NM_002485.5(NBN):c.662T>C (p.Ile221Thr) AND Microcephaly, normal intelligence and immunodeficiency

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Mar 14, 2023
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:: RCV001208269.13

Allele description [Variation Report for NM_002485.5(NBN):c.662T>C (p.Ile221Thr)]

NM_002485.5(NBN):c.662T>C (p.Ile221Thr)

Gene:

NBN:nibrin [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

8q21.3

Genomic location:

Preferred name:

NM_002485.5(NBN):c.662T>C (p.Ile221Thr)

HGVS:

NC_000008.11:g.89971213A>G
NG_008860.1:g.18459T>C
NM_001024688.3:c.416T>C
NM_002485.5:c.662T>CMANE SELECT
NP_001019859.1:p.Ile139Thr
NP_002476.2:p.Ile221Thr
NP_002476.2:p.Ile221Thr
LRG_158t1:c.662T>C
LRG_158:g.18459T>C
LRG_158p1:p.Ile221Thr
NC_000008.10:g.90983441A>G
NM_002485.4:c.662T>C

Protein change:

I139T

Links:

dbSNP: rs1187082186

NCBI 1000 Genomes Browser:

rs1187082186

Molecular consequence:

NM_001024688.3:c.416T>C - missense variant - [Sequence Ontology: SO:0001583]
NM_002485.5:c.662T>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Microcephaly, normal intelligence and immunodeficiency (NBS)
Synonyms:: IMMUNODEFICIENCY, MICROCEPHALY, AND CHROMOSOMAL INSTABILITY; SEEMANOVA SYNDROME II; Nijmegen breakage syndrome; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0009623; MedGen: C0398791; Orphanet: 647; OMIM: 251260

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essv16109678 (0)
SRA
D,D-transpeptidase PbpB [Mycobacterium tuberculosis]
D,D-transpeptidase PbpB [Mycobacterium tuberculosis]
gi|2743225128|ref|WP_349549070.1|

Protein
histone-like protein Hns [Mycobacterium tuberculosis]
histone-like protein Hns [Mycobacterium tuberculosis]
gi|2743225120|ref|WP_349549062.1|

Protein

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001379648	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Mar 14, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV002044820	Genome-Nilou Lab	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Nov 7, 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

SCV001379648

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Mar 14, 2023)

germline

clinical testing

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

SCV002044820

Genome-Nilou Lab

criteria provided, single submitter

(ACMG Guidelines, 2015)

Uncertain significance
(Nov 7, 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	no	not provided	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

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee..

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV001379648.5

#	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 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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 490059). This variant has not been reported in the literature in individuals affected with NBN-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 221 of the NBN protein (p.Ile221Thr).

#	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

From Genome-Nilou Lab, SCV002044820.1

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

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	no	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Nov 10, 2024

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