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UniProtKB/Swiss-Prot Q16134: Variant p.Phe16Cys

Electron transfer flavoprotein-ubiquinone oxidoreductase, mitochondrial
Gene: ETFDH
Variant information

Variant position:  16
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Phenylalanine (F) to Cysteine (C) at position 16 (F16C, p.Phe16Cys).
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 large size and aromatic (F) to medium size and polar (C)
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



Sequence information

Variant position:  16
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  617
The length of the canonical sequence.

Location on the sequence:   MLVPLAKLSCLAYQC  F HALKIKKNYLPLCATRWSST
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                         MLVPLA----------KLSCLAYQCFHALKIK--KNYLPLCATRWSST

Mouse                         MLVRLT----------KLSCPAYHWFHALKI---KK

Rat                           MLVRLT----------KLSCPAYQWFHALKI---KK

Pig                           MMVPLA----------KLASPAYQCFHALKIK--KN

Bovine                        MQVLLA----------RLACPVYQCFHAIKIK--KN

Caenorhabditis elegans        MRISGV----------TL----------FRVS--SQ

Slime mold                    MLKSFS----------LI---------GKNIT--KN

Baker's yeast                 NLIRGI----------R-----------MTISAKSR

Fission yeast                 ALARSVGAKHLTGVLRKIGRRGGRSMHVLPLASPST

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
Transit peptide 1 – 33 Mitochondrion
Alternative sequence 12 – 58 Missing. In isoform 2.


Literature citations

Glutaric acidemia type II: gene structure and mutations of the electron transfer flavoprotein:ubiquinone oxidoreductase (ETF:QO) gene.
Goodman S.I.; Binard R.J.; Woontner M.R.; Frerman F.E.;
Mol. Genet. Metab. 77:86-90(2002)
Cited for: VARIANTS GA2C CYS-49; PHE-82; PRO-82; ARG-138; ASN-218; PRO-222; PHE-262; PRO-334; ARG-346; LYS-452; LEU-456; LEU-562 AND GLU-611; VARIANTS CYS-16 AND ILE-31;

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.