rs754682859

Variant names:

• chr10-103455696-G-A
• rs754682859
• NM_001001412.4:c.607C>T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001001412.4(CALHM1):​c.607C>T​(p.Arg203Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,460,872 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R203H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: CALHM1 NM_001001412.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.91
• Publications: 1 publications found

Genes affected

CALHM1 (HGNC:23494): (calcium homeostasis modulator 1) This gene encodes a calcium channel that plays a role in processing of amyloid-beta precursor protein. A polymorphism at this locus has been reported to be associated with susceptibility to late-onset Alzheimer's disease in some populations, but the pathogenicity of this polymorphism is unclear.[provided by RefSeq, Mar 2010]

ENSG00000234699 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.769

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001001412.4. 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
	CALHM1	NM_001001412.4	MANE Select	c.607C>T	p.Arg203Cys	missense	Exon 2 of 2	NP_001001412.3	Q8IU99

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CALHM1	ENST00000329905.6	TSL:1 MANE Select	c.607C>T	p.Arg203Cys	missense	Exon 2 of 2	ENSP00000329926.6	Q8IU99
	ENSG00000234699	ENST00000411906.2	TSL:2	n.1170+2460G>A		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD2 exomes AF: 0.00 AC: 0 AN: 247928 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1460872 Hom.: 0 Cov.: 35 AF XY: 0.00000550 AC XY: 4 AN XY: 726760

African (AFR) AF: 0.00 AC: 0 AN: 33452

American (AMR) AF: 0.0000224 AC: 1 AN: 44680

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52550

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111948

Other (OTH) AF: 0.00 AC: 0 AN: 60384

GnomAD4 genome Cov.: 34

Alfa AF: 0.0000712 Hom.: 0

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.82
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.030
CADD	Pathogenic	30
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.18	T
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.96	D
M_CAP	Benign	0.072	D
MetaRNN	Pathogenic	0.77	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.6	M
PhyloP100		3.9
PrimateAI	Uncertain	0.76	T
PROVEAN	Uncertain	-2.9	D
REVEL	Benign	0.26
Sift	Uncertain	0.0020	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.77
MutPred		0.57		Loss of methylation at R203 (P = 0.0306)
MVP		0.32
MPC		0.78
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.29
gMVP		0.90
Mutation Taster		=38/62	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs754682859; hg19: chr10-105215453;