12-52691392-C-T

Variant names:

• chr12-52691392-C-T
• rs777810337
• NM_175078.3:c.1510G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_175078.3(KRT77):​c.1510G>A​(p.Gly504Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000125 in 1,600,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: KRT77 NM_175078.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.329
• Publications: 1 publications found

Genes affected

KRT77 (HGNC:20411): (keratin 77) Keratins are intermediate filament proteins responsible for the structural integrity of epithelial cells and are subdivided into epithelial keratins and hair keratins. This gene encodes an epithelial keratin that is expressed in the skin and eccrine sweat glands. The type II keratins are clustered in a region of chromosome 12q13.[provided by RefSeq, Jun 2009]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16791457).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_175078.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRT77	NM_175078.3	MANE Select	c.1510G>A	p.Gly504Ser	missense	Exon 9 of 9	NP_778253.2	Q7Z794

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRT77	ENST00000341809.8	TSL:1 MANE Select	c.1510G>A	p.Gly504Ser	missense	Exon 9 of 9	ENSP00000342710.3	Q7Z794
	KRT77	ENST00000553168.1	TSL:1	n.*848G>A		non_coding_transcript_exon	Exon 10 of 10	ENSP00000448207.1	F8VS61
	KRT77	ENST00000553168.1	TSL:1	n.*848G>A		3_prime_UTR	Exon 10 of 10	ENSP00000448207.1	F8VS61

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152174 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

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

GnomAD2 exomes AF: 0.0000132 AC: 3 AN: 227826 AF XY: 0.0000159

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000172

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.91e-7 AC: 1 AN: 1447904 Hom.: 0 Cov.: 43 AF XY: 0.00000139 AC XY: 1 AN XY: 720122

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33272

American (AMR) AF: 0.00 AC: 0 AN: 44130

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25768

East Asian (EAS) AF: 0.0000253 AC: 1 AN: 39544

South Asian (SAS) AF: 0.00 AC: 0 AN: 85506

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 45426

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5410

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1108946

Other (OTH) AF: 0.00 AC: 0 AN: 59902

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152174 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74346

African (AFR) AF: 0.00 AC: 0 AN: 41434

American (AMR) AF: 0.00 AC: 0 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5186

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68032

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.00000837 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.082
BayesDel_addAF	Benign	-0.034	T
BayesDel_noAF	Uncertain	-0.060
CADD	Benign	9.6
DANN	Benign	0.94
DEOGEN2	Benign	0.0020	T
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.43
FATHMM_MKL	Benign	0.091	N
LIST_S2	Benign	0.20	T
M_CAP	Benign	0.049	D
MetaRNN	Benign	0.17	T
MetaSVM	Uncertain	0.38	D
MutationAssessor	Benign	0.95	L
PhyloP100		-0.33
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-0.71	N
REVEL	Uncertain	0.32
Sift	Benign	0.34	T
Sift4G	Benign	0.27	T
Polyphen		1.0	D
Vest4		0.19
MutPred		0.29		Gain of phosphorylation at G504 (P = 0.0062)
MVP		0.79
MPC		0.19
ClinPred		0.24	T
GERP RS		3.6
Varity_R		0.044
gMVP		0.59
Mutation Taster		=87/13	polymorphism

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

Other links and lift over

dbSNP: rs777810337; hg19: chr12-53085176; COSMIC: COSV59238691; COSMIC: COSV59238691;