rs200487396

chr6-75131984-G-Achr6-75131984-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PP2PP3_ModerateBP6

The NM_004370.6(COL12A1):c.5893C>T(p.Arg1965Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000275 in 1,614,114 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1965H) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00029 ( 1 hom. )

Consequence

COL12A1
NM_004370.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:2B:1

Conservation

PhyloP100: 2.58

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 Uncertain_significance. Variant got 2 ACMG points.

PP2

Missense variant where missense usually causes diseases, COL12A1

PP3

MetaRNN computational evidence supports a deleterious effect, 0.909

BP6

Variant 6-75131984-G-A is Benign according to our data. Variant chr6-75131984-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 204297.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL12A1	NM_004370.6 linkuse as main transcript	c.5893C>T	p.Arg1965Cys	missense_variant	35/66	ENST00000322507.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL12A1	ENST00000322507.13 linkuse as main transcript	c.5893C>T	p.Arg1965Cys	missense_variant	35/66	1	NM_004370.6	P4	Q99715-1
COL12A1	ENST00000345356.10 linkuse as main transcript	c.2401C>T	p.Arg801Cys	missense_variant	20/51	1			Q99715-2
COL12A1	ENST00000483888.6 linkuse as main transcript	c.5893C>T	p.Arg1965Cys	missense_variant	35/65	5		A1
COL12A1	ENST00000416123.6 linkuse as main transcript	c.5893C>T	p.Arg1965Cys	missense_variant	34/63	5			Q99715-4

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000176

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000124

AC:

AN:

249266

Hom.:

AF XY:

0.000148

AC XY:

AN XY:

135218

show subpopulations

Gnomad AFR exome

AF:

0.000258

Gnomad AMR exome

AF:

0.0000579

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:

0.000221

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000289

AC:

423

AN:

1461814

Hom.:

Cov.:

AF XY:

0.000285

AC XY:

207

AN XY:

727208

show subpopulations

Gnomad4 AFR exome

AF:

0.000239

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000358

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000138

AC:

AN:

152300

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.000217

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000176

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000153

Hom.:

Bravo

AF:

0.000181

ESP6500AA

AF:

0.000495

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000140

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000296

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Aug 16, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 14, 2022	Functional studies on patient-derived fibroblast cells showed less abundant and disorganized collagen XII with significant intracellular retention (Hicks et al., 2014), though no in vivo functional studies have been performed to date; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 28306225, 24334769, 31273343, 31509352, 32629534, 30409984) -

Bethlem myopathy 2

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

May 01, 2014

- -

Bethlem myopathy 2;C4225314:Ullrich congenital muscular dystrophy 2

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Oct 29, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.61

BayesDel_addAF

Benign

-0.034

BayesDel_noAF

Uncertain

0.010

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Benign

0.20

T;D;.;.;.

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Uncertain

0.92

LIST_S2

Pathogenic

0.98

D;D;D;D;D

M_CAP

Benign

0.080

MetaRNN

Pathogenic

0.91

D;D;D;D;D

MetaSVM

Uncertain

0.0046

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.55

Sift4G

Pathogenic

0.0

D;D;D;D;D

Polyphen

1.0

.;D;D;.;.

Vest4

0.86

MVP

0.64

MPC

0.64

ClinPred

0.69

GERP RS

5.3

Varity_R

0.45

gMVP

0.72

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