12-51890718-C-T

Position:

• chr12-51890718-C-T

Variant summary

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

The NM_182608.4(ANKRD33):​c.772C>T​(p.His258Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,451,360 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 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: 0.0000021 (0 hom.)
• Consequence: ANKRD33 NM_182608.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.128

Genes affected

ANKRD33 (HGNC:13788): (ankyrin repeat domain 33) Predicted to be involved in negative regulation of transcription by RNA polymerase II and negative regulation of transcription regulatory region DNA binding activity. Predicted to act upstream of or within skeletal muscle cell differentiation. Predicted to be located in cytosol and nucleus. [provided by Alliance of Genome Resources, Apr 2022]

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=0.18751875).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ANKRD33	NM_182608.4	c.772C>T	p.His258Tyr	missense_variant	5/5	ENST00000301190.11	NP_872414.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ANKRD33	ENST00000301190.11	c.772C>T	p.His258Tyr	missense_variant	5/5	2	NM_182608.4	ENSP00000301190	P4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1451360 Hom.: 0 Cov.: 96 AF XY: 0.00000277 AC XY: 2 AN XY: 722482

Gnomad4 AFR exome AF: 0.0000299

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: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

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

Mar 21, 2023

The c.772C>T (p.H258Y) alteration is located in exon 5 (coding exon 5) of the ANKRD33 gene. This alteration results from a C to T substitution at nucleotide position 772, causing the histidine (H) at amino acid position 258 to be replaced by a tyrosine (Y). 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	0.10
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	19
DANN	Uncertain	0.98
Eigen	Benign	-0.45
Eigen_PC	Benign	-0.60
FATHMM_MKL	Benign	0.071	N
LIST_S2	Benign	0.74	T;T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.19	T;T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.43	T
PROVEAN	Uncertain	-2.9	D;D
REVEL	Benign	0.021
Sift	Benign	0.042	D;T
Sift4G	Uncertain	0.039	D;D
Vest4		0.29
MutPred		0.35		.;Loss of disorder (P = 0.0642);
MVP		0.46
MPC		0.51
ClinPred		0.50	D
GERP RS		-0.64
Varity_R		0.10
gMVP		0.39

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: rs1940394332; hg19: chr12-52284502;