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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P49748: Variant p.Arg450His

Very long-chain specific acyl-CoA dehydrogenase, mitochondrial
Gene: ACADVL
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Variant information Variant position: help 450 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Arginine (R) to Histidine (H) at position 450 (R450H, p.Arg450His). 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: help Change from large size and basic (R) to medium size and polar (H) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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: help In ACADVLD. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 450 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 655 The length of the canonical sequence.
Location on the sequence: help TDECIQIMGGMGFMKEPGVE R VLRDLRIFRIFEGTNDILRL 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         TDECIQIMGGMGFMKEPGVERVLRDLRIFRIFEGTNDILRL

Mouse                         ADECIQIMGGMGFMKEPGVERVLRDIRIFRIFEGANDILRL

Rat                           TDECIQIMGGMGFMKEPGVERVLRDIRIFRIFEGTNDILRL

Bovine                        TDECIQIMGGMGFMKEPGVERVLRDLRIFRIFEGTNDILRL
Sequence annotation in neighborhood: help 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 41 – 655 Very long-chain specific acyl-CoA dehydrogenase, mitochondrial
Region 41 – 482 Catalytic
Active site 462 – 462 Proton acceptor
Mutagenesis 458 – 458 F -> T. Decreased acyl-CoA dehydrogenase activity. Decreased affinity for acyl-CoA. No effect on FAD cofactor-binding.
Mutagenesis 458 – 458 F -> V. Loss of acyl-CoA dehydrogenase activity. Loss of FAD cofactor-binding.
Mutagenesis 458 – 458 F -> Y. Decreased acyl-CoA dehydrogenase activity. No effect on affinity for acyl-CoA. Decreased FAD cofactor-binding.
Mutagenesis 462 – 462 E -> D. Decreased acyl-CoA dehydrogenase activity. No effect on affinity for acyl-CoA. No effect on FAD cofactor-binding.
Mutagenesis 462 – 462 E -> Q. Loss of acyl-CoA dehydrogenase activity. No effect on FAD cofactor-binding.
Helix 448 – 455



Literature citations
Clear correlation of genotype with disease phenotype in very-long-chain acyl-CoA dehydrogenase deficiency.
Andresen B.S.; Olpin S.; Poorthuis B.J.H.M.; Scholte H.R.; Vianey-Saban C.; Wanders R.; Ijlst L.; Morris A.; Pourfarzam M.; Bartlett K.; Baumgartner E.R.; de Klerk J.B.C.; Schroeder L.D.; Corydon T.J.; Lund H.; Winter V.; Bross P.; Bolund L.; Gregersen N.;
Am. J. Hum. Genet. 64:479-494(1999)
Cited for: VARIANTS ACADVLD ASP-43; ASN-158; ARG-159; MET-174; SER-185; LYS-218; ARG-243; THR-247; MET-260; LYS-278 DEL; ASP-281; ALA-283; ASP-290; GLU-294; ASN-299; ALA-317; VAL-352; CYS-366; HIS-366; GLU-381 DEL; HIS-405; ASP-441; HIS-450; GLN-453; ASN-454; HIS-456; TRP-459; GLU-463; GLN-469; TRP-469; PRO-502; ILE-602 AND TRP-613; Very long chain acyl-coenzyme A dehydrogenase deficiency with adult onset.
Smelt A.H.; Poorthuis B.J.H.M.; Onkenhout W.; Scholte H.R.; Andresen B.S.; van Duinen S.G.; Gregersen N.; Wintzen A.R.;
Ann. Neurol. 43:540-544(1998)
Cited for: VARIANT ACADVLD HIS-450;
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.