Genetic Variant TXNDC5:c.820-7T>A (chr6-7888855-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_030810.5(TXNDC5):c.820-7T>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TXNDC5
NM_030810.5 splice_region, intron

Scores

Splicing: ADA: 0.6424

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.506

Publications

15 publications found

Variant links:

Genes affected

TXNDC5 (HGNC:21073): (thioredoxin domain containing 5) This gene encodes a member of the disulfide isomerase (PDI) family of endoplasmic reticulum (ER) proteins that catalyze protein folding and thiol-disulfide interchange reactions. The encoded protein has an N-terminal endoplasmic reticulum (ER)-signal sequence, three catalytically active thioredoxin domains and a C-terminal ER-retention sequence. Its expression is induced by hypoxia and its role may be to protect hypoxic cells from apoptosis. Alternative splicing results in multiple transcript variants. Read-through transcription also exists between this gene and the neighboring upstream BLOC1S5 gene. [provided by RefSeq, Dec 2016]

TXNDC5 links:

BLOC1S5-TXNDC5 (HGNC:42001): (BLOC1S5-TXNDC5 readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring MUTED (muted homolog) and TXNDC5 (thioredoxin domain containing 5) genes on chromosome 6. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD) and is unlikely to produce a protein product. [provided by RefSeq, Dec 2010]

BLOC1S5-TXNDC5 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.93).

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
TXNDC5	NM_030810.5 link	c.820-7T>A	splice_region_variant, intron_variant	Intron 6 of 9	ENST00000379757.9	NP_110437.2	Q8NBS9-1
TXNDC5	NM_001145549.4 link	c.496-7T>A	splice_region_variant, intron_variant	Intron 6 of 9		NP_001139021.1	Q8NBS9-2A0A024QZV0
BLOC1S5-TXNDC5	NR_037616.1 link	n.979-7T>A	splice_region_variant, intron_variant	Intron 9 of 12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TXNDC5	ENST00000379757.9 link	c.820-7T>A		splice_region_variant, intron_variant	Intron 6 of 9	1	NM_030810.5	ENSP00000369081.4		Q8NBS9-1
BLOC1S5-TXNDC5	ENST00000439343.2 link	n.*518-7T>A		splice_region_variant, intron_variant	Intron 9 of 12	2		ENSP00000454697.1		H3BN57

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

1448332

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

719404

African (AFR)

AF:

0.00

AC:

AN:

32848

American (AMR)

AF:

0.00

AC:

AN:

42934

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25476

East Asian (EAS)

AF:

0.00

AC:

AN:

39062

South Asian (SAS)

AF:

0.00

AC:

AN:

84186

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53164

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5724

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1105162

Other (OTH)

AF:

0.00

AC:

AN:

59776

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.93

CADD

Benign

(source)

DANN

Benign

0.43

PhyloP100

-0.51

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.64

dbscSNV1_RF

Benign

0.68

SpliceAI score (max)

0.98

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.98

Position offset: -2

DS_AL_spliceai

0.30

Position offset: -7

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over