NM_000474.4(TWIST1):c.329G>C (p.Arg110Pro) AND multiple conditions

Germline classification:: Likely pathogenic (1 submission)
Last evaluated:: Nov 27, 2018
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:: RCV000802635.6

Allele description [Variation Report for NM_000474.4(TWIST1):c.329G>C (p.Arg110Pro)]

NM_000474.4(TWIST1):c.329G>C (p.Arg110Pro)

Gene:

TWIST1:twist family bHLH transcription factor 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

7p21.1

Genomic location:

Preferred name:

NM_000474.4(TWIST1):c.329G>C (p.Arg110Pro)

HGVS:

NC_000007.14:g.19116993C>G
NG_008114.2:g.5680G>C
NM_000474.4:c.329G>CMANE SELECT
NP_000465.1:p.Arg110Pro
NC_000007.13:g.19156616C>G
NM_000474.3:c.329G>C
NR_149001.2:n.644G>C

Protein change:

R110P

Links:

dbSNP: rs1085307555

NCBI 1000 Genomes Browser:

rs1085307555

Molecular consequence:

NM_000474.4:c.329G>C - missense variant - [Sequence Ontology: SO:0001583]
NR_149001.2:n.644G>C - non-coding transcript variant - [Sequence Ontology: SO:0001619]

Condition(s)

Name:: TWIST1-related craniosynostosis (CRS1)
Synonyms:: Craniosynostosis 1
Identifiers:: MONDO: MONDO:0007399; MedGen: C4551902; Orphanet: 63440; OMIM: 123100

Name:: Saethre-Chotzen syndrome (SCS)
Synonyms:: ACS III; Acrocephalo-syndactyly, type 3; Chotzen syndrome; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0007042; MedGen: C0175699; Orphanet: 794; OMIM: 101400

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000942476	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Likely pathogenic (Nov 27, 2018)	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

SCV000942476

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Likely pathogenic
(Nov 27, 2018)

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. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000942476.3

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

Description

In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. 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 disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with TWIST1-related disease. ClinVar contains an entry for this variant (Variation ID: 426307). This variant is not present in population databases (ExAC no frequency). This sequence change replaces arginine with proline at codon 110 of the TWIST1 protein (p.Arg110Pro). The arginine residue is highly conserved and there is a moderate physicochemical difference between arginine and proline.

#	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: Sep 29, 2024

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