Evolutionary origins of the multienzyme architecture of giant fungal Fatty Acid synthase

Bukhari, Habib S. T. and Jakob, Roman P. and Maier, Timm. (2014) Evolutionary origins of the multienzyme architecture of giant fungal Fatty Acid synthase. Structure, 22 (12). pp. 1775-1785.

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Official URL: http://edoc.unibas.ch/dok/A6337471

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Fungal fatty acid synthase (fFAS) is a key paradigm for the evolution of complex multienzymes. Its 48 functional domains are embedded in a matrix of scaffolding elements, which comprises almost 50% of the total sequence and determines the emergent multienzymes properties of fFAS. Catalytic domains of fFAS are derived from monofunctional bacterial enzymes, but the evolutionary origin of the scaffolding elements remains enigmatic. Here, we identify two bacterial protein families of noncanonical fatty acid biosynthesis starter enzymes and trans-acting polyketide enoyl reductases (ERs) as potential ancestors of scaffolding regions in fFAS. The architectures of both protein families are revealed by representative crystal structures of the starter enzyme FabY and DfnA-ER. In both families, a striking structural conservation of insertions to scaffolding elements in fFAS is observed, despite marginal sequence identity. The combined phylogenetic and structural data provide insights into the evolutionary origins of the complex multienzyme architecture of fFAS.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Structural Biology & Biophysics > Structural Biology (Maier)
UniBasel Contributors:Maier, Timm
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 Jul 2018 12:34
Deposited On:06 Feb 2015 09:59

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