1-78016023-G-A

Variant names:

• chr1-78016023-G-A
• rs1660632485
• NM_007034.5:c.790G>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001317103.2(DNAJB4):​c.221G>A​(p.Trp74*) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DNAJB4 NM_001317103.2 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

Genes affected

DNAJB4 (HGNC:14886): (DnaJ heat shock protein family (Hsp40) member B4) The protein encoded by this gene is a molecular chaperone, tumor suppressor, and member of the heat shock protein-40 family. The encoded protein binds the cell adhesion protein E-cadherin and targets it to the plasma membrane. This protein also binds incorrectly folded E-cadherin and targets it for endoplasmic reticulum-associated degradation. This gene is a strong tumor suppressor for colorectal carcinoma, and downregulation of it may serve as a good biomarker for predicting patient outcomes. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2015]

GIPC2 (HGNC:18177): (GIPC PDZ domain containing family member 2) Enables identical protein binding activity. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001317103.2. 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
	DNAJB4	NM_007034.5	MANE Select	c.790G>A	p.Gly264Ser	missense	Exon 3 of 3	NP_008965.2
	DNAJB4	NM_001317103.2		c.221G>A	p.Trp74*	stop_gained	Exon 2 of 2	NP_001304032.1
	DNAJB4	NM_001317099.2		c.790G>A	p.Gly264Ser	missense	Exon 4 of 4	NP_001304028.1	Q9UDY4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNAJB4	ENST00000370763.6	TSL:1 MANE Select	c.790G>A	p.Gly264Ser	missense	Exon 3 of 3	ENSP00000359799.5	Q9UDY4
	DNAJB4	ENST00000867099.1		c.790G>A	p.Gly264Ser	missense	Exon 4 of 4	ENSP00000537158.1
	DNAJB4	ENST00000867100.1		c.790G>A	p.Gly264Ser	missense	Exon 4 of 4	ENSP00000537159.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.52
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Benign	0.30	T
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.30	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Pathogenic	4.0	H
PhyloP100		10
PrimateAI	Uncertain	0.61	T
PROVEAN	Pathogenic	-5.7	D
REVEL	Pathogenic	0.79
Sift	Uncertain	0.017	D
Sift4G	Uncertain	0.0040	D
Polyphen		1.0	D
Vest4		0.83
MutPred		0.97		Loss of catalytic residue at G264 (P = 0.109)
MVP		0.82
MPC		0.74
ClinPred		1.0	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.75
gMVP		0.82
Mutation Taster		=52/48	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1660632485; hg19: chr1-78481707;