1-19357454-A-T

Variant names:

• chr1-19357454-A-T
• NM_004930.5:c.439T>A

Variant summary

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

The NM_004930.5(CAPZB):​c.439T>A​(p.Cys147Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CAPZB NM_004930.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.72

Genes affected

CAPZB (HGNC:1491): (capping actin protein of muscle Z-line subunit beta) This gene encodes the beta subunit of the barbed-end actin binding protein, which belongs to the F-actin capping protein family. The capping protein is a heterodimeric actin capping protein that blocks actin filament assembly and disassembly at the fast growing (barbed) filament ends and functions in regulating actin filament dynamics as well as in stabilizing actin filament lengths in muscle and nonmuscle cells. A pseudogene of this gene is located on the long arm of chromosome 2. Multiple alternatively spliced transcript variants encoding different isoforms have been found.[provided by RefSeq, Aug 2013]

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
CAPZB	NM_004930.5	c.439T>A	p.Cys147Ser	missense_variant	Exon 5 of 9	ENST00000264202.8	NP_004921.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CAPZB	ENST00000264202.8	c.439T>A	p.Cys147Ser	missense_variant	Exon 5 of 9	1	NM_004930.5	ENSP00000264202.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Sep 03, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.439T>A (p.C147S) alteration is located in exon 5 (coding exon 5) of the CAPZB gene. This alteration results from a T to A substitution at nucleotide position 439, causing the cysteine (C) at amino acid position 147 to be replaced by a serine (S). 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	Pathogenic	0.75
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.27
CADD	Benign	22
DANN	Benign	0.97
DEOGEN2	Benign	0.11	T;T;T;T;.
Eigen	Benign	0.12
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D;D;D;D
M_CAP	Benign	0.0093	T
MetaRNN	Uncertain	0.67	D;D;D;D;D
MetaSVM	Benign	-0.82	T
MutationAssessor	Benign	0.75	.;.;N;.;N
PrimateAI	Uncertain	0.76	T
PROVEAN	Uncertain	-3.4	D;D;D;D;D
REVEL	Uncertain	0.38
Sift	Benign	0.63	T;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T
Polyphen		0.96	D;B;.;B;B
Vest4		0.80
MutPred		0.44		.;.;.;Gain of disorder (P = 3e-04);.;
MVP		0.80
MPC		2.8
ClinPred		0.89	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.29
gMVP		0.80

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-19683948;