chr9-98768171-G-T

Position:

• chr9-98768171-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_173551.5(ANKS6):​c.2052C>A​(p.Ser684Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ANKS6 NM_173551.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.49

Genes affected

ANKS6 (HGNC:26724): (ankyrin repeat and sterile alpha motif domain containing 6) This gene encodes a protein containing multiple ankyrin repeats and a SAM domain. It is thought that this protein may localize to the proximal region of the primary cilium, and may play a role in renal and cardiovascular development. Mutations in this gene have been shown to cause a form of nephronophthisis (NPHP16), a chronic tubulo-interstitial nephritis. [provided by RefSeq, Jul 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12723705).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ANKS6	NM_173551.5	c.2052C>A	p.Ser684Arg	missense_variant	11/15	ENST00000353234.5	NP_775822.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ANKS6	ENST00000353234.5	c.2052C>A	p.Ser684Arg	missense_variant	11/15	1	NM_173551.5	ENSP00000297837	P1
ANKS6	ENST00000375019.6	c.1149C>A	p.Ser383Arg	missense_variant	10/15	5		ENSP00000364159
ANKS6	ENST00000444472.5	c.459C>A	p.Ser153Arg	missense_variant	4/9	2		ENSP00000398648
ANKS6	ENST00000634393.1	n.1152C>A		non_coding_transcript_exon_variant	9/15	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nephronophthisis 16 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 30, 2017

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: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine 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 ANKS6-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces serine with arginine at codon 684 of the ANKS6 protein (p.Ser684Arg). The serine residue is moderately conserved and there is a moderate physicochemical difference between serine and arginine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.016	.;T
Eigen	Benign	-0.10
Eigen_PC	Benign	0.063
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Benign	0.71	T;T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.13	T;T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	1.3	.;L
MutationTaster	Benign	0.94	N;N;N;N
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-1.4	N;N
REVEL	Benign	0.060
Sift	Benign	0.39	T;T
Sift4G	Benign	0.11	T;T
Polyphen		0.0020	.;B
Vest4		0.25
MutPred		0.12		.;Loss of phosphorylation at S684 (P = 0.0118);
MVP		0.71
MPC		0.12
ClinPred		0.30	T
GERP RS		4.0
Varity_R		0.060
gMVP		0.29

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: rs1554742278; hg19: chr9-101530453;