rs41269303

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 1P and 16B. PP2BP4_StrongBP6_Very_StrongBS1

The NM_004370.6(COL12A1):c.6641A>G(p.Gln2214Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000149 in 1,613,036 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q2214E) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00087 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000075 ( 0 hom. )

Consequence

COL12A1
NM_004370.6 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 7.61

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -15 ACMG points.

PP2

Missense variant where missense usually causes diseases, COL12A1

BP4

Computational evidence support a benign effect (MetaRNN=0.008113027).

BP6

Variant 6-75124338-T-C is Benign according to our data. Variant chr6-75124338-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 475890.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 = 0.000867 (132/152228) while in subpopulation AFR AF= 0.00291 (121/41538). AF 95% confidence interval is 0.00249. There are 0 homozygotes in gnomad4. There are 55 alleles in male gnomad4 subpopulation. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL12A1	NM_004370.6 linkuse as main transcript	c.6641A>G	p.Gln2214Arg	missense_variant	41/66	ENST00000322507.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL12A1	ENST00000322507.13 linkuse as main transcript	c.6641A>G	p.Gln2214Arg	missense_variant	41/66	1	NM_004370.6	P4	Q99715-1
COL12A1	ENST00000345356.10 linkuse as main transcript	c.3149A>G	p.Gln1050Arg	missense_variant	26/51	1			Q99715-2
COL12A1	ENST00000483888.6 linkuse as main transcript	c.6641A>G	p.Gln2214Arg	missense_variant	41/65	5		A1
COL12A1	ENST00000416123.6 linkuse as main transcript	c.6641A>G	p.Gln2214Arg	missense_variant	40/63	5			Q99715-4

Frequencies

GnomAD3 genomes

AF:

0.000868

AC:

132

AN:

152110

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00292

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000459

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:

0.0000294

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.000198

AC:

AN:

247718

Hom.:

AF XY:

0.000119

AC XY:

AN XY:

134402

show subpopulations

Gnomad AFR exome

AF:

0.00304

Gnomad AMR exome

AF:

0.00

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:

0.00000889

Gnomad OTH exome

AF:

0.000167

GnomAD4 exome

AF:

0.0000746

AC:

109

AN:

1460808

Hom.:

Cov.:

AF XY:

0.0000606

AC XY:

AN XY:

726630

show subpopulations

Gnomad4 AFR exome

AF:

0.00269

Gnomad4 AMR exome

AF:

0.0000672

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.000249

GnomAD4 genome

AF:

0.000867

AC:

132

AN:

152228

Hom.:

Cov.:

AF XY:

0.000739

AC XY:

AN XY:

74436

show subpopulations

Gnomad4 AFR

AF:

0.00291

Gnomad4 AMR

AF:

0.000458

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000311

Hom.:

Bravo

AF:

0.000994

ESP6500AA

AF:

0.00355

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000315

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Sep 14, 2020

- -

Bethlem myopathy 2;C4225314:Ullrich congenital muscular dystrophy 2

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Dec 30, 2023

- -

COL12A1-related condition

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 06, 2020

This variant is classified as likely 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

0.075

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.52

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Benign

0.024

T;T;.;.;.

Eigen

Benign

0.16

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.90

D;D;D;D;D

M_CAP

Benign

0.013

MetaRNN

Benign

0.0081

T;T;T;T;T

MetaSVM

Benign

-1.1

MutationTaster

Benign

0.92

D;D;D;D

PrimateAI

Benign

0.37

Sift4G

Benign

0.17

T;T;T;T;T

Polyphen

0.37, 0.20

.;B;B;.;.

Vest4

0.34

MVP

0.52

MPC

0.56

ClinPred

0.048

GERP RS

5.4

Varity_R

0.14

gMVP

0.54

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over