Genetic Variant AMMECR1:p.His317del (chrX-110198570-AATG-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PM4_Supporting

The NM_015365.3(AMMECR1):c.949_951delCAT(p.His317del) variant causes a conservative inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 22)

Exomes 𝑓: 9.2e-7 ( 0 hom. 1 hem. )

Failed GnomAD Quality Control

Consequence

AMMECR1
NM_015365.3 conservative_inframe_deletion

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.46

Publications

0 publications found

Variant links:

Genes affected

AMMECR1 (HGNC:467): (AMMECR nuclear protein 1) The exact function of this gene is not known, however, submicroscopic deletion of the X chromosome including this gene, COL4A5, and FACL4 genes, result in a contiguous gene deletion syndrome, the AMME complex (Alport syndrome, mental retardation, midface hypoplasia, and elliptocytosis). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2010]

AMMECR1 Gene-Disease associations (from GenCC):

midface hypoplasia, hearing impairment, elliptocytosis, and nephrocalcinosis
Inheritance: XL Classification: STRONG, MODERATE Submitted by: Illumina, Labcorp Genetics (formerly Invitae)
Alport syndrome-intellectual disability-midface hypoplasia-elliptocytosis syndrome
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

AMMECR1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM4

Nonframeshift variant in NON repetitive region in NM_015365.3. Strenght limited to Supporting due to length of the change: 1aa.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
AMMECR1	NM_015365.3 link	c.949_951delCAT	p.His317del	conservative_inframe_deletion	Exon 6 of 6	ENST00000262844.10	NP_056180.1
AMMECR1	NM_001025580.2 link	c.838_840delCAT	p.His280del	conservative_inframe_deletion	Exon 5 of 5		NP_001020751.1
AMMECR1	NM_001171689.2 link	c.580_582delCAT	p.His194del	conservative_inframe_deletion	Exon 8 of 8		NP_001165160.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AMMECR1	ENST00000262844.10 link	c.949_951delCAT	p.His317del	conservative_inframe_deletion	Exon 6 of 6	1	NM_015365.3	ENSP00000262844.5		Q9Y4X0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000590

AC:

AN:

169460

AF XY:

0.0000181

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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

Data not reliable, filtered out with message: AS_VQSR

AF:

9.18e-7

AC:

AN:

1088907

Hom.:

AF XY:

0.00000281

AC XY:

AN XY:

355567

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

25945

American (AMR)

AF:

0.00

AC:

AN:

34062

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

18918

East Asian (EAS)

AF:

0.00

AC:

AN:

29882

South Asian (SAS)

AF:

0.0000190

AC:

AN:

52624

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40301

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4068

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

837446

Other (OTH)

AF:

0.00

AC:

AN:

45661

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Jul 03, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In-frame deletion of 1 amino acid in a non-repeat region; In silico analysis supports a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

9.5

Mutation Taster

=48/52

disease causing

(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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over