12-98751398-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001352186.2(ANKS1B):c.3704C>G(p.Ser1235Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,616 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ANKS1B NM_001352186.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.27

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 Uncertain_significance. Variant got 2 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=0.3050261).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ANKS1B	NM_001352186.2	c.3704C>G	p.Ser1235Cys	missense_variant	26/27	ENST00000683438.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ANKS1B	ENST00000683438.2	c.3704C>G	p.Ser1235Cys	missense_variant	26/27		NM_001352186.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461616 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727092

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 26, 2024

The c.3629C>G (p.S1210C) alteration is located in exon 25 (coding exon 25) of the ANKS1B gene. This alteration results from a C to G substitution at nucleotide position 3629, causing the serine (S) at amino acid position 1210 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Uncertain	0.045	T
BayesDel_noAF	Benign	-0.17
Cadd	Pathogenic	30
Dann	Uncertain	0.99
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D;D;D;D;D;D
M_CAP	Benign	0.063	D
MetaRNN	Benign	0.31	T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.26	D
MutationTaster	Benign	0.87	D;D;D;D;D;D;D;D;D;D;D;D;N
PrimateAI	Uncertain	0.55	T
PROVEAN	Uncertain	-3.5	D;D;D;D;D;D;D;D;D;D;D
REVEL	Benign	0.21
Sift	Uncertain	0.0010	D;D;D;D;D;D;D;D;D;D;D
Sift4G	Uncertain	0.0060	D;D;D;D;D;D;D;D;D;D;D
Polyphen		1.0, 1.0, 1.0, 0.94, 0.98, 0.81, 0.99	.;D;D;D;P;.;D;.;P;D;D
Vest4		0.40
MutPred		0.25		.;.;Gain of catalytic residue at P1209 (P = 0);.;.;.;.;.;.;.;.;
MVP		0.60
MPC		2.0
ClinPred		0.98	D
GERP RS		4.8
Varity_R		0.43
gMVP		0.70

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: rs2098087373; hg19: chr12-99145176;