Abstract
The enzyme porphobilinogen deaminase (PBGD; hydroxymethylbilane synthase; EC 2.5.1.61) catalyses an early step of the tetrapyrrole-biosynthesis pathway in which four molecules of the monopyrrole porphobilinogen are condensed to form a linear tetrapyrrole. The enzyme possesses a dipyrromethane cofactor which is covalently linked by a thioether bridge to an invariant cysteine residue. Expression in Escherichia coli of a His-tagged form of Bacillus megaterium PBGD permitted the crystallization and preliminary X-ray analysis of the enzyme from this species at high resolution.
Original language | English |
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Pages (from-to) | 906-908 |
Journal | Acta Crystallographica - Section F |
Volume | 69 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1 Aug 2013 |
Keywords
- tetrapyrrole biosysthesis
- porphobilinogen deaminase
- Bacillus megaterium
- dipyrromethane cofactor