Genetic Variant CHMP7:p.Gln78Leu (chr8-23246928-A-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4BS2

The NM_152272.5(CHMP7):c.233A>T(p.Gln78Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000447 in 1,564,518 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CHMP7
NM_152272.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.15

Publications

0 publications found

Variant links:

Genes affected

CHMP7 (HGNC:28439): (charged multivesicular body protein 7) Involved in several processes, including late endosome to vacuole transport; midbody abscission; and mitotic nuclear division. Located in cytosol; nuclear envelope; and nucleoplasm. Part of ESCRT III complex. Colocalizes with chromatin. [provided by Alliance of Genome Resources, Apr 2022]

CHMP7 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.29328993).

BS2

High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHMP7	NM_152272.5 link	c.233A>T	p.Gln78Leu	missense_variant	Exon 2 of 11	ENST00000397677.6	NP_689485.1	Q8WUX9-1B3KUH0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHMP7	ENST00000397677.6 link	c.233A>T	p.Gln78Leu	missense_variant	Exon 2 of 11	1	NM_152272.5	ENSP00000380794.1		Q8WUX9-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152158

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000142

AC:

AN:

1412360

Hom.:

Cov.:

AF XY:

0.00000143

AC XY:

AN XY:

698406

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32538

American (AMR)

AF:

0.0000269

AC:

AN:

37156

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25268

East Asian (EAS)

AF:

0.00

AC:

AN:

37266

South Asian (SAS)

AF:

0.00

AC:

AN:

80648

European-Finnish (FIN)

AF:

0.00

AC:

AN:

47558

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5306

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1088080

Other (OTH)

AF:

0.0000171

AC:

AN:

58540

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152158

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74328

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41434

American (AMR)

AF:

0.000262

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000453

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 15, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.233A>T (p.Q78L) alteration is located in exon 2 (coding exon 1) of the CHMP7 gene. This alteration results from a A to T substitution at nucleotide position 233, causing the glutamine (Q) at amino acid position 78 to be replaced by a leucine (L). 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

AlphaMissense

Uncertain

0.38

BayesDel_addAF

Benign

0.0025

BayesDel_noAF

Benign

-0.23

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.23

T;T;T

Eigen

Benign

-0.067

Eigen_PC

Benign

0.11

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.57

.;T;T

M_CAP

Benign

0.015

MetaRNN

Benign

0.29

T;T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.8

L;L;.

PhyloP100

5.1

PrimateAI

Uncertain

0.79

PROVEAN

Uncertain

-3.0

D;D;D

REVEL

Benign

0.098

Sift

Benign

0.14

T;T;T

Sift4G

Uncertain

0.037

D;D;D

Polyphen

0.013

B;B;.

Vest4

0.31

MutPred

0.37

Loss of disorder (P = 0.0452);Loss of disorder (P = 0.0452);Loss of disorder (P = 0.0452);

MVP

0.68

MPC

0.61

ClinPred

0.88

GERP RS

5.2

PromoterAI

0.065

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.40

gMVP

0.75

Mutation Taster

=75/25

polymorphism

(source)

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

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8-23246928-A-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over