chr12-120446542-C-T

Variant names:

• chr12-120446542-C-T
• rs1877869585
• NM_176818.3:c.62C>T

Variant summary

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

The NM_176818.3(GATC):​c.62C>T​(p.Thr21Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,449,040 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: GATC NM_176818.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.937

Genes affected

GATC (HGNC:25068): (glutamyl-tRNA amidotransferase subunit C) Enables glutaminyl-tRNA synthase (glutamine-hydrolyzing) activity. Involved in glutaminyl-tRNAGln biosynthesis via transamidation and mitochondrial translation. Located in mitochondrion. Part of glutamyl-tRNA(Gln) amidotransferase complex. Implicated in combined oxidative phosphorylation deficiency 42. [provided by Alliance of Genome Resources, Apr 2022]

ENSG00000111780 (HGNC:):

TRIAP1 (HGNC:26937): (TP53 regulated inhibitor of apoptosis 1) Enables p53 binding activity. Contributes to phosphatidic acid transfer activity. Involved in several processes, including DNA damage response, signal transduction by p53 class mediator; negative regulation of apoptotic process; and positive regulation of phospholipid transport. Located in mitochondrial intermembrane space and nucleoplasm. Part of protein-containing complex. [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=0.08063334).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GATC	NM_176818.3	c.62C>T	p.Thr21Ile	missense_variant	Exon 1 of 4	ENST00000551765.6	NP_789788.1
GATC	NR_033684.2	n.99C>T		non_coding_transcript_exon_variant	Exon 1 of 5
TRIAP1	NM_016399.3	c.-170G>A		upstream_gene_variant		ENST00000546954.2	NP_057483.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GATC	ENST00000551765.6	c.62C>T	p.Thr21Ile	missense_variant	Exon 1 of 4	1	NM_176818.3	ENSP00000446872.1
ENSG00000111780	ENST00000551806.1	c.175-115C>T		intron_variant	Intron 2 of 4	3		ENSP00000450281.1
TRIAP1	ENST00000546954.2	c.-170G>A		upstream_gene_variant		1	NM_016399.3	ENSP00000449795.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1449040 Hom.: 0 Cov.: 33 AF XY: 0.00000417 AC XY: 3 AN XY: 719838

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000117

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.04e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.62C>T (p.T21I) alteration is located in exon 1 (coding exon 1) of the GATC gene. This alteration results from a C to T substitution at nucleotide position 62, causing the threonine (T) at amino acid position 21 to be replaced by an isoleucine (I). 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	0.11
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	17
DANN	Benign	0.96
DEOGEN2	Benign	0.030	T
Eigen	Benign	-0.74
Eigen_PC	Benign	-0.81
FATHMM_MKL	Benign	0.0080	N
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.081	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-0.76	N
REVEL	Benign	0.028
Sift	Benign	0.030	D
Sift4G	Uncertain	0.014	D
Polyphen		0.43	B
Vest4		0.073
MutPred		0.26		Loss of disorder (P = 0.0304);
MVP		0.20
MPC		0.77
ClinPred		0.14	T
GERP RS		2.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.054
gMVP		0.47

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

LitVar

Other links and lift over

dbSNP: rs1877869585; hg19: chr12-120884345;