rs149711883

Positions:

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_000094.4(COL7A1):c.4612C>T(p.Arg1538Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000471 in 1,614,012 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0027 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00024 ( 2 hom. )

Consequence

COL7A1
NM_000094.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.382

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 -19 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), COL7A1. . Gene score misZ 1.5899 (greater than the threshold 3.09). Trascript score misZ 4.0428 (greater than threshold 3.09). GenCC has associacion of gene with 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=0.013803422).

BP6

Variant 3-48582346-G-A is Benign according to our data. Variant chr3-48582346-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 75132.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00265 (404/152286) while in subpopulation AFR AF= 0.00902 (375/41558). AF 95% confidence interval is 0.00827. There are 2 homozygotes in gnomad4. There are 200 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/exons	MANE	Protein	UniProt
COL7A1	NM_000094.4 linkuse as main transcript	c.4612C>T	p.Arg1538Cys	missense_variant	47/119	ENST00000681320.1	NP_000085.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL7A1	ENST00000681320.1 linkuse as main transcript	c.4612C>T	p.Arg1538Cys	missense_variant	47/119		NM_000094.4	ENSP00000506558	P1	Q02388-1
COL7A1	ENST00000328333.12 linkuse as main transcript	c.4612C>T	p.Arg1538Cys	missense_variant	46/118	1		ENSP00000332371	P1	Q02388-1
COL7A1	ENST00000487017.5 linkuse as main transcript	n.529C>T		non_coding_transcript_exon_variant	12/83	5

Frequencies

GnomAD3 genomes

AF:

0.00267

AC:

406

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00910

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00157

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:

0.0000147

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.000717

AC:

180

AN:

251184

Hom.:

AF XY:

0.000567

AC XY:

AN XY:

135776

show subpopulations

Gnomad AFR exome

AF:

0.0100

Gnomad AMR exome

AF:

0.000318

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:

0.0000352

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000244

AC:

357

AN:

1461726

Hom.:

Cov.:

AF XY:

0.000228

AC XY:

166

AN XY:

727152

show subpopulations

Gnomad4 AFR exome

AF:

0.00830

Gnomad4 AMR exome

AF:

0.000425

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000207

Gnomad4 OTH exome

AF:

0.000563

GnomAD4 genome

AF:

0.00265

AC:

404

AN:

152286

Hom.:

Cov.:

AF XY:

0.00269

AC XY:

200

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.00902

Gnomad4 AMR

AF:

0.00157

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.000183

Hom.:

Bravo

AF:

0.00304

ESP6500AA

AF:

0.0104

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000857

AC:

104

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Epidermolysis bullosa dystrophica

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -
Benign, no assertion criteria provided	clinical testing	Natera, Inc.	Jan 16, 2020	- -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Sep 28, 2015	- -

COL7A1-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 04, 2023

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

0.16

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.17

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.63

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Benign

0.47

LIST_S2

Uncertain

0.97

MetaRNN

Benign

0.014

MetaSVM

Uncertain

0.60

MutationAssessor

Benign

1.5

MutationTaster

Benign

0.53

D;D

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-2.0

REVEL

Uncertain

0.38

Sift

Benign

0.060

Sift4G

Benign

0.12

Polyphen

1.0

Vest4

0.40

MVP

0.89

MPC

0.34

ClinPred

0.018

GERP RS

4.6

Varity_R

0.24

gMVP

0.92

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