6-116279236-C-T

Variant names:

• chr6-116279236-C-T
• NM_003309.4:c.595G>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003309.4(TSPYL1):​c.595G>A​(p.Gly199Ser) 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. 14/21 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)
• Consequence: TSPYL1 NM_003309.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.28

Genes affected

TSPYL1 (HGNC:12382): (TSPY like 1) The protein encoded by this gene is found in the nucleolus and is similar to that of a family of genes on the Y-chromosome. This gene is intronless. Defects in this gene are a cause of sudden infant death with dysgenesis of the testes syndrome (SIDDT). [provided by RefSeq, Dec 2009]

DSE (HGNC:21144): (dermatan sulfate epimerase) The protein encoded by this gene is a tumor-rejection antigen. It is localized to the endoplasmic reticulum and functions to convert D-glucuronic acid to L-iduronic acid during the biosynthesis of dermatan sulfate. This antigen possesses tumor epitopes capable of inducing HLA-A24-restricted and tumor-specific cytotoxic T lymphocytes in cancer patients and may be useful for specific immunotherapy. Mutations in this gene cause inmusculocontractural Ehlers-Danlos syndrome. Alternative splicing results in multiple transcript variants. A related pseudogene has been identified on chromosome 9, and a paralogous gene exists on chromosome 18. [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.079736054).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSPYL1	NM_003309.4	c.595G>A	p.Gly199Ser	missense_variant	Exon 1 of 1	ENST00000368608.4	NP_003300.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TSPYL1	ENST00000368608.4	c.595G>A	p.Gly199Ser	missense_variant	Exon 1 of 1	6	NM_003309.4	ENSP00000357597.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Mar 07, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.595G>A (p.G199S) alteration is located in exon 1 (coding exon 1) of the TSPYL1 gene. This alteration results from a G to A substitution at nucleotide position 595, causing the glycine (G) at amino acid position 199 to be replaced by a serine (S). 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	Benign	0.10
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.048	T
Eigen	Benign	-0.90
Eigen_PC	Benign	-0.91
FATHMM_MKL	Benign	0.17	N
LIST_S2	Benign	0.47	T
M_CAP	Benign	0.0056	T
MetaRNN	Benign	0.080	T
MetaSVM	Benign	-0.94	T
MutationAssessor	Benign	0.0	N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.051
Sift	Benign	0.060	T
Sift4G	Benign	0.13	T
Polyphen		0.36	B
Vest4		0.15
MutPred		0.28		Gain of phosphorylation at G199 (P = 0.0021);
MVP		0.28
MPC		0.62
ClinPred		0.096	T
GERP RS		0.79
Varity_R		0.057
gMVP		0.19

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-116600399;