Genetic Variant NM_020762.4:c.760G>A (chr12-64043534-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_020762.4(SRGAP1):c.760G>A(p.Val254Ile) variant causes a missense change. The variant allele was found at a frequency of 0.0000116 in 1,460,308 control chromosomes in the GnomAD database, with no homozygous occurrence. There is a variant allele frequency bias in the population database for this variant (GnomAdExome4), which may indicate mosaicism or somatic mutations in the reference population data. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

SRGAP1
NM_020762.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.76

Publications

0 publications found

Variant links:

Genes affected

SRGAP1 (HGNC:17382): (SLIT-ROBO Rho GTPase activating protein 1) The protein encoded by this gene is a GTPase activator, working with the GTPase CDC42 to negatively regulate neuronal migration. The encoded protein interacts with the transmembrane receptor ROBO1 to inactivate CDC42. [provided by RefSeq, Sep 2016]

SRGAP1 Gene-Disease associations (from GenCC):

thyroid cancer, nonmedullary, 2
Inheritance: AD Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

SRGAP1 links:

ENSG00000255886 (HGNC:):

ENSG00000255886 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.16056809).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SRGAP1	NM_020762.4 link	c.760G>A	p.Val254Ile	missense_variant	Exon 6 of 22	ENST00000355086.8	NP_065813.1	Q7Z6B7-1
SRGAP1	NM_001346201.2 link	c.760G>A	p.Val254Ile	missense_variant	Exon 6 of 22		NP_001333130.1	Q7Z6B7-2
SRGAP1	XM_024449096.2 link	c.760G>A	p.Val254Ile	missense_variant	Exon 6 of 14		XP_024304864.1
SRGAP1	XM_024449097.2 link	c.760G>A	p.Val254Ile	missense_variant	Exon 6 of 12		XP_024304865.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SRGAP1	ENST00000355086.8 link	c.760G>A	p.Val254Ile	missense_variant	Exon 6 of 22	1	NM_020762.4	ENSP00000347198.3		Q7Z6B7-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.0000116

AC:

AN:

1460308

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726454

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:

33428

American (AMR)

AF:

0.00

AC:

AN:

44526

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26110

East Asian (EAS)

AF:

0.00

AC:

AN:

39562

South Asian (SAS)

AF:

0.00

AC:

AN:

86062

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53356

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.0000153

AC:

AN:

1111186

Other (OTH)

AF:

0.00

AC:

AN:

60320

⚠️ 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: 0.390

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 provided

Uncertain:1

Aug 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

SRGAP1: PM2 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.44

CADD

Benign

(source)

DANN

Benign

0.81

DEOGEN2

Benign

0.041

T;T;T

Eigen

Benign

-0.061

Eigen_PC

Benign

0.17

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.91

D;D;.

M_CAP

Benign

0.0084

MetaRNN

Benign

0.16

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.1

L;.;.

PhyloP100

4.8

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

-0.18

N;.;N

REVEL

Benign

0.079

Sift

Benign

0.65

T;.;T

Sift4G

Benign

0.96

T;T;T

Polyphen

0.0010

B;B;B

Vest4

0.38

MutPred

0.33

Gain of ubiquitination at K256 (P = 0.078);.;.;

MVP

0.38

MPC

0.19

ClinPred

0.34

GERP RS

5.6

Varity_R

0.076

gMVP

0.32

Mutation Taster

=94/6

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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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NM_020762.4:c.760G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over