chr8-101570345-C-T

Variant names:

• chr8-101570345-C-T
• rs766515922
• NM_024915.4:c.685C>T

Variant summary

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

The NM_024915.4(GRHL2):​c.685C>T​(p.Arg229Trp) variant causes a missense change. The variant allele was found at a frequency of 0.0000109 in 1,461,484 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: GRHL2 NM_024915.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 5.09

Genes affected

GRHL2 (HGNC:2799): (grainyhead like transcription factor 2) The protein encoded by this gene is a transcription factor that can act as a homodimer or as a heterodimer with either GRHL1 or GRHL3. Defects in this gene are a cause of non-syndromic sensorineural deafness autosomal dominant type 28 (DFNA28).[provided by RefSeq, Mar 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRHL2	NM_024915.4	c.685C>T	p.Arg229Trp	missense_variant	Exon 5 of 16	ENST00000646743.1	NP_079191.2
GRHL2	NM_001330593.2	c.637C>T	p.Arg213Trp	missense_variant	Exon 5 of 16		NP_001317522.1
GRHL2	XM_011517306.4	c.637C>T	p.Arg213Trp	missense_variant	Exon 5 of 16		XP_011515608.1
GRHL2	XM_011517307.4	c.685C>T	p.Arg229Trp	missense_variant	Exon 5 of 16		XP_011515609.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRHL2	ENST00000646743.1	c.685C>T	p.Arg229Trp	missense_variant	Exon 5 of 16		NM_024915.4	ENSP00000495564.1
GRHL2	ENST00000395927.1	c.637C>T	p.Arg213Trp	missense_variant	Exon 5 of 16	2		ENSP00000379260.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000199 AC: 5 AN: 251366 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135854

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000109 AC: 16 AN: 1461484 Hom.: 0 Cov.: 30 AF XY: 0.00000825 AC XY: 6 AN XY: 727054

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.000112

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000720

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000151

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

May 05, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Arg229Trp variant in GRHL2 has not been previously reported in individuals with hearing loss, but has been identified in 1/16506 South Asian chromosomes a nd 1/11564 Latino chromosomes by the Exome Aggregation Consortium (ExAC, http:// exac.broadinstitute.org; dbSNP rs766515922). Although this variant has been seen in the general population, its frequency is not high enough to rule out a patho genic role. Computational prediction tools and conservation analysis do not prov ide strong support for or against an impact to the protein. In summary, the clin ical significance of the p.Arg229Trp variant is uncertain. -

not provided Uncertain:1

Feb 02, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is present in population databases (rs766515922, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with GRHL2-related conditions. ClinVar contains an entry for this variant (Variation ID: 504944). 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: "Deleterious"; PolyPhen-2: "Probably Damaging"; 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. This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 229 of the GRHL2 protein (p.Arg229Trp). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Uncertain	0.043	T
BayesDel_noAF	Uncertain	0.050
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.29	T;T;.
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.96	.;D;D
M_CAP	Benign	0.019	T
MetaRNN	Uncertain	0.53	D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.2	M;M;.
PrimateAI	Uncertain	0.69	T
PROVEAN	Uncertain	-2.8	D;.;D
REVEL	Benign	0.28
Sift	Uncertain	0.021	D;.;D
Sift4G	Benign	0.16	T;.;T
Polyphen		0.21	B;B;.
Vest4		0.72
MutPred		0.63		Loss of disorder (P = 0.0347);Loss of disorder (P = 0.0347);.;
MVP		0.35
MPC		1.1
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.23
gMVP		0.56

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs766515922; hg19: chr8-102582573; COSMIC: COSV104573581;