9-133636517-A-T

Variant names:

• chr9-133636517-A-T
• rs745685569
• NM_000787.4:c.146A>T
• DBH p.Tyr49Phe

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000787.4(DBH):​c.146A>T​(p.Tyr49Phe) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y49C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DBH NM_000787.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.36
• Publications: 0 publications found

Genes affected

DBH (HGNC:2689): (dopamine beta-hydroxylase) The protein encoded by this gene is an oxidoreductase belonging to the copper type II, ascorbate-dependent monooxygenase family. The encoded protein, expressed in neuroscretory vesicles and chromaffin granules of the adrenal medulla, catalyzes the conversion of dopamine to norepinephrine, which functions as both a hormone and as the main neurotransmitter of the sympathetic nervous system. The enzyme encoded by this gene exists exists in both soluble and membrane-bound forms, depending on the absence or presence, respectively, of a signal peptide. Mutations in this gene cause dopamine beta-hydroxylate deficiency in human patients, characterized by deficits in autonomic and cardiovascular function, including hypotension and ptosis. Polymorphisms in this gene may play a role in a variety of psychiatric disorders. [provided by RefSeq, Aug 2017]

DBH Gene-Disease associations (from GenCC):

• orthostatic hypotension 1

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19058126).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000787.4. 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
	DBH	NM_000787.4	MANE Select	c.146A>T	p.Tyr49Phe	missense	Exon 1 of 12	NP_000778.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DBH	ENST00000393056.8	TSL:1 MANE Select	c.146A>T	p.Tyr49Phe	missense	Exon 1 of 12	ENSP00000376776.2	P09172
	DBH	ENST00000860939.1		c.146A>T	p.Tyr49Phe	missense	Exon 1 of 12	ENSP00000530998.1
	DBH	ENST00000263611.3	TSL:2	c.140A>T	p.Tyr47Phe	missense	Exon 1 of 3	ENSP00000263611.3	Q5T382

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.089
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	14
DANN	Benign	0.75
DEOGEN2	Benign	0.35	T
Eigen	Benign	-0.40
Eigen_PC	Benign	-0.28
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	L
PhyloP100		4.4
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.094
Sift	Benign	0.40	T
Sift4G	Benign	0.37	T
PromoterAI		-0.015	Neutral
Varity_R		0.22
gMVP		0.76
Mutation Taster		=59/41	polymorphism

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs745685569; hg19: chr9-136501639;