rs771186535

Positions:

chr6-75130231-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP2PP3

The NM_004370.6(COL12A1):c.6070C>T(p.Pro2024Ser) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000843 in 1,612,460 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000089 ( 0 hom. )

Consequence

COL12A1
NM_004370.6 missense, splice_region

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 9.41

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 in gene, where missense usually causes diseases (based on misZ statistic), COL12A1. . Gene score misZ 2.106 (greater than the threshold 3.09). Trascript score misZ 3.5535 (greater than threshold 3.09). GenCC has associacion of gene with Bethlem myopathy, Bethlem myopathy 2, Ullrich congenital muscular dystrophy 2, Ullrich congenital muscular dystrophy.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.801

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL12A1	NM_004370.6 linkuse as main transcript	c.6070C>T	p.Pro2024Ser	missense_variant, splice_region_variant	37/66	ENST00000322507.13	NP_004361.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL12A1	ENST00000322507.13 linkuse as main transcript	c.6070C>T	p.Pro2024Ser	missense_variant, splice_region_variant	37/66	1	NM_004370.6	ENSP00000325146	P4	Q99715-1
COL12A1	ENST00000345356.10 linkuse as main transcript	c.2578C>T	p.Pro860Ser	missense_variant, splice_region_variant	22/51	1		ENSP00000305147		Q99715-2
COL12A1	ENST00000483888.6 linkuse as main transcript	c.6070C>T	p.Pro2024Ser	missense_variant, splice_region_variant	37/65	5		ENSP00000421216	A1
COL12A1	ENST00000416123.6 linkuse as main transcript	c.6070C>T	p.Pro2024Ser	missense_variant, splice_region_variant	36/63	5		ENSP00000412864		Q99715-4

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152096

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000122

AC:

AN:

246844

Hom.:

AF XY:

0.00000746

AC XY:

AN XY:

133960

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:

0.0000268

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000890

AC:

130

AN:

1460364

Hom.:

Cov.:

AF XY:

0.0000977

AC XY:

AN XY:

726570

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000226

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:

0.000111

Gnomad4 OTH exome

AF:

0.0000996

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152096

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74286

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:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000847

Hom.:

Bravo

AF:

0.0000416

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000519

AC:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Sep 19, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Apr 06, 2021	Has not been previously published as pathogenic or benign to our knowledge; Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID #566034; Landrum et al., 2016); Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function -

Bethlem myopathy 2;C4225314:Ullrich congenital muscular dystrophy 2

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Apr 23, 2023	This variant is present in population databases (rs771186535, gnomAD 0.004%). 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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 566034). This variant has not been reported in the literature in individuals affected with COL12A1-related conditions. This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 2024 of the COL12A1 protein (p.Pro2024Ser). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Uncertain

0.027

BayesDel_noAF

Benign

-0.090

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.027

T;T;.;.;.

Eigen

Pathogenic

0.99

Eigen_PC

Pathogenic

0.97

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.92

D;D;D;D;D

M_CAP

Benign

0.040

MetaRNN

Pathogenic

0.80

D;D;D;D;D

MetaSVM

Benign

-0.32

MutationAssessor

Uncertain

2.6

.;M;.;M;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.77

PROVEAN

Uncertain

-2.6

.;D;N;D;D

REVEL

Uncertain

0.38

Sift

Benign

0.030

.;D;T;D;D

Sift4G

Uncertain

0.0020

D;D;D;D;D

Polyphen

1.0, 1.0

.;D;D;.;.

Vest4

0.86

MutPred

0.65

.;Gain of phosphorylation at P2024 (P = 0.0166);.;Gain of phosphorylation at P2024 (P = 0.0166);Gain of phosphorylation at P2024 (P = 0.0166);

MVP

0.61

MPC

0.57

ClinPred

0.92

GERP RS

6.0

Varity_R

0.27

gMVP

0.75

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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