rs1553159979

Variant names:

• chr1-27551565-GC-G
• rs1553159979
• NM_001371928.1:c.550delG

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001371928.1(AHDC1):​c.550delG​(p.Ala184ProfsTer76) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: AHDC1 NM_001371928.1 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.166
• Publications: 0 publications found

Genes affected

AHDC1 (HGNC:25230): (AT-hook DNA binding motif containing 1) This gene encodes a protein containing two AT-hooks, which likely function in DNA binding. Mutations in this gene were found in individuals with Xia-Gibbs syndrome. [provided by RefSeq, Jun 2014]

AHDC1 Gene-Disease associations (from GenCC):

• AHDC1-related intellectual disability - obstructive sleep apnea - mild dysmorphism syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Illumina, ClinGen, G2P, Orphanet, Labcorp Genetics (formerly Invitae)

ENSG00000300470 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-27551565-GC-G is Pathogenic according to our data. Variant chr1-27551565-GC-G is described in ClinVar as Pathogenic. ClinVar VariationId is 559645.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371928.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AHDC1	NM_001371928.1	MANE Select	c.550delG	p.Ala184ProfsTer76	frameshift	Exon 8 of 9	NP_001358857.1	Q5TGY3
	AHDC1	NM_001029882.3		c.550delG	p.Ala184ProfsTer76	frameshift	Exon 6 of 7	NP_001025053.1	Q5TGY3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AHDC1	ENST00000673934.1	MANE Select	c.550delG	p.Ala184ProfsTer76	frameshift	Exon 8 of 9	ENSP00000501218.1	Q5TGY3
	AHDC1	ENST00000247087.10	TSL:5	c.550delG	p.Ala184ProfsTer76	frameshift	Exon 5 of 6	ENSP00000247087.4	Q5TGY3
	AHDC1	ENST00000374011.6	TSL:5	c.550delG	p.Ala184ProfsTer76	frameshift	Exon 6 of 7	ENSP00000363123.2	Q5TGY3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 55

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	AHDC1-related intellectual disability - obstructive sleep apnea - mild dysmorphism syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.17
Mutation Taster		=1/199	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: rs1553159979; hg19: chr1-27878076;