chr7-100646328-C-T

Position:

• chr7-100646328-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP2 PP3_Moderate PP5_Moderate

The NM_016188.5(ACTL6B):​c.1121G>A​(p.Arg374Gln) 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 (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACTL6B NM_016188.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.57

Genes affected

ACTL6B (HGNC:160): (actin like 6B) The protein encoded by this gene is a member of a family of actin-related proteins (ARPs) which share significant amino acid sequence identity to conventional actins. Both actins and ARPs have an actin fold, which is an ATP-binding cleft, as a common feature. The ARPs are involved in diverse cellular processes, including vesicular transport, spindle orientation, nuclear migration and chromatin remodeling. This gene encodes a subunit of the BAF (BRG1/brm-associated factor) complex in mammals, which is functionally related to SWI/SNF complex in S. cerevisiae and Drosophila; the latter is thought to facilitate transcriptional activation of specific genes by antagonizing chromatin-mediated transcriptional repression. This subunit may be involved in the regulation of genes by structural modulation of their chromatin, specifically in the brain. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ACTL6B. . Gene score misZ: 3.2738 (greater than the threshold 3.09). Trascript score misZ: 3.3665 (greater than threshold 3.09). The gene has 18 curated pathogenic missense variants (we use a threshold of 10). The gene has 1 curated benign missense variants. GenCC has associacion of the gene with intellectual developmental disorder with severe speech and ambulation defects, syndromic intellectual disability, developmental and epileptic encephalopathy, 76, undetermined early-onset epileptic encephalopathy.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.905
• PP5: Variant 7-100646328-C-T is Pathogenic according to our data. Variant chr7-100646328-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1695200.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ACTL6B	NM_016188.5	c.1121G>A	p.Arg374Gln	missense_variant	13/14	ENST00000160382.10	NP_057272.1
ACTL6B	NR_134539.2	n.1232G>A		non_coding_transcript_exon_variant	13/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ACTL6B	ENST00000160382.10	c.1121G>A	p.Arg374Gln	missense_variant	13/14	1	NM_016188.5	ENSP00000160382.5
ACTL6B	ENST00000487125.1	n.683G>A		non_coding_transcript_exon_variant	6/7	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Oct 01, 2022

ACTL6B: PM2, PM6, PP2, PP3 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.24
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.90	D
Eigen	Pathogenic	0.80
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.90	D
MetaSVM	Pathogenic	0.95	D
MutationAssessor	Benign	1.9	L
PrimateAI	Pathogenic	0.83	D
PROVEAN	Uncertain	-2.8	D
REVEL	Pathogenic	0.80
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.020	D
Polyphen		1.0	D
Vest4		0.81
MutPred		0.69		Loss of MoRF binding (P = 0.0442);
MVP		0.91
MPC		2.4
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.46
gMVP		0.77

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: chr7-100243951;