Uridylate kinase: Difference between revisions
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== Function == | == Function == | ||
'''Uridylate kinase''' (UK) catalyzes the reversible transfer of phosphate from UMP to UDP using ATP as a phosphate source. UDP is the starting point of synthesis of all other pyrimidine nucleotides. The eukaryotic UK has specificity to both UMP and CMP while the bacterial one is specific for UMP. The bacterial UK is Mg+2 dependent and is activated by GTP and repressed by UTP. The bacterial UK is composed of a C terminal ATP-binding domain and an N terminal UMP-binding domain<ref>PMID:15454079</ref>. | '''Uridylate kinase''' (UK) catalyzes the reversible transfer of phosphate from UMP to UDP using ATP as a phosphate source. UDP is the starting point of synthesis of all other pyrimidine nucleotides. The eukaryotic UK has specificity to both UMP and CMP while the bacterial one is specific for UMP. The bacterial UK is Mg+2 dependent and is activated by GTP and repressed by UTP. The bacterial UK is composed of a C terminal ATP-binding domain and an N terminal UMP-binding domain<ref>PMID:15454079</ref>. | ||
== Structural highlights == | |||
The active site of UK has high specificity to uracil and excludes purine nucleotides<ref>PMID:17297917</ref>. | |||
</StructureSection> | </StructureSection> | ||
==3D structures of uridylate kinase== | ==3D structures of uridylate kinase== | ||
Revision as of 11:45, 11 December 2016
FunctionUridylate kinase (UK) catalyzes the reversible transfer of phosphate from UMP to UDP using ATP as a phosphate source. UDP is the starting point of synthesis of all other pyrimidine nucleotides. The eukaryotic UK has specificity to both UMP and CMP while the bacterial one is specific for UMP. The bacterial UK is Mg+2 dependent and is activated by GTP and repressed by UTP. The bacterial UK is composed of a C terminal ATP-binding domain and an N terminal UMP-binding domain[1]. Structural highlightsThe active site of UK has high specificity to uracil and excludes purine nucleotides[2]. |
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3D structures of uridylate kinase3D structures of uridylate kinase
Updated on 11-December-2016
ReferencesReferences
- ↑ Dhar G, Sanders ER, Johnson RC. Architecture of the hin synaptic complex during recombination: the recombinase subunits translocate with the DNA strands. Cell. 2004 Oct 1;119(1):33-45. PMID:15454079 doi:http://dx.doi.org/10.1016/j.cell.2004.09.010
- ↑ Jensen KS, Johansson E, Jensen KF. Structural and enzymatic investigation of the Sulfolobus solfataricus uridylate kinase shows competitive UTP inhibition and the lack of GTP stimulation. Biochemistry. 2007 Mar 13;46(10):2745-57. Epub 2007 Feb 13. PMID:17297917 doi:10.1021/bi0618159