19-32600050-C-G

Variant summary

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

The NM_032139.3(ANKRD27):c.2768G>C(p.Trp923Ser) variant causes a missense, splice region 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. 13/22 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: ANKRD27 NM_032139.3 missense, splice_region
• Scores: Splicing: ADA: 0.8589
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.61

Genes affected

ANKRD27 (HGNC:25310): (ankyrin repeat domain 27) Enables guanyl-nucleotide exchange factor activity and small GTPase binding activity. Involved in endocytic recycling and negative regulation of SNARE complex assembly. Acts upstream of or within early endosome to late endosome transport. Located in endosome; lysosome; and plasma membrane. Implicated in eosinophilic esophagitis. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.36465895).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ANKRD27	NM_032139.3	c.2768G>C	p.Trp923Ser	missense_variant, splice_region_variant	27/29	ENST00000306065.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ANKRD27	ENST00000306065.9	c.2768G>C	p.Trp923Ser	missense_variant, splice_region_variant	27/29	1	NM_032139.3	P1
ANKRD27	ENST00000587667.1	n.237G>C		non_coding_transcript_exon_variant	1/3	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

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

Jun 13, 2022

The c.2768G>C (p.W923S) alteration is located in exon 27 (coding exon 26) of the ANKRD27 gene. This alteration results from a G to C substitution at nucleotide position 2768, causing the tryptophan (W) at amino acid position 923 to be replaced by a serine (S). 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	Uncertain	0.45
BayesDel_addAF	Benign	0.0000059	T
BayesDel_noAF	Benign	-0.24
Cadd	Uncertain	24
Dann	Benign	0.97
DEOGEN2	Benign	0.021	T
Eigen	Benign	-0.024
Eigen_PC	Benign	0.17
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.84	T
MetaRNN	Benign	0.36	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	1.9	L
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-2.9	D
REVEL	Benign	0.26
Sift	Benign	0.12	T
Sift4G	Benign	0.24	T
Polyphen		0.0010	B
Vest4		0.55
MutPred		0.56		Gain of disorder (P = 3e-04);
MVP		0.77
MPC		0.32
ClinPred		0.85	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.23
gMVP		0.57

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.86
dbscSNV1_RF	Benign	0.56
SpliceAI score (max)		0.11		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-33090956;