NM_000094.4:c.1907G>T

Variant names:

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_000094.4(COL7A1):c.1907G>T(p.Gly636Val) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00615 in 1,614,038 control chromosomes in the GnomAD database, including 42 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0041 ( 2 hom., cov: 32)

Exomes 𝑓: 0.0064 ( 40 hom. )

Consequence

COL7A1
NM_000094.4 missense, splice_region

Scores

Splicing: ADA: 0.8821

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:7

Conservation

PhyloP100: 1.12

Variant links:

Genes affected

COL7A1 (HGNC:2214): (collagen type VII alpha 1 chain) This gene encodes the alpha chain of type VII collagen. The type VII collagen fibril, composed of three identical alpha collagen chains, is restricted to the basement zone beneath stratified squamous epithelia. It functions as an anchoring fibril between the external epithelia and the underlying stroma. Mutations in this gene are associated with all forms of dystrophic epidermolysis bullosa. In the absence of mutations, however, an acquired form of this disease can result from an autoimmune response made to type VII collagen. [provided by RefSeq, Jul 2008]

COL7A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP2

Missense variant in the COL7A1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 223 curated pathogenic missense variants (we use a threshold of 10). The gene has 262 curated benign missense variants. Gene score misZ: 1.5899 (below the threshold of 3.09). Trascript score misZ: 4.0428 (above the threshold of 3.09). GenCC associations: The gene is linked to recessive dystrophic epidermolysis bullosa, dystrophic epidermolysis bullosa pruriginosa, recessive dystrophic epidermolysis bullosa-generalized other, transient bullous dermolysis of the newborn, epidermolysis bullosa with congenital localized absence of skin and deformity of nails, generalized dominant dystrophic epidermolysis bullosa, dystrophic epidermolysis bullosa, nails only, acral dystrophic epidermolysis bullosa, recessive dystrophic epidermolysis bullosa inversa, pretibial dystrophic epidermolysis bullosa.

BP4

Computational evidence support a benign effect (MetaRNN=0.009537309).

BP6

Variant 3-48590356-C-A is Benign according to our data. Variant chr3-48590356-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 502658.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=4, Benign=1, Uncertain_significance=2}.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00413 (628/152210) while in subpopulation NFE AF= 0.00685 (466/67996). AF 95% confidence interval is 0.00634. There are 2 homozygotes in gnomad4. There are 292 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL7A1	NM_000094.4 link	c.1907G>T	p.Gly636Val	missense_variant, splice_region_variant	Exon 16 of 119	ENST00000681320.1	NP_000085.1	Q02388-1Q59F16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL7A1	ENST00000681320.1 link	c.1907G>T	p.Gly636Val	missense_variant, splice_region_variant	Exon 16 of 119		NM_000094.4	ENSP00000506558.1		Q02388-1
COL7A1	ENST00000328333.12 link	c.1907G>T	p.Gly636Val	missense_variant, splice_region_variant	Exon 15 of 118	1		ENSP00000332371.8		Q02388-1

Frequencies

GnomAD3 genomes

AF:

0.00412

AC:

627

AN:

152092

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00126

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00504

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00160

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00685

Gnomad OTH

AF:

0.00480

GnomAD3 exomes

AF:

0.00422

AC:

1058

AN:

250912

Hom.:

AF XY:

0.00425

AC XY:

576

AN XY:

135656

show subpopulations

Gnomad AFR exome

AF:

0.00111

Gnomad AMR exome

AF:

0.00336

Gnomad ASJ exome

AF:

0.00179

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00227

Gnomad NFE exome

AF:

0.00737

Gnomad OTH exome

AF:

0.00343

GnomAD4 exome

AF:

0.00636

AC:

9294

AN:

1461828

Hom.:

Cov.:

AF XY:

0.00615

AC XY:

4473

AN XY:

727224

show subpopulations

Gnomad4 AFR exome

AF:

0.00114

Gnomad4 AMR exome

AF:

0.00378

Gnomad4 ASJ exome

AF:

0.00153

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00200

Gnomad4 NFE exome

AF:

0.00774

Gnomad4 OTH exome

AF:

0.00548

GnomAD4 genome

AF:

0.00413

AC:

628

AN:

152210

Hom.:

Cov.:

AF XY:

0.00392

AC XY:

292

AN XY:

74410

show subpopulations

Gnomad4 AFR

AF:

0.00128

Gnomad4 AMR

AF:

0.00504

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00160

Gnomad4 NFE

AF:

0.00685

Gnomad4 OTH

AF:

0.00475

Alfa

AF:

0.00596

Hom.:

Bravo

AF:

0.00426

TwinsUK

AF:

0.00755

AC:

ALSPAC

AF:

0.00545

AC:

ESP6500AA

AF:

0.00136

AC:

ESP6500EA

AF:

0.00593

AC:

ExAC

AF:

0.00419

AC:

509

EpiCase

AF:

0.00671

EpiControl

AF:

0.00735

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:4Benign:3

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jun 22, 2017

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 28, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 10, 2018

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 32707200, 26076072, 27153395) -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Apr 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

COL7A1: BP4, BS2 -

Epidermolysis bullosa dystrophica

Benign:2

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Jan 28, 2019

Biomedical Innovation Departament, CIEMAT

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: research

- -

Recessive dystrophic epidermolysis bullosa;C0268371:Dominant dystrophic epidermolysis bullosa with absence of skin;C0432321:Pretibial dystrophic epidermolysis bullosa;C0432322:Generalized dominant dystrophic epidermolysis bullosa;C1275114:Epidermolysis bullosa pruriginosa;C1843761:Nonsyndromic congenital nail disorder 8;C1851573:Transient bullous dermolysis of the newborn

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Epidermolysis bullosa dystrophica inversa, autosomal recessive

Benign:1

Jan 02, 2020

Natera, Inc.

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

COL7A1-related disorder

Benign:1

Sep 27, 2022

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.26

CADD

Benign

DANN

Benign

0.79

DEOGEN2

Benign

0.21

Eigen

Uncertain

0.37

Eigen_PC

Uncertain

0.25

FATHMM_MKL

Benign

0.61

LIST_S2

Benign

0.68

M_CAP

Benign

0.024

MetaRNN

Benign

0.0095

MetaSVM

Benign

-0.39

MutationAssessor

Uncertain

2.3

PrimateAI

Benign

0.40

PROVEAN

Benign

-1.3

REVEL

Uncertain

0.34

Sift

Uncertain

0.0020

Sift4G

Pathogenic

0.0

Polyphen

0.99

Vest4

0.52

MVP

0.85

MPC

0.31

ClinPred

0.029

GERP RS

4.4

Varity_R

0.39

gMVP

0.45

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.88

dbscSNV1_RF

Benign

0.49

SpliceAI score (max)

0.090

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