NM_002485.5(NBN):c.1222A>T (p.Lys408Ter) AND Microcephaly, normal intelligence and immunodeficiency

Germline classification:: Pathogenic (1 submission)
Last evaluated:: Jan 22, 2023
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:: RCV003618081.1

Allele description [Variation Report for NM_002485.5(NBN):c.1222A>T (p.Lys408Ter)]

NM_002485.5(NBN):c.1222A>T (p.Lys408Ter)

Gene:

NBN:nibrin [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

8q21.3

Genomic location:

Preferred name:

NM_002485.5(NBN):c.1222A>T (p.Lys408Ter)

HGVS:

NC_000008.11:g.89955458T>A
NG_008860.1:g.34214A>T
NM_001024688.3:c.976A>T
NM_002485.5:c.1222A>TMANE SELECT
NP_001019859.1:p.Lys326Ter
NP_002476.2:p.Lys408Ter
NP_002476.2:p.Lys408Ter
LRG_158t1:c.1222A>T
LRG_158:g.34214A>T
LRG_158p1:p.Lys408Ter
NC_000008.10:g.90967686T>A
NM_002485.4:c.1222A>T

Protein change:

K326*

Molecular consequence:

NM_001024688.3:c.976A>T - nonsense - [Sequence Ontology: SO:0001587]
NM_002485.5:c.1222A>T - nonsense - [Sequence Ontology: SO:0001587]

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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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004424429	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Pathogenic (Jan 22, 2023)	germline	clinical testing	PubMed (3) [See all records that cite these PMIDs] 9590180, 16415040, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004424429

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Pathogenic
(Jan 22, 2023)

germline

clinical testing

PubMed (3)
[See all records that cite these PMIDs]

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

Nibrin, a novel DNA double-strand break repair protein, is mutated in Nijmegen breakage syndrome.

Varon R, Vissinga C, Platzer M, Cerosaletti KM, Chrzanowska KH, Saar K, Beckmann G, Seemanová E, Cooper PR, Nowak NJ, Stumm M, Weemaes CM, Gatti RA, Wilson RK, Digweed M, Rosenthal A, Sperling K, Concannon P, Reis A.

Cell. 1998 May 1;93(3):467-76.

PubMed [citation]

PMID:: 9590180

Mild Nijmegen breakage syndrome phenotype due to alternative splicing.

Varon R, Dutrannoy V, Weikert G, Tanzarella C, Antoccia A, Stöckl L, Spadoni E, Krüger LA, di Masi A, Sperling K, Digweed M, Maraschio P.

Hum Mol Genet. 2006 Mar 1;15(5):679-89. Epub 2006 Jan 13.

PubMed [citation]

PMID:: 16415040

See all PubMed Citations (3)

Details of each submission

From Invitae, SCV004424429.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (3)

Description

For these reasons, this variant has been classified as Pathogenic. 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 creates a premature translational stop signal (p.Lys408*) in the NBN gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in NBN are known to be pathogenic (PMID: 9590180, 16415040).

#	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: Feb 28, 2024

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