11-2302889-G-T

Variant summary

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

The NM_139022.3(TSPAN32):c.112G>T(p.Gly38Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,356 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 (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: TSPAN32 NM_139022.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.78

Genes affected

TSPAN32 (HGNC:13410): (tetraspanin 32) This gene, which is a member of the tetraspanin superfamily, is one of several tumor-suppressing subtransferable fragments located in the imprinted gene domain of chromosome 11p15.5, an important tumor-suppressor gene region. Alterations in this region have been associated with Beckwith-Wiedemann syndrome, Wilms tumor, rhabdomyosarcoma, adrenocortical carcinoma, and lung, ovarian and breast cancers. This gene is located among several imprinted genes; however, this gene, as well as the tumor-suppressing subchromosomal transferable fragment 4, escapes imprinting. This gene may play a role in malignancies and diseases that involve this region, and it is also involved in hematopoietic cell function. Alternatively spliced transcript variants have been described, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]

C11orf21 (HGNC:13231): (chromosome 11 open reading frame 21) Predicted to be located in cytoplasm. [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, 0.894

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TSPAN32	NM_139022.3	c.112G>T	p.Gly38Trp	missense_variant	2/10	ENST00000182290.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TSPAN32	ENST00000182290.9	c.112G>T	p.Gly38Trp	missense_variant	2/10	1	NM_139022.3	P2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461356 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726960

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000508 Hom.: 0

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

Jun 23, 2023

The c.112G>T (p.G38W) alteration is located in exon 2 (coding exon 2) of the TSPAN32 gene. This alteration results from a G to T substitution at nucleotide position 112, causing the glycine (G) at amino acid position 38 to be replaced by a tryptophan (W). 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	0.67
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
Cadd	Uncertain	23
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.73	D;T;.;.;T
Eigen	Uncertain	0.25
Eigen_PC	Benign	0.088
FATHMM_MKL	Benign	0.52	D
LIST_S2	Benign	0.82	T;T;T;T;.
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.89	D;D;D;D;D
MetaSVM	Uncertain	-0.12	T
MutationAssessor	Benign	1.8	L;.;L;.;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.36	T
PROVEAN	Uncertain	-4.3	D;.;D;D;D
REVEL	Uncertain	0.35
Sift	Uncertain	0.0010	D;.;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D
Polyphen		1.0	D;D;D;.;D
Vest4		0.53
MutPred		0.76		Gain of helix (P = 0.0143);.;Gain of helix (P = 0.0143);.;.;
MVP		0.81
MPC		0.29
ClinPred		0.98	D
GERP RS		3.2
Varity_R		0.40
gMVP		0.44

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1329881334; hg19: chr11-2324119;