rs200201449

Variant names:

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 1P and 9B. PP3BP6BS1BS2

The NM_004370.6(COL12A1):c.5221G>A(p.Glu1741Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00048 in 1,613,348 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00045 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00048 ( 2 hom. )

Consequence

COL12A1
NM_004370.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:2

Conservation

PhyloP100: 3.68

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 -8 ACMG points.

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BP6

Variant 6-75138457-C-T is Benign according to our data. Variant chr6-75138457-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 475873.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000453 (69/152288) while in subpopulation SAS AF= 0.00145 (7/4824). AF 95% confidence interval is 0.00068. There are 0 homozygotes in gnomad4. There are 31 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL12A1	NM_004370.6 link	c.5221G>A	p.Glu1741Lys	missense_variant	Exon 29 of 66	ENST00000322507.13	NP_004361.3	Q99715-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL12A1	ENST00000322507.13 link	c.5221G>A	p.Glu1741Lys	missense_variant	Exon 29 of 66	1	NM_004370.6	ENSP00000325146.8		Q99715-1

Frequencies

GnomAD3 genomes

AF:

0.000453

AC:

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.00720

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00145

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000368

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000842

AC:

209

AN:

248142

Hom.:

AF XY:

0.000877

AC XY:

118

AN XY:

134586

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000496

Gnomad ASJ exome

AF:

0.00630

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00135

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000710

Gnomad OTH exome

AF:

0.00133

GnomAD4 exome

AF:

0.000483

AC:

705

AN:

1461060

Hom.:

Cov.:

AF XY:

0.000527

AC XY:

383

AN XY:

726764

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.000449

Gnomad4 ASJ exome

AF:

0.00529

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00115

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000350

Gnomad4 OTH exome

AF:

0.000762

GnomAD4 genome

AF:

0.000453

AC:

AN:

152288

Hom.:

Cov.:

AF XY:

0.000416

AC XY:

AN XY:

74470

show subpopulations

Gnomad4 AFR

AF:

0.000120

Gnomad4 AMR

AF:

0.000392

Gnomad4 ASJ

AF:

0.00720

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00145

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000368

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000904

Hom.:

Bravo

AF:

0.000514

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000262

AC:

ESP6500EA

AF:

0.000843

AC:

ExAC

AF:

0.000803

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000764

EpiControl

AF:

0.00101

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Jun 01, 2016

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 09, 2021

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Uncertain:1

Dec 17, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: COL12A1 c.5221G>A (p.Glu1741Lys) results in a conservative amino acid change located in the Fibronectin type III domain (IPR003961) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00084 in 248142 control chromosomes in the gnomAD database, including 1 homozygotes. This frequency is not significantly higher than estimated for a pathogenic variant in COL12A1 causing Ullrich congenital muscular dystrophy 2 (0.00084 vs 0.0035), allowing no conclusion about variant significance. To our knowledge, no occurrence of c.5221G>A in individuals affected with Ullrich congenital muscular dystrophy 2 and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 475873). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Bethlem myopathy 2;C4225314:Ullrich congenital muscular dystrophy 2

Benign:1

Jan 21, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Uncertain

0.091

BayesDel_noAF

Pathogenic

0.32

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.026

T;T;.;.;.

Eigen

Uncertain

0.47

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.98

D;D;D;D;D

M_CAP

Benign

0.057

MetaRNN

Benign

0.036

T;T;T;T;T

MetaSVM

Uncertain

0.28

MutationAssessor

Pathogenic

3.0

.;M;.;M;.

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.4

.;N;N;N;N

REVEL

Uncertain

0.59

Sift

Benign

0.031

.;D;D;D;D

Sift4G

Uncertain

0.028

D;D;D;D;D

Polyphen

0.81, 0.88

.;P;P;.;.

Vest4

0.71

MVP

0.96

MPC

0.60

ClinPred

0.068

GERP RS

5.8

Varity_R

0.24

gMVP

0.67

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.78

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.78

Position offset: 3

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