NM_000057.4(BLM):c.2974T>C (p.Phe992Leu) AND Bloom syndrome

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Jan 27, 2020
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:: RCV001363777.9

Allele description [Variation Report for NM_000057.4(BLM):c.2974T>C (p.Phe992Leu)]

NM_000057.4(BLM):c.2974T>C (p.Phe992Leu)

Gene:

BLM:BLM RecQ like helicase [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

15q26.1

Genomic location:

Preferred name:

NM_000057.4(BLM):c.2974T>C (p.Phe992Leu)

HGVS:

NC_000015.10:g.90790799T>C
NG_007272.1:g.78428T>C
NM_000057.4:c.2974T>CMANE SELECT
NM_001287246.2:c.2974T>C
NM_001287247.2:c.2974T>C
NM_001287248.2:c.1849T>C
NP_000048.1:p.Phe992Leu
NP_001274175.1:p.Phe992Leu
NP_001274176.1:p.Phe992Leu
NP_001274177.1:p.Phe617Leu
LRG_20:g.78428T>C
NC_000015.9:g.91334029T>C

Protein change:

F617L

Links:

dbSNP: rs2151184675

NCBI 1000 Genomes Browser:

rs2151184675

Molecular consequence:

NM_000057.4:c.2974T>C - missense variant - [Sequence Ontology: SO:0001583]
NM_001287246.2:c.2974T>C - missense variant - [Sequence Ontology: SO:0001583]
NM_001287247.2:c.2974T>C - missense variant - [Sequence Ontology: SO:0001583]
NM_001287248.2:c.1849T>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Bloom syndrome (BLM)
Synonyms:: Bloom-Torre-Machacek syndrome; Growth deficiency, sun-sensitive, telangiectatic, hypo and hyperpigmented skin, predisposition to malignancy and chromosomal instability
Identifiers:: MONDO: MONDO:0008876; MedGen: C0005859; Orphanet: 125; OMIM: 210900

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001559903	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jan 27, 2020)	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

SCV001559903

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jan 27, 2020)

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, SCV001559903.5

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

Description

This variant is not present in population databases (ExAC no frequency). 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. 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: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with BLM-related conditions. This sequence change replaces phenylalanine with leucine at codon 992 of the BLM protein (p.Phe992Leu). The phenylalanine residue is moderately conserved and there is a small physicochemical difference between phenylalanine and leucine.

#	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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