Variant 9-136377715-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_003086.4(SNAPC4):c.4112C>T(p.Ala1371Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000242 in 1,608,906 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00026 ( 0 hom. )

Consequence

SNAPC4
NM_003086.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.87

Variant links:

Genes affected

SNAPC4 (HGNC:11137): (small nuclear RNA activating complex polypeptide 4) This gene encodes the largest subunit of the small nuclear RNA-activating protein (SNAP) complex. The encoded protein contains a Myb DNA-binding domain, and is essential for RNA polymerase II and III polymerase transcription from small nuclear RNA promoters. A mutation in this gene is associated with ankylosing spondylitis. [provided by RefSeq, Jul 2016]

SNAPC4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0575673).

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000118 (18/152174) while in subpopulation NFE AF= 0.00025 (17/68020). AF 95% confidence interval is 0.000159. There are 0 homozygotes in gnomad4. There are 6 alleles in male gnomad4 subpopulation. Median coverage is 34. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SNAPC4	NM_003086.4 link	c.4112C>T	p.Ala1371Val	missense_variant	22/24	ENST00000684778.1	NP_003077.2	Q5SXM2A0A024R8F4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SNAPC4	ENST00000684778.1 link	c.4112C>T	p.Ala1371Val	missense_variant	22/24		NM_003086.4	ENSP00000510559.1		Q5SXM2

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.000250

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000118

AC:

AN:

245270

Hom.:

AF XY:

0.000135

AC XY:

AN XY:

133506

show subpopulations

Gnomad AFR exome

AF:

0.0000634

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000255

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000255

AC:

372

AN:

1456732

Hom.:

Cov.:

AF XY:

0.000240

AC XY:

174

AN XY:

724096

show subpopulations

Gnomad4 AFR exome

AF:

0.000120

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000385

Gnomad4 NFE exome

AF:

0.000309

Gnomad4 OTH exome

AF:

0.000366

GnomAD4 genome

AF:

0.000118

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.000250

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000248

Hom.:

Bravo

AF:

0.000178

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000466

AC:

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000475

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 19, 2023

The c.4112C>T (p.A1371V) alteration is located in exon 21 (coding exon 21) of the SNAPC4 gene. This alteration results from a C to T substitution at nucleotide position 4112, causing the alanine (A) at amino acid position 1371 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

0.11

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.010

Eigen

Benign

-0.43

Eigen_PC

Benign

-0.43

FATHMM_MKL

Benign

0.58

LIST_S2

Benign

0.66

M_CAP

Benign

0.010

MetaRNN

Benign

0.058

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.3

PrimateAI

Benign

0.35

PROVEAN

Benign

-0.93

REVEL

Benign

0.028

Sift

Benign

0.42

Sift4G

Uncertain

0.019

Polyphen

0.14

Vest4

0.066

MVP

0.25

ClinPred

0.031

GERP RS

3.0

Varity_R

0.033

gMVP

0.15

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