chr17-50188780-C-G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BP6BS2

The NM_000088.4(COL1A1):c.3061G>C(p.Glu1021Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000281 in 1,613,918 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00029 ( 0 hom. )

Consequence

COL1A1
NM_000088.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:2O:1

Conservation

PhyloP100: 7.67

Variant links:

Genes affected

COL1A1 (HGNC:2197): (collagen type I alpha 1 chain) This gene encodes the pro-alpha1 chains of type I collagen whose triple helix comprises two alpha1 chains and one alpha2 chain. Type I is a fibril-forming collagen found in most connective tissues and is abundant in bone, cornea, dermis and tendon. Mutations in this gene are associated with osteogenesis imperfecta types I-IV, Ehlers-Danlos syndrome type VIIA, Ehlers-Danlos syndrome Classical type, Caffey Disease and idiopathic osteoporosis. Reciprocal translocations between chromosomes 17 and 22, where this gene and the gene for platelet-derived growth factor beta are located, are associated with a particular type of skin tumor called dermatofibrosarcoma protuberans, resulting from unregulated expression of the growth factor. Two transcripts, resulting from the use of alternate polyadenylation signals, have been identified for this gene. [provided by R. Dalgleish, Feb 2008]

COL1A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PP2

Missense variant in the COL1A1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 368 curated pathogenic missense variants (we use a threshold of 10). The gene has 98 curated benign missense variants. Gene score misZ: 3.5319 (above the threshold of 3.09). Trascript score misZ: 5.7733 (above the threshold of 3.09). GenCC associations: The gene is linked to Caffey disease, Ehlers-Danlos/osteogenesis imperfecta syndrome, combined osteogenesis imperfecta and Ehlers-Danlos syndrome 1, Ehlers-Danlos syndrome, arthrochalasia type, osteogenesis imperfecta type 3, Ehlers-Danlos syndrome, classic type, 1, high bone mass osteogenesis imperfecta, osteogenesis imperfecta type 4, Ehlers-Danlos syndrome, classic type, osteogenesis imperfecta type 2, osteogenesis imperfecta type 1.

BP6

Variant 17-50188780-C-G is Benign according to our data. Variant chr17-50188780-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 526861.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=5, not_provided=1}. Variant chr17-50188780-C-G is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 23 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL1A1	NM_000088.4 link	c.3061G>C	p.Glu1021Gln	missense_variant	Exon 42 of 51	ENST00000225964.10	NP_000079.2	P02452
COL1A1	XM_011524341.2 link	c.2863G>C	p.Glu955Gln	missense_variant	Exon 39 of 48		XP_011522643.1
COL1A1	XM_005257058.5 link	c.2791G>C	p.Glu931Gln	missense_variant	Exon 40 of 49		XP_005257115.2
COL1A1	XM_005257059.5 link	c.2143G>C	p.Glu715Gln	missense_variant	Exon 29 of 38		XP_005257116.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL1A1	ENST00000225964.10 link	c.3061G>C	p.Glu1021Gln	missense_variant	Exon 42 of 51	1	NM_000088.4	ENSP00000225964.6	P02452
COL1A1	ENST00000511732.1 link	n.5G>C		non_coding_transcript_exon_variant	Exon 1 of 2	2
COL1A1	ENST00000486572.1 link	n.-226G>C		upstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

151948

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000968

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.000206

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000179

AC:

AN:

251314

Hom.:

AF XY:

0.000235

AC XY:

AN XY:

135888

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.000145

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:

0.000334

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000294

AC:

430

AN:

1461852

Hom.:

Cov.:

AF XY:

0.000304

AC XY:

221

AN XY:

727232

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.000371

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000151

AC:

AN:

152066

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.0000965

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000112

Hom.:

Bravo

AF:

0.000155

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000157

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000415

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:2Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Jul 01, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Occurs in the triple helical domain at the Y position in the canonical Gly-X-Y repeat; although this variant may have an effect on normal protein folding and function, missense substitution at the Y position is not a common mechanism of disease (HGMD); In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Mar 27, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The COL1A1 c.3061G>C; p.Glu1021Gln variant (rs139593707), to our knowledge, is not reported in the medical literature but is reported in ClinVar (Variation ID: 526861). This variant is found in the general population with an overall allele frequency of 0.02% (51/282622 alleles) in the Genome Aggregation Database (v2.1.1). Computational analyses are uncertain whether this variant is neutral or deleterious (REVEL: 0.487). Due to limited information, the clinical significance of this variant is uncertain at this time. -

Osteogenesis imperfecta

Uncertain:1

Feb 01, 2020

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Ehlers-Danlos syndrome

Uncertain:1

Nov 16, 2021

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

COL1A1-related disorder

Uncertain:1

Aug 23, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The COL1A1 c.3061G>C variant is predicted to result in the amino acid substitution p.Glu1021Gln. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.032% of alleles in individuals of European (Non-Finnish) descent in gnomAD, which is more frequent than expected for a disease-causing variant in COL1A1. Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Cardiovascular phenotype

Uncertain:1

Oct 18, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.E1021Q variant (also known as c.3061G>C), located in coding exon 42 of the COL1A1 gene, results from a G to C substitution at nucleotide position 3061. The glutamic acid at codon 1021 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not specified

Benign:1

Jan 23, 2025

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: COL1A1 c.3061G>C (p.Glu1021Gln) results in a conservative amino acid change in 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 0.00018 in 251314 control chromosomes. The observed variant frequency is approximately 6 fold of the estimated maximal expected allele frequency for a pathogenic variant in COL1A1 causing Osteogenesis imperfecta type I phenotype (3e-05). To our knowledge, no occurrence of c.3061G>C in individuals affected with Osteogenesis imperfecta type I and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 526861). Based on the evidence outlined above, the variant was classified as likely benign. -

Osteogenesis imperfecta type I

Benign:1

Dec 27, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Infantile cortical hyperostosis;C0029434:Osteogenesis imperfecta;CN293783:Ehlers-Danlos syndrome, arthrochalasia type, 2

Other:1

GenomeConnect - Invitae Patient Insights Network

Significance: not provided

Review Status: no classification provided

Collection Method: phenotyping only

Variant classified as Likely benign and reported on 02-18-2020 by Invitae. GenomeConnect-Invitae Patient Insights Network assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. Registry team members make no attempt to reinterpret the clinical significance of the variant. Phenotypic details are available under supporting information. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.56

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Uncertain

-0.080

CADD

Uncertain

DANN

Uncertain

0.99

Eigen

Benign

0.13

Eigen_PC

Benign

0.17

FATHMM_MKL

Pathogenic

0.97

M_CAP

Uncertain

0.15

MetaRNN

Uncertain

0.47

MetaSVM

Uncertain

0.50

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.8

REVEL

Uncertain

0.49

Sift

Uncertain

0.011

Sift4G

Benign

0.15

Vest4

0.52

MVP

0.84

MPC

0.56

ClinPred

0.082

GERP RS

4.0

gMVP

0.69

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