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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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The amino acid sequence of GTP:AMP phosphotransferase from beef-heart mitochondria. Extensive homology with cytosolic adenylate kinase.

The amino acid sequence of GTP:AMP phosphotransferase ( AK3) from beef-heart mitochondria has been determined, except for one segment of about 33 residues in the middle of the polypeptide chain. The established sequence has been unambiguously aligned to the sequence of cytosolic ATP:AMP phosphotransferase ( AK1) from pig muscle, allowing for six insertions and deletions. With 30% of all aligned residues being identical, the homology between AK3 and AK1 is well established. As derived from the known three-dimensional structure of AK1, the missing segment is localized at a small surface area of the molecule, far apart from the active center. The pattern of conserved residues demonstrates that earlier views on substrate binding have to be modified. The observation of three different consecutive N-termini indicates enzyme processing.[1]

References

  1. The amino acid sequence of GTP:AMP phosphotransferase from beef-heart mitochondria. Extensive homology with cytosolic adenylate kinase. Wieland, B., Tomasselli, A.G., Noda, L.H., Frank, R., Schulz, G.E. Eur. J. Biochem. (1984) [Pubmed]
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