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1cke

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Revision as of 07:29, 29 May 2019

CMP KINASE FROM ESCHERICHIA COLI FREE ENZYME STRUCTURE

Structural highlights

1cke is a 1 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	2cmk
Activity:	UMP/CMP kinase, with EC number 2.7.4.14
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[KCY_ECOLI] ATP, dATP, and GTP are equally effective as phosphate donors. CMP and dCMP are the best phosphate acceptors.^[1] ^[2]

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 PubMed

Background:. Nucleoside monophosphate kinases (NMP kinases) catalyze the reversible transfer of a phosphoryl group from a nucleoside triphosphate to a nucleoside monophosphate. Among them, cytidine monophosphate kinase from Escherichia coli has a striking particularity: it is specific for CMP, whereas in eukaryotes a unique UMP/CMP kinase phosphorylates both CMP and UMP with similar efficiency. Results:. The crystal structure of the CMP kinase apoenzyme from E. coli was solved by single isomorphous replacement and refined at 1.75 A resolution. The structure of the enzyme in complex with CDP was determined at 2.0 A resolution. Like other NMP kinases, the protein contains a central parallel beta sheet, the strands of which are connected by alpha helices. The enzyme differs from other NMP kinases in the presence of a 40-residue insert situated in the NMP-binding (NMPbind) domain. This insert contains two domains: one comprising a three-stranded antiparallel beta sheet, the other comprising two alpha helices. Conclusions:. Two features of the CMP kinase from E. coli have no equivalent in other NMP kinases of known structure. Firstly, the large NMPbind insert undergoes a CDP-induced rearrangement: its beta-sheet domain moves away from the substrate, whereas its helical domain comes closer to it in a motion likely to improve the protection of the active site. Secondly, residues involved in CDP recognition are conserved in CMP kinases and have no counterpart in other NMP kinases. The structures presented here are the first of a new family of NMP kinases specific for CMP.

Structures of escherichia coli CMP kinase alone and in complex with CDP: a new fold of the nucleoside monophosphate binding domain and insights into cytosine nucleotide specificity.,Briozzo P, Golinelli-Pimpaneau B, Gilles AM, Gaucher JF, Burlacu-Miron S, Sakamoto H, Janin J, Barzu O Structure. 1998 Dec 15;6(12):1517-27. PMID:9862805^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Yamanaka K, Ogura T, Koonin EV, Niki H, Hiraga S. Multicopy suppressors, mssA and mssB, of an smbA mutation of Escherichia coli. Mol Gen Genet. 1994 Apr;243(1):9-16. PMID:8190075
↑ Fricke J, Neuhard J, Kelln RA, Pedersen S. The cmk gene encoding cytidine monophosphate kinase is located in the rpsA operon and is required for normal replication rate in Escherichia coli. J Bacteriol. 1995 Feb;177(3):517-23. PMID:7836281
↑ Briozzo P, Golinelli-Pimpaneau B, Gilles AM, Gaucher JF, Burlacu-Miron S, Sakamoto H, Janin J, Barzu O. Structures of escherichia coli CMP kinase alone and in complex with CDP: a new fold of the nucleoside monophosphate binding domain and insights into cytosine nucleotide specificity. Structure. 1998 Dec 15;6(12):1517-27. PMID:9862805

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1cke"

@@ Line 1: / Line 1: @@
 ==CMP KINASE FROM ESCHERICHIA COLI FREE ENZYME STRUCTURE==
-<StructureSection load='1cke' size='340' side='right' caption='[[1cke]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
+<StructureSection load='1cke' size='340' side='right'caption='[[1cke]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1cke]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CKE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1CKE FirstGlance]. <br>
@@ Line 15: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ck/1cke_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ck/1cke_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 37: / Line 37: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: UMP/CMP kinase]]
 [[Category: Briozzo, P]]

1cke

From Proteopedia

Revision as of 07:29, 29 May 2019

CMP KINASE FROM ESCHERICHIA COLI FREE ENZYME STRUCTURE

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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