19-45213152-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001382422.1(EXOC3L2):c.2326C>G(p.Leu776Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000384 in 1,590,206 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. L776L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00016 ( 1 hom., cov: 31)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

EXOC3L2
NM_001382422.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.154

Variant links:

Genes affected

EXOC3L2 (HGNC:30162): (exocyst complex component 3 like 2) The protein encoded by this gene is upregulated by vascular endothelial growth factor A and interacts with exocyst complex component 4. The encoded protein may be part of an exocyst complex that plays a role in cell membrane dynamics. Mutations in this gene may be associated with Alzheimer's disease. [provided by RefSeq, May 2017]

EXOC3L2 links:

MARK4 (HGNC:13538): (microtubule affinity regulating kinase 4) This gene encodes a member of the microtubule affinity-regulating kinase family. These protein kinases phosphorylate microtubule-associated proteins and regulate the transition between stable and dynamic microtubules. The encoded protein is associated with the centrosome throughout mitosis and may be involved in cell cycle control. Expression of this gene is a potential marker for cancer, and the encoded protein may also play a role in Alzheimer's disease. Pseudogenes of this gene are located on both the short and long arm of chromosome 3. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2010]

MARK4 links:

BLOC1S3 (HGNC:20914): (biogenesis of lysosomal organelles complex 1 subunit 3) This gene encodes a protein that is a component of the BLOC1 multi-subunit protein complex. This complex is necessary for the biogenesis of specialized organelles of the endosomal-lysosomal system, including platelet dense granules and melanosomes. Mutations in this gene cause Hermansky-Pudlak syndrome 8, a disease characterized by lysosomal storage defects, bleeding due to platelet storage pool deficiency, and oculocutaneous albinism. [provided by RefSeq, Jul 2008]

BLOC1S3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.030566216).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
EXOC3L2	NM_001382422.1 linkuse as main transcript	c.2326C>G	p.Leu776Val	missense_variant	12/12	ENST00000413988.3
BLOC1S3	XR_007066811.1 linkuse as main transcript	n.1527-3524G>C		intron_variant, non_coding_transcript_variant
BLOC1S3	XR_007066813.1 linkuse as main transcript	n.1499-3524G>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
EXOC3L2	ENST00000413988.3 linkuse as main transcript	c.2326C>G	p.Leu776Val	missense_variant	12/12	5	NM_001382422.1	P1
MARK4	ENST00000587566.5 linkuse as main transcript	c.-276-45837G>C		intron_variant		5
BLOC1S3	ENST00000591569.1 linkuse as main transcript	n.283-3524G>C		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000434

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000460

AC:

AN:

217492

Hom.:

AF XY:

0.00000839

AC XY:

AN XY:

119172

show subpopulations

Gnomad AFR exome

AF:

0.000671

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000358

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000250

AC:

AN:

1437912

Hom.:

Cov.:

AF XY:

0.0000238

AC XY:

AN XY:

713622

show subpopulations

Gnomad4 AFR exome

AF:

0.000551

Gnomad4 AMR exome

AF:

0.0000253

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000143

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000273

Gnomad4 OTH exome

AF:

0.0000337

GnomAD4 genome

AF:

0.000164

AC:

AN:

152294

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74458

show subpopulations

Gnomad4 AFR

AF:

0.000553

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000274

Hom.:

Bravo

AF:

0.000181

ESP6500AA

AF:

0.000457

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000578

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2024

The c.1147C>G (p.L383V) alteration is located in exon 10 (coding exon 9) of the EXOC3L2 gene. This alteration results from a C to G substitution at nucleotide position 1147, causing the leucine (L) at amino acid position 383 to be replaced by a valine (V). 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

0.069

BayesDel_addAF

Benign

-0.60

BayesDel_noAF

Benign

-0.74

Cadd

Benign

Dann

Benign

0.96

Eigen

Benign

-0.97

Eigen_PC

Benign

-0.92

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.51

T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.031

T;T

MetaSVM

Benign

-0.93

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.68

REVEL

Benign

0.021

Polyphen

0.0010

.;B

Vest4

0.044

MVP

0.068

MPC

0.12

ClinPred

0.014

GERP RS

-0.16

Varity_R

0.029

gMVP

0.60

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