7-5527863-G-A

Position:

• chr7-5527863-G-A

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PP2 PP3_Strong PP5

The NM_001101.5(ACTB):​c.1013C>T​(p.Ser338Phe) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. S338S) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACTB NM_001101.5 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.63

Genes affected

ACTB (HGNC:132): (actin beta) This gene encodes one of six different actin proteins. Actins are highly conserved proteins that are involved in cell motility, structure, integrity, and intercellular signaling. The encoded protein is a major constituent of the contractile apparatus and one of the two nonmuscle cytoskeletal actins that are ubiquitously expressed. Mutations in this gene cause Baraitser-Winter syndrome 1, which is characterized by intellectual disability with a distinctive facial appearance in human patients. Numerous pseudogenes of this gene have been identified throughout the human genome. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_001101.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ACTB. . Trascript score misZ 7.6852 (greater than threshold 3.09). GenCC has associacion of gene with ACTB-associated syndromic thrombocytopenia, Baraitser-Winter cerebrofrontofacial syndrome, developmental malformations-deafness-dystonia syndrome, Baraitser-Winter syndrome 1.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.968
• PP5: Variant 7-5527863-G-A is Pathogenic according to our data. Variant chr7-5527863-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 438273.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACTB	NM_001101.5	c.1013C>T	p.Ser338Phe	missense_variant	6/6	ENST00000646664.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACTB	ENST00000646664.1	c.1013C>T	p.Ser338Phe	missense_variant	6/6		NM_001101.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Baraitser-Winter syndrome 1 Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Molecular Genetics Laboratory, BC Children's and BC Women's Hospitals

Nov 24, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Pathogenic	0.55
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.96	D;D;D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.96
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	.;.;D
M_CAP	Pathogenic	0.51	D
MetaRNN	Pathogenic	0.97	D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.6	H;H;H
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-3.5	D;.;.
REVEL	Pathogenic	0.94
Sift4G	Pathogenic	0.0	D;.;.
Polyphen		1.0	D;D;D
Vest4		0.97
MutPred		0.79		Loss of phosphorylation at S338 (P = 0.0468);Loss of phosphorylation at S338 (P = 0.0468);Loss of phosphorylation at S338 (P = 0.0468);
MVP		0.99
MPC		3.4
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.95
gMVP		1.0

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: rs1554329113; hg19: chr7-5567494; COSMIC: COSV100079965; COSMIC: COSV100079965;