5-87268699-G-C

Variant names:

Variant summary

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

The NM_002890.3(RASA1):c.248G>C(p.Gly83Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,459,630 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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. G83E) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

RASA1
NM_002890.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.55

Publications

1 publications found

Variant links:

Genes affected

RASA1 (HGNC:9871): (RAS p21 protein activator 1) The protein encoded by this gene is located in the cytoplasm and is part of the GAP1 family of GTPase-activating proteins. The gene product stimulates the GTPase activity of normal RAS p21 but not its oncogenic counterpart. Acting as a suppressor of RAS function, the protein enhances the weak intrinsic GTPase activity of RAS proteins resulting in the inactive GDP-bound form of RAS, thereby allowing control of cellular proliferation and differentiation. Mutations leading to changes in the binding sites of either protein are associated with basal cell carcinomas. Mutations also have been associated with hereditary capillary malformations (CM) with or without arteriovenous malformations (AVM) and Parkes Weber syndrome. Alternative splicing results in two isoforms where the shorter isoform, lacking the N-terminal hydrophobic region but retaining the same activity, appears to be abundantly expressed in placental but not adult tissues. [provided by RefSeq, May 2012]

RASA1 Gene-Disease associations (from GenCC):

capillary malformation-arteriovenous malformation 1
Inheritance: AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P
capillary malformation-arteriovenous malformation syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Parkes Weber syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Noonan syndrome
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
telangiectasia, hereditary hemorrhagic, type 1
Inheritance: AD Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

RASA1 links:

ENSG00000303897 (HGNC:):

ENSG00000303897 links:

Genome browser will be placed here

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=0.12337148).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RASA1	NM_002890.3 link	c.248G>C	p.Gly83Ala	missense_variant	Exon 1 of 25	ENST00000274376.11	NP_002881.1	P20936-1Q59GK3
RASA1	NM_022650.3 link	c.-349G>C		upstream_gene_variant			NP_072179.1	P20936-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RASA1	ENST00000274376.11 link	c.248G>C	p.Gly83Ala	missense_variant	Exon 1 of 25	1	NM_002890.3	ENSP00000274376.6		P20936-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000823

AC:

AN:

243094

AF XY:

0.0000152

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1459630

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

725980

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33462

American (AMR)

AF:

0.00

AC:

AN:

44318

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26040

East Asian (EAS)

AF:

0.00

AC:

AN:

39644

South Asian (SAS)

AF:

0.0000349

AC:

AN:

86034

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53144

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5614

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111126

Other (OTH)

AF:

0.00

AC:

AN:

60248

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Capillary malformation-arteriovenous malformation syndrome

Uncertain:1

Sep 05, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 83 of the RASA1 protein (p.Gly83Ala). This variant is present in population databases (rs755788420, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with RASA1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1445703). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Possibly Damaging". The alanine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.42

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.22

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.51

FATHMM_MKL

Benign

0.23

LIST_S2

Benign

0.71

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.12

MetaSVM

Benign

-0.92

MutationAssessor

Benign

0.0

PhyloP100

1.5

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

0.030

REVEL

Benign

0.21

Sift

Benign

0.096

Sift4G

Benign

0.30

Polyphen

0.0010

Vest4

0.17

MutPred

0.13

Gain of helix (P = 0.0199);

MVP

0.65

MPC

0.29

ClinPred

0.24

GERP RS

2.1

PromoterAI

-0.042

Neutral

(source)

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.1

Varity_R

0.037

gMVP

0.46

Mutation Taster

=90/10

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