20-885132-G-C

Position:

• chr20-885132-G-C

Variant summary

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

The NM_015985.4(ANGPT4):​c.781C>G​(p.Leu261Val) variant causes a missense change involving the alteration of a 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: 33)
• Consequence: ANGPT4 NM_015985.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.65

Genes affected

ANGPT4 (HGNC:487): (angiopoietin 4) Angiopoietins are proteins with important roles in vascular development and angiogenesis. All angiopoietins bind with similar affinity to an endothelial cell-specific tyrosine-protein kinase receptor. The mechanism by which they contribute to angiogenesis is thought to involve regulation of endothelial cell interactions with supporting perivascular cells. The protein encoded by this gene functions as an agonist and is an angiopoietin. [provided by RefSeq, Jul 2008]

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=0.2071499).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ANGPT4	NM_015985.4	c.781C>G	p.Leu261Val	missense_variant	4/9	ENST00000381922.5	NP_057069.1
ANGPT4	NM_001322809.2	c.781C>G	p.Leu261Val	missense_variant	4/8		NP_001309738.1
ANGPT4	XM_011529239.4	c.625C>G	p.Leu209Val	missense_variant	3/8		XP_011527541.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ANGPT4	ENST00000381922.5	c.781C>G	p.Leu261Val	missense_variant	4/9	1	NM_015985.4	ENSP00000371347	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

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

May 15, 2024

The c.781C>G (p.L261V) alteration is located in exon 4 (coding exon 4) of the ANGPT4 gene. This alteration results from a C to G substitution at nucleotide position 781, causing the leucine (L) at amino acid position 261 to be replaced by a valine (V). 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	0.098
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.53
CADD	Benign	21
DANN	Benign	0.94
DEOGEN2	Benign	0.0093	T
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.17
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.34	T
M_CAP	Benign	0.0099	T
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.0	L
MutationTaster	Benign	0.94	D;D
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-0.55	N
REVEL	Benign	0.083
Sift	Benign	0.56	T
Sift4G	Benign	0.37	T
Polyphen		0.16	B
Vest4		0.35
MutPred		0.33		Gain of MoRF binding (P = 0.0798);
MVP		0.54
MPC		0.21
ClinPred		0.39	T
GERP RS		4.7
Varity_R		0.074
gMVP		0.30

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.13		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: chr20-865775;