6-33180660-C-G

Variant names:

• chr6-33180660-C-G
• rs1161495896
• NM_080680.3:c.1284+8G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_080680.3(COL11A2):​c.1284+8G>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000689 in 1,451,186 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: COL11A2 NM_080680.3 splice_region, intron
• Scores: Splicing: ADA: 0.00005625
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0670
• Publications: 0 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: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL11A2	NM_080680.3	c.1284+8G>C		splice_region_variant, intron_variant	Intron 11 of 65	ENST00000341947.7	NP_542411.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL11A2	ENST00000341947.7	c.1284+8G>C		splice_region_variant, intron_variant	Intron 11 of 65	5	NM_080680.3	ENSP00000339915.2
COL11A2	ENST00000374708.8	c.1026+8G>C		splice_region_variant, intron_variant	Intron 9 of 63	5		ENSP00000363840.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.89e-7 AC: 1 AN: 1451186 Hom.: 0 Cov.: 32 AF XY: 0.00000139 AC XY: 1 AN XY: 720976

African (AFR) AF: 0.00 AC: 0 AN: 33338

American (AMR) AF: 0.00 AC: 0 AN: 43440

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25750

East Asian (EAS) AF: 0.00 AC: 0 AN: 39422

South Asian (SAS) AF: 0.00 AC: 0 AN: 84646

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51632

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5674

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107338

Other (OTH) AF: 0.0000167 AC: 1 AN: 59946

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	6.1
DANN	Benign	0.68
PhyloP100		-0.067
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000056
dbscSNV1_RF	Benign	0.018
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

Other links and lift over

dbSNP: rs1161495896; hg19: chr6-33148437;