Genetic Variant GRK1:p.Ala11Val (chr13-113667418-C-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_002929.3(GRK1):c.32C>T(p.Ala11Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000208 in 1,444,560 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

GRK1
NM_002929.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.63

Publications

0 publications found

Variant links:

Genes affected

GRK1 (HGNC:10013): (G protein-coupled receptor kinase 1) This gene encodes a member of the guanine nucleotide-binding protein (G protein)-coupled receptor kinase subfamily of the Ser/Thr protein kinase family. The protein phosphorylates rhodopsin and initiates its deactivation. Defects in GRK1 are known to cause Oguchi disease 2 (also known as stationary night blindness Oguchi type-2). [provided by RefSeq, Jul 2008]

GRK1 Gene-Disease associations (from GenCC):

Oguchi disease
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
Oguchi disease-2
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P

GRK1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.753

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRK1	NM_002929.3 link	c.32C>T	p.Ala11Val	missense_variant	Exon 1 of 7	ENST00000335678.7	NP_002920.1	Q15835
GRK1	XM_047430493.1 link	c.-6-2269C>T		intron_variant	Intron 1 of 6		XP_047286449.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRK1	ENST00000335678.7 link	c.32C>T	p.Ala11Val	missense_variant	Exon 1 of 7	1	NM_002929.3	ENSP00000334876.5		Q15835

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000208

AC:

AN:

1444560

Hom.:

Cov.:

AF XY:

0.00000419

AC XY:

AN XY:

716436

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33024

American (AMR)

AF:

0.00

AC:

AN:

43294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25164

East Asian (EAS)

AF:

0.00

AC:

AN:

39194

South Asian (SAS)

AF:

0.00

AC:

AN:

84014

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52288

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5706

European-Non Finnish (NFE)

AF:

0.00000272

AC:

AN:

1102262

Other (OTH)

AF:

0.00

AC:

AN:

59614

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Mar 20, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.32C>T (p.A11V) alteration is located in exon 1 (coding exon 1) of the GRK1 gene. This alteration results from a C to T substitution at nucleotide position 32, causing the alanine (A) at amino acid position 11 to be replaced by a valine (V). 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

Pathogenic

0.91

BayesDel_addAF

Pathogenic

0.28

BayesDel_noAF

Pathogenic

0.16

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.64

Eigen

Uncertain

0.66

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.94

M_CAP

Pathogenic

0.49

MetaRNN

Pathogenic

0.75

MetaSVM

Uncertain

0.20

PhyloP100

5.6

PrimateAI

Pathogenic

0.84

PROVEAN

Uncertain

-3.0

REVEL

Pathogenic

0.74

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0020

Polyphen

1.0

Vest4

0.56

MutPred

0.71

Gain of catalytic residue at F15 (P = 0.0021);

MVP

0.93

MPC

0.43

ClinPred

0.99

GERP RS

5.2

PromoterAI

-0.0048

Neutral

(source)

Varity_R

0.82

gMVP

0.68

Mutation Taster

=6/94

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over