chr6-32084637-G-T

Variant names:

• chr6-32084637-G-T
• rs867358435
• NM_001365276.2:c.3221C>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001365276.2(TNXB):​c.3221C>A​(p.Thr1074Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,447,876 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: TNXB NM_001365276.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.38
• Publications: 1 publications found

Genes affected

TNXB (HGNC:11976): (tenascin XB) This gene encodes a member of the tenascin family of extracellular matrix glycoproteins. The tenascins have anti-adhesive effects, as opposed to fibronectin which is adhesive. This protein is thought to function in matrix maturation during wound healing, and its deficiency has been associated with the connective tissue disorder Ehlers-Danlos syndrome. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. It is one of four genes in this cluster which have been duplicated. The duplicated copy of this gene is incomplete and is a pseudogene which is transcribed but does not encode a protein. The structure of this gene is unusual in that it overlaps the CREBL1 and CYP21A2 genes at its 5' and 3' ends, respectively. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

TNXB Gene-Disease associations (from GenCC):

• Ehlers-Danlos syndrome

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• Ehlers-Danlos syndrome due to tenascin-X deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Illumina, PanelApp Australia, Orphanet
• familial vesicoureteral reflux

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• vesicoureteral reflux 8

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ENSG00000294466 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.35983527).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TNXB	NM_001365276.2	c.3221C>A	p.Thr1074Asn	missense_variant	Exon 8 of 44	ENST00000644971.2	NP_001352205.1
TNXB	NM_001428335.1	c.3962C>A	p.Thr1321Asn	missense_variant	Exon 9 of 45		NP_001415264.1
TNXB	NM_019105.8	c.3221C>A	p.Thr1074Asn	missense_variant	Exon 8 of 44		NP_061978.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TNXB	ENST00000644971.2	c.3221C>A	p.Thr1074Asn	missense_variant	Exon 8 of 44		NM_001365276.2	ENSP00000496448.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1447876 Hom.: 0 Cov.: 31 AF XY: 0.00000278 AC XY: 2 AN XY: 718554

African (AFR) AF: 0.0000899 AC: 3 AN: 33354

American (AMR) AF: 0.00 AC: 0 AN: 44380

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25932

East Asian (EAS) AF: 0.00 AC: 0 AN: 39494

South Asian (SAS) AF: 0.00 AC: 0 AN: 84352

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49346

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5736

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1105442

Other (OTH) AF: 0.00 AC: 0 AN: 59840

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Jan 02, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.068	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.34	T;.;T;.
Eigen	Benign	0.18
Eigen_PC	Benign	-0.028
FATHMM_MKL	Benign	0.16	N
LIST_S2	Benign	0.61	.;T;T;D
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.36	T;T;T;T
MetaSVM	Benign	-0.77	T
PhyloP100		1.4
PrimateAI	Benign	0.37	T
PROVEAN	Uncertain	-3.4	.;.;D;.
REVEL	Benign	0.25
Sift	Uncertain	0.0070	.;.;D;.
Sift4G	Uncertain	0.012	.;.;D;D
Vest4		0.40
MutPred		0.60		Loss of phosphorylation at T1074 (P = 0.0159);.;Loss of phosphorylation at T1074 (P = 0.0159);.;
MVP		0.44
ClinPred		0.91	D
GERP RS		4.1
Varity_R		0.42
Mutation Taster		=94/6	polymorphism

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: rs867358435; hg19: chr6-32052414;