2X8U

Sphingomonas wittichii Serine palmitoyltransferase

Summary for 2X8U

• Entry DOI: 10.2210/pdb2x8u/pdb
• Descriptor: SERINE PALMITOYLTRANSFERASE, PYRIDOXAL-5'-PHOSPHATE (3 entities in total)
• Functional Keywords: transferase, acyltransferase
• Biological source: SPHINGOMONAS WITTICHII
• Total number of polymer chains: 2
• Total formula weight: 89578.10

Authors

Raman, M.C.C.,Johnson, K.A.,Campopiano, D.J.,Naismith, J.H. (deposition date: 2010-03-12, release date: 2010-03-23, Last modification date: 2025-04-09)

Primary citation

Raman, M.C.C.,Johnson, K.A.,Clarke, D.J.,Naismith, J.H.,Campopiano, D.J.
The Serine Palmitoyltransferase from Sphingomonas Wittichii Rw1 an Interesting Link to an Unusual Acyl Carrier Protein
Biopolymers, 93:811-, 2010

PubMed Abstract: Serine palmitoyltransferase (SPT) catalyses the first step in the de novo biosynthesis of sphingolipids (SLs). It uses a decarboxylative Claisen-like condensation reaction to couple L-serine with palmitoyl-CoA to generate a long-chain base product, 3-ketodihydrosphingosine. SLs are produced by mammals, plants, yeast, and some bacteria, and we have exploited the complete genome sequence of Sphingomonas wittichii to begin a complete analysis of bacterial sphingolipid biosynthesis. Here, we describe the enzymatic characterization of the SPT from this organism and present its high-resolution x-ray structure. Moreover, we identified an open reading frame with high sequence homology to acyl carrier proteins (ACPs) that are common to fatty acid biosynthetic pathways. This small protein was co-expressed with the SPT and we isolated and characterised the apo- and holo-forms of the ACP. Our studies suggest a link between fatty acid and sphingolipid metabolism.

PubMed: 20578000
DOI: 10.1002/BIP.21482

Experimental method

X-RAY DIFFRACTION (2.1 Å)