chr16-58001528-G-T

Variant names:

• chr16-58001528-G-T
• rs2072558848
• NM_024598.4:c.45G>T

Variant summary

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

The NM_024598.4(USB1):​c.45G>T​(p.Glu15Asp) 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. 15/22 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: USB1 NM_024598.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.272
• Publications: 0 publications found

Genes affected

USB1 (HGNC:25792): (U6 snRNA biogenesis phosphodiesterase 1) This gene encodes a protein with several conserved domains, however, its exact function is not known. Mutations in this gene are associated with poikiloderma with neutropenia (PN), which shows phenotypic overlap with Rothmund-Thomson syndrome (RTS) caused by mutations in the RECQL4 gene. It is believed that this gene product interacts with RECQL4 protein via SMAD4 proteins, explaining the partial clinical overlap between PN and RTS. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Mar 2011]

USB1 Gene-Disease associations (from GenCC):

• poikiloderma with neutropenia

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet
• dyskeratosis congenita

  Inheritance: AD Classification: SUPPORTIVE Submitted by: 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=0.12839782).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024598.4. 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
	USB1	NM_024598.4	MANE Select	c.45G>T	p.Glu15Asp	missense	Exon 1 of 7	NP_078874.2
	USB1	NM_001195302.2		c.45G>T	p.Glu15Asp	missense	Exon 1 of 6	NP_001182231.1	Q9BQ65-2
	USB1	NM_001204911.2		c.45G>T	p.Glu15Asp	missense	Exon 1 of 4	NP_001191840.1	Q9BQ65-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	USB1	ENST00000219281.8	TSL:1 MANE Select	c.45G>T	p.Glu15Asp	missense	Exon 1 of 7	ENSP00000219281.3	Q9BQ65-1
	USB1	ENST00000561568.6	TSL:4	c.-2G>T		5_prime_UTR_premature_start_codon_gain	Exon 1 of 7	ENSP00000457322.2	H3BTT8
	USB1	ENST00000539737.6	TSL:2	c.45G>T	p.Glu15Asp	missense	Exon 1 of 6	ENSP00000446143.2	Q9BQ65-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0021	T
Eigen	Benign	0.054
Eigen_PC	Benign	0.066
FATHMM_MKL	Benign	0.67	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.8	L
PhyloP100		0.27
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-0.32	N
REVEL	Benign	0.18
Sift	Benign	0.29	T
Sift4G	Benign	0.30	T
Polyphen		0.99	D
Vest4		0.21
MutPred		0.10		Gain of glycosylation at S12 (P = 0.1547)
MVP		0.30
MPC		0.53
ClinPred		0.93	D
GERP RS		1.9
PromoterAI		0.0075	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.085
gMVP		0.34

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs2072558848; hg19: chr16-58035432;