12-98735616-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2 PP2 BP4_Strong

The ENST00000547776.6(ANKS1B):c.3691C>T(p.His1231Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000161 in 620,104 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000016 (0 hom.)
• Consequence: ANKS1B ENST00000547776.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0290

Genes affected

ANKS1B (HGNC:24600): (ankyrin repeat and sterile alpha motif domain containing 1B) This gene encodes a multi-domain protein that is predominantly expressed in brain and testis. This protein interacts with amyloid beta protein precursor (AbetaPP) and may have a role in normal brain development, and in the pathogenesis of Alzheimer's disease. Expression of this gene has been shown to be elevated in patients with pre-B cell acute lymphocytic leukemia associated with t(1;19) translocation. Alternatively spliced transcript variants encoding different isoforms (some with different subcellular localization, PMID:15004329) have been described for this gene. [provided by RefSeq, Aug 2011]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, ANKS1B
• BP4: Computational evidence support a benign effect (MetaRNN=0.059518665).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ANKS1B	NM_152788.4	c.3691C>T	p.His1231Tyr	missense_variant	26/26
ANKS1B	NM_001352196.2	c.1441C>T	p.His481Tyr	missense_variant	13/13
ANKS1B	NM_001352197.2	c.1369C>T	p.His457Tyr	missense_variant	12/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ANKS1B	ENST00000547776.6	c.3691C>T	p.His1231Tyr	missense_variant	26/26	1
ANKS1B	ENST00000547010.5	c.2239C>T	p.His747Tyr	missense_variant	18/18	1
ANKS1B	ENST00000549558.6	c.1189C>T	p.His397Tyr	missense_variant	11/11	1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000403 AC: 1 AN: 248006 Hom.: 0 AF XY: 0.00000743 AC XY: 1 AN XY: 134520

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000888

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000161 AC: 1 AN: 620104 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 338084

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: 0.00000291

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000828 AC: 1

Asia WGS AF: 0.000289 AC: 1 AN: 3478

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

Invitae

Jun 06, 2021

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The tyrosine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with ANKS1B-related conditions. This variant is present in population databases (rs758073552, ExAC 0.002%). This sequence change replaces histidine with tyrosine at codon 1231 of the ANKS1B protein (p.His1231Tyr). The histidine residue is weakly conserved and there is a moderate physicochemical difference between histidine and tyrosine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.090
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
Cadd	Benign	13
Dann	Benign	0.87
Eigen	Benign	-0.90
Eigen_PC	Benign	-0.86
FATHMM_MKL	Benign	0.033	N
LIST_S2	Benign	0.56	T;T;T;T
M_CAP	Benign	0.0095	T
MetaRNN	Benign	0.060	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-0.080	N;N;N;N
REVEL	Benign	0.092
Sift	Uncertain	0.0070	D;D;D;D
Sift4G	Benign	0.082	T;T;D;T
Polyphen		0.0	.;B;B;B
Vest4		0.13
MutPred		0.31		.;.;Gain of catalytic residue at H1231 (P = 0.0025);.;
MVP		0.36
MPC		1.2
ClinPred		0.059	T
GERP RS		2.1
Varity_R		0.18
gMVP		0.16

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: rs758073552; hg19: chr12-99129394;