Genetic Variant RIT1:p.Asp216His (chr1-155900402-C-G) – 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_006912.6(RIT1):c.646G>C(p.Asp216His) 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 1,461,094 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D216N) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

RIT1
NM_006912.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.57

Publications

0 publications found

Variant links:

Genes affected

RIT1 (HGNC:10023): (Ras like without CAAX 1) This gene encodes a member of a subfamily of Ras-related GTPases. The encoded protein is involved in regulating p38 MAPK-dependent signaling cascades related to cellular stress. This protein also cooperates with nerve growth factor to promote neuronal development and regeneration. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Feb 2012]

RIT1 Gene-Disease associations (from GenCC):

Noonan syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
Noonan syndrome 8
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia, Genomics England PanelApp

RIT1 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=0.12411603).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RIT1	NM_006912.6 link	c.646G>C	p.Asp216His	missense_variant	Exon 6 of 6	ENST00000368323.8	NP_008843.1	Q92963-1
RIT1	NM_001256821.2 link	c.697G>C	p.Asp233His	missense_variant	Exon 6 of 6		NP_001243750.1	Q92963-3
RIT1	NM_001256820.2 link	c.538G>C	p.Asp180His	missense_variant	Exon 5 of 5		NP_001243749.1	Q92963-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RIT1	ENST00000368323.8 link	c.646G>C	p.Asp216His	missense_variant	Exon 6 of 6	1	NM_006912.6	ENSP00000357306.3		Q92963-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461094

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726934

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33444

American (AMR)

AF:

0.00

AC:

AN:

44672

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86238

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111378

Other (OTH)

AF:

0.0000166

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Benign

-0.040

BayesDel_noAF

Benign

-0.30

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.21

T;.;.

Eigen

Benign

-0.20

Eigen_PC

Benign

0.012

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.88

D;D;D

M_CAP

Benign

0.012

MetaRNN

Benign

0.12

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.34

N;.;.

PhyloP100

3.6

PrimateAI

Uncertain

0.71

PROVEAN

Benign

0.22

N;N;N

REVEL

Benign

0.13

Sift

Benign

0.12

T;T;T

Sift4G

Benign

0.13

T;T;T

Polyphen

0.0

B;.;.

Vest4

0.39

MutPred

0.13

Loss of helix (P = 0.0626);.;.;

MVP

0.55

MPC

0.92

ClinPred

0.56

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.2

Varity_R

0.091

gMVP

0.61

Mutation Taster

=51/49

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

Computational scores

Splicing

Publications

Other links and lift over