Genetic Variant ACTL7B:p.Thr219Ile (chr9-108855275-G-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_006686.4(ACTL7B):c.656C>T(p.Thr219Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000156 in 1,597,806 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

ACTL7B
NM_006686.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.919

Variant links:

Genes affected

ACTL7B (HGNC:162): (actin like 7B) 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 (ACTL7B), and related gene, ACTL7A, are intronless, and are located approximately 4 kb apart in a head-to-head orientation within the familial dysautonomia candidate region on 9q31. Based on mutational analysis of the ACTL7B gene in patients with this disorder, it was concluded that it is unlikely to be involved in the pathogenesis of dysautonomia. Unlike ACTL7A, the ACTL7B gene is expressed predominantly in the testis, however, its exact function is not known. [provided by RefSeq, Jul 2008]

ACTL7B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.048036575).

BS2

High AC in GnomAd4 at 12 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACTL7B	NM_006686.4 link	c.656C>T	p.Thr219Ile	missense_variant	Exon 1 of 1	ENST00000374667.5	NP_006677.1	Q9Y614A0A140VKC6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACTL7B	ENST00000374667.5 link	c.656C>T	p.Thr219Ile	missense_variant	Exon 1 of 1	6	NM_006686.4	ENSP00000363799.3		Q9Y614

Frequencies

GnomAD3 genomes

AF:

0.0000788

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000840

AC:

AN:

238158

Hom.:

AF XY:

0.0000770

AC XY:

AN XY:

129910

show subpopulations

Gnomad AFR exome

AF:

0.0000633

Gnomad AMR exome

AF:

0.0000291

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000221

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000117

Gnomad OTH exome

AF:

0.000168

GnomAD4 exome

AF:

0.000164

AC:

237

AN:

1445594

Hom.:

Cov.:

AF XY:

0.000160

AC XY:

115

AN XY:

719046

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000505

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000205

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000162

Hom.:

Bravo

AF:

0.0000453

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000743

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 25, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.656C>T (p.T219I) alteration is located in exon 1 (coding exon 1) of the ACTL7B gene. This alteration results from a C to T substitution at nucleotide position 656, causing the threonine (T) at amino acid position 219 to be replaced by an isoleucine (I). 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

0.14

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Benign

0.096

DEOGEN2

Benign

0.33

Eigen

Benign

-0.84

Eigen_PC

Benign

-0.79

FATHMM_MKL

Benign

0.28

LIST_S2

Benign

0.53

M_CAP

Benign

0.019

MetaRNN

Benign

0.048

MetaSVM

Benign

-0.37

MutationAssessor

Benign

0.13

PrimateAI

Benign

0.34

PROVEAN

Benign

1.3

REVEL

Benign

0.22

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.060

MVP

0.53

MPC

0.43

ClinPred

0.014

GERP RS

1.4

Varity_R

0.062

gMVP

0.44

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over