rs886380438

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PP2BP4

The NM_004370.6(COL12A1):c.3638C>A(p.Ala1213Glu) variant causes a missense change. The variant allele was found at a frequency of 0.00000434 in 1,613,460 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

COL12A1
NM_004370.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 7.00

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 0 ACMG points.

PP2

Missense variant where missense usually causes diseases, COL12A1

BP4

Computational evidence support a benign effect (MetaRNN=0.31010956).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL12A1	NM_004370.6 linkuse as main transcript	c.3638C>A	p.Ala1213Glu	missense_variant	18/66	ENST00000322507.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL12A1	ENST00000322507.13 linkuse as main transcript	c.3638C>A	p.Ala1213Glu	missense_variant	18/66	1	NM_004370.6	P4	Q99715-1
COL12A1	ENST00000345356.10 linkuse as main transcript	c.146C>A	p.Ala49Glu	missense_variant	3/51	1			Q99715-2
COL12A1	ENST00000483888.6 linkuse as main transcript	c.3638C>A	p.Ala1213Glu	missense_variant	18/65	5		A1
COL12A1	ENST00000416123.6 linkuse as main transcript	c.3638C>A	p.Ala1213Glu	missense_variant	17/63	5			Q99715-4

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152076

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000402

AC:

AN:

248934

Hom.:

AF XY:

0.00000741

AC XY:

AN XY:

135030

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461384

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727018

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000360

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152076

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74272

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2022

The c.3638C>A (p.A1213E) alteration is located in exon 18 (coding exon 17) of the COL12A1 gene. This alteration results from a C to A substitution at nucleotide position 3638, causing the alanine (A) at amino acid position 1213 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 11, 2020

Has not been previously published as pathogenic or benign to our knowledge; Not observed at a significant frequency in large population cohorts (Lek et al., 2016); Reported in ClinVar but additional evidence is not available (ClinVar Variant ID #571448; Landrum et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function -

Bethlem myopathy 2;C4225314:Ullrich congenital muscular dystrophy 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Aug 22, 2023

This variant is present in population databases (no rsID available, gnomAD 0.002%). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt COL12A1 protein function. ClinVar contains an entry for this variant (Variation ID: 571448). This variant has not been reported in the literature in individuals affected with COL12A1-related conditions. This sequence change replaces alanine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 1213 of the COL12A1 protein (p.Ala1213Glu). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.38

BayesDel_addAF

Uncertain

0.012

BayesDel_noAF

Benign

-0.22

Cadd

Benign

Dann

Benign

0.70

DEOGEN2

Benign

0.017

T;T;.;.;.

Eigen

Benign

-0.13

Eigen_PC

Benign

0.12

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.67

T;T;T;T;T

M_CAP

Benign

0.019

MetaRNN

Benign

0.31

T;T;T;T;T

MetaSVM

Benign

-0.98

MutationTaster

Benign

0.54

N;N;N;N

PrimateAI

Uncertain

0.67

Sift4G

Uncertain

0.053

T;D;T;D;D

Polyphen

0.0020, 0.0

.;B;B;.;.

Vest4

0.36

MutPred

0.52

.;Loss of methylation at R1216 (P = 0.038);.;Loss of methylation at R1216 (P = 0.038);Loss of methylation at R1216 (P = 0.038);

MVP

0.43

MPC

0.17

ClinPred

0.56

GERP RS

5.7

Varity_R

0.27

gMVP

0.56

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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