2-157258383-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_014568.3(GALNT5):c.301G>C(p.Val101Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,459,730 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: GALNT5 NM_014568.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.81

Genes affected

GALNT5 (HGNC:4127): (polypeptide N-acetylgalactosaminyltransferase 5) The protein encoded by this gene is a membrane-bound polypeptide N-acetylgalactosaminyltransferase that is found in the Golgi. The encoded protein catalyzes the first step in the mucin-type O-glycosylation of Golgi proteins, transfering an N-acetyl-D-galactosamine residue to a serine or threonine residue on the protein receptor. [provided by RefSeq, Aug 2016]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0644542).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GALNT5	NM_014568.3	c.301G>C	p.Val101Leu	missense_variant	1/10	ENST00000259056.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GALNT5	ENST00000259056.5	c.301G>C	p.Val101Leu	missense_variant	1/10	1	NM_014568.3	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1459730 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 726152

Gnomad4 AFR exome AF: 0.0000899

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.: 31

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000756

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 26, 2023

The c.301G>C (p.V101L) alteration is located in exon 1 (coding exon 1) of the GALNT5 gene. This alteration results from a G to C substitution at nucleotide position 301, causing the valine (V) at amino acid position 101 to be replaced by a leucine (L). 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	0.12
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
Cadd	Benign	12
Dann	Uncertain	0.98
DEOGEN2	Benign	0.0089	T
Eigen	Benign	-0.55
Eigen_PC	Benign	-0.49
FATHMM_MKL	Benign	0.38	N
LIST_S2	Benign	0.55	T
M_CAP	Benign	0.0081	T
MetaRNN	Benign	0.064	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	1.9	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-0.43	N
REVEL	Benign	0.073
Sift	Benign	0.11	T
Sift4G	Benign	0.32	T
Polyphen		0.027	B
Vest4		0.077
MutPred		0.27		Loss of sheet (P = 0.0025);
MVP		0.48
MPC		0.11
ClinPred		0.20	T
GERP RS		3.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.079
gMVP		0.17

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

Publications

LitVar

Other links and lift over

dbSNP: rs1392054783; hg19: chr2-158114895;