16-4426030-C-T

Position:

• chr16-4426030-C-T

Variant summary

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

The NM_005147.6(DNAJA3):​c.149C>T​(p.Ser50Phe) 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: 34)
• Consequence: DNAJA3 NM_005147.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.41

Genes affected

DNAJA3 (HGNC:11808): (DnaJ heat shock protein family (Hsp40) member A3) This gene encodes a member of the DNAJ/Hsp40 protein family. DNAJ/Hsp40 proteins stimulate the ATPase activity of Hsp70 chaperones and play critical roles in protein folding, degradation, and multimeric complex assembly. The encoded protein is localized to mitochondria and mediates several cellular processes including proliferation, survival and apoptotic signal transduction. The encoded protein also plays a critical role in tumor suppression through interactions with oncogenic proteins including ErbB2 and the p53 tumor suppressor protein. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Aug 2011]

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=0.123651534).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DNAJA3	NM_005147.6	c.149C>T	p.Ser50Phe	missense_variant	1/12	ENST00000262375.11
DNAJA3	NM_001135110.3	c.149C>T	p.Ser50Phe	missense_variant	1/11
DNAJA3	XM_047434875.1	c.149C>T	p.Ser50Phe	missense_variant	1/11
DNAJA3	NM_001286516.2	c.39C>T	p.Val13=	synonymous_variant	1/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNAJA3	ENST00000262375.11	c.149C>T	p.Ser50Phe	missense_variant	1/12	1	NM_005147.6	P3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 79

GnomAD4 genome Cov.: 34

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

Dec 28, 2022

The c.149C>T (p.S50F) alteration is located in exon 1 (coding exon 1) of the DNAJA3 gene. This alteration results from a C to T substitution at nucleotide position 149, causing the serine (S) at amino acid position 50 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	0.11
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	17
DANN	Uncertain	1.0
DEOGEN2	Benign	0.11	T;.;T
Eigen	Benign	-0.59
Eigen_PC	Benign	-0.48
FATHMM_MKL	Benign	0.17	N
M_CAP	Benign	0.050	D
MetaRNN	Benign	0.12	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N;N;.
MutationTaster	Benign	1.0	D;N;N
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-0.56	N;N;.
REVEL	Benign	0.058
Sift	Benign	0.16	T;T;.
Sift4G	Uncertain	0.051	T;T;T
Polyphen		0.035	B;B;.
Vest4		0.19
MutPred		0.38		Loss of disorder (P = 0.0057);Loss of disorder (P = 0.0057);Loss of disorder (P = 0.0057);
MVP		0.83
MPC		0.064
ClinPred		0.16	T
GERP RS		4.0
Varity_R		0.040
gMVP		0.39

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: rs2056617446; hg19: chr16-4476031;