chr16-89282336-G-C

Variant names:

• chr16-89282336-G-C
• rs749632782
• NM_013275.6:c.4206C>G

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_013275.6(ANKRD11):​c.4206C>G​(p.Tyr1402*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. Y1402Y) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ANKRD11 NM_013275.6 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: -0.357
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• KBG syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, G2P, Illumina, ClinGen
• congenital heart defects, multiple types

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 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 16-89282336-G-C is Pathogenic according to our data. Variant chr16-89282336-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 579848.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ANKRD11	NM_013275.6	c.4206C>G	p.Tyr1402*	stop_gained	Exon 9 of 13	ENST00000301030.10	NP_037407.4
ANKRD11	NM_001256182.2	c.4206C>G	p.Tyr1402*	stop_gained	Exon 10 of 14		NP_001243111.1
ANKRD11	NM_001256183.2	c.4206C>G	p.Tyr1402*	stop_gained	Exon 9 of 13		NP_001243112.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ANKRD11	ENST00000301030.10	c.4206C>G	p.Tyr1402*	stop_gained	Exon 9 of 13	5	NM_013275.6	ENSP00000301030.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

KBG syndrome Pathogenic:3

Feb 18, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 30, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. Loss-of-function variants in ANKRD11 are known to be pathogenic (PMID: 21782149, 25413698). This variant has been reported in an individual affected with KBG syndrome (PMID: 27667800). This variant is not present in population databases (ExAC no frequency). This sequence change creates a premature translational stop signal (p.Tyr1402*) in the ANKRD11 gene. It is expected to result in an absent or disrupted protein product. -

May 30, 2022

Institute of Human Genetics Munich, TUM University Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Pathogenic:1

May 08, 2022

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Nonsense 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 (gnomAD); This variant is associated with the following publications: (PMID: 27667800) -

Intellectual disability Pathogenic:1

Dec 01, 2017

Diagnostic Laboratory, Strasbourg University Hospital

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.24
CADD	Uncertain	24
DANN	Uncertain	0.99
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.70
FATHMM_MKL	Benign	0.24	N
PhyloP100		-0.36
Vest4		0.69
GERP RS		-2.5
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.0
Mutation Taster		=0/200	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: rs749632782; hg19: chr16-89348744;