NM_182916.3:c.-47C>T

Variant names:

• chr3-3126971-C-T
• rs1057523189
• NM_182916.3:c.-47C>T

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_182916.3(TRNT1):​c.-47C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000197 in 152,254 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TRNT1 NM_182916.3 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.786
• Publications: 1 publications found

Genes affected

TRNT1 (HGNC:17341): (tRNA nucleotidyl transferase 1) The protein encoded by this gene is a CCA-adding enzyme which belongs to the tRNA nucleotidyltransferase/poly(A) polymerase family. This essential enzyme functions by catalyzing the addition of the conserved nucleotide triplet CCA to the 3' terminus of tRNA molecules. Mutations in this gene result in sideroblastic anemia with B-cell immunodeficiency, periodic fevers, and developmental delay. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]

TRNT1 Gene-Disease associations (from GenCC):

• congenital sideroblastic anemia-B-cell immunodeficiency-periodic fever-developmental delay syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)
• retinitis pigmentosa and erythrocytic microcytosis

  Inheritance: AR Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)

LOC124909339 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 3-3126971-C-T is Benign according to our data. Variant chr3-3126971-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 388658.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_182916.3. 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
	TRNT1	NM_182916.3	MANE Select	c.-47C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 8	NP_886552.3	Q96Q11-1
	TRNT1	NM_182916.3	MANE Select	c.-47C>T		5_prime_UTR	Exon 1 of 8	NP_886552.3	Q96Q11-1
	TRNT1	NM_001367321.1		c.-47C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 9	NP_001354250.1	Q96Q11-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRNT1	ENST00000251607.11	TSL:1 MANE Select	c.-47C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 8	ENSP00000251607.6	Q96Q11-1
	TRNT1	ENST00000280591.10	TSL:1	c.-47C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 8	ENSP00000280591.6	Q96Q11-2
	TRNT1	ENST00000339437.11	TSL:1	c.-47C>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 3	ENSP00000342985.6	Q96Q11-3

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152254 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

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

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 734 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 554

African (AFR) AF: 0.00 AC: 0 AN: 14

American (AMR) AF: 0.00 AC: 0 AN: 8

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 8

East Asian (EAS) AF: 0.00 AC: 0 AN: 34

South Asian (SAS) AF: 0.00 AC: 0 AN: 4

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 4

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 8

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 622

Other (OTH) AF: 0.00 AC: 0 AN: 32

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152254 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74386

African (AFR) AF: 0.00 AC: 0 AN: 41468

American (AMR) AF: 0.0000654 AC: 1 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4838

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68046

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	12
DANN	Benign	0.87
PhyloP100		0.79
PromoterAI		-0.13	Neutral

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: rs1057523189; hg19: chr3-3168655;