rs72821893

Positions:

• chr17-40751196-C-A
• chr17-40751196-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_181534.4(KRT25):​c.800G>T​(p.Arg267Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,824 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: KRT25 NM_181534.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.90

Genes affected

KRT25 (HGNC:30839): (keratin 25) This gene encodes a member of the type I (acidic) keratin family, which belongs to the superfamily of intermediate filament (IF) proteins. Keratins are heteropolymeric structural proteins which form the intermediate filament. These filaments, along with actin microfilaments and microtubules, compose the cytoskeleton of epithelial cells. The type I keratin genes are clustered in a region of chromosome 17q12-q21. [provided by RefSeq, Jul 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.905

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRT25	NM_181534.4	c.800G>T	p.Arg267Leu	missense_variant	4/8	ENST00000312150.5	NP_853512.1
KRT25	XM_011524414.2	c.794G>T	p.Arg265Leu	missense_variant	5/9		XP_011522716.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRT25	ENST00000312150.5	c.800G>T	p.Arg267Leu	missense_variant	4/8	1	NM_181534.4	ENSP00000310573	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461824 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727214

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.0000224

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: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.49
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	D
Eigen	Pathogenic	0.69
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.82	T
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Uncertain	0.75	D
MutationAssessor	Benign	2.0	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.50	T
PROVEAN	Pathogenic	-5.5	D
REVEL	Uncertain	0.59
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.043	D
Polyphen		1.0	D
Vest4		0.73
MutPred		0.70		Loss of disorder (P = 0.044);
MVP		0.85
MPC		0.42
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.81
gMVP		0.95

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

Other links and lift over

dbSNP: rs72821893; hg19: chr17-38907448;