chr16-72089002-A-T

Position:

• chr16-72089002-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_017853.3(TXNL4B):​c.269T>A​(p.Met90Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000343 in 1,457,638 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 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. M90V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: TXNL4B NM_017853.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.03

Genes affected

TXNL4B (HGNC:26041): (thioredoxin like 4B) Predicted to be involved in mRNA splicing, via spliceosome. Located in cytosol and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.912

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TXNL4B	NM_017853.3	c.269T>A	p.Met90Lys	missense_variant	3/4	ENST00000268483.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TXNL4B	ENST00000268483.8	c.269T>A	p.Met90Lys	missense_variant	3/4	1	NM_017853.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000343 AC: 5 AN: 1457638 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 724640

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000451

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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 21, 2023

The c.269T>A (p.M90K) alteration is located in exon 3 (coding exon 2) of the TXNL4B gene. This alteration results from a T to A substitution at nucleotide position 269, causing the methionine (M) at amino acid position 90 to be replaced by a lysine (K). 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	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.48
CADD	Pathogenic	27
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.52	.;D;D;D;T
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D;.;D;.;D
M_CAP	Benign	0.046	D
MetaRNN	Pathogenic	0.91	D;D;D;D;D
MetaSVM	Uncertain	-0.048	T
MutationAssessor	Pathogenic	3.1	.;M;M;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-5.3	D;D;D;D;D
REVEL	Pathogenic	0.70
Sift	Uncertain	0.0010	D;D;D;D;D
Sift4G	Pathogenic	0.0010	.;D;D;D;.
Polyphen		1.0	.;D;D;D;.
Vest4		0.98
MutPred		0.76		Gain of disorder (P = 0.0129);Gain of disorder (P = 0.0129);Gain of disorder (P = 0.0129);Gain of disorder (P = 0.0129);Gain of disorder (P = 0.0129);
MVP		0.25
MPC		0.015
ClinPred		1.0	D
GERP RS		4.7
Varity_R		0.97
gMVP		0.90

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-72122901;