rs141517088

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_004370.6(COL12A1):c.2275C>T(p.Pro759Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000428 in 1,614,026 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P759T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0021 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00025 ( 1 hom. )

Consequence

COL12A1
NM_004370.6 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 6.21

Publications

0 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: Labcorp Genetics (formerly Invitae), Orphanet
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 -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.007758945).

BP6

Variant 6-75177825-G-A is Benign according to our data. Variant chr6-75177825-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 259325.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00213 (324/152186) while in subpopulation AFR AF = 0.00706 (293/41512). AF 95% confidence interval is 0.00639. There are 2 homozygotes in GnomAd4. There are 142 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL12A1	NM_004370.6 link	c.2275C>T	p.Pro759Ser	missense_variant	Exon 12 of 66	ENST00000322507.13	NP_004361.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL12A1	ENST00000322507.13 link	c.2275C>T	p.Pro759Ser	missense_variant	Exon 12 of 66	1	NM_004370.6	ENSP00000325146.8

Frequencies

GnomAD3 genomes

AF:

0.00211

AC:

321

AN:

152068

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00701

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00125

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.000642

AC:

160

AN:

249410

AF XY:

0.000503

show subpopulations

Gnomad AFR exome

AF:

0.00749

Gnomad AMR exome

AF:

0.00101

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000354

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000251

AC:

367

AN:

1461840

Hom.:

Cov.:

AF XY:

0.000245

AC XY:

178

AN XY:

727226

show subpopulations

African (AFR)

AF:

0.00708

AC:

237

AN:

33478

American (AMR)

AF:

0.000939

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.000104

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.00139

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000234

AC:

AN:

1111994

Other (OTH)

AF:

0.000745

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

109

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.00213

AC:

324

AN:

152186

Hom.:

Cov.:

AF XY:

0.00191

AC XY:

142

AN XY:

74388

show subpopulations

African (AFR)

AF:

0.00706

AC:

293

AN:

41512

American (AMR)

AF:

0.00124

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000208

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10594

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68026

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.000437

Hom.:

Bravo

AF:

0.00254

ESP6500AA

AF:

0.00591

AC:

ESP6500EA

AF:

0.000244

AC:

ExAC

AF:

0.000811

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

Oct 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

COL12A1: BP4, BS2

May 18, 2021

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Bethlem myopathy 2;C4225314:Ullrich congenital muscular dystrophy 2

Benign:2

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant has not been reported in the literature but is present in 0.7% (290/41390) of African/African American alleles, including 2 homozygotes, in the Genome Aggregation Database (https://gnomad.broadinstitute.org/variant/6-75177825-G-A?dataset=gnomad_r3). This variant is present in ClinVar, with multiple laboratories classified as Likely Benign or Benign (Variation ID:259325). Computational predictive tools suggest that this variant does not impact the protein, but evolutionary conservation tools are unclear. In summary, data on this variant suggests that this variant does not cause disease but requires further evidence. Therefore, this variant is classified as likely benign.

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not specified

Benign:1

Aug 18, 2025

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

COL12A1-related disorder

Benign:1

Apr 14, 2021

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.39

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.18

T;.;.

Eigen

Benign

0.16

Eigen_PC

Uncertain

0.34

LIST_S2

Benign

0.84

T;T;T

MetaRNN

Benign

0.0078

T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.8

L;L;.

PhyloP100

6.2

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-2.7

D;D;D

Sift

Benign

0.086

T;T;T

Sift4G

Benign

0.082

T;T;T

Vest4

0.27

ClinPred

0.023

GERP RS

4.8

Varity_R

0.21

gMVP

0.62

Mutation Taster

=88/12

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over