Home  |  Contact

UniProtKB/Swiss-Prot P37840: Variant p.His50Gln

Alpha-synuclein
Gene: SNCA
Variant information

Variant position:  50
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 Histidine (H) to Glutamine (Q) at position 50 (H50Q, p.His50Gln).
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:  Similar physico-chemical property. Both residues are medium size and polar.
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  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:  In PARK1; no effect on protein structure; no effect on phosphorylation of the protein; no effect on membrane- and lipid-binding; increases oligomerization; increases fibril formation; increases secretion of the protein; impairs copper-binding.
Any additional useful information about the variant.

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



Sequence information

Variant position:  50
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  140
The length of the canonical sequence.

Location on the sequence:   AGKTKEGVLYVGSKTKEGVV  H GVATVAEKTKEQVTNVGGAV
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                         AGKTKEGVLYVGSKTKEGVVHGVATVAEKTKEQVTNVGGAV

Gorilla                       AGKTKEGVLYVGSKTKEGVVHGVATVAEKTKEQVTNVGGAV

Rhesus macaque                AGKTKEGVLYVGSKTKEGVVHGVATVAEKTKEQVTNVGGAV

Chimpanzee                    AGKTKEGVLYVGSKTKEGVVHGVATVAEKTKEQVTNVGGAV

Mouse                         AGKTKEGVLYVGSKTKEGVVHGVTTVAEKTKEQVTNVGGAV

Rat                           AGKTKEGVLYVGSKTKEGVVHGVTTVAEKTKEQVTNVGGAV

Pig                           AGKTKEGVLYVGSKTKEGVVHGVTTVAEKTKEQVTNVGEAV

Bovine                        AGRTKEGVLYVGSKTKEGVVHGVTTVAEKTKEQVTNVGEAV

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 – 140 Alpha-synuclein
Repeat 42 – 56 3; approximate
Region 20 – 67 4 X 11 AA tandem repeats of [EGS]-K-T-K-[EQ]-[GQ]-V-X(4)
Metal binding 50 – 50 Copper
Alternative sequence 41 – 54 Missing. In isoform 2-5.
Mutagenesis 35 – 35 E -> K. No effect on oligomerization.
Mutagenesis 39 – 39 Y -> F. No effect on osmotic stress-induced phosphorylation.
Mutagenesis 50 – 50 H -> A. Impairs copper-binding.
Mutagenesis 57 – 57 E -> K. Increases oligomerization.


Literature citations

Alpha-synuclein p.H50Q, a novel pathogenic mutation for Parkinson's disease.
Appel-Cresswell S.; Vilarino-Guell C.; Encarnacion M.; Sherman H.; Yu I.; Shah B.; Weir D.; Thompson C.; Szu-Tu C.; Trinh J.; Aasly J.O.; Rajput A.; Rajput A.H.; Jon Stoessl A.; Farrer M.J.;
Mov. Disord. 28:811-813(2013)
Cited for: VARIANT PARK1 GLN-50;

A novel alpha-synuclein missense mutation in Parkinson disease.
Proukakis C.; Dudzik C.G.; Brier T.; MacKay D.S.; Cooper J.M.; Millhauser G.L.; Houlden H.; Schapira A.H.;
Neurology 80:1062-1064(2013)
Cited for: VARIANT PARK1 GLN-50; CHARACTERIZATION OF VARIANT PARK1 GLN-50;

The H50Q mutation enhances alpha-synuclein aggregation, secretion, and toxicity.
Khalaf O.; Fauvet B.; Oueslati A.; Dikiy I.; Mahul-Mellier A.L.; Ruggeri F.S.; Mbefo M.K.; Vercruysse F.; Dietler G.; Lee S.J.; Eliezer D.; Lashuel H.A.;
J. Biol. Chem. 289:21856-21876(2014)
Cited for: CHARACTERIZATION OF VARIANT PARK1 GLN-50; SUBCELLULAR LOCATION; SUBUNIT; PHOSPHORYLATION AT SER-129;

Molecular determinants of alpha-synuclein mutants' oligomerization and membrane interactions.
Tsigelny I.F.; Sharikov Y.; Kouznetsova V.L.; Greenberg J.P.; Wrasidlo W.; Overk C.; Gonzalez T.; Trejo M.; Spencer B.; Kosberg K.; Masliah E.;
ACS Chem. Neurosci. 6:403-416(2015)
Cited for: CHARACTERIZATION OF VARIANTS PARK1 PRO-30; LYS-46; GLN-50 AND THR-53; MUTAGENESIS OF GLU-35 AND GLU-57; SUBCELLULAR LOCATION; SUBUNIT;

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.