10-103473347-G-A

Variant names:

• chr10-103473347-G-A
• rs2033345342
• NM_001129742.2:c.901C>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001129742.2(CALHM3):​c.901C>T​(p.Leu301Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000369 in 1,353,584 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000037 (0 hom.)
• Consequence: CALHM3 NM_001129742.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.85

Genes affected

CALHM3 (HGNC:23458): (calcium homeostasis modulator 3) Predicted to enable cation channel activity. Predicted to be involved in ATP transport. Predicted to be located in basolateral plasma membrane. Predicted to be integral component of plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CALHM3	NM_001129742.2	c.901C>T	p.Leu301Phe	missense_variant	Exon 3 of 3	ENST00000369783.4	NP_001123214.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CALHM3	ENST00000369783.4	c.901C>T	p.Leu301Phe	missense_variant	Exon 3 of 3	1	NM_001129742.2	ENSP00000358798.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000369 AC: 5 AN: 1353584 Hom.: 0 Cov.: 29 AF XY: 0.00000605 AC XY: 4 AN XY: 661696

Gnomad4 AFR exome AF: 0.0000331

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: 0.00000380

Gnomad4 OTH exome AF: 0.00

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

Apr 22, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.901C>T (p.L301F) alteration is located in exon 3 (coding exon 3) of the CALHM3 gene. This alteration results from a C to T substitution at nucleotide position 901, causing the leucine (L) at amino acid position 301 to be replaced by a phenylalanine (F). 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	0.29
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Pathogenic	26
DANN	Uncertain	1.0
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.021	T
MetaRNN	Uncertain	0.51	D
MetaSVM	Benign	-0.88	T
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.14
Sift	Uncertain	0.0070	D
Sift4G	Uncertain	0.019	D
Vest4		0.53
MutPred		0.35		Loss of stability (P = 0.0441);
MVP		0.24
ClinPred		0.97	D
GERP RS		5.7
Varity_R		0.29
gMVP		0.52

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: rs2033345342; hg19: chr10-105233104;