UniProtKB/Swiss-Prot P24752: Variant p.Asn158Asp

Acetyl-CoA acetyltransferase, mitochondrial
Gene: ACAT1
Chromosomal location: 11q22.3-q23.1
Variant information

Variant position:  158
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants have been found in patients and disease-association is reported in literature. However, this classification is not a definitive assessment of variant pathogenicity.
  • Polymorphism: No disease-association has been reported.
  • Unclassified: Variants have been found in patients but disease-association remains unclear.

Residue change:  From Asparagine (N) to Aspartate (D) at position 158 (N158D, p.Asn158Asp).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from medium size and polar (N) to medium size and acidic (D)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  1
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Involvement in disease:  3-ketothiolase deficiency (3KTD) [MIM:203750]: An inborn error of isoleucine catabolism characterized by intermittent ketoacidotic attacks associated with unconsciousness. Some patients die during an attack or are mentally retarded. Urinary excretion of 2-methyl-3-hydroxybutyric acid, 2-methylacetoacetic acid, triglylglycine, butanone is increased. It seems likely that the severity of this disease correlates better with the environmental or acquired factors than with the ACAT1 genotype. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In 3KTD; no activity.
Any additional useful information about the variant.



Sequence information

Variant position:  158
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  427
The length of the canonical sequence.

Location on the sequence:   QSLMCGHQDVMVAGGMESMS  N VPYVMNRGSTPYGGVKLEDL
The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         QSLMCGHQDVMVAGGMESMSNVPYVM--NRGSTPYGGVKLEDL

Mouse                         QSLMCGHQDVMVAGGMESMSNVPYVM--SRGATPYGGVKLE

Rat                           QSLMCGHQDVMVAGGMESMSNVPYVM--SRGATPYGGVKLE

Bovine                        QNLMCGHQDVMVAGGMESMSNVPYVM--NRGATPYGGVKLE

Xenopus tropicalis            QSLMCGHQQVMVAGGMESMSNVPYCM--SRGATPYGGVKLE

Zebrafish                     QSLMCGHQDVMVAGGMESMSQVPYIM--AREAPPYGGVKME

Baker's yeast                 QSIKCGNADVVVAGGCESMTNAPYYMPAARAGAKFGQTVLV

Fission yeast                 QTIMTGNAEIVVAGGTESMSNAPYYAPKNRFGAKYGNVELV

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 34 – 427 Acetyl-CoA acetyltransferase, mitochondrial
Modified residue 174 – 174 N6-acetyllysine; alternate
Modified residue 174 – 174 N6-succinyllysine; alternate
Helix 156 – 158


Literature citations

Molecular, biochemical, and clinical characterization of mitochondrial acetoacetyl-coenzyme A thiolase deficiency in two further patients.
Wakazono A.; Fukao T.; Yamaguchi S.; Hori T.; Orii T.; Lambert M.; Mitchell G.A.; Lee G.W.; Hashimoto T.;
Hum. Mutat. 5:34-42(1995)
Cited for: VARIANTS 3KTD ASP-158; MET-297 AND PRO-301;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.