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NM_000528.4(MAN2B1):c.1787T>A (p.Ile596Asn) AND Deficiency of alpha-mannosidase

Germline classification:
Uncertain significance (2 submissions)
Last evaluated:
Sep 2, 2021
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:
RCV001304549.8

Allele description [Variation Report for NM_000528.4(MAN2B1):c.1787T>A (p.Ile596Asn)]

NM_000528.4(MAN2B1):c.1787T>A (p.Ile596Asn)

Gene:
MAN2B1:mannosidase alpha class 2B member 1 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
19p13.13
Genomic location:
Preferred name:
NM_000528.4(MAN2B1):c.1787T>A (p.Ile596Asn)
HGVS:
  • NC_000019.10:g.12655737A>T
  • NG_008318.1:g.16041T>A
  • NM_000528.4:c.1787T>AMANE SELECT
  • NM_001173498.2:c.1784T>A
  • NP_000519.2:p.Ile596Asn
  • NP_001166969.1:p.Ile595Asn
  • NC_000019.9:g.12766551A>T
Protein change:
I595N
Links:
dbSNP: rs769653813
NCBI 1000 Genomes Browser:
rs769653813
Molecular consequence:
  • NM_000528.4:c.1787T>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001173498.2:c.1784T>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Deficiency of alpha-mannosidase (MANSA)
Synonyms:
Lysosomal alpha-D-mannosidase deficiency; Alpha mannosidase B deficiency; Mannosidosis, alpha B lysosomal; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0009561; MedGen: C0024748; Orphanet: 61; OMIM: 248500

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV001493836Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))
Uncertain significance
(Sep 2, 2021)
germlineclinical testing

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

SCV002086920Natera, Inc.
no assertion criteria provided
Uncertain significance
(Jun 30, 2020)
germlineclinical testing

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical 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, SCV001493836.3

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)

Description

This sequence change replaces isoleucine with asparagine at codon 596 of the MAN2B1 protein (p.Ile596Asn). The isoleucine residue is weakly conserved and there is a large physicochemical difference between isoleucine and asparagine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with MAN2B1-related conditions. 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 tolerated. 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.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

From Natera, Inc., SCV002086920.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024