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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P07101: Variant p.Thr494Met

Tyrosine 3-monooxygenase
Gene: TH
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Variant information Variant position: help 494 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 Threonine (T) to Methionine (M) at position 494 (T494M, p.Thr494Met). 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 medium size and polar (T) to medium size and hydrophobic (M) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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
Variant description: help In ARSEGS; parkinsonian symptoms in infancy; no effect on tyrosine 3-monooxygenase activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 494 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 528 The length of the canonical sequence.
Location on the sequence: help KLRSYASRIQRPFSVKFDPY T LAIDVLDSPQAVRRSLEGVQ 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                         KLRSYASRIQRPFSVKFDPYTLAIDVLDSPQAVRRSLEGVQ

                              KLRNYASRIQRPFSVKFDPYTLAIDVLDSPHAIRRSLEGVQ

Mouse                         KLRNYASRIQRPFSVKFDPYTLAIDVLDSPHTIRRSLEGVQ

Rat                           KLRNYASRIQRPFSVKFDPYTLAIDVLDSPHTIQRSLEGVQ

Bovine                        KLRSYASRIQRPFSVKFDPYTLAIDVLDSPHAIRHALDGVQ

Caenorhabditis elegans        KLRKYASSMDRPFSVVYDPFTKSIEAIESSADLEKAFSRLS

Drosophila                    KFRRWVSTMSRPFEVRFNPHTERVEVLDSVDKLETLVHQMN
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 1 – 528 Tyrosine 3-monooxygenase
Modified residue 502 – 502 Phosphoserine
Turn 492 – 495



Literature citations
Four novel mutations in the tyrosine hydroxylase gene in patients with infantile parkinsonism.
Swaans R.J.M.; Rondot P.; Renier W.O.; Van Den Heuvel L.P.W.J.; Steenbergen-Spanjers G.C.H.; Wevers R.A.;
Ann. Hum. Genet. 64:25-31(2000)
Cited for: VARIANTS ARSEGS PRO-276; MET-314; HIS-337 AND MET-494; Functional studies of tyrosine hydroxylase missense variants reveal distinct patterns of molecular defects in Dopa-responsive dystonia.
Fossbakk A.; Kleppe R.; Knappskog P.M.; Martinez A.; Haavik J.;
Hum. Mutat. 35:880-890(2014)
Cited for: FUNCTION; CATALYTIC ACTIVITY; BIOPHYSICOCHEMICAL PROPERTIES; CHARACTERIZATION OF VARIANTS ARSEGS TYR-207; GLY-227; HIS-233; PRO-236; THR-241; TYR-246; SER-247; GLY-259; PRO-276; ALA-301; SER-309; MET-314; PRO-319; TRP-328; HIS-337; PHE-359; LEU-375; VAL-376; MET-387; THR-394; MET-399; LYS-412; ARG-414; PRO-441; GLY-467; LEU-492; MET-494; GLY-498 AND GLN-510;
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.