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  • Title: The primary structure of thioredoxin from the filamentous cyanobacterium Anabaena sp. 7119.
    Author: Gleason FK, Whittaker MM, Holmgren A, Jörnvall H.
    Journal: J Biol Chem; 1985 Aug 15; 260(17):9567-73. PubMed ID: 3926769.
    Abstract:
    Thioredoxin from the cyanobacterium Anabaena 7119 serves as electron donor to ribonucleotide reductase and as a protein disulfide reductase. This small, heat-stable protein was found to have structural and functional similarities to thioredoxins from both bacterial and mammalian sources. We here report the complete primary structure of Anabaena thioredoxin. The structure was determined by analysis of peptides obtained after cleavage with cyanogen bromide, Staphylococcus aureus protease, and trypsin. The protein consists of 106 residues with the following amino acid sequence: Ser-Ala-Ala-Ala-Gln-Val-Thr-Asp- Ser-Thr-Phe-Lys-Gln-Glu-Val-Leu-Asp-Ser-Asp-Val-Pro-Val-leu-Val-Asp-Phe- Trp-Ala-Pro-Trp-Cys-Gly-Pro-Cys-Arg-Met-Val-Ala-Pro-Val-Val-Asp-Glu- Ile-Ala-Gln-Gln-Tyr-Glu-Gly-Lys-Ile-Lys-Val-Val-Lys-Val-Asn-Thr-Asp- Glu-Asn-Pro-Gln-Val-Ala-Ser-Gln-Tyr-Gly-Ile-Arg-Ser-Ile-Pro-Thr-Leu- Met-Ile-Phe-Lys-Gly-Gly-Gln-Lys-Val-Asp-Met-Val-Val-Gly-Ala-Val-Pro- Lys-Thr-Thr-Leu-Ser-Gln-Thr-Leu-Glu-Lys-His-Leu. The sequence of Anabaena thioredoxin shows a definite homology to the protein from Escherichia coli, with 49% residue identities occurring in the proteins when aligned at the active site disulfide.
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