chr16-67184970-C-T

Position:

• chr16-67184970-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_178516.4(EXOC3L1):​c.1837G>A​(p.Glu613Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000412 in 1,457,712 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: EXOC3L1 NM_178516.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.70

Genes affected

EXOC3L1 (HGNC:27540): (exocyst complex component 3 like 1) Predicted to enable SNARE binding activity. Predicted to be involved in exocyst localization; exocytosis; and peptide hormone secretion. Predicted to be located in secretory granule. Predicted to be part of exocyst. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EXOC3L1	NM_178516.4	c.1837G>A	p.Glu613Lys	missense_variant	12/14	ENST00000314586.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EXOC3L1	ENST00000314586.11	c.1837G>A	p.Glu613Lys	missense_variant	12/14	2	NM_178516.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000412 AC: 6 AN: 1457712 Hom.: 0 Cov.: 32 AF XY: 0.00000552 AC XY: 4 AN XY: 725134

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000101

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 08, 2022

The c.1837G>A (p.E613K) alteration is located in exon 12 (coding exon 11) of the EXOC3L1 gene. This alteration results from a G to A substitution at nucleotide position 1837, causing the glutamic acid (E) at amino acid position 613 to be replaced by a lysine (K). 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	0.26
BayesDel_addAF	Benign	-0.093	T
BayesDel_noAF	Benign	-0.37
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.014	T;.;.
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.24
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.86	D;T;T
M_CAP	Benign	0.017	T
MetaRNN	Uncertain	0.59	D;D;D
MetaSVM	Benign	-1.2	T
MutationAssessor	Uncertain	2.5	M;.;.
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-3.5	D;D;D
REVEL	Benign	0.16
Sift	Uncertain	0.0030	D;D;D
Sift4G	Uncertain	0.013	D;.;D
Polyphen		0.99	D;D;.
Vest4		0.38
MutPred		0.52		Gain of MoRF binding (P = 0.0017);.;.;
MVP		0.64
MPC		1.5
ClinPred		0.90	D
GERP RS		3.8
Varity_R		0.66
gMVP		0.70

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: rs1461539219; hg19: chr16-67218873;