4CW4

Crystal structure of the noncanonical ketosynthase FabY from P. aeruginosa

Summary for 4CW4

• Entry DOI: 10.2210/pdb4cw4/pdb
• Related: 4CW5
• Descriptor: BETA-KETOACYL SYNTHASE, SULFATE ION, CHLORIDE ION, ... (4 entities in total)
• Functional Keywords: transferase, fas, fatty acid synthase, kas, kas i/ii
• Biological source: PSEUDOMONAS AERUGINOSA
• Total number of polymer chains: 1
• Total formula weight: 69570.93

Authors

Bukhari, H.S.T.,Jakob, R.P.,Maier, T. (deposition date: 2014-04-01, release date: 2014-12-17, Last modification date: 2023-12-20)

Primary citation

Bukhari, H.S.,Jakob, R.P.,Maier, T.
Evolutionary Origins of the Multienzyme Architecture of Giant Fungal Fatty Acid Synthase.
Structure, 22:1775-, 2014

PubMed Abstract: 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.

PubMed: 25456814
DOI: 10.1016/J.STR.2014.09.016

Experimental method

X-RAY DIFFRACTION (1.349 Å)