Structure and activity of DmmA, a marine haloalkane dehalogenase.
Gehret, J.J., Gu, L., Geders, T.W., Brown, W.C., Gerwick, L., Gerwick, W.H., Sherman, D.H., Smith, J.L.(2012) Protein Sci 21: 239-248
- PubMed: 22124946 
- DOI: https://doi.org/10.1002/pro.2009
- Primary Citation of Related Structures:  
3U1T - PubMed Abstract: 
DmmA is a haloalkane dehalogenase (HLD) identified and characterized from the metagenomic DNA of a marine microbial consortium. Dehalogenase activity was detected with 1,3-dibromopropane as substrate, with steady-state kinetic parameters typical of HLDs (K(m) = 0.24 ± 0.05 mM, k(cat) = 2.4 ± 0.1 s(-1) ). The 2.2-Å crystal structure of DmmA revealed a fold and active site similar to other HLDs, but with a substantially larger active site binding pocket, suggestive of an ability to act on bulky substrates. This enhanced cavity was shown to accept a range of linear and cyclic substrates, suggesting that DmmA will contribute to the expanding industrial applications of HLDs.
Organizational Affiliation: 
Life Sciences Institute, University of Michigan, 210 Washtenaw Ave., Ann Arbor, MI 48109, USA.