12-52514988-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000424.4(KRT5):c.1727A>G(p.Lys576Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,461,402 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: KRT5 NM_000424.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.22

Genes affected

KRT5 (HGNC:6442): (keratin 5) The protein encoded by this gene is a member of the keratin gene family. The type II cytokeratins consist of basic or neutral proteins which are arranged in pairs of heterotypic keratin chains coexpressed during differentiation of simple and stratified epithelial tissues. This type II cytokeratin is specifically expressed in the basal layer of the epidermis with family member KRT14. Mutations in these genes have been associated with a complex of diseases termed epidermolysis bullosa simplex. The type II cytokeratins are clustered in a region of chromosome 12q12-q13. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KRT5	NM_000424.4	c.1727A>G	p.Lys576Arg	missense_variant	9/9	ENST00000252242.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KRT5	ENST00000252242.9	c.1727A>G	p.Lys576Arg	missense_variant	9/9	1	NM_000424.4	P1
KRT5	ENST00000552952.1			downstream_gene_variant		2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461402 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726982

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2022

The c.1727A>G (p.K576R) alteration is located in exon 9 (coding exon 9) of the KRT5 gene. This alteration results from a A to G substitution at nucleotide position 1727, causing the lysine (K) at amino acid position 576 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.039	T
BayesDel_noAF	Benign	-0.18
Cadd	Benign	23
Dann	Uncertain	0.99
DEOGEN2	Benign	0.29	T
Eigen	Uncertain	0.41
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.57	T
M_CAP	Benign	0.033	D
MetaRNN	Uncertain	0.44	T
MetaSVM	Benign	-0.40	T
MutationAssessor	Benign	0.73	N
MutationTaster	Benign	0.93	N
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-1.6	N
REVEL	Uncertain	0.38
Sift	Benign	0.50	T
Sift4G	Benign	0.62	T
Polyphen		0.99	D
Vest4		0.47
MutPred		0.36		Loss of methylation at K576 (P = 0.0152);
MVP		0.86
MPC		0.18
ClinPred		0.87	D
GERP RS		5.5
Varity_R		0.11
gMVP		0.41

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-52908772;