7-5529165-G-C

Variant names:

• chr7-5529165-G-C
• NM_001101.5:c.359C>G

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PM5 PP2 PP3_Moderate

The NM_001101.5(ACTB):​c.359C>G​(p.Thr120Ser) 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 Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T120I) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ACTB NM_001101.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.81

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 Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a helix (size 12) in uniprot entity ACTB_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_001101.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-5529165-G-A is described in Lovd as [Pathogenic].
• PP2: Missense variant in the ACTB gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 94 curated pathogenic missense variants (we use a threshold of 10). The gene has 13 curated benign missense variants. Trascript score misZ: 7.6852 (above the threshold of 3.09). GenCC associations: The gene is linked to 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, 0.932

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACTB	NM_001101.5	c.359C>G	p.Thr120Ser	missense_variant	Exon 3 of 6	ENST00000646664.1	NP_001092.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACTB	ENST00000646664.1	c.359C>G	p.Thr120Ser	missense_variant	Exon 3 of 6		NM_001101.5	ENSP00000494750.1

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 provided Uncertain:1

Oct 11, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); Missense variants in this gene are often considered pathogenic (HGMD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.81
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	27
DANN	Benign	0.91
DEOGEN2	Pathogenic	0.89	D;D;D;.;.;D
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.89	.;.;D;D;D;D
M_CAP	Pathogenic	0.70	D
MetaRNN	Pathogenic	0.93	D;D;D;D;D;D
MetaSVM	Uncertain	0.76	D
MutationAssessor	Pathogenic	3.1	M;M;M;.;.;.
PrimateAI	Pathogenic	0.80	T
PROVEAN	Uncertain	-2.9	D;.;.;.;.;D
REVEL	Pathogenic	0.66
Sift4G	Uncertain	0.014	D;.;.;.;.;.
Polyphen		0.0	B;B;B;.;.;.
Vest4		0.95
MutPred		0.85		Gain of disorder (P = 0.0732);Gain of disorder (P = 0.0732);Gain of disorder (P = 0.0732);Gain of disorder (P = 0.0732);Gain of disorder (P = 0.0732);Gain of disorder (P = 0.0732);
MVP		0.94
MPC		2.9
ClinPred		0.99	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.96
gMVP		0.89

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: chr7-5568796;