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UniProtKB/Swiss-Prot P51659: Variant p.Asn457Tyr

Peroxisomal multifunctional enzyme type 2
Gene: HSD17B4
Variant information

Variant position:  457
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Asparagine (N) to Tyrosine (Y) at position 457 (N457Y, p.Asn457Tyr).
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 large size and aromatic (Y)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
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

Variant description:  In DBPD; the mutation leads to an unstable protein.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  457
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  736
The length of the canonical sequence.

Location on the sequence:   SGVVIIMDVYSYSEKELICH  N QFSLFLVGSGGFGGKRTSDK
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                         SGVVIIMDVYSYSEK-ELICHNQFSLFLVGSGGFGGKRTSDK

Mouse                         SGVVIVMDVYSYSGK-ELICYNQFSVFVVGSGGFGGKRTSE

Rat                           SGIVIVMDVYSYSGK-ELICYNQFSVFVVGSGGFGGKRTSE

Drosophila                    SGAVVVTNSESFDESGRLLVRNQSTTFIVGAGKFGGKK--D

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 1 – 736 Peroxisomal multifunctional enzyme type 2
Chain 312 – 736 Enoyl-CoA hydratase 2
Region 322 – 622 Enoyl-CoA hydratase 2
Beta strand 440 – 462


Literature citations

Enoyl-CoA hydratase deficiency: identification of a new type of D-bifunctional protein deficiency.
van Grunsven E.G.; Mooijer P.A.; Aubourg P.; Wanders R.J.;
Hum. Mol. Genet. 8:1509-1516(1999)
Cited for: VARIANT DBPD TYR-457; VARIANT ARG-511;

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.