chr21-44330349-T-A

Variant names:

• chr21-44330349-T-A
• rs1131690800
• NM_004928.3:c.643-23A>T

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 10P and 1B. PM2 PP5_Very_Strong BP4

The NM_004928.3(CFAP410):​c.643-23A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). There are indicators that this mutation may affect the branch point..

• Frequency: Genomes: not found (cov: 34)
• Consequence: CFAP410 NM_004928.3 intron
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 0.127
• Publications: 4 publications found

Genes affected

CFAP410 (HGNC:1260): (cilia and flagella associated protein 410) Four alternatively spliced transcript variants encoding four different isoforms have been found for this nuclear gene. All isoforms contain leucine-rich repeats. Three of these isoforms are mitochondrial proteins and one of them lacks the target peptide, so is not located in mitochondrion. This gene is down-regulated in Down syndrome (DS) brain, which may represent mitochondrial dysfunction in DS patients. [provided by RefSeq, Sep 2012]

CFAP410 Gene-Disease associations (from GenCC):

• axial spondylometaphyseal dysplasia

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• amyotrophic lateral sclerosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• cone-rod dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000241728 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 21-44330349-T-A is Pathogenic according to our data. Variant chr21-44330349-T-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 428579.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP4: This position, referring to a specific DNA site, is a probable branch point but rather VUS (scored 4 / 10). The score ranges from 0 to 10, with values ≤3 considered benign and >5 classified as pathogenic. Computational evidence support a benign effect (BayesDel_noAF=-0.85). . Strength limited to SUPPORTING due to the PP5.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004928.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CFAP410	NM_004928.3	MANE Select	c.643-23A>T		intron	N/A	NP_004919.1
	CFAP410	NM_001271441.2		c.1000-23A>T		intron	N/A	NP_001258370.1
	CFAP410	NM_001271440.2		c.640-23A>T		intron	N/A	NP_001258369.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CFAP410	ENST00000339818.9	TSL:1 MANE Select	c.643-23A>T		intron	N/A	ENSP00000344566.4
	CFAP410	ENST00000397956.7	TSL:1	c.1000-23A>T		intron	N/A	ENSP00000381047.3
	CFAP410	ENST00000325223.7	TSL:1	c.640-23A>T		intron	N/A	ENSP00000317302.7

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 34

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Axial spondylometaphyseal dysplasia Pathogenic:3

Sep 09, 2019

Institute of Human Genetics Munich, TUM University Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Mar 14, 2024

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Jul 17, 2018

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	8.0
DANN	Benign	0.84
PhyloP100		0.13
La Branchor		0.94
BranchPoint Hunter		4.0
Mutation Taster		=16/84	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs1131690800; hg19: chr21-45750232;