chr6-18121617-C-G

Position:

• chr6-18121617-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_198586.3(NHLRC1):​c.990G>C​(p.Gln330His) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. Q330Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: NHLRC1 NM_198586.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.606

Genes affected

NHLRC1 (HGNC:21576): (NHL repeat containing E3 ubiquitin protein ligase 1) The protein encoded by this gene is a single subunit E3 ubiquitin ligase. Laforin is polyubiquitinated by the encoded protein. Defects in this intronless gene lead to an accumulation of laforin and onset of Lafora disease, also known as progressive myoclonic epilepsy type 2 (EPM2).[provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.39948198).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NHLRC1	NM_198586.3	c.990G>C	p.Gln330His	missense_variant	1/1	ENST00000340650.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NHLRC1	ENST00000340650.6	c.990G>C	p.Gln330His	missense_variant	1/1		NM_198586.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.19	T
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Benign	0.73	D
LIST_S2	Benign	0.72	T
M_CAP	Uncertain	0.090	D
MetaRNN	Benign	0.40	T
MetaSVM	Uncertain	0.27	D
MutationAssessor	Uncertain	2.3	M
MutationTaster	Benign	0.93	D
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-2.2	N
REVEL	Uncertain	0.48
Sift	Uncertain	0.026	D
Sift4G	Uncertain	0.025	D
Polyphen		1.0	D
Vest4		0.23
MutPred		0.42		Loss of solvent accessibility (P = 0.0364);
MVP		0.96
MPC		0.78
ClinPred		0.96	D
GERP RS		3.0
Varity_R		0.14
gMVP		0.33

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		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: rs148553723; hg19: chr6-18121848;