chr1-226881923-G-A

Variant names:

• chr1-226881923-G-A
• NM_000447.3:c.16G>A

Variant summary

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

The NM_000447.3(PSEN2):​c.16G>A​(p.Ala6Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PSEN2 NM_000447.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.97
• Publications: 0 publications found

Genes affected

PSEN2 (HGNC:9509): (presenilin 2) Alzheimer's disease (AD) patients with an inherited form of the disease carry mutations in the presenilin proteins (PSEN1 or PSEN2) or the amyloid precursor protein (APP). These disease-linked mutations result in increased production of the longer form of amyloid-beta (main component of amyloid deposits found in AD brains). Presenilins are postulated to regulate APP processing through their effects on gamma-secretase, an enzyme that cleaves APP. Also, it is thought that the presenilins are involved in the cleavage of the Notch receptor such that, they either directly regulate gamma-secretase activity, or themselves act are protease enzymes. Two alternatively spliced transcript variants encoding different isoforms of PSEN2 have been identified. [provided by RefSeq, Jul 2008]

PSEN2 Gene-Disease associations (from GenCC):

• Alzheimer disease 4

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• early-onset autosomal dominant Alzheimer disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• dilated cardiomyopathy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000288674 (HGNC:):

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=0.16541475).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000447.3. 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
	PSEN2	NM_000447.3	MANE Select	c.16G>A	p.Ala6Thr	missense	Exon 4 of 13	NP_000438.2	P49810-1
	PSEN2	NM_001437537.1		c.16G>A	p.Ala6Thr	missense	Exon 3 of 12	NP_001424466.1
	PSEN2	NM_012486.3		c.16G>A	p.Ala6Thr	missense	Exon 4 of 13	NP_036618.2	P49810-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PSEN2	ENST00000366783.8	TSL:5 MANE Select	c.16G>A	p.Ala6Thr	missense	Exon 4 of 13	ENSP00000355747.3	P49810-1
	PSEN2	ENST00000366782.6	TSL:1	c.16G>A	p.Ala6Thr	missense	Exon 4 of 13	ENSP00000355746.2	P49810-1
	ENSG00000288674	ENST00000366779.6	TSL:2	n.16G>A		non_coding_transcript_exon	Exon 4 of 32	ENSP00000355741.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Alzheimer disease 4 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.083
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.18	T
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.089
FATHMM_MKL	Benign	0.60	D
LIST_S2	Benign	0.85	T
M_CAP	Uncertain	0.26	D
MetaRNN	Benign	0.17	T
MetaSVM	Uncertain	0.71	D
MutationAssessor	Benign	0.76	N
PhyloP100		4.0
PrimateAI	Uncertain	0.63	T
PROVEAN	Uncertain	-4.0	D
REVEL	Uncertain	0.54
Sift	Benign	0.24	T
Sift4G	Benign	0.77	T
Polyphen		0.13	B
Vest4		0.037
MutPred		0.019		Gain of phosphorylation at A6 (P = 0.0267)
MVP		0.92
MPC		0.23
ClinPred		0.60	D
GERP RS		4.1
Varity_R		0.033
gMVP		0.074
Mutation Taster		=80/20	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

hg19: chr1-227069624;