CODH-IV: A High-Efficiency CO-Scavenging CO Dehydrogenase with Resistance to O2.
Domnik, L., Merrouch, M., Goetzl, S., Jeoung, J.H., Leger, C., Dementin, S., Fourmond, V., Dobbek, H.(2017) Angew Chem Int Ed Engl 56: 15466-15469
- PubMed: 29024326 
- DOI: https://doi.org/10.1002/anie.201709261
- Primary Citation of Related Structures:  
6ELQ - PubMed Abstract: 
CO dehydrogenases (CODHs) catalyse the reversible conversion between CO and CO 2 . Genomic analysis indicated that the metabolic functions of CODHs vary. The genome of Carboxydothermus hydrogenoformans encodes five CODHs (CODH-I-V), of which CODH-IV is found in a gene cluster near a peroxide-reducing enzyme. Our kinetic and crystallographic experiments reveal that CODH-IV differs from other CODHs in several characteristic properties: it has a very high affinity for CO, oxidizes CO at diffusion-limited rate over a wide range of temperatures, and is more tolerant to oxygen than CODH-II. Thus, our observations support the idea that CODH-IV is a CO scavenger in defence against oxidative stress and highlight that CODHs are more diverse in terms of reactivity than expected.
Organizational Affiliation: 
Institut für Biologie, Strukturbiologie/Biochemie, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099, Berlin, Germany.