dbSNP rs35170847: COL12A1:p.Thr827Thr (chr6-75175267-C-T) – ACMG Classification: Benign (-19 pts)

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_004370.6(COL12A1):c.2481G>A(p.Thr827Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000958 in 1,614,142 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0047 ( 6 hom., cov: 32)

Exomes 𝑓: 0.00057 ( 4 hom. )

Consequence

COL12A1
NM_004370.6 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.229

Publications

2 publications found

Variant links:

Genes affected

COL12A1 (HGNC:2188): (collagen type XII alpha 1 chain) This gene encodes the alpha chain of type XII collagen, a member of the FACIT (fibril-associated collagens with interrupted triple helices) collagen family. Type XII collagen is a homotrimer found in association with type I collagen, an association that is thought to modify the interactions between collagen I fibrils and the surrounding matrix. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

COL12A1 Gene-Disease associations (from GenCC):

Bethlem myopathy 2
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
Bethlem myopathy 2
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Illumina, Genomics England PanelApp
Ullrich congenital muscular dystrophy 2
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Bethlem myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Ullrich congenital muscular dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

COL12A1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.28).

BP6

Variant 6-75175267-C-T is Benign according to our data. Variant chr6-75175267-C-T is described in ClinVar as Benign. ClinVar VariationId is 259326.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.229 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00474 (721/152260) while in subpopulation AFR AF = 0.0161 (670/41532). AF 95% confidence interval is 0.0151. There are 6 homozygotes in GnomAd4. There are 328 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 6 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004370.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
COL12A1	NM_004370.6	MANE Select	c.2481G>A	p.Thr827Thr	synonymous	Exon 13 of 66	NP_004361.3
COL12A1	NM_001424113.1		c.2481G>A	p.Thr827Thr	synonymous	Exon 13 of 66	NP_001411042.1
COL12A1	NM_001424114.1		c.2481G>A	p.Thr827Thr	synonymous	Exon 13 of 65	NP_001411043.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
COL12A1	ENST00000322507.13	TSL:1 MANE Select	c.2481G>A	p.Thr827Thr	synonymous	Exon 13 of 66	ENSP00000325146.8	Q99715-1
COL12A1	ENST00000345356.10	TSL:1	c.74-22785G>A		intron	N/A	ENSP00000305147.9	Q99715-2
COL12A1	ENST00000483888.6	TSL:5	c.2481G>A	p.Thr827Thr	synonymous	Exon 13 of 65	ENSP00000421216.1	D6RGG3

Frequencies

GnomAD3 genomes

AF:

0.00471

AC:

717

AN:

152142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0161

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00190

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00382

GnomAD2 exomes

AF:

0.00134

AC:

333

AN:

249312

AF XY:

0.00112

show subpopulations

Gnomad AFR exome

AF:

0.0172

Gnomad AMR exome

AF:

0.00133

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000973

Gnomad OTH exome

AF:

0.000496

GnomAD4 exome

AF:

0.000565

AC:

826

AN:

1461882

Hom.:

Cov.:

AF XY:

0.000536

AC XY:

390

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.0184

AC:

615

AN:

33480

American (AMR)

AF:

0.00125

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000128

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00260

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000495

AC:

AN:

1112004

Other (OTH)

AF:

0.00123

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

147

196

245

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00474

AC:

721

AN:

152260

Hom.:

Cov.:

AF XY:

0.00441

AC XY:

328

AN XY:

74452

show subpopulations

African (AFR)

AF:

0.0161

AC:

670

AN:

41532

American (AMR)

AF:

0.00190

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.000414

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000147

AC:

AN:

68018

Other (OTH)

AF:

0.00378

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

132

165

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00215

Hom.:

Bravo

AF:

0.00546

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Bethlem myopathy 2;C4225314:Ullrich congenital muscular dystrophy 2 (1)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.28

CADD

Benign

7.7

(source)

DANN

Benign

0.48

PhyloP100

0.23

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over