chr16-46922414-C-G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_133443.4(GPT2):c.1210C>G(p.Arg404Gly) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000311 in 1,607,772 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/24 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R404L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000033 ( 0 hom. )

Consequence

GPT2
NM_133443.4 missense, splice_region

Scores

Splicing: ADA: 0.001668

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.22

Publications

1 publications found

Variant links:

Genes affected

GPT2 (HGNC:18062): (glutamic--pyruvic transaminase 2) This gene encodes a mitochondrial alanine transaminase, a pyridoxal enzyme that catalyzes the reversible transamination between alanine and 2-oxoglutarate to generate pyruvate and glutamate. Alanine transaminases play roles in gluconeogenesis and amino acid metabolism in many tissues including skeletal muscle, kidney, and liver. Activating transcription factor 4 upregulates this gene under metabolic stress conditions in hepatocyte cell lines. A loss of function mutation in this gene has been associated with developmental encephalopathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]

GPT2 Gene-Disease associations (from GenCC):

glutamate pyruvate transaminase 2 deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: ClinGen, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics

GPT2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.19440031).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GPT2	NM_133443.4 link	c.1210C>G	p.Arg404Gly	missense_variant, splice_region_variant	Exon 9 of 12	ENST00000340124.9	NP_597700.1	Q8TD30-1A0A024R6R2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
GPT2	ENST00000340124.9 link	c.1210C>G	p.Arg404Gly	missense_variant, splice_region_variant	Exon 9 of 12	1	NM_133443.4	ENSP00000345282.4	Q8TD30-1
GPT2	ENST00000440783.2 link	c.910C>G	p.Arg304Gly	missense_variant, splice_region_variant	Exon 9 of 12	2		ENSP00000413804.2	Q8TD30-2
GPT2	ENST00000562801.5 link	n.1720C>G		splice_region_variant, non_coding_transcript_exon_variant	Exon 3 of 6	2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000203

AC:

AN:

246148

AF XY:

0.0000375

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000446

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000330

AC:

AN:

1455508

Hom.:

Cov.:

AF XY:

0.0000345

AC XY:

AN XY:

723690

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33304

American (AMR)

AF:

0.0000229

AC:

AN:

43696

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25932

East Asian (EAS)

AF:

0.00

AC:

AN:

39554

South Asian (SAS)

AF:

0.00

AC:

AN:

85868

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52212

Middle Eastern (MID)

AF:

0.000349

AC:

AN:

5724

European-Non Finnish (NFE)

AF:

0.0000397

AC:

AN:

1109100

Other (OTH)

AF:

0.0000166

AC:

AN:

60118

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

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

AF:

0.0000131

AC:

AN:

152264

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74446

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41564

American (AMR)

AF:

0.00

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68002

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000284

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jan 18, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1210C>G (p.R404G) alteration is located in exon 9 (coding exon 8) of the GPT2 gene. This alteration results from a C to G substitution at nucleotide position 1210, causing the arginine (R) at amino acid position 404 to be replaced by a glycine (G). 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

0.091

BayesDel_addAF

Benign

-0.066

BayesDel_noAF

Benign

-0.22

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Uncertain

0.74

D;.

Eigen

Benign

-0.79

Eigen_PC

Benign

-0.71

FATHMM_MKL

Uncertain

0.81

LIST_S2

Benign

0.65

T;T

M_CAP

Uncertain

0.25

MetaRNN

Benign

0.19

T;T

MetaSVM

Uncertain

-0.24

MutationAssessor

Benign

1.9

L;.

PhyloP100

2.2

PrimateAI

Benign

0.34

PROVEAN

Uncertain

-3.0

D;D

REVEL

Benign

0.13

Sift

Benign

0.033

D;D

Sift4G

Uncertain

0.049

D;T

Polyphen

0.0010

B;.

Vest4

0.34

MVP

0.82

MPC

0.56

ClinPred

0.22

GERP RS

1.4

Varity_R

0.45

gMVP

0.57

Mutation Taster

=76/24

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0017

dbscSNV1_RF

Benign

0.060

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over