NM_015331.3:c.49C>T

Variant names:

• chr1-160343445-C-T
• rs200632380
• NM_015331.3:c.49C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015331.3(NCSTN):​c.49C>T​(p.Leu17Phe) 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. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L17V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: NCSTN NM_015331.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.605
• Publications: 0 publications found

Genes affected

NCSTN (HGNC:17091): (nicastrin) This gene encodes a type I transmembrane glycoprotein that is an integral component of the multimeric gamma-secretase complex. The encoded protein cleaves integral membrane proteins, including Notch receptors and beta-amyloid precursor protein, and may be a stabilizing cofactor required for gamma-secretase complex assembly. The cleavage of beta-amyloid precursor protein yields amyloid beta peptide, the main component of the neuritic plaque and the hallmark lesion in the brains of patients with Alzheimer's disease; however, the nature of the encoded protein's role in Alzheimer's disease is not known for certain. Mutations in this gene are associated with familial acne inversa. A pseudogene of this gene is present on chromosome 21. Alternatively spliced transcript variants of this gene have been described, but the full-length nature of some of these variants has not been determined. [provided by RefSeq, Feb 2014]

COPA (HGNC:2230): (COPI coat complex subunit alpha) In eukaryotic cells, protein transport between the endoplasmic reticulum and Golgi compartments is mediated in part by non-clathrin-coated vesicular coat proteins (COPs). Seven coat proteins have been identified, and they represent subunits of a complex known as coatomer. The subunits are designated alpha-COP, beta-COP, beta-prime-COP, gamma-COP, delta-COP, epsilon-COP, and zeta-COP. The alpha-COP, encoded by COPA, shares high sequence similarity with RET1P, the alpha subunit of the coatomer complex in yeast. Also, the N-terminal 25 amino acids of alpha-COP encode the bioactive peptide, xenin, which stimulates exocrine pancreatic secretion and may act as a gastrointestinal hormone. Alternative splicing results in multiple splice forms encoding distinct isoforms. [provided by RefSeq, Jul 2008]

COPA Gene-Disease associations (from GenCC):

• autoimmune interstitial lung disease-arthritis syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1356771).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015331.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NCSTN	NM_015331.3	MANE Select	c.49C>T	p.Leu17Phe	missense	Exon 1 of 17	NP_056146.1	Q92542-1
	NCSTN	NM_001349729.2		c.49C>T	p.Leu17Phe	missense	Exon 1 of 16	NP_001336658.1
	NCSTN	NM_001290186.2		c.49C>T	p.Leu17Phe	missense	Exon 1 of 14	NP_001277115.1	A0A8V8TPR8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NCSTN	ENST00000294785.10	TSL:1 MANE Select	c.49C>T	p.Leu17Phe	missense	Exon 1 of 17	ENSP00000294785.5	Q92542-1
	NCSTN	ENST00000368063.6	TSL:1	n.49C>T		non_coding_transcript_exon	Exon 1 of 18	ENSP00000357042.2	A0A2U3TZL9
	NCSTN	ENST00000913597.1		c.49C>T	p.Leu17Phe	missense	Exon 1 of 18	ENSP00000583656.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.051
BayesDel_addAF	Benign	0.00080	T
BayesDel_noAF	Benign	-0.24
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.26	T
Eigen	Benign	-0.47
Eigen_PC	Benign	-0.32
FATHMM_MKL	Benign	0.29	N
LIST_S2	Benign	0.66	T
M_CAP	Benign	0.031	D
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L
PhyloP100		0.60
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-0.35	N
REVEL	Benign	0.11
Sift	Benign	0.14	T
Sift4G	Benign	0.34	T
Polyphen		0.0010	B
Vest4		0.17
MutPred		0.46		Gain of catalytic residue at L17 (P = 0.07)
MVP		0.65
MPC		0.068
ClinPred		0.13	T
GERP RS		1.9
PromoterAI		0.00040	Neutral
Varity_R		0.088
gMVP		0.54
Mutation Taster		=77/23	polymorphism

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

Other links and lift over

dbSNP: rs200632380; hg19: chr1-160313235;