NM_001386140.1(MTTP):c.2634C>G (p.Cys878Trp) AND not provided

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Sep 24, 2021
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

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:: RCV000998245.26

Allele description [Variation Report for NM_001386140.1(MTTP):c.2634C>G (p.Cys878Trp)]

NM_001386140.1(MTTP):c.2634C>G (p.Cys878Trp)

Gene:

MTTP:microsomal triglyceride transfer protein [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

4q23

Genomic location:

Preferred name:

NM_001386140.1(MTTP):c.2634C>G (p.Cys878Trp)

HGVS:

NC_000004.12:g.99622797C>G
NG_011469.1:g.63715C>G
NM_000253.4:c.2634C>G
NM_001300785.2:c.2385C>G
NM_001386140.1:c.2634C>GMANE SELECT
NP_000244.2:p.Cys878Trp
NP_001287714.2:p.Cys795Trp
NP_001373069.1:p.Cys878Trp
NC_000004.11:g.100543954C>G
NC_000004.11:g.100543954C>G

Protein change:

C795W

Links:

dbSNP: rs1358351283

NCBI 1000 Genomes Browser:

rs1358351283

Molecular consequence:

NM_000253.4:c.2634C>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001300785.2:c.2385C>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001386140.1:c.2634C>G - missense variant - [Sequence Ontology: SO:0001583]

Observations:

Condition(s)

Synonyms:: none provided
Identifiers:: MedGen: C3661900

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001154210	CeGaT Center for Human Genetics Tuebingen	criteria provided, single submitter (CeGaT Center For Human Genetics Tuebingen Variant Classification Criteria Version 2)	Uncertain significance (Jun 1, 2018)	germline	clinical testing	Citation Link,
SCV002292681	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Sep 24, 2021)	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

SCV001154210

CeGaT Center for Human Genetics Tuebingen

criteria provided, single submitter

(CeGaT Center For Human Genetics Tuebingen Variant Classification Criteria Version 2)

Uncertain significance
(Jun 1, 2018)

germline

clinical testing

Citation Link,

SCV002292681

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Sep 24, 2021)

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	yes	1	not provided	not provided	not provided	not provided	clinical testing
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. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From CeGaT Center for Human Genetics Tuebingen, SCV001154210.27

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

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

From Labcorp Genetics (formerly Invitae), Labcorp, SCV002292681.2

#	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 cysteine with tryptophan at codon 878 of the MTTP protein (p.Cys878Trp). The cysteine residue is highly conserved and there is a large physicochemical difference between cysteine and tryptophan. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with MTTP-related conditions. ClinVar contains an entry for this variant (Variation ID: 809641). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C15"). 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: Oct 20, 2024

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