16-29877418-G-C

Position:

• chr16-29877418-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001243332.2(SEZ6L2):​c.1762C>G​(p.Pro588Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,458,950 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SEZ6L2 NM_001243332.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.05

Genes affected

SEZ6L2 (HGNC:30844): (seizure related 6 homolog like 2) This gene encodes a seizure-related protein that is localized on the cell surface. The gene is located in a region of chromosome 16p11.2 that is thought to contain candidate genes for autism spectrum disorders (ASD), though there is no evidence directly implicating this gene in ASD. Increased expression of this gene has been found in lung cancers, and the protein is therefore considered to be a novel prognostic marker for lung cancer. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Aug 2011]

SEZ6L2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17581367).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SEZ6L2	NM_001243332.2	c.1762C>G	p.Pro588Ala	missense_variant	11/18	ENST00000617533.5	NP_001230261.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SEZ6L2	ENST00000617533.5	c.1762C>G	p.Pro588Ala	missense_variant	11/18	1	NM_001243332.2	ENSP00000481917.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1458950 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 725788

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000226

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

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 15, 2024

The c.1762C>G (p.P588A) alteration is located in exon 11 (coding exon 11) of the SEZ6L2 gene. This alteration results from a C to G substitution at nucleotide position 1762, causing the proline (P) at amino acid position 588 to be replaced by an alanine (A). 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	0.11
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Uncertain	23
DANN	Benign	0.93
DEOGEN2	Benign	0.040	.;.;T;.;.
Eigen	Benign	-0.19
Eigen_PC	Benign	-0.042
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.65	T;T;T;T;T
M_CAP	Benign	0.0095	T
MetaRNN	Benign	0.18	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.27	.;.;N;.;.
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	0.32	N;N;N;N;.
REVEL	Benign	0.065
Sift	Benign	0.74	T;T;T;T;.
Sift4G	Benign	0.16	T;T;T;T;T
Polyphen		0.83, 0.91	.;P;P;.;.
Vest4		0.34
MutPred		0.47		.;.;Gain of catalytic residue at P588 (P = 0.0371);.;Gain of catalytic residue at P588 (P = 0.0371);
MVP		0.38
MPC		0.36
ClinPred		0.77	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.066
gMVP		0.33

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-29888739;