3-87240731-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_014043.4(CHMP2B):c.67G>A(p.Gly23Ser) 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. 13/21 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: CHMP2B NM_014043.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.12

Genes affected

CHMP2B (HGNC:24537): (charged multivesicular body protein 2B) This gene encodes a component of the heteromeric ESCRT-III complex (Endosomal Sorting Complex Required for Transport III) that functions in the recycling or degradation of cell surface receptors. ESCRT-III functions in the concentration and invagination of ubiquitinated endosomal cargos into intralumenal vesicles. The protein encoded by this gene is found as a monomer in the cytosol or as an oligomer in ESCRT-III complexes on endosomal membranes. It is expressed in neurons of all major regions of the brain. Mutations in this gene result in one form of familial frontotemporal lobar degeneration. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28547066).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHMP2B	NM_014043.4	c.67G>A	p.Gly23Ser	missense_variant	2/6	ENST00000263780.9
CHMP2B	NM_001410777.1	c.163G>A	p.Gly55Ser	missense_variant	3/7
CHMP2B	XM_011533576.3	c.115G>A	p.Gly39Ser	missense_variant	2/6
CHMP2B	NM_001244644.2	c.4-4983G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHMP2B	ENST00000263780.9	c.67G>A	p.Gly23Ser	missense_variant	2/6	1	NM_014043.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Frontotemporal dementia and/or amyotrophic lateral sclerosis 7 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Feb 14, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.0016	T
BayesDel_noAF	Benign	-0.24
Cadd	Benign	21
Dann	Uncertain	1.0
DEOGEN2	Benign	0.18	T;T;T
Eigen	Benign	-0.12
Eigen_PC	Benign	0.072
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.91	D;D;D
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.29	T;T;T
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	0.55	N;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.84	D
PROVEAN	Benign	0.47	N;N;.
REVEL	Benign	0.13
Sift	Benign	0.060	T;T;.
Sift4G	Benign	0.35	T;T;T
Polyphen		0.0060	B;.;.
Vest4		0.47
MutPred		0.38		Gain of phosphorylation at G23 (P = 0.0546);Gain of phosphorylation at G23 (P = 0.0546);.;
MVP		0.76
MPC		0.16
ClinPred		0.85	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.16
gMVP		0.35

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-87289881;