10-104032269-C-T

Position:

chr10-104032269-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_000494.4(COL17A1):c.4460G>A(p.Arg1487Gln) variant causes a missense change. The variant allele was found at a frequency of 0.0000458 in 1,614,004 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 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

COL17A1
NM_000494.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.35

Variant links:

Genes affected

COL17A1 (HGNC:2194): (collagen type XVII alpha 1 chain) This gene encodes the alpha chain of type XVII collagen. Unlike most collagens, collagen XVII is a transmembrane protein. Collagen XVII is a structural component of hemidesmosomes, multiprotein complexes at the dermal-epidermal basement membrane zone that mediate adhesion of keratinocytes to the underlying membrane. Mutations in this gene are associated with both generalized atrophic benign and junctional epidermolysis bullosa. Two homotrimeric forms of type XVII collagen exist. The full length form is the transmembrane protein. A soluble form, referred to as either ectodomain or LAD-1, is generated by proteolytic processing of the full length form. [provided by RefSeq, Jul 2008]

COL17A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.1844208).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL17A1	NM_000494.4 linkuse as main transcript	c.4460G>A	p.Arg1487Gln	missense_variant	56/56	ENST00000648076.2	NP_000485.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL17A1	ENST00000648076.2 linkuse as main transcript	c.4460G>A	p.Arg1487Gln	missense_variant	56/56		NM_000494.4	ENSP00000497653	A2	Q9UMD9-1
COL17A1	ENST00000369733.8 linkuse as main transcript	c.4214G>A	p.Arg1405Gln	missense_variant	51/51	5		ENSP00000358748	P4	Q9UMD9-2
COL17A1	ENST00000433822.1 linkuse as main transcript	c.167G>A	p.Arg56Gln	missense_variant	3/4	5		ENSP00000388832
COL17A1	ENST00000647647.1 linkuse as main transcript	c.*530G>A		3_prime_UTR_variant, NMD_transcript_variant	5/5			ENSP00000497865

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000410

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000358

AC:

AN:

251390

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135880

show subpopulations

Gnomad AFR exome

AF:

0.000431

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:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000390

AC:

AN:

1461688

Hom.:

Cov.:

AF XY:

0.0000468

AC XY:

AN XY:

727172

show subpopulations

Gnomad4 AFR exome

AF:

0.000448

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000207

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000112

AC:

AN:

152316

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74490

show subpopulations

Gnomad4 AFR

AF:

0.000409

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000216

Hom.:

Bravo

AF:

0.000110

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 23, 2022

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 1487 of the COL17A1 protein (p.Arg1487Gln). This variant is present in population databases (rs148509618, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with COL17A1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.082

BayesDel_noAF

Uncertain

-0.080

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.31

.;T;T

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.71

T;.;T

M_CAP

Benign

0.050

MetaRNN

Benign

0.18

T;T;T

MetaSVM

Uncertain

0.37

MutationAssessor

Benign

0.55

.;N;N

MutationTaster

Benign

0.57

D;D

PrimateAI

Benign

0.41

PROVEAN

Benign

-0.39

N;N;.

REVEL

Uncertain

0.39

Sift

Uncertain

0.0040

D;D;.

Sift4G

Uncertain

0.040

D;D;.

Polyphen

1.0

.;D;D

Vest4

0.42

MVP

0.85

MPC

0.075

ClinPred

0.34

GERP RS

5.6

Varity_R

0.17

gMVP

0.31

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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