chr17-39725383-G-T

Variant names:

• chr17-39725383-G-T
• rs193920750
• NM_004448.4:c.2706G>T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_004448.4(ERBB2):​c.2706G>T​(p.Gln902His) variant causes a missense change. 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. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ERBB2 NM_004448.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.65
• Publications: 0 publications found

Genes affected

ERBB2 (HGNC:3430): (erb-b2 receptor tyrosine kinase 2) This gene encodes a member of the epidermal growth factor (EGF) receptor family of receptor tyrosine kinases. This protein has no ligand binding domain of its own and therefore cannot bind growth factors. However, it does bind tightly to other ligand-bound EGF receptor family members to form a heterodimer, stabilizing ligand binding and enhancing kinase-mediated activation of downstream signalling pathways, such as those involving mitogen-activated protein kinase and phosphatidylinositol-3 kinase. Allelic variations at amino acid positions 654 and 655 of isoform a (positions 624 and 625 of isoform b) have been reported, with the most common allele, Ile654/Ile655, shown here. Amplification and/or overexpression of this gene has been reported in numerous cancers, including breast and ovarian tumors. Alternative splicing results in several additional transcript variants, some encoding different isoforms and others that have not been fully characterized. [provided by RefSeq, Jul 2008]

ERBB2 Gene-Disease associations (from GenCC):

• Hirschsprung disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• lung cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• glioma susceptibility 1

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
• visceral neuropathy, familial, 2, autosomal recessive

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.837

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004448.4. 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
	ERBB2	NM_004448.4	MANE Select	c.2706G>T	p.Gln902His	missense	Exon 22 of 27	NP_004439.2	P04626-1
	ERBB2	NM_001382784.1		c.2823G>T	p.Gln941His	missense	Exon 23 of 28	NP_001369713.1
	ERBB2	NM_001382785.1		c.2808G>T	p.Gln936His	missense	Exon 23 of 28	NP_001369714.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ERBB2	ENST00000269571.10	TSL:1 MANE Select	c.2706G>T	p.Gln902His	missense	Exon 22 of 27	ENSP00000269571.4	P04626-1
	ERBB2	ENST00000584450.5	TSL:1	c.2706G>T	p.Gln902His	missense	Exon 22 of 26	ENSP00000463714.1	J3QLU9
	ERBB2	ENST00000578373.5	TSL:1	n.*2496G>T		non_coding_transcript_exon	Exon 22 of 27	ENSP00000463427.1	J3QL83

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	29
DANN	Benign	0.97
DEOGEN2	Uncertain	0.75	D
Eigen	Uncertain	0.67
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.88	D
M_CAP	Benign	0.079	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Benign	-0.31	T
MutationAssessor	Benign	1.6	L
PhyloP100		3.7
PrimateAI	Pathogenic	0.80	T
PROVEAN	Uncertain	-4.1	D
REVEL	Uncertain	0.43
Sift	Uncertain	0.0050	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.81
MutPred		0.59		Loss of MoRF binding (P = 0.1041)
MVP		0.90
MPC		2.4
ClinPred		0.98	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.72
gMVP		0.76

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

Other links and lift over

dbSNP: rs193920750; hg19: chr17-37881636; COSMIC: COSV99507540; COSMIC: COSV99507540;