Expasy logo

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P49768: Variant p.Pro117Leu

Presenilin-1
Gene: PSEN1
Feedback?
Variant information Variant position: help 117 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 Proline (P) to Leucine (L) at position 117 (P117L, p.Pro117Leu). 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 Similar physico-chemical property. Both residues are medium size and hydrophobic. The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 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 AD3; impaired ability to cleave Ephb2/CTF1; results in altered amyloid-beta production and increased amyloid-beta 42/amyloid-beta 40 ratio; impaired regulation of neurite outgrowth. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 117 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 467 The length of the canonical sequence.
Location on the sequence: help VATIKSVSFYTRKDGQLIYT P FTEDTETVGQRALHSILNAA 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.
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 – 298 Presenilin-1 NTF subunit
Topological domain 104 – 132 Lumenal
Mutagenesis 99 – 99 T -> A. Nearly abolishes protease activity with APP. Increased amyloid-beta 42/amyloid-beta 40 ratio in vitro.
Mutagenesis 105 – 105 F -> I. Nearly abolishes protease activity with APP. Increased amyloid-beta 42/amyloid-beta 40 ratio in vitro.
Mutagenesis 108 – 108 R -> Q. Nearly abolishes protease activity with APP.
Mutagenesis 112 – 112 Q -> C. Formation of an artifactual disulfide bond with a substrate protein.
Mutagenesis 113 – 113 L -> Q. Severe decrease of protease activity with APP. Increased amyloid-beta 42/amyloid-beta 40 ratio in vitro.
Mutagenesis 117 – 117 P -> A. Nearly abolishes protease activity with APP. Increased amyloid-beta 42/amyloid-beta 40 ratio in vitro.
Mutagenesis 123 – 123 E -> K. Nearly abolishes protease activity with APP. Increased amyloid-beta 42/amyloid-beta 40 ratio in vitro.
Mutagenesis 131 – 131 H -> R. Severe decrease of protease activity with APP.
Mutagenesis 136 – 136 A -> G. Decreased protease activity with APP.



Literature citations
A novel highly pathogenic Alzheimer presenilin-1 mutation in codon 117 (Pro117Ser): Comparison of clinical, neuropathological and cell culture phenotypes of Pro117Leu and Pro117Ser mutations.
Dowjat W.K.; Kuchna I.; Wisniewski T.; Wegiel J.;
J. Alzheimers Dis. 6:31-43(2004)
Cited for: FUNCTION; SUBCELLULAR LOCATION; VARIANT AD3 SER-117; CHARACTERIZATION OF VARIANTS AD3 LEU-117 AND SER-117; A novel Polish presenilin-1 mutation (P117L) is associated with familial Alzheimer's disease and leads to death as early as the age of 28 years.
Wisniewski T.; Dowjat W.K.; Buxbaum J.D.; Khorkova O.; Efthimiopoulos S.; Kulczycki J.; Lojkowska W.; Wegiel J.; Wisniewski H.M.; Frangione B.;
NeuroReport 9:217-221(1998)
Cited for: VARIANT AD3 LEU-117; Ligand binding and calcium influx induce distinct ectodomain/gamma-secretase-processing pathways of EphB2 receptor.
Litterst C.; Georgakopoulos A.; Shioi J.; Ghersi E.; Wisniewski T.; Wang R.; Ludwig A.; Robakis N.K.;
J. Biol. Chem. 282:16155-16163(2007)
Cited for: CHARACTERIZATION OF VARIANTS AD3 LEU-117; LEU-146; GLU-246; VAL-260; LEU-264 AND GLY-280; FUNCTION; MUTAGENESIS OF ASP-257;
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.