chr5-134996409-C-T

Position:

• chr5-134996409-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_178019.3(CATSPER3):​c.389C>T​(p.Ala130Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,848 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CATSPER3 NM_178019.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.48

Genes affected

CATSPER3 (HGNC:20819): (cation channel sperm associated 3) Predicted to enable voltage-gated calcium channel activity. Predicted to be involved in flagellated sperm motility; sodium ion transport; and sperm capacitation. Predicted to be located in plasma membrane. Predicted to be part of CatSper complex. Predicted to be active in acrosomal vesicle. [provided by Alliance of Genome Resources, Apr 2022]

PCBD2 (HGNC:24474): (pterin-4 alpha-carbinolamine dehydratase 2) Predicted to enable 4-alpha-hydroxytetrahydrobiopterin dehydratase activity. Involved in positive regulation of transcription, DNA-templated. Predicted to be located in nucleus. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11681074).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CATSPER3	NM_178019.3	c.389C>T	p.Ala130Val	missense_variant	3/8	ENST00000282611.8	NP_821138.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CATSPER3	ENST00000282611.8	c.389C>T	p.Ala130Val	missense_variant	3/8	1	NM_178019.3	ENSP00000282611.6
PCBD2	ENST00000504352.1	n.*495C>T		non_coding_transcript_exon_variant	7/8	5		ENSP00000426161.1
PCBD2	ENST00000504352.1	n.*495C>T		3_prime_UTR_variant	7/8	5		ENSP00000426161.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461848 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 727224

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: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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

Jul 25, 2024

The c.389C>T (p.A130V) alteration is located in exon 3 (coding exon 3) of the CATSPER3 gene. This alteration results from a C to T substitution at nucleotide position 389, causing the alanine (A) at amino acid position 130 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	0.072
BayesDel_addAF	Benign	-0.067	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	0.10
DANN	Benign	0.64
DEOGEN2	Benign	0.33	T
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.013	N
LIST_S2	Benign	0.25	T
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.12	T
MetaSVM	Uncertain	0.54	D
MutationAssessor	Benign	-0.23	N
PrimateAI	Benign	0.26	T
PROVEAN	Benign	0.090	N
REVEL	Benign	0.26
Sift	Benign	0.53	T
Sift4G	Benign	0.50	T
Polyphen		0.0010	B
Vest4		0.10
MutPred		0.55		Gain of helix (P = 0.132);
MVP		0.35
MPC		0.097
ClinPred		0.072	T
GERP RS		-4.8
Varity_R		0.031
gMVP		0.16

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs1444904551; hg19: chr5-134332099;