UniProtKB/Swiss-Prot P02649: Variant p.Leu270Glu

Apolipoprotein E
Gene: APOE
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Variant information Variant position:

270 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant:

US 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 Leucine (L) to Glutamate (E) at position 270 (L270E, p.Leu270Glu). 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 medium size and hydrophobic (L) to medium size and acidic (E) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score:

-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:

In ApoE1 HE; requires 2 nucleotide substitutions. Any additional useful information about the variant.

Sequence information Variant position:

270 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length:

317 The length of the canonical sequence.
Location on the sequence:

VKEQVAEVRAKLEEQAQQIR L QAEAFQARLKSWFEPLVEDM 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                         VKEQVAEVRAKLEEQAQQIRLQAEAFQARLKSWFEPLVEDM

Gorilla                       VKEQVAEVRAKLEEQAQQIRLQAEAFQARLKSWFEPLVEDM

                              MREQIQEVRVKMEEQADQIRQKAEAFQARLKSWFEPLLEDM

Rhesus macaque                VKEQVAEVRAKLEEQAQQISLQAEAFQARLKSWFEPLVEDM

Chimpanzee                    VKEQVAEVRAKLEEQAQQIRLQAEAFQARLKSWFEPLVEDM

Mouse                         VREHMEEVRSKMEEQTQQIRLQAEIFQARLKGWFEPIVEDM

Rat                           VREQMEEVRSKMEEQTQQIRLQAEIFQARIKGWFEPLVEDM

Pig                           MRDELEEVRTKVEEQGSQLRLQAEAFQARLKGWFEPLVEDM

Bovine                        IRQQLEEVHAKVEEQGNQMRLQAEAFQARLRSWFEPLVEDM

Rabbit                        VREQVEEVRVKVEEQAPQMRLQAEAFQARLKSWFEPLVEDM

Sheep                         MRQQLEEVRSKVEEQGSQIRLQAEAFQARLRSWFEPLVEDM

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.

Type	Positions	Description
Chain	19 – 317	Apolipoprotein E
Region	210 – 290	Lipid-binding and lipoprotein association
Region	266 – 317	Homooligomerization
Helix	257 – 283

Literature citations
Characterization of five new mutants in the carboxyl-terminal domain of human apolipoprotein E: no cosegregation with severe hyperlipidemia.
van den Maagdenberg A.M.J.M.; Weng W.; de Bruijn I.H.; de Knijff P.; Funke H.; Smelt A.H.M.; Leuven J.A.G.; van 't Hooft F.M.; Assmann G.; Hofker M.H.; Havekes L.M.; Frants R.R.;
Am. J. Hum. Genet. 52:937-946(1993)
Cited for: VARIANTS GLU-254; GLY-269; GLU-270; HIS-292 AND ARG-314;

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.