1-9733535-T-C

Position:

• chr1-9733535-T-C

Variant summary

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

The NM_001009566.3(CLSTN1):​c.2293A>G​(p.Met765Val) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,766 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CLSTN1 NM_001009566.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.08

Genes affected

CLSTN1 (HGNC:17447): (calsyntenin 1) This gene is a member of the calsyntenin family, a subset of the cadherin superfamily. The encoded transmembrane protein, also known as alcadein-alpha, is thought to bind to kinesin-1 motors to mediate the axonal anterograde transport of certain types of vesicle. Amyloid precursor protein (APP) is trafficked via these vesicles and so this protein is being investigated to see how it might contribute to the mechanisms underlying Alzheimer's disease. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2014]

CLSTN1 (HGNC:):

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=0.30385244).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CLSTN1	NM_001009566.3	c.2293A>G	p.Met765Val	missense_variant	16/19	ENST00000377298.9	NP_001009566.1
CLSTN1	NM_014944.4	c.2263A>G	p.Met755Val	missense_variant	15/18		NP_055759.3
CLSTN1	NM_001302883.1	c.2236A>G	p.Met746Val	missense_variant	15/18		NP_001289812.1
CLSTN1	XM_047449470.1	c.2206A>G	p.Met736Val	missense_variant	14/17		XP_047305426.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CLSTN1	ENST00000377298.9	c.2293A>G	p.Met765Val	missense_variant	16/19	1	NM_001009566.3	ENSP00000366513.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461766 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727202

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

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 04, 2022

The c.2293A>G (p.M765V) alteration is located in exon 16 (coding exon 16) of the CLSTN1 gene. This alteration results from a A to G substitution at nucleotide position 2293, causing the methionine (M) at amino acid position 765 to be replaced by a valine (V). 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	0.12
BayesDel_addAF	Uncertain	0.068	T
BayesDel_noAF	Benign	-0.14
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.035	T;.;.
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.85	D;D;D
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.30	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.7	L;.;.
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-0.40	N;N;N
REVEL	Benign	0.17
Sift	Benign	0.32	T;T;T
Sift4G	Benign	0.20	T;T;T
Polyphen		0.95	P;.;D
Vest4		0.81
MutPred		0.20		Loss of phosphorylation at Y768 (P = 0.1141);.;.;
MVP		0.49
MPC		0.56
ClinPred		0.85	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.18
gMVP		0.62

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

Publications

LitVar

Other links and lift over

dbSNP: rs1650519105; hg19: chr1-9793593;