Genetic Variant RPGRIP1L:p.Ala1101Thr (chr16-53622350-C-T) – 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_015272.5(RPGRIP1L):c.3301G>A(p.Ala1101Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000253 in 593,540 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000067 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

RPGRIP1L
NM_015272.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: -0.950

Variant links:

Genes affected

RPGRIP1L (HGNC:29168): (RPGRIP1 like) The protein encoded by this gene can localize to the basal body-centrosome complex or to primary cilia and centrosomes in ciliated cells. The encoded protein has been found to interact with nephrocystin-4. Defects in this gene are a cause of Joubert syndrome type 7 (JBTS7) and Meckel syndrome type 5 (MKS5). [provided by RefSeq, Jun 2016]

RPGRIP1L links:

Genome browser will be placed here

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=0.055591524).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RPGRIP1L	NM_015272.5 link	c.3301G>A	p.Ala1101Thr	missense_variant	Exon 23 of 27	ENST00000647211.2	NP_056087.2	Q68CZ1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RPGRIP1L	ENST00000647211.2 link	c.3301G>A	p.Ala1101Thr	missense_variant	Exon 23 of 27		NM_015272.5	ENSP00000493946.1		Q68CZ1-1

Frequencies

GnomAD3 genomes

AF:

0.00000674

AC:

AN:

148374

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000250

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000137

AC:

AN:

73014

Hom.:

AF XY:

0.0000247

AC XY:

AN XY:

40562

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000368

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000314

AC:

AN:

445166

Hom.:

Cov.:

AF XY:

0.0000337

AC XY:

AN XY:

237500

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000223

Gnomad4 FIN exome

AF:

0.0000354

Gnomad4 NFE exome

AF:

0.0000384

Gnomad4 OTH exome

AF:

0.0000783

GnomAD4 genome

AF:

0.00000674

AC:

AN:

148374

Hom.:

Cov.:

AF XY:

0.0000139

AC XY:

AN XY:

72062

show subpopulations

Gnomad4 AFR

AF:

0.0000250

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Meckel-Gruber syndrome;C0431399:Familial aplasia of the vermis

Uncertain:1

Aug 27, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine with threonine at codon 1101 of the RPGRIP1L protein (p.Ala1101Thr). The alanine residue is weakly conserved and there is a small physicochemical difference between alanine and threonine. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This variant has not been reported in the literature in individuals affected with RPGRIP1L-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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. -

RPGRIP1L-related disorder

Uncertain:1

Aug 09, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The RPGRIP1L c.3301G>A variant is predicted to result in the amino acid substitution p.Ala1101Thr. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.0037% of alleles in individuals of European (Non-Finnish) descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not provided

Uncertain:1

Jun 27, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Meckel syndrome, type 5;C1969053:Joubert syndrome 7;C5436841:COACH syndrome 3

Uncertain:1

Dec 27, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.74

CADD

Benign

1.2

DANN

Benign

0.85

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.0050

LIST_S2

Benign

0.099

.;T;T

M_CAP

Benign

0.00075

MetaRNN

Benign

0.056

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.14

N;N;.

PrimateAI

Benign

0.37

PROVEAN

Benign

0.23

.;N;N

REVEL

Benign

0.030

Sift

Benign

0.48

.;T;T

Sift4G

Benign

0.77

.;T;T

Polyphen

0.0

B;B;.

Vest4

0.069, 0.073

MutPred

0.25

Gain of glycosylation at A1101 (P = 0.0103);Gain of glycosylation at A1101 (P = 0.0103);.;

MVP

0.030

MPC

0.070

ClinPred

0.025

GERP RS

0.16

Varity_R

0.036

gMVP

0.083

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

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