chr4-3019654-A-T

Position:

• chr4-3019654-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_182982.3(GRK4):​c.755A>T​(p.Tyr252Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GRK4 NM_182982.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.10

Genes affected

GRK4 (HGNC:4543): (G protein-coupled receptor kinase 4) 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 the activated forms of G protein-coupled receptors thus initiating its deactivation. This gene has been linked to both genetic and acquired hypertension. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.887

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GRK4	NM_182982.3	c.755A>T	p.Tyr252Phe	missense_variant	9/16	ENST00000398052.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GRK4	ENST00000398052.9	c.755A>T	p.Tyr252Phe	missense_variant	9/16	1	NM_182982.3	P1
GRK4	ENST00000345167.10	c.659A>T	p.Tyr220Phe	missense_variant	8/15	1
GRK4	ENST00000504933.1	c.755A>T	p.Tyr252Phe	missense_variant	9/15	1
GRK4	ENST00000398051.8	c.659A>T	p.Tyr220Phe	missense_variant	8/14	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 07, 2024

The c.755A>T (p.Y252F) alteration is located in exon 9 (coding exon 9) of the GRK4 gene. This alteration results from a A to T substitution at nucleotide position 755, causing the tyrosine (Y) at amino acid position 252 to be replaced by a phenylalanine (F). 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	Benign	0.28
BayesDel_addAF	Uncertain	0.042	T
BayesDel_noAF	Benign	-0.18
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.35	.;T;.;.
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	1.0	D;D;D;D
M_CAP	Benign	0.0088	T
MetaRNN	Pathogenic	0.89	D;D;D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	.;L;.;L
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-3.8	D;D;D;D
REVEL	Uncertain	0.44
Sift	Uncertain	0.0030	D;D;D;D
Sift4G	Uncertain	0.0020	D;D;D;D
Polyphen		1.0	D;D;D;D
Vest4		0.70
MutPred		0.77		.;Loss of methylation at K257 (P = 0.1453);.;Loss of methylation at K257 (P = 0.1453);
MVP		0.50
MPC		0.37
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.65
gMVP		0.54

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-3021381;