chr14-67642305-G-A

Position:

• chr14-67642305-G-A

Variant summary

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

The NM_001172.4(ARG2):​c.304G>A​(p.Val102Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 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: ARG2 NM_001172.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.64

Genes affected

ARG2 (HGNC:664): (arginase 2) Arginase catalyzes the hydrolysis of arginine to ornithine and urea. At least two isoforms of mammalian arginase exists (types I and II) which differ in their tissue distribution, subcellular localization, immunologic crossreactivity and physiologic function. The type II isoform encoded by this gene, is located in the mitochondria and expressed in extra-hepatic tissues, especially kidney. The physiologic role of this isoform is poorly understood; it is thought to play a role in nitric oxide and polyamine metabolism. Transcript variants of the type II gene resulting from the use of alternative polyadenylation sites have been described. [provided by RefSeq, Jul 2008]

GPHN (HGNC:):

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=0.25804096).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ARG2	NM_001172.4	c.304G>A	p.Val102Met	missense_variant	3/8	ENST00000261783.4
GPHN	XM_047430879.1	c.1313-92890G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ARG2	ENST00000261783.4	c.304G>A	p.Val102Met	missense_variant	3/8	1	NM_001172.4	P1
ARG2	ENST00000556491.1	n.302G>A		non_coding_transcript_exon_variant	3/4	5
ARG2	ENST00000557120.5	n.346G>A		non_coding_transcript_exon_variant	3/5	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

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

Jul 25, 2023

The c.304G>A (p.V102M) alteration is located in exon 3 (coding exon 3) of the ARG2 gene. This alteration results from a G to A substitution at nucleotide position 304, causing the valine (V) at amino acid position 102 to be replaced by a methionine (M). 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	0.13
BayesDel_addAF	Benign	-0.0060	T
BayesDel_noAF	Benign	-0.25
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.42	T
Eigen	Benign	0.084
Eigen_PC	Uncertain	0.24
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.035	D
MetaRNN	Benign	0.26	T
MetaSVM	Uncertain	-0.20	T
MutationAssessor	Benign	1.3	L
MutationTaster	Benign	0.98	D
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-0.88	N
REVEL	Uncertain	0.29
Sift	Benign	0.087	T
Sift4G	Benign	0.072	T
Polyphen		0.13	B
Vest4		0.19
MVP		0.55
MPC		0.29
ClinPred		0.80	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.44
gMVP		0.58

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

LitVar

Other links and lift over

dbSNP: rs374495866; hg19: chr14-68109022;