rs863225074

Variant names:

• chr13-114325811-C-T
• rs863225074
• NM_032436.4:c.1969C>T

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_032436.4(CHAMP1):​c.1969C>T​(p.Gln657*) variant causes a stop gained change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CHAMP1 NM_032436.4 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 4.86

Genes affected

CHAMP1 (HGNC:20311): (chromosome alignment maintaining phosphoprotein 1) This gene encodes a zinc finger protein that functions as a regulator of chromosome segregation in mitosis. The encoded protein is required for correct alignment of chromosomes on the metaphase plate, and plays a role in maintaining the attachment of sister kinetochores to microtubules from opposite spindle poles. Mutations in this gene are associated with an autosomal dominant form of intellectual disability. [provided by RefSeq, Jul 2017]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.193 CDS is truncated, and there are 1 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 13-114325811-C-T is Pathogenic according to our data. Variant chr13-114325811-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 217916.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr13-114325811-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHAMP1	NM_032436.4	c.1969C>T	p.Gln657*	stop_gained	Exon 3 of 3	ENST00000361283.4	NP_115812.1
CHAMP1	NM_001164144.3	c.1969C>T	p.Gln657*	stop_gained	Exon 3 of 3		NP_001157616.1
CHAMP1	NM_001164145.3	c.1969C>T	p.Gln657*	stop_gained	Exon 3 of 3		NP_001157617.1
CHAMP1	XM_047430277.1	c.1969C>T	p.Gln657*	stop_gained	Exon 3 of 3		XP_047286233.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHAMP1	ENST00000361283.4	c.1969C>T	p.Gln657*	stop_gained	Exon 3 of 3	1	NM_032436.4	ENSP00000354730.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

not provided Pathogenic:1

Jan 15, 2015

Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant was de novo in an individual with clinical features similar to those of other patients previously reported in the literature with de novo alterations in this gene. -

CHAMP1-related syndrome Pathogenic:1

Aug 06, 2018

GenomeConnect - Simons Searchlight

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: provider interpretation

Submission from Simons Searchlight facilitated by GenomeConnect. Variant interpreted by the Simons Searchlight team most recently on 2018-08-06 and interpreted as Pathogenic. Variant was initially reported on 2015-01-15 by GTR ID of laboratory name 1019. The reporting laboratory might also submit to ClinVar. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	40
DANN	Uncertain	1.0
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.97
FATHMM_MKL	Pathogenic	0.99	D
Vest4		0.38
GERP RS		5.6

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: rs863225074; hg19: chr13-115091286;