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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P05067: Variant p.Glu693Lys

Amyloid-beta precursor protein
Gene: APP
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Variant information Variant position: help 693 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 Glutamate (E) to Lysine (K) at position 693 (E693K, p.Glu693Lys). 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 acidic (E) to large size and basic (K) 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 CAA-APP; Italian type. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 693 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 770 The length of the canonical sequence.
Location on the sequence: help AEFRHDSGYEVHHQKLVFFA E DVGSNKGAIIGLMVGGVVIA 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                         AEFRHDSGYEVHHQKLVF-----FAEDV-GSNKGAIIG--LMVGGVVIA

Chimpanzee                    AEFRHDSGYEVHHQKLVF-----FAEDV-GSNKGAIIG--L

Mouse                         AEFGHDSGFEVRHQKLVF-----FAEDV-GSNKGAIIG--L

Rat                           AEFGHDSGFEVRHQKLVF-----FAEDV-GSNKGAIIG--L

Pig                           AEFRHDSGYEVHHQKLVF-----FAEDV-GSNKGAIIG--L

Caenorhabditis elegans        PIIDEPASF-YRHDKLI------QSPEV-ERSASSVFQPYV

Drosophila                    PQVQHFMTHDLGHRESSFSLRREFAQHAHAAKEGRNVYFTL
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 18 – 770 Amyloid-beta precursor protein
Chain 672 – 770 C99
Chain 672 – 713 Amyloid-beta protein 42
Chain 672 – 711 Amyloid-beta protein 40
Chain 688 – 770 C83
Peptide 688 – 713 P3(42)
Peptide 688 – 711 P3(40)
Chain 691 – 770 C80
Topological domain 18 – 701 Extracellular
Binding site 677 – 677
Binding site 677 – 677
Binding site 681 – 681
Binding site 681 – 681
Binding site 684 – 684
Binding site 684 – 684
Binding site 685 – 685
Binding site 685 – 685
Site 704 – 704 Implicated in free radical propagation
Site 706 – 706 Susceptible to oxidation
Glycosylation 681 – 681 O-linked (HexNAc...) tyrosine; partial
Alternative sequence 306 – 770 Missing. In isoform APP305.
Mutagenesis 676 – 676 R -> G. 60-70% zinc-induced amyloid-beta protein 28 aggregation.
Mutagenesis 681 – 681 Y -> F. 60-70% zinc-induced amyloid-beta protein 28 aggregation.
Mutagenesis 684 – 684 H -> R. Only 23% zinc-induced amyloid-beta protein 28 aggregation.
Mutagenesis 695 – 695 V -> C. Causes formation of an artifactual disulfide bond with PSEN1.
Mutagenesis 704 – 704 G -> V. Reduced protein oxidation. No hippocampal neuron toxicity.
Mutagenesis 706 – 706 M -> L. Reduced lipid peroxidation inhibition.
Mutagenesis 706 – 706 M -> V. No free radical production. No hippocampal neuron toxicity.
Beta strand 692 – 694



Literature citations
Hereditary cerebral hemorrhage with amyloidosis associated with the E693K mutation of APP.
Bugiani O.; Giaccone G.; Rossi G.; Mangieri M.; Capobianco R.; Morbin M.; Mazzoleni G.; Cupidi C.; Marcon G.; Giovagnoli A.; Bizzi A.; Di Fede G.; Puoti G.; Carella F.; Salmaggi A.; Romorini A.; Patruno G.M.; Magoni M.; Padovani A.; Tagliavini F.;
Arch. Neurol. 67:987-995(2010)
Cited for: VARIANT CAA-APP LYS-693;
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.