chr9-123034846-C-T

Position:

• chr9-123034846-C-T

Variant summary

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

The NM_005294.3(GPR21):​c.280C>T​(p.Leu94Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GPR21 NM_005294.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.237

Genes affected

GPR21 (HGNC:4476): (G protein-coupled receptor 21) This gene encodes a member of the G-protein-coupled receptor 1 family. G-protein coupled receptors are membrane proteins which activate signaling cascades as a response to extracellular stress. The encoded protein activates a Gq signal transduction pathway which mobilizes calcium. [provided by RefSeq, Nov 2012]

RABGAP1 (HGNC:17155): (RAB GTPase activating protein 1) Enables GTPase activator activity and small GTPase binding activity. Involved in regulation of GTPase activity. Located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

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=0.08504045).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GPR21	NM_005294.3	c.280C>T	p.Leu94Phe	missense_variant	2/2	ENST00000616002.3
RABGAP1	NM_012197.4	c.1794+14387C>T		intron_variant		ENST00000373647.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GPR21	ENST00000616002.3	c.280C>T	p.Leu94Phe	missense_variant	2/2	1	NM_005294.3	P1
RABGAP1	ENST00000373647.9	c.1794+14387C>T		intron_variant		1	NM_012197.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

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

Oct 12, 2021

The c.280C>T (p.L94F) alteration is located in exon 1 (coding exon 1) of the GPR21 gene. This alteration results from a C to T substitution at nucleotide position 280, causing the leucine (L) at amino acid position 94 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	0.089
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	12
DANN	Benign	0.93
Eigen	Benign	-0.35
Eigen_PC	Benign	-0.20
FATHMM_MKL	Benign	0.37	N
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.085	T;T
MetaSVM	Benign	-0.89	T
MutationTaster	Benign	1.0	D;D;N
PrimateAI	Benign	0.33	T
Sift4G	Benign	0.72	T;T
Polyphen		0.29	.;B
Vest4		0.056
MutPred		0.42		Gain of helix (P = 0.0854);Gain of helix (P = 0.0854);
MVP		0.28
MPC		0.35
ClinPred		0.33	T
GERP RS		5.7
Varity_R		0.037
gMVP		0.023

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr9-125797125;