17-39906151-C-T

Position:

• chr17-39906151-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001165958.2(GSDMB):​c.848G>A​(p.Cys283Tyr) 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. 13/18 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: GSDMB NM_001165958.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0360

Genes affected

GSDMB (HGNC:23690): (gasdermin B) This gene encodes a member of the gasdermin-domain containing protein family. Other gasdermin-family genes are implicated in the regulation of apoptosis in epithelial cells, and are linked to cancer. Alternative splicing and the use of alternative promoters results in multiple transcript variants. Additional variants have been described, but they are candidates for nonsense-mediated mRNA decay (NMD) and are unlikely to be protein-coding. [provided by RefSeq, Nov 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2616976).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GSDMB	NM_001165958.2	c.848G>A	p.Cys283Tyr	missense_variant	8/11	ENST00000418519.6	NP_001159430.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GSDMB	ENST00000418519.6	c.848G>A	p.Cys283Tyr	missense_variant	8/11	5	NM_001165958.2	ENSP00000415049	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000611 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 28, 2023

The c.848G>A (p.C283Y) alteration is located in exon 8 (coding exon 7) of the GSDMB gene. This alteration results from a G to A substitution at nucleotide position 848, causing the cysteine (C) at amino acid position 283 to be replaced by a tyrosine (Y). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	6.1
DANN	Benign	0.28
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.017	N
LIST_S2	Benign	0.54	.;T;.;T;T;T
M_CAP	Benign	0.0039	T
MetaRNN	Benign	0.26	T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	N;N;N;N;N;N
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-2.2	.;N;N;.;N;N
REVEL	Benign	0.032
Sift	Benign	0.089	.;T;T;.;T;D
Sift4G	Uncertain	0.037	D;D;D;D;D;D
Polyphen		0.24	B;B;B;B;.;B
Vest4		0.49
MVP		0.030
MPC		0.48
ClinPred		0.17	T
GERP RS		-2.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
gMVP		0.45

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-38062404;