was also reported in a single apparently unrelated individual with nonsyndromic hearing loss (Morgan. 2020. PubMed ID: 33105617). This variant has not been reported in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. This variant is interpreted as pathogenic. -

Rare genetic deafness Pathogenic:1

Aug 15, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Arg1034Cys variant in COL11A2 has been reported in 3 unrelated individuals with hearing loss and segregated in 25 affected relatives in 2 families with au tosomal dominant nonsyndromic sensorineural hearing loss (McGuirt 1999, LMM data ). It has not been identified in large population studies. Computational predict ion tools and conservation analysis suggest that the variant may impact the prot ein. Variants in COL11A2 have been associated with both dominant and recessive h earing loss that can be either syndromic or nonsyndromic. However, there have be en only 2 families with autosomal dominant nonsyndromic hearing loss with signif icant segregation data in the published literature (McGuirt 1999). In summary, a lthough additional studies are required to fully establish its clinical signific ance, the p.Arg1034Cys variant is likely pathogenic. -

Autosomal dominant nonsyndromic hearing loss 13 Pathogenic:1

Dec 01, 1999

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.47
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Benign	0.090	T;T;.
Eigen	Uncertain	0.31
Eigen_PC	Uncertain	0.24
FATHMM_MKL	Benign	0.66	D
M_CAP	Pathogenic	0.62	D
MetaRNN	Pathogenic	0.95	D;D;D
MetaSVM	Uncertain	0.57	D
PhyloP100		0.66
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-5.9	D;D;D
REVEL	Pathogenic	0.79
Sift	Pathogenic	0.0	D;D;D
Sift4G	Uncertain	0.0080	D;D;D
Vest4		0.69
MutPred		0.80		.;Loss of methylation at R1034 (P = 0.0091);.;
MVP		0.99
MPC		1.1
ClinPred		1.0	D
GERP RS		3.0
gMVP		0.47
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs121912947; hg19: chr6-33139540; COSMIC: COSV59497876;