rs1064794330

Positions:

• chr16-89283314-CCTTT-C

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_013275.6(ANKRD11):​c.3224_3227delAAAG​(p.Glu1075fs) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ANKRD11 NM_013275.6 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:7
• Conservation: PhyloP100: 6.74

Genes affected

ANKRD11 (HGNC:21316): (ankyrin repeat domain containing 11) This locus encodes an ankryin repeat domain-containing protein. The encoded protein inhibits ligand-dependent activation of transcription. Mutations in this gene have been associated with KBG syndrome, which is characterized by macrodontia, distinctive craniofacial features, short stature, skeletal anomalies, global developmental delay, seizures and intellectual disability. Alternatively spliced transcript variants have been described. Related pseudogenes exist on chromosomes 2 and X. [provided by RefSeq, Jan 2012]

ANKRD11 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 18 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 16-89283314-CCTTT-C is Pathogenic according to our data. Variant chr16-89283314-CCTTT-C is described in ClinVar as [Pathogenic]. Clinvar id is 420179.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ANKRD11	NM_013275.6	c.3224_3227delAAAG	p.Glu1075fs	frameshift_variant	9/13	ENST00000301030.10	NP_037407.4
ANKRD11	NM_001256182.2	c.3224_3227delAAAG	p.Glu1075fs	frameshift_variant	10/14		NP_001243111.1
ANKRD11	NM_001256183.2	c.3224_3227delAAAG	p.Glu1075fs	frameshift_variant	9/13		NP_001243112.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ANKRD11	ENST00000301030.10	c.3224_3227delAAAG	p.Glu1075fs	frameshift_variant	9/13	5	NM_013275.6	ENSP00000301030.4

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:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

KBG syndrome Pathogenic:5

Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 15, 2023	This sequence change creates a premature translational stop signal (p.Glu1075Glyfs*242) in the ANKRD11 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ANKRD11 are known to be pathogenic (PMID: 21782149, 25125236, 25413698, 25652421). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with KBG syndrome (PMID: 28250421, 29453417). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 420179). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Autoinflammatory diseases unit, CHU de Montpellier	Jan 21, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Human Genetics, University of Leipzig Medical Center	Sep 10, 2019	This variant was identified as de novo (maternity and paternity confirmed). -
Pathogenic, criteria provided, single submitter	clinical testing	Genome Medicine, Institute for Basic Research in Developmental Disabilities	-	KBG syndrome -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Sep 01, 2017	This frameshift mutation is categorized as deleterious according to ACMG guidelines (PMID:18414213). It was found once in our laboratory in an 8-year-old female with bipolar, PDD, ADHD, failure to thrive, leg length discrepancy, spondylolisthesis, dysmorphic features. Inherited from mother with psychiatric issues. -

not provided Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Dec 07, 2021	Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 29258554, 28250421, 29453417, 25326635, 32476269) -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2022	ANKRD11: PVS1, PM2 -

Computational scores

Source: dbNSFP v4.3

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

LitVar

Other links and lift over

dbSNP: rs1064794330; hg19: chr16-89349722;