chr16-67184558-G-A

Position:

• chr16-67184558-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_178516.4(EXOC3L1):​c.2077C>T​(p.Arg693Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000721 in 1,386,392 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 10/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: EXOC3L1 NM_178516.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.95

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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32179615).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EXOC3L1	NM_178516.4	c.2077C>T	p.Arg693Trp	missense_variant	14/14	ENST00000314586.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EXOC3L1	ENST00000314586.11	c.2077C>T	p.Arg693Trp	missense_variant	14/14	2	NM_178516.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.21e-7 AC: 1 AN: 1386392 Hom.: 0 Cov.: 31 AF XY: 0.00000146 AC XY: 1 AN XY: 685766

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.24e-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

Dec 19, 2022

The c.2077C>T (p.R693W) alteration is located in exon 14 (coding exon 13) of the EXOC3L1 gene. This alteration results from a C to T substitution at nucleotide position 2077, causing the arginine (R) at amino acid position 693 to be replaced by a tryptophan (W). 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	0.19
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.35
CADD	Uncertain	25
DANN	Uncertain	0.99
Eigen	Uncertain	0.30
Eigen_PC	Benign	0.21
FATHMM_MKL	Benign	0.36	N
LIST_S2	Benign	0.40	T;T
M_CAP	Benign	0.071	D
MetaRNN	Benign	0.32	T;T
MetaSVM	Benign	-1.2	T
MutationTaster	Benign	0.98	D
PROVEAN	Benign	-0.87	N;N
REVEL	Benign	0.063
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	.;D
Polyphen		0.098	B;.
MutPred		0.55		Gain of sheet (P = 0.0101);.;
MVP		0.60
ClinPred		0.99	D
GERP RS		3.6

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr16-67218461;