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Structure of L-rhamnulose kinase in complex with ADP and beta-L- rhamnulose.
Structural highlights
FunctionRHAB_ECOUT Involved in the catabolism of L-rhamnose (6-deoxy-L-mannose). It could also play a role in the metabolism of some rare sugars such as L-fructose. Catalyzes the transfer of the gamma-phosphate group from ATP to the 1-hydroxyl group of L-rhamnulose to yield L-rhamnulose 1-phosphate. It can also phosphorylate L-fuculose and L-xylulose. It requires the R-configuration at the C-3 atom.[HAMAP-Rule:MF_01535][1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe enzyme L-rhamnulose kinase from Escherichia coli participates in the degradation pathway of L-rhamnose, a common natural deoxy-hexose. The structure of the enzyme in a ternary complex with its substrates ADP and L-rhamnulose has been determined at 1.55A resolution and refined to R(cryst)/R(free) values of 0.179/0.209. The result was compared with the lower resolution structure of a corresponding complex containing L-fructose instead of L-rhamnulose. In light of the two established sugar positions and conformations, a number of rare sugars have been modeled into the active center of L-rhamnulose kinase and the model structures have been compared with the known enzymatic phosphorylation rates. Rare sugars are of rising interest for the synthesis of bioactive compounds. Substrate spectrum of L-rhamnulose kinase related to models derived from two ternary complex structures.,Grueninger D, Schulz GE FEBS Lett. 2007 Jun 26;581(16):3127-30. Epub 2007 Jun 6. PMID:17568582[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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