9-135639142-G-C

Variant summary

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

The NM_182974.3(GLT6D1):c.46C>G(p.Leu16Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000659 in 151,784 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: GLT6D1 NM_182974.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.200

Genes affected

GLT6D1 (HGNC:23671): (glycosyltransferase 6 domain containing 1) The GT6 glycosyltransferases gene family, which includes the ABO blood group (ABO; MIM 110300) and GLT6D1, shows a complex evolution pattern, with multiple events of gain and loss in different mammal species. In humans, the ABO gene is considered the sole functional member, although the O allele is null and is fixed in certain populations (summary by Casals et al. (2009) [PubMed 19218399]).[supplied by OMIM, Jan 2011]

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=0.2486167).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GLT6D1	NM_182974.3	c.46C>G	p.Leu16Val	missense_variant	2/5	ENST00000371763.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GLT6D1	ENST00000371763.6	c.46C>G	p.Leu16Val	missense_variant	2/5	1	NM_182974.3	P1

Frequencies

GnomAD3 genomes AF: 0.00000659 AC: 1 AN: 151784 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000243

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 25

GnomAD4 genome AF: 0.00000659 AC: 1 AN: 151784 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74170

Gnomad4 AFR AF: 0.0000243

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

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

Dec 14, 2021

The c.46C>G (p.L16V) alteration is located in exon 2 (coding exon 1) of the GLT6D1 gene. This alteration results from a C to G substitution at nucleotide position 46, causing the leucine (L) at amino acid position 16 to be replaced by a valine (V). 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	0.090
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
Cadd	Benign	6.8
Dann	Benign	0.88
DEOGEN2	Benign	0.0051	T;.
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.70
FATHMM_MKL	Benign	0.024	N
LIST_S2	Benign	0.41	T;T
M_CAP	Benign	0.0013	T
MetaRNN	Benign	0.25	T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Uncertain	2.1	M;.
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-0.25	N;.
REVEL	Benign	0.092
Sift	Benign	0.044	D;.
Sift4G	Benign	0.14	T;T
Polyphen		0.98	D;.
Vest4		0.34
MutPred		0.60		Gain of sheet (P = 0.0036);Gain of sheet (P = 0.0036);
MVP		0.10
MPC		0.017
ClinPred		0.15	T
GERP RS		0.42
Varity_R		0.052
gMVP		0.32

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs1317716842; hg19: chr9-138530988;