rs797044963

Variant names:

• chr13-114325706-GAC-G
• rs797044963
• NM_032436.4:c.1866_1867delCA

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_032436.4(CHAMP1):​c.1866_1867delCA​(p.Asp622GlufsTer8) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CHAMP1 NM_032436.4 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 6.13
• Publications: 4 publications found

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]

CHAMP1 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• intellectual disability, autosomal dominant 40

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• autosomal dominant non-syndromic intellectual disability

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 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. There are 18 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 13-114325706-GAC-G is Pathogenic according to our data. Variant chr13-114325706-GAC-G is described in ClinVar as Pathogenic. ClinVar VariationId is 208417.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHAMP1	NM_032436.4	c.1866_1867delCA	p.Asp622GlufsTer8	frameshift_variant	Exon 3 of 3	ENST00000361283.4	NP_115812.1
CHAMP1	NM_001164144.3	c.1866_1867delCA	p.Asp622GlufsTer8	frameshift_variant	Exon 3 of 3		NP_001157616.1
CHAMP1	NM_001164145.3	c.1866_1867delCA	p.Asp622GlufsTer8	frameshift_variant	Exon 3 of 3		NP_001157617.1
CHAMP1	XM_047430277.1	c.1866_1867delCA	p.Asp622GlufsTer8	frameshift_variant	Exon 3 of 3		XP_047286233.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHAMP1	ENST00000361283.4	c.1866_1867delCA	p.Asp622GlufsTer8	frameshift_variant	Exon 3 of 3	1	NM_032436.4	ENSP00000354730.1

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Intellectual disability, autosomal dominant 40 Pathogenic:1

Sep 03, 2015

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

intellectual disability with severe speech impairment Pathogenic:1

Aug 13, 2015

Institute of Human Genetics, University Medical Center Hamburg-Eppendorf

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		6.1
Mutation Taster		=5/195	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs797044963; hg19: chr13-115091181;