Genetic Variant SAPCD2:p.Arg313Trp (chr9-137065080-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_178448.4(SAPCD2):c.937C>T(p.Arg313Trp) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000269 in 1,524,126 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

SAPCD2
NM_178448.4 missense, splice_region

Scores

Splicing: ADA: 0.0005640

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.18

Variant links:

Genes affected

SAPCD2 (HGNC:28055): (suppressor APC domain containing 2) Involved in negative regulation of protein localization to cell cortex and positive regulation of cell population proliferation. Located in several cellular components, including apical cortex; apical junction complex; and nuclear lumen. [provided by Alliance of Genome Resources, Apr 2022]

SAPCD2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06500754).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SAPCD2	NM_178448.4 link	c.937C>T	p.Arg313Trp	missense_variant, splice_region_variant	Exon 4 of 6	ENST00000409687.5	NP_848543.2	Q86UD0
SAPCD2	XM_011519180.4 link	c.1027C>T	p.Arg343Trp	missense_variant, splice_region_variant	Exon 5 of 7		XP_011517482.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SAPCD2	ENST00000409687.5 link	c.937C>T	p.Arg313Trp	missense_variant, splice_region_variant	Exon 4 of 6	1	NM_178448.4	ENSP00000386348.3		Q86UD0

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000828

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000401

AC:

AN:

124824

Hom.:

AF XY:

0.0000300

AC XY:

AN XY:

66594

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000452

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000226

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000262

AC:

AN:

1371988

Hom.:

Cov.:

AF XY:

0.0000296

AC XY:

AN XY:

674626

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000300

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000201

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000178

Gnomad4 OTH exome

AF:

0.0000176

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74322

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000828

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000178

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 20, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.937C>T (p.R313W) alteration is located in exon 4 (coding exon 4) of the SAPCD2 gene. This alteration results from a C to T substitution at nucleotide position 937, causing the arginine (R) at amino acid position 313 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

0.12

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Benign

-0.43

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.068

Eigen

Benign

-0.58

Eigen_PC

Benign

-0.76

FATHMM_MKL

Benign

0.042

LIST_S2

Benign

0.54

M_CAP

Benign

0.040

MetaRNN

Benign

0.065

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.1

PrimateAI

Uncertain

0.74

PROVEAN

Benign

-1.7

REVEL

Benign

0.14

Sift

Uncertain

0.011

Sift4G

Uncertain

0.0080

Polyphen

0.95

Vest4

0.38

MutPred

0.32

Loss of methylation at R313 (P = 0.0586);

MVP

0.36

MPC

0.52

ClinPred

0.26

GERP RS

0.53

Varity_R

0.093

gMVP

0.31

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00056

dbscSNV1_RF

Benign

0.034

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