6-13053373-G-A

Variant names:

• chr6-13053373-G-A
• NM_030948.6:c.259G>A

Variant summary

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

The NM_001322313.2(PHACTR1):​c.-18G>A variant causes a 5 prime UTR premature start codon gain change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,450,066 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PHACTR1 NM_001322313.2 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.12

Genes affected

PHACTR1 (HGNC:20990): (phosphatase and actin regulator 1) The protein encoded by this gene is a member of the phosphatase and actin regulator family of proteins. This family member can bind actin and regulate the reorganization of the actin cytoskeleton. It plays a role in tubule formation and in endothelial cell survival. Polymorphisms in this gene are associated with susceptibility to myocardial infarction, coronary artery disease and cervical artery dissection. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHACTR1	NM_030948.6	c.259G>A	p.Val87Met	missense_variant	Exon 5 of 15	ENST00000332995.12	NP_112210.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PHACTR1	ENST00000332995.12	c.259G>A	p.Val87Met	missense_variant	Exon 5 of 15	2	NM_030948.6	ENSP00000329880.8

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1450066 Hom.: 0 Cov.: 30 AF XY: 0.00000278 AC XY: 2 AN XY: 720530

Gnomad4 AFR exome AF: 0.0000302

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: 9.04e-7

Gnomad4 OTH exome AF: 0.0000167

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Developmental and epileptic encephalopathy, 70 Uncertain:1

May 20, 2023

Neuberg Centre For Genomic Medicine, NCGM

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The observed missense c.259G>A(p.Val87Met) variant in PHACTR1 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. This variant is absent in gnomAD Exomes. The amino acid Val at position 87 is changed to a Met changing protein sequence and it might alter its composition and physico-chemical properties. The amino acid change p.Val87Met in PHACTR1 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. Computational evidence (Polyphen - Damagin, SIFT - Tolerated, and MutationTaster - Disease causing) predicts conflicting evidence on protein structure and function for this variant. For these reasons, this variant has been classified as Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Benign	-0.069	T
BayesDel_noAF	Benign	-0.34
CADD	Uncertain	26
DANN	Benign	0.93
DEOGEN2	Benign	0.021	T;.
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Benign	0.037	D
MetaRNN	Uncertain	0.49	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-0.39	N;N
PrimateAI	Pathogenic	0.86	D
PROVEAN	Benign	-0.080	N;N
REVEL	Benign	0.28
Sift	Benign	0.64	T;T
Sift4G	Benign	0.50	T;T
Polyphen		1.0	D;D
Vest4		0.71
MutPred		0.34		Loss of loop (P = 0.0112);Loss of loop (P = 0.0112);
MVP		0.24
ClinPred		0.90	D
GERP RS		5.8
Varity_R		0.30
gMVP		0.41

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-13053605;