UniProtKB/Swiss-Prot P09917: Variant p.Glu254Lys

Polyunsaturated fatty acid 5-lipoxygenase
Gene: ALOX5
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Variant information Variant position:

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

LB/B 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 Glutamate (E) to Lysine (K) at position 254 (E254K, p.Glu254Lys). 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 acidic (E) to large size and basic (K) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score:

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:

Decreases arachidonate 5-lipoxygenase activity. Increases leukotriene A4 synthase activity. Any additional useful information about the variant.
Other resources:

Links to websites of interest for the variant.

Variant rs2228065 [ dbSNP | Ensembl ]

Sequence information Variant position:

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

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

GYQFLNGCNPVLIRRCTELP E KLPVTTEMVECSLERQLSLE 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                         GYQFLNGCNPVLIRRCTELPEKLPVTTEMVECSLERQLSLE

Mouse                         GYQFLNGCNPVLIKRCTALPPKLPVTTEMVECSLERQLSLE

Rat                           GYQFLNGCNPVLIKRCTELPKKLPVTTEMVECSLERQLSLE

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	1 – 674	Polyunsaturated fatty acid 5-lipoxygenase
Domain	119 – 674	Lipoxygenase
Modified residue	272 – 272	Phosphoserine; by MAPKAPK2
Mutagenesis	272 – 272	S -> A. Loss of phosphorylation site. Permits export from the nucleus.

Literature citations
Functional characterization of genetic enzyme variations in human lipoxygenases.
Horn T.; Reddy Kakularam K.; Anton M.; Richter C.; Reddanna P.; Kuhn H.;
Redox Biol. 1:566-577(2013)
Cited for: CATALYTIC ACTIVITY; FUNCTION; VARIANTS LYS-254; SER-337; SER-447; VAL-549; LEU-577; MET-591 AND GLN-656; CHARACTERIZATION OF VARIANTS LYS-254; SER-337; SER-447; VAL-549; LEU-577; MET-591 AND GLN-656; Arachidonate lipoxygenase (ALOX) and cyclooxygenase (COX) polymorphisms and colon cancer risk.
Goodman J.E.; Bowman E.D.; Chanock S.J.; Alberg A.J.; Harris C.C.;
Carcinogenesis 25:2467-2472(2004)
Cited for: VARIANT LYS-254;

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.