NM_032436.4:c.755C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_032436.4(CHAMP1):c.755C>T(p.Ala252Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00036 in 1,614,182 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0022 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00016 ( 2 hom. )

Consequence

CHAMP1
NM_032436.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 2.93

Publications

0 publications found

Variant links:

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

CHAMP1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0055391192).

BP6

Variant 13-114324597-C-T is Benign according to our data. Variant chr13-114324597-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 445741.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High AC in GnomAd4 at 340 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHAMP1	NM_032436.4 link	c.755C>T	p.Ala252Val	missense_variant	Exon 3 of 3	ENST00000361283.4	NP_115812.1	Q96JM3
CHAMP1	NM_001164144.3 link	c.755C>T	p.Ala252Val	missense_variant	Exon 3 of 3		NP_001157616.1	Q96JM3
CHAMP1	NM_001164145.3 link	c.755C>T	p.Ala252Val	missense_variant	Exon 3 of 3		NP_001157617.1	Q96JM3
CHAMP1	XM_047430277.1 link	c.755C>T	p.Ala252Val	missense_variant	Exon 3 of 3		XP_047286233.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHAMP1	ENST00000361283.4 link	c.755C>T	p.Ala252Val	missense_variant	Exon 3 of 3	1	NM_032436.4	ENSP00000354730.1		Q96JM3

Frequencies

GnomAD3 genomes

AF:

0.00223

AC:

339

AN:

152186

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00799

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

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:

0.000956

GnomAD2 exomes

AF:

0.000545

AC:

137

AN:

251370

AF XY:

0.000412

show subpopulations

Gnomad AFR exome

AF:

0.00828

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000165

AC:

241

AN:

1461878

Hom.:

Cov.:

AF XY:

0.000144

AC XY:

105

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.00645

AC:

216

AN:

33480

American (AMR)

AF:

0.0000894

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1112012

Other (OTH)

AF:

0.000298

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00223

AC:

340

AN:

152304

Hom.:

Cov.:

AF XY:

0.00214

AC XY:

159

AN XY:

74470

show subpopulations

African (AFR)

AF:

0.00799

AC:

332

AN:

41566

American (AMR)

AF:

0.000392

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68018

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000760

Hom.:

Bravo

AF:

0.00230

ESP6500AA

AF:

0.00409

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000733

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Dec 31, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 24, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

CHAMP1-related disorder

Benign:1

Apr 11, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.61

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.077

T;T

Eigen

Benign

-0.36

Eigen_PC

Benign

-0.20

FATHMM_MKL

Benign

0.027

LIST_S2

Benign

0.63

.;T

MetaRNN

Benign

0.0055

T;T

MetaSVM

Benign

-0.89

MutationAssessor

Benign

0.90

L;L

PhyloP100

2.9

PrimateAI

Uncertain

0.57

PROVEAN

Benign

0.57

N;.

REVEL

Benign

0.086

Sift

Benign

0.65

T;.

Sift4G

Benign

0.38

T;.

Polyphen

0.0050

B;B

Vest4

0.047

MVP

0.12

MPC

0.16

ClinPred

0.012

GERP RS

5.3

Varity_R

0.040

gMVP

0.092

Mutation Taster

=100/0

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over