4-82824658-G-A

Position:

• chr4-82824658-G-A

Variant summary

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

The NM_001077207.4(SEC31A):​c.3308C>T​(p.Pro1103Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SEC31A NM_001077207.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

Genes affected

SEC31A (HGNC:17052): (SEC31 homolog A, COPII coat complex component) The protein encoded by this gene shares similarity with the yeast Sec31 protein, and is a component of the outer layer of the coat protein complex II (COPII). The encoded protein is involved in vesicle budding from the endoplasmic reticulum (ER) and contains multiple WD repeats near the N-terminus and a proline-rich region in the C-terminal half. It associates with the protein encoded by the SEC13 homolog, nuclear pore and COPII coat complex component (SEC13), and is required for ER-Golgi transport. Monoubiquitylation of this protein by CUL3-KLHL12 was found to regulate the size of COPII coats to accommodate unusually shaped cargo. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Dec 2015]

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	Protein	UniProt
SEC31A	NM_001077207.4	c.3308C>T	p.Pro1103Leu	missense_variant	25/27	ENST00000395310.7	NP_001070675.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SEC31A	ENST00000395310.7	c.3308C>T	p.Pro1103Leu	missense_variant	25/27	1	NM_001077207.4	ENSP00000378721.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

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

Sep 16, 2021

The c.3308C>T (p.P1103L) alteration is located in exon 25 (coding exon 24) of the SEC31A gene. This alteration results from a C to T substitution at nucleotide position 3308, causing the proline (P) at amino acid position 1103 to be replaced by a leucine (L). 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	0.21
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.12
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Benign	0.32	.;.;T;.;.;.;T;T;.;.;T;.;.
Eigen	Uncertain	0.65
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.93	D;.;.;D;.;D;D;D;D;D;.;D;D
M_CAP	Benign	0.055	D
MetaRNN	Uncertain	0.55	D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.084	T
MutationAssessor	Uncertain	2.5	.;.;M;.;.;.;M;.;.;.;M;.;.
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-6.8	D;D;D;D;D;D;D;D;D;D;D;D;D
REVEL	Uncertain	0.50
Sift	Uncertain	0.0010	D;D;D;D;D;D;D;D;D;D;D;D;D
Sift4G	Uncertain	0.015	D;D;D;D;D;D;D;D;D;D;D;D;D
Polyphen		1.0	D;D;D;.;D;D;D;.;D;D;D;.;.
Vest4		0.60
MutPred		0.30		.;.;Loss of disorder (P = 0.0217);.;.;.;Loss of disorder (P = 0.0217);.;.;.;Loss of disorder (P = 0.0217);.;.;
MVP		0.66
MPC		0.67
ClinPred		1.0	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.57
gMVP		0.61

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: chr4-83745811;