16-138151-T-G

Variant names:

• chr16-138151-T-G
• rs764156867
• NM_001077350.3:c.117A>C

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_001077350.3(NPRL3):​c.117A>C​(p.Thr39Thr) variant causes a splice region, synonymous 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. 1/1 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T39T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 30)
• Consequence: NPRL3 NM_001077350.3 splice_region, synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.412
• Publications: 0 publications found

Genes affected

NPRL3 (HGNC:14124): (NPR3 like, GATOR1 complex subunit) Contributes to GTPase activator activity. Involved in cellular response to amino acid starvation and negative regulation of TOR signaling. Located in lysosomal membrane. Part of GATOR1 complex. Implicated in focal epilepsy. [provided by Alliance of Genome Resources, Apr 2022]

NPRL3 Gene-Disease associations (from GenCC):

• focal epilepsy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• epilepsy, familial focal, with variable foci 3

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• familial focal epilepsy with variable foci

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.46).
• BP7: Synonymous conserved (PhyloP=0.412 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001077350.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPRL3	NM_001077350.3	MANE Select	c.117A>C	p.Thr39Thr	splice_region synonymous	Exon 2 of 14	NP_001070818.1
	NPRL3	NM_001243247.2		c.-255A>C		splice_region	Exon 2 of 15	NP_001230176.1
	NPRL3	NM_001039476.3		c.-216A>C		splice_region	Exon 1 of 11	NP_001034565.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NPRL3	ENST00000611875.5	TSL:5 MANE Select	c.117A>C	p.Thr39Thr	splice_region synonymous	Exon 2 of 14	ENSP00000478273.1
	NPRL3	ENST00000399953.7	TSL:1	c.117A>C	p.Thr39Thr	splice_region synonymous	Exon 1 of 12	ENSP00000382834.4
	NPRL3	ENST00000621703.4	TSL:1	n.117A>C		splice_region non_coding_transcript_exon	Exon 1 of 11	ENSP00000477801.1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 30

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.46
CADD	Benign	14
DANN	Benign	0.81
PhyloP100		0.41
PromoterAI		-0.052	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs764156867; hg19: chr16-188150;