rs749576988

Positions:

• chr10-119677153-C-A
• chr10-119677153-C-T

Variant summary

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

The NM_004281.4(BAG3):​c.1599C>A​(p.Asp533Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BAG3 NM_004281.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.56

Genes affected

BAG3 (HGNC:939): (BAG cochaperone 3) BAG proteins compete with Hip for binding to the Hsc70/Hsp70 ATPase domain and promote substrate release. All the BAG proteins have an approximately 45-amino acid BAG domain near the C terminus but differ markedly in their N-terminal regions. The protein encoded by this gene contains a WW domain in the N-terminal region and a BAG domain in the C-terminal region. The BAG domains of BAG1, BAG2, and BAG3 interact specifically with the Hsc70 ATPase domain in vitro and in mammalian cells. All 3 proteins bind with high affinity to the ATPase domain of Hsc70 and inhibit its chaperone activity in a Hip-repressible manner. [provided by RefSeq, Jul 2008]

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=0.17283586).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BAG3	NM_004281.4	c.1599C>A	p.Asp533Glu	missense_variant	4/4	ENST00000369085.8	NP_004272.2
BAG3	XM_005270287.2	c.1596C>A	p.Asp532Glu	missense_variant	4/4		XP_005270344.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BAG3	ENST00000369085.8	c.1599C>A	p.Asp533Glu	missense_variant	4/4	1	NM_004281.4	ENSP00000358081.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Myofibrillar myopathy 6;C3151293:Dilated cardiomyopathy 1HH Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 09, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This sequence change replaces aspartic acid, which is acidic and polar, with glutamic acid, which is acidic and polar, at codon 533 of the BAG3 protein (p.Asp533Glu). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 573684). This variant has not been reported in the literature in individuals affected with BAG3-related conditions. This variant is not present in population databases (gnomAD no frequency). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.092
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	18
DANN	Uncertain	1.0
DEOGEN2	Benign	0.088	T
Eigen	Benign	-0.099
Eigen_PC	Benign	0.076
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.65	T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-0.66	T
MutationAssessor	Uncertain	2.1	M
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-0.18	N
REVEL	Benign	0.15
Sift	Uncertain	0.0050	D
Sift4G	Benign	0.16	T
Polyphen		0.067	B
Vest4		0.043
MutPred		0.24		Loss of sheet (P = 0.1158);
MVP		0.71
MPC		0.065
ClinPred		0.35	T
GERP RS		5.8
Varity_R		0.041
gMVP		0.18

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: rs749576988; hg19: chr10-121436665;