Genetic Variant NM_001039707.2:c.1271G>A (chr9-136402825-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001039707.2(ENTR1):c.1271G>A(p.Arg424Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,130 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R424T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 29)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

ENTR1
NM_001039707.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.76

Publications

4 publications found

Variant links:

Genes affected

ENTR1 (HGNC:10667): (endosome associated trafficking regulator 1) Involved in several processes, including endocytic recycling; positive regulation of cilium assembly; and positive regulation of protein localization to cilium. Located in endosome; microtubule organizing center; and midbody. Colocalizes with retromer complex. [provided by Alliance of Genome Resources, Apr 2022]

ENTR1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.10269514).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ENTR1	NM_001039707.2 link	c.1271G>A	p.Arg424Lys	missense_variant	Exon 10 of 10	ENST00000357365.8	NP_001034796.1	Q96C92-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ENTR1	ENST00000357365.8 link	c.1271G>A	p.Arg424Lys	missense_variant	Exon 10 of 10	5	NM_001039707.2	ENSP00000349929.3		Q96C92-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461130

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726838

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52902

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111834

Other (OTH)

AF:

0.00

AC:

AN:

60372

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 26, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1271G>A (p.R424K) alteration is located in exon 10 (coding exon 10) of the SDCCAG3 gene. This alteration results from a G to A substitution at nucleotide position 1271, causing the arginine (R) at amino acid position 424 to be replaced by a lysine (K). 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

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.0088

T;.;.

Eigen

Benign

-0.058

Eigen_PC

Benign

0.076

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.67

T;T;T

M_CAP

Benign

0.0091

MetaRNN

Benign

0.10

T;T;T

MetaSVM

Benign

-1.0

PhyloP100

1.8

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-1.1

N;N;N

REVEL

Benign

0.040

Sift

Benign

0.38

T;T;T

Sift4G

Benign

0.58

T;T;T

Polyphen

0.38

B;B;B

Vest4

0.14

MutPred

0.22

Gain of methylation at R424 (P = 0.0228);.;.;

MVP

0.25

MPC

0.018

ClinPred

0.49

GERP RS

4.0

Varity_R

0.094

gMVP

0.27

Mutation Taster

=93/7

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over