NM_030810.5:c.773_774insC

Variant names:

• chr6-7889540-C-CG
• rs34228534
• NM_030810.5:c.773_774insC

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_030810.5(TXNDC5):​c.773_774insC​(p.Gln258HisfsTer59) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TXNDC5 NM_030810.5 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.44
• Publications: 1 publications found

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]

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_030810.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TXNDC5	NM_030810.5	MANE Select	c.773_774insC	p.Gln258HisfsTer59	frameshift	Exon 6 of 10	NP_110437.2
	TXNDC5	NM_001145549.4		c.449_450insC	p.Gln150HisfsTer59	frameshift	Exon 6 of 10	NP_001139021.1
	BLOC1S5-TXNDC5	NR_037616.1		n.932_933insC		non_coding_transcript_exon	Exon 9 of 13

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TXNDC5	ENST00000379757.9	TSL:1 MANE Select	c.773_774insC	p.Gln258HisfsTer59	frameshift	Exon 6 of 10	ENSP00000369081.4
	TXNDC5	ENST00000473453.2	TSL:1	c.449_450insC	p.Gln150HisfsTer59	frameshift	Exon 6 of 10	ENSP00000420784.1
	BLOC1S5-TXNDC5	ENST00000439343.2	TSL:2	n.*471_*472insC		non_coding_transcript_exon	Exon 9 of 13	ENSP00000454697.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		4.4

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: rs34228534; hg19: chr6-7889773;