chr12-52691353-C-T

Variant names:

• chr12-52691353-C-T
• rs762222509
• NM_175078.3:c.1549G>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_175078.3(KRT77):​c.1549G>A​(p.Gly517Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000208 in 1,444,058 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: KRT77 NM_175078.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.162

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

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07950187).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRT77	NM_175078.3	c.1549G>A	p.Gly517Arg	missense_variant	Exon 9 of 9	ENST00000341809.8	NP_778253.2
KRT77	XM_011538288.3	c.850G>A	p.Gly284Arg	missense_variant	Exon 9 of 9		XP_011536590.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRT77	ENST00000341809.8	c.1549G>A	p.Gly517Arg	missense_variant	Exon 9 of 9	1	NM_175078.3	ENSP00000342710.3
KRT77	ENST00000553168.1	n.*887G>A		non_coding_transcript_exon_variant	Exon 10 of 10	1		ENSP00000448207.1
KRT77	ENST00000553168.1	n.*887G>A		3_prime_UTR_variant	Exon 10 of 10	1		ENSP00000448207.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000900 AC: 2 AN: 222322 Hom.: 0 AF XY: 0.0000164 AC XY: 2 AN XY: 122316

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000675

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000208 AC: 3 AN: 1444058 Hom.: 0 Cov.: 43 AF XY: 0.00000279 AC XY: 2 AN XY: 718078

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: 0.0000351

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	5.9
DANN	Benign	0.86
DEOGEN2	Benign	0.0090	T
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.013	N
LIST_S2	Benign	0.29	T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.080	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.0	N
PrimateAI	Uncertain	0.71	T
PROVEAN	Uncertain	-2.4	N
REVEL	Benign	0.18
Sift	Benign	0.045	D
Sift4G	Benign	0.066	T
Polyphen		0.0010	B
Vest4		0.18
MutPred		0.43		Gain of methylation at G517 (P = 0.0055);
MVP		0.38
MPC		0.22
ClinPred		0.053	T
GERP RS		-7.6
Varity_R		0.084
gMVP		0.58

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

Other links and lift over

dbSNP: rs762222509; hg19: chr12-53085137;