chr16-89268543-C-T

Position:

• chr16-89268543-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_013275.6(ANKRD11):​c.7927G>A​(p.Glu2643Lys) variant causes a missense 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E2643D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 29)
  • Exomes 𝑓: 7.5e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ANKRD11 NM_013275.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.84

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]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a region_of_interest Important for protein degradation (size 294) in uniprot entity ANR11_HUMAN there are 36 pathogenic changes around while only 4 benign (90%) in NM_013275.6
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ANKRD11	NM_013275.6	c.7927G>A	p.Glu2643Lys	missense_variant	13/13	ENST00000301030.10
ANKRD11	NM_001256182.2	c.7927G>A	p.Glu2643Lys	missense_variant	14/14
ANKRD11	NM_001256183.2	c.7927G>A	p.Glu2643Lys	missense_variant	13/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ANKRD11	ENST00000301030.10	c.7927G>A	p.Glu2643Lys	missense_variant	13/13	5	NM_013275.6	P1
	ENST00000602042.1	n.440C>T		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 7.46e-7 AC: 1 AN: 1340614 Hom.: 0 Cov.: 22 AF XY: 0.00 AC XY: 0 AN XY: 661948

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.74e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 29

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

May 17, 2018

The E2643K variant in the ANKRD11 gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. The E2643K variant is not observed in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). The E2643K variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. We interpret E2643K as a variant of uncertain significance -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.70	D;D;.;D
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	.;.;D;D
M_CAP	Uncertain	0.14	D
MetaRNN	Uncertain	0.56	D;D;D;D
MetaSVM	Benign	-0.50	T
MutationAssessor	Benign	1.8	L;L;.;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-2.7	D;D;.;.
REVEL	Uncertain	0.33
Sift	Uncertain	0.0040	D;D;.;.
Sift4G	Uncertain	0.0040	D;D;.;.
Polyphen		1.0	D;D;.;D
Vest4		0.72
MVP		0.76
MPC		3.2
ClinPred		0.96	D
GERP RS		4.2
Varity_R		0.31
gMVP		0.95

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: rs1064796264; hg19: chr16-89334951;