VCV001710418.5 - ClinVar

NM_004699.4(FAM50A):c.634C>T (p.Arg212Trp)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(2)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Conflicting classifications of pathogenicity
Likely pathogenic(1); Uncertain significance(1)

criteria provided, conflicting classifications

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_004699.4(FAM50A):c.634C>T (p.Arg212Trp)

Variation ID: 1710418 Accession: VCV001710418.5

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: Xq28 X: 154448940 (GRCh38) [ NCBI UCSC ] X: 153677288 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Oct 22, 2022	Jan 26, 2024	Mar 7, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_004699.4:c.634C>T MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_004690.1:p.Arg212Trp	missense
NC_000023.11:g.154448940C>T
NC_000023.10:g.153677288C>T
NG_013233.2:g.9801C>T

Protein change

R212W

Other names

Canonical SPDI

NC_000023.11:154448939:C:T

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
FAM50A		-	-	GRCh38 GRCh37	49	278

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
not provided	Uncertain significance (1)	criteria provided, single submitter	Sep 27, 2022	RCV002291425.3
Armfield syndrome	Likely pathogenic (1)	criteria provided, single submitter	Mar 7, 2023	RCV003151890.2

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Sep 27, 2022)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Not provided Affected status: yes Allele origin: somatic	Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center Accession: SCV002583723.1 First in ClinVar: Oct 22, 2022 Last updated: Oct 22, 2022	Comment: PM2, PP2, PP3
Likely pathogenic (Mar 07, 2023)	criteria provided, single submitter (ACMG Guidelines 2015) Method: in vivo	Armfield syndrome (X-linked inheritance) Affected status: yes Allele origin: maternal	Cytogenetique et Genetique Moleculaire, CHU Besancon Accession: SCV003840937.2 First in ClinVar: Mar 18, 2023 Last updated: Jan 26, 2024	Publications: PubMed (1) PubMed: 32703943 Comment: Patient is presenting a speech delay, behavior and feeding disorders, a global developemental delay associated with autistic spectrum trouble and a cryptorchidism. This hemizygous maternally … (more) Patient is presenting a speech delay, behavior and feeding disorders, a global developemental delay associated with autistic spectrum trouble and a cryptorchidism. This hemizygous maternally inherited missense is present in FAM50A linked to an intellectual developmental disorder, X-linked syndromic, Armfield type (OMIM 300261) A functionnal study on zebrafish (Cheol-Hee Kim,Ph.D, Professor - Department of Biology, Chungnam National University, Daejeon 305-764, Korea) has shown the mutation has "hypomorphic activity and could be pathogenic". This allowed us to classify it to a class IV ACMG variation adding a functional effect. (less) Number of individuals with the variant: 1

Comment:

Patient is presenting a speech delay, behavior and feeding disorders, a global developemental delay associated with autistic spectrum trouble and a cryptorchidism. This hemizygous maternally inherited missense is present in FAM50A linked to an intellectual developmental disorder, X-linked syndromic, Armfield type (OMIM 300261) A functionnal study on zebrafish (Cheol-Hee Kim,Ph.D, Professor - Department of Biology, Chungnam National University, Daejeon 305-764, Korea) has shown the mutation has "hypomorphic activity and could be pathogenic". This allowed us to classify it to a class IV ACMG variation adding a functional effect.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
Mutations in FAM50A suggest that Armfield XLID syndrome is a spliceosomopathy.	Lee YR	Nature communications	2020	PMID: 32703943

Text-mined citations for this variant ...

Record last updated Jan 26, 2024

ClinVar Genomic variation as it relates to human health

NM_004699.4(FAM50A):c.634C>T (p.Arg212Trp)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...