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Hegg, E.L. and Jr, L.Q. (1997) The 2-his-1-carboxylate facial triad—An emerging structural motif in mononuclear non-heme iron(ii) enzymes. European Journal of Biochemistry, 250, 625-629. doi:10.1111/j.1432-1033.1997.t01-1-00625.x

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• TITLE: Crystal structure of PqqB from Pseudomonas putida at 2.2 Å resolution

  AUTHORS: Moritz Metlitzky, Sandra Puehringer, Stuart J. Fisher

  KEYWORDS: PqqB; PQQ; Biosynthetic Pathway; X-Ray Crystallography

  JOURNAL NAME: Journal of Biophysical Chemistry, Vol.3 No.2, May 29, 2012

  ABSTRACT: Pyrroloquinoline quinone (PQQ) is an important redox-active cofactor for many bacterial dehy-drogenases. It's biosynthetic pathway involves six or seven genes, one of which is pqqB. Former studies indicated that the protein encoded by pqqB, namely PqqB, functions as a PQQ transporter. Here we report the crystal structure of PqqB from Pseudomonas putida at 2.2 ? resolution together with functional studies to verify this theory.