rs483353068

Positions:

• chr3-114339426-C-G
• chr3-114339426-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP2 PP5

The NM_001348800.3(ZBTB20):​c.1805G>C​(p.Gly602Ala) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ZBTB20 NM_001348800.3 missense, splice_region
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 7.91

Genes affected

ZBTB20 (HGNC:13503): (zinc finger and BTB domain containing 20) This gene, which was initially designated as dendritic cell-derived BTB/POZ zinc finger (DPZF), belongs to a family of transcription factors with an N-terminal BTB/POZ domain and a C-terminal DNA-bindng zinc finger domain. The BTB/POZ domain is a hydrophobic region of approximately 120 aa which mediates association with other BTB/POZ domain-containing proteins. This gene acts as a transcriptional repressor and plays a role in many processes including neurogenesis, glucose homeostasis, and postnatal growth. Mutations in this gene have been associated with Primrose syndrome as well as the 3q13.31 microdeletion syndrome. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Feb 2017]

ZBTB20 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ZBTB20. . Gene score misZ 4.272 (greater than the threshold 3.09). Trascript score misZ 3.9474 (greater than threshold 3.09). GenCC has associacion of gene with Primrose syndrome, diabetes mellitus.
• PP5: Variant 3-114339426-C-G is Pathogenic according to our data. Variant chr3-114339426-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 139447.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr3-114339426-C-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ZBTB20	NM_001348800.3	c.1805G>C	p.Gly602Ala	missense_variant, splice_region_variant	12/12	ENST00000675478.1	NP_001335729.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ZBTB20	ENST00000675478.1	c.1805G>C	p.Gly602Ala	missense_variant, splice_region_variant	12/12		NM_001348800.3	ENSP00000501561.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Primrose syndrome Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Aug 01, 2014	- -
Pathogenic, no assertion criteria provided	literature only	Reparto di Fisiopatologia delle Malattie Genetiche, Dipartimento di Ematologia, Oncologia; Istituto Superiore di Sanità	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	34
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.58	.;.;.;.;.;D;.
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.87	.;.;D;.;.;D;.
M_CAP	Benign	0.079	D
MetaRNN	Uncertain	0.55	D;D;D;D;D;D;D
MetaSVM	Benign	-0.92	T
MutationAssessor	Uncertain	2.4	.;.;.;.;.;M;.
PrimateAI	Pathogenic	0.95	D
PROVEAN	Pathogenic	-5.8	D;D;D;D;D;D;D
REVEL	Uncertain	0.40
Sift	Pathogenic	0.0	D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;D;D
Polyphen		1.0	.;.;.;.;.;D;.
Vest4		0.67
MutPred		0.56		.;.;.;.;.;Loss of ubiquitination at K604 (P = 0.0499);.;
MVP		0.60
MPC		2.1
ClinPred		1.0	D
GERP RS		6.0
Varity_R		0.91
gMVP		0.87

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.98
SpliceAI score (max)		0.050		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: rs483353068; hg19: chr3-114058273;