Genetic Variant GRK1:p.Pro391Arg (chr13-113731321-C-G) – ACMG Classification: Likely_pathogenic (8 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1PM2PM5PP3_Moderate

The NM_002929.3(GRK1):c.1172C>G(p.Pro391Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000144 in 1,384,766 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P391H) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

GRK1
NM_002929.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.44

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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

PM1

In a domain Protein kinase (size 265) in uniprot entity GRK1_HUMAN there are 8 pathogenic changes around while only 2 benign (80%) in NM_002929.3

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr13-113731321-C-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 13012.Status of the report is no_assertion_criteria_provided, 0 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.905

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRK1	NM_002929.3 link	c.1172C>G	p.Pro391Arg	missense_variant	Exon 5 of 7	ENST00000335678.7	NP_002920.1	Q15835
GRK1	XM_047430493.1 link	c.467C>G	p.Pro156Arg	missense_variant	Exon 5 of 7		XP_047286449.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRK1	ENST00000335678.7 link	c.1172C>G	p.Pro391Arg	missense_variant	Exon 5 of 7	1	NM_002929.3	ENSP00000334876.5		Q15835
GRK1	ENST00000545304.1 link	n.155C>G		non_coding_transcript_exon_variant	Exon 2 of 4	4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000144

AC:

AN:

1384766

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

683336

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31594

American (AMR)

AF:

0.00

AC:

AN:

35692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25176

East Asian (EAS)

AF:

0.00

AC:

AN:

35734

South Asian (SAS)

AF:

0.00

AC:

AN:

79234

European-Finnish (FIN)

AF:

0.00

AC:

AN:

34898

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5694

European-Non Finnish (NFE)

AF:

0.00000185

AC:

AN:

1078840

Other (OTH)

AF:

0.00

AC:

AN:

57904

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.96

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.16

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.50

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.94

M_CAP

Benign

0.075

MetaRNN

Pathogenic

0.90

MetaSVM

Benign

-0.47

PhyloP100

2.4

PrimateAI

Pathogenic

0.87

PROVEAN

Pathogenic

-8.6

REVEL

Uncertain

0.62

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0020

Polyphen

1.0

Vest4

0.73

MutPred

0.82

Gain of MoRF binding (P = 0.0017);

MVP

0.84

MPC

0.45

ClinPred

1.0

GERP RS

4.5

Varity_R

0.96

gMVP

0.97

Mutation Taster

=21/79

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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over