2-157258576-C-T

Variant summary

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

The NM_014568.3(GALNT5):c.494C>T(p.Ala165Val) 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. 16/21 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)
• Consequence: GALNT5 NM_014568.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.118

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=0.047986597).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GALNT5	NM_014568.3	c.494C>T	p.Ala165Val	missense_variant	1/10	ENST00000259056.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GALNT5	ENST00000259056.5	c.494C>T	p.Ala165Val	missense_variant	1/10	1	NM_014568.3	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

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 01, 2023

The c.494C>T (p.A165V) alteration is located in exon 1 (coding exon 1) of the GALNT5 gene. This alteration results from a C to T substitution at nucleotide position 494, causing the alanine (A) at amino acid position 165 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	0.078
BayesDel_addAF	Benign	-0.32	T
BayesDel_noAF	Benign	-0.70
Cadd	Benign	4.0
Dann	Benign	0.76
DEOGEN2	Benign	0.0021	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.077	N
LIST_S2	Benign	0.47	T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.048	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.2	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.18	T
PROVEAN	Benign	-0.090	N
REVEL	Benign	0.032
Sift	Benign	0.75	T
Sift4G	Benign	0.76	T
Polyphen		0.0010	B
Vest4		0.038
MutPred		0.13		Gain of loop (P = 0.0097);
MVP		0.43
MPC		0.11
ClinPred		0.045	T
GERP RS		0.56
Varity_R		0.022
gMVP		0.22

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-158115088;