NM_000019.4(ACAT1):c.997G>C (p.Ala333Pro) AND Deficiency of acetyl-CoA acetyltransferase

Clinical significance:Pathogenic/Likely pathogenic (Last evaluated: May 5, 2019)

Review status:2 stars out of maximum of 4 stars

criteria provided, multiple submitters, no conflicts

Based on:
4 submissions [Details]
Record status:
current
Accession:
RCV000002979.8

Allele description [Variation Report for NM_000019.4(ACAT1):c.997G>C (p.Ala333Pro)]

NM_000019.4(ACAT1):c.997G>C (p.Ala333Pro)

Gene:
ACAT1:acetyl-CoA acetyltransferase 1 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
11q22.3
Genomic location:
Preferred name:
NM_000019.4(ACAT1):c.997G>C (p.Ala333Pro)
HGVS:
  • NC_000011.10:g.108144039G>C
  • NG_009888.1:g.27509G>C
  • NG_009888.2:g.32335G>C
  • NM_000019.4:c.997G>CMANE SELECT
  • NP_000010.1:p.Ala333Pro
  • LRG_1400t1:c.997G>C
  • LRG_1400:g.32335G>C
  • LRG_1400p1:p.Ala333Pro
  • NC_000011.9:g.108014766G>C
  • NM_000019.3:c.997G>C
  • P24752:p.Ala333Pro
Protein change:
A333P; ALA333PRO
Links:
UniProtKB: P24752#VAR_007505; OMIM: 607809.0014; dbSNP: rs120074147
NCBI 1000 Genomes Browser:
rs120074147
Molecular consequence:
  • NM_000019.4:c.997G>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Deficiency of acetyl-CoA acetyltransferase
Synonyms:
Alpha-methylacetoaceticaciduria; 2-methyl-3-hydroxybutyricacidemia; Mitochondrial acetoacetyl-CoA Thiolase deficiency; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0008760; MedGen: C1536500; Orphanet: 134; OMIM: 203750

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV000023137OMIMno assertion criteria providedPathogenic
(Jan 1, 1998)
germlineliterature only

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

SCV000746954Genomic Research Center,Shahid Beheshti University of Medical Sciencescriteria provided, single submitter
Pathogenic
(Dec 18, 2017)
inheritedclinical testing

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

SCV000966103Department of Pediatrics, Gifu Universitycriteria provided, single submitter
Likely pathogenic
(May 5, 2019)
germlineresearch

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

SCV001236935Invitaecriteria provided, single submitter
Pathogenic
(Apr 25, 2019)
germlineclinical testing

PubMed (4)
[See all records that cite these PMIDs]

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineyes22not providednot providedyesresearch
not providedgermlinenot providednot providednot providednot providednot providednot providedliterature only
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing
not providedinheritedyesnot providednot providednot providednot providednot providedclinical testing

Citations

PubMed

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

Mutation update on ACAT1 variants associated with mitochondrial acetoacetyl-CoA thiolase (T2) deficiency.

Abdelkreem E, Harijan RK, Yamaguchi S, Wierenga RK, Fukao T.

Hum Mutat. 2019 Oct;40(10):1641-1663. doi: 10.1002/humu.23831. Epub 2019 Jul 3. Review.

PubMed [citation]
PMID:
31268215
PMCID:
PMC6790690
See all PubMed Citations (6)

Details of each submission

From OMIM, SCV000023137.3

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedliterature only PubMed (1)

Description

In a Japanese patient (GK01) with T2 deficiency (203750), Fukao et al. (1998) identified compound heterozygous mutations in the ACAT1 gene: an ala333-to-pro (A333P) substitution on one allele and a 1-bp deletion (149delC; 607809.0016) on the other.

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

From Genomic Research Center,Shahid Beheshti University of Medical Sciences, SCV000746954.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1inheritedyesnot providednot providednot providednot providednot providednot providednot provided

From Department of Pediatrics, Gifu University, SCV000966103.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not provided2not providedyesresearch PubMed (3)
2not providednot providednot providednot providedresearch PubMed (3)
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineyesnot providednot providednot provided2not provided2not provided
2germlineyesnot providednot providednot providednot providednot providednot providednot provided

From Invitae, SCV001236935.2

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (4)

Description

This sequence change replaces alanine with proline at codon 333 of the ACAT1 protein (p.Ala333Pro). The alanine residue is weakly conserved and there is a small physicochemical difference between alanine and proline. This variant is not present in population databases (ExAC no frequency). This variant has been observed in individual(s) with beta-ketothiolase deficiency (PMID: 9744475, 28875337, Invitae). In at least one individual the data is consistent with the variant being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 2845). This variant has been reported to affect ACAT1 protein function (PMID: 7749408). For these reasons, this variant has been classified as Pathogenic.

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

Last Updated: Sep 7, 2021

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