Molecular cloning and amino acid sequence of human 5-lipoxygenase

Journal Article · Fri Jan 01 00:00:00 EST 1988 · Proc. Natl. Acad. Sci. U.S.A.; (United States)

DOI:https://doi.org/10.1073/pnas.85.1.26· OSTI ID:6464728

Matsumoto, T; Funk, C D; Radmark, O; Hoeoeg, J O; Joernvall, H; Samuelsson, B

5-Lipoxygenase (EC 1.13.11.34), a Ca/sup 2 +/- and ATP-requiring enzyme, catalyzes the first two steps in the biosynthesis of the peptidoleukotrienes and the chemotactic factor leukotriene B/sub 4/. A cDNA clone corresponding to 5-lipoxygenase was isolated from a human lung lambda gt11 expression library by immunoscreening with a polyclonal antibody. Additional clones from a human placenta lambda gt11 cDNA library were obtained by plaque hybridization with the /sup 32/P-labeled lung cDNA clone. Sequence data obtained from several overlapping clones indicate that the composite DNAs contain the complete coding region for the enzyme. From the deduced primary structure, 5-lipoxygenase encodes a 673 amino acid protein with a calculated molecular weight of 77,839. Direct analysis of the native protein and its proteolytic fragments confirmed the deduced composition, the amino-terminal amino acid sequence, and the structure of many internal segments. 5-Lipoxygenase has no apparent sequence homology with leukotriene A/sub 4/ hydrolase or Ca/sup 2 +/-binding proteins. RNA blot analysis indicated substantial amounts of an mRNA species of approx. = 2700 nucleotides in leukocytes, lung, and placenta.

• Research Organization: Karolinska Institutet, Stockholm (Sweden)
• OSTI ID: 6464728
• Journal Information: Proc. Natl. Acad. Sci. U.S.A.; (United States), Vol. 85:1
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
OXYGENASES
AMINO ACID SEQUENCE
RECOMBINANT DNA
DNA-CLONING
HYBRIDIZATION
INFLAMMATION
LUNGS
MAN
PHOSPHORUS 32
PLACENTA
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
CLONING
DAYS LIVING RADIOISOTOPES
DNA
DNA HYBRIDIZATION
ENZYMES
FETAL MEMBRANES
ISOTOPES
LIGHT NUCLEI
MAMMALS
MEMBRANES
MOLECULAR STRUCTURE
NUCLEI
NUCLEIC ACIDS
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANS
OXIDOREDUCTASES
PATHOLOGICAL CHANGES
PHOSPHORUS ISOTOPES
PRIMATES
RADIOISOTOPES
RESPIRATORY SYSTEM
SYMPTOMS
VERTEBRATES
550201* - Biochemistry- Tracer Techniques