chr2-43676172-T-G

Position:

• chr2-43676172-T-G

Variant summary

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

The NM_001101330.3(C1GALT1C1L):​c.151A>C​(p.Asn51His) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,461,708 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 8/12 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)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: C1GALT1C1L NM_001101330.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.92

Genes affected

C1GALT1C1L (HGNC:51617): (C1GALT1 specific chaperone 1 like) Predicted to enable glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase activity. Predicted to be involved in O-glycan processing, core 1. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

PLEKHH2 (HGNC:30506): (pleckstrin homology, MyTH4 and FERM domain containing H2) Predicted to enable actin binding activity. Predicted to be involved in negative regulation of actin filament depolymerization. Located in several cellular components, including cytosol; lamellipodium; and nuclear body. [provided by Alliance of Genome Resources, Apr 2022]

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=0.15742177).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
C1GALT1C1L	NM_001101330.3	c.151A>C	p.Asn51His	missense_variant	1/1	ENST00000475092.4
PLEKHH2	NM_172069.4	c.124-2691T>G		intron_variant		ENST00000282406.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
C1GALT1C1L	ENST00000475092.4	c.151A>C	p.Asn51His	missense_variant	1/1		NM_001101330.3	P1
PLEKHH2	ENST00000282406.9	c.124-2691T>G		intron_variant		1	NM_172069.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461708 Hom.: 0 Cov.: 60 AF XY: 0.00000138 AC XY: 1 AN XY: 727136

Gnomad4 AFR exome AF: 0.00

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000151

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

May 30, 2023

The c.151A>C (p.N51H) alteration is located in exon 1 (coding exon 1) of the C1GALT1C1L gene. This alteration results from a A to C substitution at nucleotide position 151, causing the asparagine (N) at amino acid position 51 to be replaced by a histidine (H). 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	0.083
BayesDel_noAF	Benign	-0.77
CADD	Benign	15
DANN	Benign	0.76
DEOGEN2	Benign	0.0062	T
FATHMM_MKL	Benign	0.52	D
LIST_S2	Benign	0.29	T
MetaRNN	Benign	0.16	T
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.22	T
Sift4G	Uncertain	0.025	D
Vest4		0.14
GERP RS		-0.43
Varity_R		0.041
gMVP		0.30

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

LitVar

Other links and lift over

dbSNP: rs993335485; hg19: chr2-43903311;