NM_021098.3:c.2255C>T

Variant names:

• chr16-1204262-C-T
• rs761877111
• NM_021098.3:c.2255C>T
• CACNA1H p.Pro752Leu

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_Moderate BP6 BS2

The NM_021098.3(CACNA1H):​c.2255C>T​(p.Pro752Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000466 in 1,608,404 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P752A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000046 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000047 (1 hom.)
• Consequence: CACNA1H NM_021098.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 0.0550
• Publications: 0 publications found

Genes affected

CACNA1H (HGNC:1395): (calcium voltage-gated channel subunit alpha1 H) This gene encodes a T-type member of the alpha-1 subunit family, a protein in the voltage-dependent calcium channel complex. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization and consist of a complex of alpha-1, alpha-2/delta, beta, and gamma subunits in a 1:1:1:1 ratio. The alpha-1 subunit has 24 transmembrane segments and forms the pore through which ions pass into the cell. There are multiple isoforms of each of the proteins in the complex, either encoded by different genes or the result of alternative splicing of transcripts. Alternate transcriptional splice variants, encoding different isoforms, have been characterized for the gene described here. Studies suggest certain mutations in this gene lead to childhood absence epilepsy (CAE). [provided by RefSeq, Jul 2008]

CACNA1H Gene-Disease associations (from GenCC):

• hyperaldosteronism, familial, type IV

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• childhood absence epilepsy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• epilepsy, childhood absence, susceptibility to, 6

  Inheritance: AD Classification: LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• epilepsy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -7 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.19327748).
• BP6: Variant 16-1204262-C-T is Benign according to our data. Variant chr16-1204262-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 529598.
• BS2: High AC in GnomAd4 at 7 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021098.3. 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
	CACNA1H	NM_021098.3	MANE Select	c.2255C>T	p.Pro752Leu	missense	Exon 10 of 35	NP_066921.2	O95180-1
	CACNA1H	NM_001005407.2		c.2255C>T	p.Pro752Leu	missense	Exon 10 of 34	NP_001005407.1	O95180-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1H	ENST00000348261.11	TSL:1 MANE Select	c.2255C>T	p.Pro752Leu	missense	Exon 10 of 35	ENSP00000334198.7	O95180-1
	CACNA1H	ENST00000569107.6	TSL:1	c.2255C>T	p.Pro752Leu	missense	Exon 10 of 34	ENSP00000454990.2	H3BNT0
	CACNA1H	ENST00000711493.1		c.2255C>T	p.Pro752Leu	missense	Exon 10 of 34	ENSP00000518778.1	A0AAA9YHG8

Frequencies

GnomAD3 genomes AF: 0.0000460 AC: 7 AN: 152240 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000641 AC: 15 AN: 234162 AF XY: 0.0000855

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000119

Gnomad ASJ exome AF: 0.000207

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000772

Gnomad OTH exome AF: 0.000173

GnomAD4 exome AF: 0.0000467 AC: 68 AN: 1456164 Hom.: 1 Cov.: 32 AF XY: 0.0000511 AC XY: 37 AN XY: 723996

African (AFR) AF: 0.00 AC: 0 AN: 33360

American (AMR) AF: 0.000136 AC: 6 AN: 44266

Ashkenazi Jewish (ASJ) AF: 0.000231 AC: 6 AN: 25986

East Asian (EAS) AF: 0.00 AC: 0 AN: 39478

South Asian (SAS) AF: 0.00 AC: 0 AN: 85760

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51650

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5746

European-Non Finnish (NFE) AF: 0.0000451 AC: 50 AN: 1109784

Other (OTH) AF: 0.0000998 AC: 6 AN: 60134

GnomAD4 genome AF: 0.0000460 AC: 7 AN: 152240 Hom.: 0 Cov.: 33 AF XY: 0.0000672 AC XY: 5 AN XY: 74378

African (AFR) AF: 0.00 AC: 0 AN: 41468

American (AMR) AF: 0.000262 AC: 4 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68030

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000227

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	Idiopathic generalized epilepsy;C4310756:Hyperaldosteronism, familial, type IV (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.090
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	15
DANN	Benign	0.75
DEOGEN2	Benign	0.10	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.61	T
M_CAP	Pathogenic	0.61	D
MetaRNN	Benign	0.19	T
MetaSVM	Uncertain	-0.23	T
MutationAssessor	Benign	1.8	L
PhyloP100		0.055
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-0.060	N
REVEL	Benign	0.11
Sift	Benign	0.42	T
Sift4G	Benign	0.32	T
Varity_R		0.043
gMVP		0.25
Mutation Taster		=99/1	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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs761877111;

hg19: chr16-1254262;