NM_001172.4:c.924G>A

Variant names:

• chr14-67650779-G-A
• rs45584632
• NM_001172.4:c.924G>A

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 0P and 15B. BP4_Moderate BP6_Very_Strong BP7 BS2

The NM_001172.4(ARG2):​c.924G>A​(p.Ala308Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00186 in 1,614,122 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0021 (2 hom., cov: 32)
  • Exomes 𝑓: 0.0018 (5 hom.)
• Consequence: ARG2 NM_001172.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 1.11
• Publications: 3 publications found

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]

VTI1B (HGNC:17793): (vesicle transport through interaction with t-SNAREs 1B) Enables SNARE binding activity and chloride channel inhibitor activity. Involved in regulation of protein localization to plasma membrane. Located in several cellular components, including endosome membrane; lysosomal membrane; and perinuclear region of cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

GPHN (HGNC:15465): (gephyrin) This gene encodes a neuronal assembly protein that anchors inhibitory neurotransmitter receptors to the postsynaptic cytoskeleton via high affinity binding to a receptor subunit domain and tubulin dimers. In nonneuronal tissues, the encoded protein is also required for molybdenum cofactor biosynthesis. Mutations in this gene may be associated with the neurological condition hyperplexia and also lead to molybdenum cofactor deficiency. Numerous alternatively spliced transcript variants encoding different isoforms have been described; however, the full-length nature of all transcript variants is not currently known. [provided by RefSeq, Jul 2008]

GPHN Gene-Disease associations (from GenCC):

• sulfite oxidase deficiency due to molybdenum cofactor deficiency type C

  Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Ambry Genetics
• hereditary hyperekplexia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• complex neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -15 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.35).
• BP6: Variant 14-67650779-G-A is Benign according to our data. Variant chr14-67650779-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 770239.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=1.11 with no splicing effect.
• BS2: High Homozygotes in GnomAd4 at 2 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001172.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARG2	NM_001172.4	MANE Select	c.924G>A	p.Ala308Ala	synonymous	Exon 8 of 8	NP_001163.1	P78540
	VTI1B	NM_006370.3	MANE Select	c.*606C>T		3_prime_UTR	Exon 6 of 6	NP_006361.1	Q9UEU0-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARG2	ENST00000261783.4	TSL:1 MANE Select	c.924G>A	p.Ala308Ala	synonymous	Exon 8 of 8	ENSP00000261783.3	P78540
	VTI1B	ENST00000554659.6	TSL:1 MANE Select	c.*606C>T		3_prime_UTR	Exon 6 of 6	ENSP00000450731.1	Q9UEU0-1
	ARG2	ENST00000927904.1		c.819G>A	p.Ala273Ala	synonymous	Exon 7 of 7	ENSP00000597963.1

Frequencies

GnomAD3 genomes AF: 0.00209 AC: 318 AN: 152134 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.00164

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00511

Gnomad ASJ AF: 0.00432

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00104

Gnomad FIN AF: 0.000282

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.00201

Gnomad OTH AF: 0.00526

GnomAD2 exomes AF: 0.00172 AC: 433 AN: 251384 AF XY: 0.00177

Gnomad AFR exome AF: 0.00148

Gnomad AMR exome AF: 0.00246

Gnomad ASJ exome AF: 0.00585

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.000139

Gnomad NFE exome AF: 0.00200

Gnomad OTH exome AF: 0.00326

GnomAD4 exome AF: 0.00183 AC: 2678 AN: 1461870 Hom.: 5 Cov.: 31 AF XY: 0.00180 AC XY: 1311 AN XY: 727234

African (AFR) AF: 0.00206 AC: 69 AN: 33480

American (AMR) AF: 0.00275 AC: 123 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00551 AC: 144 AN: 26136

East Asian (EAS) AF: 0.0000756 AC: 3 AN: 39698

South Asian (SAS) AF: 0.000464 AC: 40 AN: 86258

European-Finnish (FIN) AF: 0.0000749 AC: 4 AN: 53420

Middle Eastern (MID) AF: 0.00677 AC: 39 AN: 5762

European-Non Finnish (NFE) AF: 0.00188 AC: 2095 AN: 1111996

Other (OTH) AF: 0.00267 AC: 161 AN: 60396

GnomAD4 genome AF: 0.00209 AC: 318 AN: 152252 Hom.: 2 Cov.: 32 AF XY: 0.00171 AC XY: 127 AN XY: 74438

African (AFR) AF: 0.00164 AC: 68 AN: 41552

American (AMR) AF: 0.00510 AC: 78 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.00432 AC: 15 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.00104 AC: 5 AN: 4822

European-Finnish (FIN) AF: 0.000282 AC: 3 AN: 10620

Middle Eastern (MID) AF: 0.00340 AC: 1 AN: 294

European-Non Finnish (NFE) AF: 0.00201 AC: 137 AN: 68002

Other (OTH) AF: 0.00521 AC: 11 AN: 2112

Alfa AF: 0.00234 Hom.: 0

Bravo AF: 0.00228

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.00382

EpiControl AF: 0.00320

ClinVar

ClinVar submissions as Germline

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	3	not provided (3)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.35
CADD	Benign	11
DANN	Benign	0.61
PhyloP100		1.1
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs45584632; hg19: chr14-68117496;