NM_017777.4(MKS1):c.955G>A (p.Val319Ile) AND multiple conditions

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Jul 5, 2022
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV001366506.2

Allele description [Variation Report for NM_017777.4(MKS1):c.955G>A (p.Val319Ile)]

NM_017777.4(MKS1):c.955G>A (p.Val319Ile)

Gene:

MKS1:MKS transition zone complex subunit 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

17q22

Genomic location:

Preferred name:

NM_017777.4(MKS1):c.955G>A (p.Val319Ile)

HGVS:

NC_000017.11:g.58210983C>T
NG_013032.1:g.13623G>A
NM_001321268.2:c.346G>A
NM_001321269.2:c.955G>A
NM_001330397.2:c.955G>A
NM_017777.4:c.955G>AMANE SELECT
NP_001308197.1:p.Val116Ile
NP_001308198.1:p.Val319Ile
NP_001317326.1:p.Val319Ile
NP_060247.2:p.Val319Ile
LRG_687t2:c.925G>A
LRG_687:g.13623G>A
LRG_687p2:p.Val309Ile
NC_000017.10:g.56288344C>T
NM_017777.3:c.955G>A

Protein change:

V116I

Links:

dbSNP: rs1393510784

NCBI 1000 Genomes Browser:

rs1393510784

Molecular consequence:

NM_001321268.2:c.346G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001321269.2:c.955G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001330397.2:c.955G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_017777.4:c.955G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Familial aplasia of the vermis
Synonyms:: CEREBELLOPARENCHYMAL DISORDER IV; Joubert syndrome; Cerebelloparenchymal disorder 4; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0018772; MedGen: C0431399; Orphanet: 475; OMIM: PS213300

Name:: Meckel-Gruber syndrome
Synonyms:: DYSENCEPHALIA SPLANCHNOCYSTICA; Gruber syndrome; Dysencephalia splachnocystica
Identifiers:: MONDO: MONDO:0018921; MedGen: C0265215; OMIM: PS249000

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001562808	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jul 5, 2022)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001562808

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jul 5, 2022)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240-242.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Invitae, SCV001562808.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 319 of the MKS1 protein (p.Val319Ile). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with MKS1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1057511). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MKS1 protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: May 7, 2024

ClinVar

Relating variation to medicine