chr18-79986623-T-A

Variant names:

• chr18-79986623-T-A
• rs8086024
• NM_006701.5:c.153+1617A>T

Variant summary

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

The NM_001303471.3(TXNL4A):​c.15A>T​(p.Arg5Ser) variant causes a missense 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. 5/5 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. R5R) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TXNL4A NM_001303471.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.00600
• Publications: 16 publications found

Genes affected

TXNL4A (HGNC:30551): (thioredoxin like 4A) The protein encoded by this gene is a member of the U5 small ribonucleoprotein particle (snRNP), and is involved in pre-mRNA splicing. This protein contains a thioredoxin-like fold and it is expected to interact with multiple proteins. Protein-protein interactions have been observed with the polyglutamine tract-binding protein 1 (PQBP1). Mutations in both the coding region and promoter region of this gene have been associated with Burn-McKeown syndrome, which is a rare disorder characterized by craniofacial dysmorphisms, cardiac defects, hearing loss, and bilateral choanal atresia. A pseudogene of this gene is found on chromosome 2. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2015]

TXNL4A Gene-Disease associations (from GenCC):

• choanal atresia-hearing loss-cardiac defects-craniofacial dysmorphism syndrome

  Inheritance: AR, Unknown Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen, Orphanet

ACMG classification

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=-0.71).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001303471.3. 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
	TXNL4A	NM_006701.5	MANE Select	c.153+1617A>T		intron	N/A	NP_006692.1	P83876
	TXNL4A	NM_001303471.3		c.15A>T	p.Arg5Ser	missense	Exon 2 of 4	NP_001290400.1
	TXNL4A	NM_001305557.2		c.129+1641A>T		intron	N/A	NP_001292486.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TXNL4A	ENST00000269601.10	TSL:1 MANE Select	c.153+1617A>T		intron	N/A	ENSP00000269601.4	P83876
	TXNL4A	ENST00000585474.5	TSL:1	c.-60-8922A>T		intron	N/A	ENSP00000465572.1	K7ESL1
	TXNL4A	ENST00000355491.5	TSL:1	n.153+1617A>T		intron	N/A	ENSP00000347678.4	O14835

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 52

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 8152

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	5.7
DANN	Benign	0.88
PhyloP100		0.0060

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs8086024; hg19: chr18-77746623;