16-89646373-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_002768.5(CHMP1A):c.569+154G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0185 in 152,304 control chromosomes in the GnomAD database, including 54 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: 𝑓 0.019 (54 hom., cov: 33)
• Consequence: CHMP1A NM_002768.5 intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -2.10

Genes affected

CHMP1A (HGNC:8740): (charged multivesicular body protein 1A) This gene encodes a member of the CHMP/Chmp family of proteins which are involved in multivesicular body sorting of proteins to the interiors of lysosomes. The initial prediction of the protein sequence encoded by this gene suggested that the encoded protein was a metallopeptidase. The nomenclature has been updated recently to reflect the correct biological function of this encoded protein. Several transcripts encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 16-89646373-C-T is Benign according to our data. Variant chr16-89646373-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 1205341.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0505 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHMP1A	NM_002768.5	c.569+154G>A		intron_variant		ENST00000397901.8
CHMP1A	NM_001083314.4	c.549+154G>A		intron_variant
CHMP1A	XM_047434195.1	c.377+154G>A		intron_variant
CHMP1A	NR_046418.3	n.857+154G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHMP1A	ENST00000397901.8	c.569+154G>A		intron_variant		1	NM_002768.5	P1

Frequencies

GnomAD3 genomes AF: 0.0185 AC: 2813 AN: 152186 Hom.: 53 Cov.: 33

Gnomad AFR AF: 0.0522

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00818

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00207

Gnomad FIN AF: 0.00828

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.00570

Gnomad OTH AF: 0.0177

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0185 AC: 2822 AN: 152304 Hom.: 54 Cov.: 33 AF XY: 0.0176 AC XY: 1312 AN XY: 74474

Gnomad4 AFR AF: 0.0523

Gnomad4 AMR AF: 0.00810

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00207

Gnomad4 FIN AF: 0.00828

Gnomad4 NFE AF: 0.00570

Gnomad4 OTH AF: 0.0175

Alfa AF: 0.0134 Hom.: 4

Bravo AF: 0.0199

Asia WGS AF: 0.00664 AC: 23 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Aug 14, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
Cadd	Benign	0.13
Dann	Benign	0.79

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

LitVar

Other links and lift over

dbSNP: rs115187185; hg19: chr16-89712781;