20-43726378-A-C

Variant names:

• chr20-43726378-A-C
• rs761113372
• NM_176791.4:c.317T>G

Variant summary

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

The NM_176791.4(GTSF1L):​c.317T>G​(p.Val106Gly) 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 1,461,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V106A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: GTSF1L NM_176791.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.86
• Publications: 0 publications found

Genes affected

GTSF1L (HGNC:16198): (gametocyte specific factor 1 like) Predicted to enable metal ion binding activity. [provided by Alliance of Genome Resources, Apr 2022]

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=0.42070767).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_176791.4. 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
	GTSF1L	NM_176791.4	MANE Select	c.317T>G	p.Val106Gly	missense	Exon 1 of 1	NP_789761.1	Q9H1H1-1
	GTSF1L	NM_001008901.2		c.279+38T>G		intron	N/A	NP_001008901.1	Q9H1H1-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GTSF1L	ENST00000373003.2	TSL:6 MANE Select	c.317T>G	p.Val106Gly	missense	Exon 1 of 1	ENSP00000362094.1	Q9H1H1-1
	GTSF1L	ENST00000373005.2	TSL:3	c.279+38T>G		intron	N/A	ENSP00000362096.2	Q9H1H1-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461890 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727246

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112010

Other (OTH) AF: 0.00 AC: 0 AN: 60396

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.076	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.019	T
Eigen	Benign	-0.084
Eigen_PC	Benign	-0.23
FATHMM_MKL	Benign	0.16	N
LIST_S2	Benign	0.25	T
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.42	T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	1.6	L
PhyloP100		1.9
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.26
Sift	Uncertain	0.0020	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.39
MutPred		0.66		Loss of stability (P = 0.0037)
MVP		0.34
MPC		0.13
ClinPred		0.68	D
GERP RS		2.9
PromoterAI		-0.014	Neutral
Varity_R		0.18
gMVP		0.24
Mutation Taster		=90/10	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: rs761113372; hg19: chr20-42355018;